US20080138178A1 - High throughput serial wafer handling end station - Google Patents
High throughput serial wafer handling end station Download PDFInfo
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- US20080138178A1 US20080138178A1 US11/634,644 US63464406A US2008138178A1 US 20080138178 A1 US20080138178 A1 US 20080138178A1 US 63464406 A US63464406 A US 63464406A US 2008138178 A1 US2008138178 A1 US 2008138178A1
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- workpiece
- load lock
- robot
- workpieces
- alignment mechanism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67161—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
- H01L21/67213—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process comprising at least one ion or electron beam chamber
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/48—Ion implantation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67201—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the construction of the load-lock chamber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
- H01L21/67265—Position monitoring, e.g. misposition detection or presence detection of substrates stored in a container, a magazine, a carrier, a boat or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67742—Mechanical parts of transfer devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67745—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber characterized by movements or sequence of movements of transfer devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68707—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a robot blade, or gripped by a gripper for conveyance
Definitions
- the present invention relates generally to workpiece processing systems and methods for processing workpieces, and more specifically to a system and method for handling workpieces wherein throughput is maximized.
- operations such as an exchange of workpieces between transport carriers or storage cassettes and the processing system, a transfer of the workpiece from an atmospheric environment into an evacuated environment of an implantation chamber of the processing system, and an orientation of the workpiece (e.g., notch alignment) within the evacuated environment, can have a significant impact on tool productivity.
- Processing of a workpiece is typically performed at a reduced pressure within an implantation chamber, wherein ions are generally accelerated along a beam line, and wherein the ions enter the evacuated implantation chamber and strike the workpiece in a predetermined manner.
- Several operations are typically performed leading up to the implantation in order to introduce the workpiece into the implantation chamber, as well as to properly position and orient the workpiece with respect to the ion beam within the ion implantation chamber.
- the workpiece is transferred via a robot from an atmospheric cassette or storage device into a load lock chamber, wherein the load lock chamber is subsequently evacuated in order to bring the workpiece into the processing environment of the ion implanter.
- the cassette or storage device may be delivered to the ion implanter via a conveyor system or other type of delivery.
- Front opening unified pods have become a popular mechanism for moving silicon workpieces or wafers from one workstation to another in an integrated circuit (IC) fabrication facility.
- FOUPs Front opening unified pods
- IC integrated circuit
- FOUPs Front opening unified pods
- a FOUP containing a number of stacked wafers is delivered from one tool to a next subsequent tool by an automated delivery device such as an overhead transport.
- the overhead transport deposits the pod to a location within the reach of a robot so that a robotic arm can extract one or more silicon wafers from the pod for treatment.
- U.S. Pat. No. 5,486,080 to Sieradzki for example; details a system for transferring wafers for vacuum processing. The system employs two wafer transport robots for moving wafers from two load locks past a processing station. Additional patents relating to serial end stations are U.S. Pat. Nos. 6,350,097, 6,555,825, and 5,003,183. Further, commonly-owned U.S. Pat. No. 7,010,388 to Mitchell et al. details a wafer handling system for handling one or two wafers at a time.
- the workpiece handling system pre-processing routines utilized in ion implantation, each workpiece must be oriented properly relative to the ion beam.
- a mechanism known as an aligner is used for such an alignment step, where each workpiece is aligned serially, thus potentially decreasing throughput.
- the present invention overcomes the limitations of the prior art by providing a system, apparatus, and method for transferring workpieces between atmospheric and vacuum environments, while maximizing throughput and minimizing costs of ownership associated with the systems. More particularly, the present invention provides a system and method for reducing a cost of ownership of the system by minimizing an idle time, or the amount of time a processing system is operating but not producing a processed workpiece.
- the present invention is directed generally toward a workpiece handling system and method for handling workpieces, and an alignment apparatus and method for using same.
- the workpiece handling system comprises one or more workpiece transport containers configured to support a plurality of workpieces, and a front end module in selective engagement with the workpiece transport container(s).
- the front end module comprises a first robot having a first dual-workpiece handling arm operably coupled thereto, a second robot having a second dual-workpiece handling arm operably coupled thereto, and an alignment mechanism disposed generally therebetween.
- the alignment mechanism comprises a characterization device, an elevator mechanism, and two or more vertically-aligned workpiece supports configured to respectively selectively support two or more of the plurality of workpieces.
- the elevator mechanism is operable to both rotate and translate vertically with respect to an axis associated therewith, and the two or more workpiece supports are operable to translate radially with respect to the axis.
- the elevator mechanism is thus operable to individually vertically translate each workpiece from the respective workpiece supports to a characterization position, wherein the elevator mechanism is further operable to determine one or more characteristics of each of the plurality of workpieces at the characterization position, such as a rotational position and/or center of each workpiece via the rotation of the workpiece with respect to the characterization device.
- the system further comprises a vacuum chamber having a third robot and a fourth robot disposed therein, wherein the third robot comprises a first single-workpiece handling arm operably coupled thereto, and the fourth robot comprises a second single-workpiece handling arm operably coupled thereto.
- a processing module is further operably coupled to the vacuum chamber for processing the plurality of workpieces through a process medium, such as an ion beam.
- First and second load lock modules are operably coupled to both the front end module and the vacuum chamber, wherein each of the first and second load lock modules comprise two or more dual-workpiece load lock chambers configured to respectively support two or more workpieces therein.
- first, second, third, and fourth dual-workpiece load lock chambers are provided, wherein the first load lock module comprises the first and third load lock chambers, and the second load lock module comprises the second and fourth load lock chambers, wherein each of the first, second, third, and fourth load lock chambers are configured to support the two or more of the plurality of workpieces therein.
- the first robot is configured to selectively transfer one or more workpieces at a time (e.g., concurrently transfer two workpieces in parallel) between the workpiece transport container, the alignment mechanism, and the second load lock module via the first dual-workpiece handling arm.
- the second robot is further configured to selectively transfer one or more workpieces at a time (e.g., concurrently transfer two workpieces in parallel) between another workpiece transport container, the alignment mechanism, and the first load lock module via the second dual-workpiece handling arm.
- the third robot is configured to selectively serially transfer one workpiece at a time between the first load lock module and the process module via the first single-workpiece handling arm
- the fourth robot is configured to selectively serially transfer one workpiece at a time between the second load lock module and the process module via the second single-workpiece handling arm.
- a controller is further provided, wherein the controller is configured to selectively transfer the plurality of workpieces between the workpiece transport container, alignment mechanism, first and second load lock modules, and process module via a control of the first, second, third, and fourth robots, alignment mechanism, and first and second load lock modules.
- FIG. 1A illustrates a block diagram of an exemplary workpiece handling system in accordance with one aspect of the present invention.
- FIG. 1B illustrates the exemplary workpiece handling system of FIG. 1A having a reverse workpiece flow.
- FIG. 2 illustrates schematic of an exemplary workpiece handling system in accordance with another aspect of the present invention.
- FIG. 3A illustrates a perspective view of an exemplary alignment mechanism according to another aspect of the present invention.
- FIG. 3B illustrates a plan view of the exemplary alignment mechanism of FIG. 3A .
- FIGS. 4A-4F illustrate the exemplary alignment mechanism of FIGS. 3A and 3B during various stages of workpiece alignment according to another exemplary aspect of the invention.
- FIG. 5 is a partial cross-sectional view of the exemplary alignment mechanism of FIGS. 3A and 3B .
- FIG. 6 is a plan view of an exemplary workpiece on a workpiece support of an exemplary alignment mechanism.
- FIG. 7 is plot of a sensed position of a workpiece versus a rotational position of the workpiece support according to another exemplary aspect of the invention.
- FIG. 8 is a perspective view of an exemplary load lock module according to yet another aspect of the present invention.
- FIG. 9 illustrates another exemplary workpiece handling system according to still another aspect of the invention.
- FIG. 10A illustrates a bottom plan view of an exemplary dual-workpiece handling robot of FIG. 9 .
- FIG. 10B illustrates an elevation view of the exemplary dual-workpiece handling robot of FIG. 10A .
- FIG. 11 is a block timing diagram for handling workpieces according to another exemplary aspect of the invention.
- FIG. 12 is a block diagram illustrating an exemplary method for handling workpieces according to another exemplary aspect of the invention.
- FIG. 13 is a block diagram illustrating a continuation of the exemplary method of FIG. 12 for handling workpieces according to another aspect of the invention.
- the present invention is directed generally toward a workpiece handling system for semiconductor processes, and more particularly, to a handling system wherein two or more workpieces can be transferred within the system generally simultaneously, while still achieving serial operations such as alignment and ion implantation into the workpiece. Accordingly, the present invention will now be described with reference to the drawings, wherein like reference numerals may be used to refer to like elements throughout. It should be understood that the description of these aspects are merely illustrative and that they should not be interpreted in a limiting sense. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be evident to one skilled in the art, however, that the present invention may be practiced without these specific details.
- FIGS. 1A and 1B illustrate an exemplary workpiece handling system 100 in accordance with one exemplary aspect of the present invention.
- the workpiece handling system 100 comprises a front end module 102 , wherein the front end module comprises one or more load ports 104 A- 104 D operable to receive one or more workpiece transport containers 106 A- 106 D.
- Each of the load ports 104 A- 104 D for example, comprises a door 107 A- 107 D operable to provide selective communication between the respective workpiece transport containers 106 A- 106 D and the front end module 102 .
- the workpiece transport containers 106 A- 106 D for example, comprise Front Opening Unified Pods (FOUPs) 108 , wherein each FOUP is operable to interface with the front end module 102 .
- An internal environment 109 of the front end module 102 for example, is generally at or near atmospheric pressure.
- the front end module 102 comprises a first robot 110 and a second robot 112 , wherein, for example, the first robot is operable to load and unload a plurality of workpieces 114 (e.g., 300 mm semiconductor wafers) from the workpiece transport containers 106 A and 106 B, and the second robot is operable to load and unload a plurality of workpieces from the workpiece transport containers 106 C and 106 D.
- the first and second robots 110 and 112 are capable of multiple degrees of freedom including vertical, radial and azimuthal movements.
- the first robot 110 comprises a first dual-workpiece handling arm 116 operably coupled thereto, wherein the first dual-workpiece handling arm, for example, comprises a first dual support member 118 operable to support one or multiple workpieces 114 thereon.
- the first dual-workpiece handling arm 116 is configured to concurrently or generally simultaneously retrieve and replace two of the plurality of workpieces 114 from and to the workpiece transport containers 106 A and 106 B via a control of the first robot 110 .
- the first dual-workpiece handling arm 116 may be further operable to support a single workpiece 114 , as opposed to supporting multiple workpieces.
- the second robot 112 for example, comprises a second dual-workpiece handling arm 120 operably coupled thereto, wherein the second dual-workpiece handling arm is likewise configured to simultaneously retrieve and replace two of the plurality of workpieces 114 from and to the workpiece transport containers 106 C and 106 D via a control of the second robot.
- the second dual-workpiece handling arm 120 comprises a second dual support member 121 operable to support one or multiple workpieces 114 thereon.
- the second dual-workpiece handling arm 120 may be further operable to support a single workpiece 114 , as opposed to supporting multiple workpieces.
- the front end module 102 of the present invention as illustrated in FIGS. 1A-1B and FIG. 2 further comprises an alignment mechanism 122 disposed generally between the first and second robots 110 and 112 , wherein the alignment mechanism is operable to determine one or more characteristics of the plurality of workpieces 114 .
- FIG. 3A illustrates a perspective view of the exemplary alignment mechanism 122 , wherein two or more vertically-aligned workpiece tray stations 124 A and 124 B are provided, and wherein each of the tray stations further comprise two or more workpiece supports 126 associated therewith.
- the two or more workpiece supports 126 associated with each workpiece tray station 124 A and 124 B are operable to support a respective workpiece 114 , as illustrated in phantom in a top view 127 of the alignment mechanism 122 in FIG. 3B .
- the two or more workpiece tray stations 124 A and 124 B of FIG. 3A for example, further generally define two or more respective buffer positions 128 A and 128 B, wherein the two or more buffer positions provide a buffering or cueing of the plurality of workpieces 114 of FIGS. 1A-1B and FIG. 2 via the alignment mechanism 122 , as will be discussed in greater detail hereafter.
- the alignment mechanism 122 may comprise more than two workpiece tray stations 124 and buffer positions 128 , and such multiple workpiece tray stations and buffer positions are contemplated as falling within the scope of the present invention.
- each of the workpiece supports 126 associated with the respective workpiece tray stations 124 A and 124 B are further associated with a circumference or perimeter 130 of the plurality of workpieces 114 .
- the plurality of workpiece supports 126 are generally arcuate in shape, and have a recess 131 formed therein, wherein the recess is configured to generally support the workpiece 114 about at least a portion of its circumference 130 .
- the plurality of workpiece supports 126 may alternatively take a number of other forms, such as supporting posts or prongs (not shown). Accordingly, any member operable to support the workpiece 114 is contemplated as falling within the scope of the present invention.
- the plurality of workpiece supports 126 of the present example are further translationally coupled to a base 132 of the alignment mechanism 122 , wherein the plurality of workpiece supports are further operable to radially translate (as indicated by arrows 134 ) with respect to the workpiece 114 and the base. Accordingly, the plurality of workpiece supports 126 of each of the workpiece tray stations 124 A and 124 B are operable to translate between a retracted position 136 (as illustrated in FIG. 4A for workpiece tray station 124 A, and an extended position 137 (as illustrated in FIG. 4C for workpiece tray station 124 A).
- the workpiece tray stations 124 A and 124 B are individually configured such that their respective workpiece supports 126 may be selectively arranged to either support the workpiece 114 , or to generally permit the workpiece to move freely vertically with respect to the workpiece supports.
- the plurality of workpiece tray stations 124 A and 124 B are thus operable to selectively support each workpiece 114 A and 114 B illustrated in FIGS. 4A-4F , based on the respective plurality of workpiece supports being in the retracted position 136 or the extended position 137 , as will be further described infra.
- the alignment mechanism 122 further comprises an elevator device 138 operably coupled to the base 132 , wherein the elevator device is configured to individually vertically translate each of the two or more workpieces 114 A and 114 B (shown in FIGS. 4A-4F ) associated with the workpiece tray stations 124 A and 124 B.
- the alignment mechanism 122 and elevator device 138 of FIG. 3A are further illustrated in a cross-sectional view 139 in FIG. 5 , wherein the exemplary elevator device comprises an elevator shaft 140 operably coupled to an elevator workpiece support 142 .
- the elevator shaft 140 for example, is in linear sliding engagement with the base 132 , wherein the elevator workpiece support 142 is thus operable to selectively support each of the plurality of workpieces 114 A and 114 B (e.g., illustrated in FIGS. 4A-4F ) based on a presence or absence of the plurality of workpieces and position of the workpiece supports 126 of each tray station 124 A and 124 B.
- the elevator workpiece support 142 as illustrated in FIGS. 3A , 3 B, and 5 for example, comprises a vacuum chuck 144 , wherein one or more conduits 145 are operable to selectively provide a vacuum to a surface 146 of the vacuum chuck for selectively gripping each workpiece 114 .
- the elevator workpiece support 142 may comprise pins (not shown), or other mechanisms operable to selectively individually support each of the plurality of workpieces 114 A and 114 B of FIGS. 4A-4F .
- the elevator shaft 140 is configured to linearly translate along an axis 147 thereof, wherein, for example, the elevator shaft is operably coupled to a piston and cylinder assembly 148 .
- the piston and cylinder assembly 148 for example, is fluidly coupled to a pressure source (not shown), wherein the piston and cylinder assembly can be selectively actuated, such as by pneumatic pressure, as will be understood by one of ordinary skill in the art.
- the elevator shaft 140 can be operably coupled to a linear motor (not-shown), or other mechanism operable to selectively vertically translate the elevator shaft.
- FIGS. 4A-4F An exemplary operation of the elevator device 138 of the present invention is illustrated in FIGS. 4A-4F , wherein the elevator device is operable to individually translate the two or more workpieces 114 A and 114 B between the respective buffer positions 128 A and 128 B associated with each workpiece tray station 124 A and 124 B and a characterization position 150 (e.g., as illustrated in FIG. 4D ) for characterization of the respective workpieces.
- a characterization position 150 e.g., as illustrated in FIG. 4D
- each workpiece In order to translate the two or more workpieces 114 A and 114 B from each workpiece tray station 124 A and 124 B, each workpiece is generally lifted from the workpiece supports 126 when the respective workpiece tray station is in the retracted position 136 of 4 A, for example, therein generally permitting the workpiece supports of the respective tray station to be radially translated to the extended position 137 , such as illustrated in FIGS. 4C and 4F .
- the workpieces 124 A or 124 B may be vertically translated via the elevator device 138 to the characterization position 150 .
- a horizontal translation device 152 illustrated in FIG. 5 is operably coupled to each of the workpiece supports 126 of the respective workpiece tray stations 124 A and 124 B, wherein the horizontal translation device is operable to selectively radially translate the respective workpiece support(s) between the retracted position(s) 136 and the extended position(s) 137 of FIGS. 4A-4F .
- the extended position 137 illustrated in FIG. 4C associated with workpiece tray station 124 A for example, is located beyond the circumference 130 of the workpieces 114 A and 114 B.
- the elevator device 138 is therefore operable to solely support and vertically translate the respective workpiece 114 A and 114 B when the respective workpiece tray station 124 A and 124 B is in the extended position 137 .
- workpiece 114 A is illustrated generally residing on the workpiece supports 126 of workpiece tray station 124 A.
- the elevator device 138 is operable to linearly translate the elevator workpiece support 142 along the axis 147 , therein generally lifting and supporting the workpiece 114 A from the workpiece tray station 124 A, as illustrated in FIG. 4B .
- the workpiece supports may be extended beyond the circumference 130 of the workpiece 114 A to the extended position 137 via the horizontal translation device 152 , as illustrated in FIG. 4C .
- the workpiece 114 A can be then translated (e.g. raised or lowered along the axis 147 ) to the characterization position 150 , as illustrated in FIG. 4D , for characterization thereof via one or more characterization devices 154 .
- the characterization position 150 illustrated in FIGS. 4C and 4F in the present example is shown as being generally below the buffer position 128 A.
- a single characterization device 154 can be utilized for serial characterization of both workpieces 114 A and 114 B.
- the characterization position 150 can reside anywhere below the buffer position 128 B.
- additional characterization devices may be implemented, such that multiple characterization positions are possible both below and above buffer positions 128 A and 128 B, wherein workpieces 114 A and 114 B may be characterized, and all such characterization positions and number of characterization devices are contemplated as falling within the scope of the present invention.
- the one or more characterization devices 154 are operable to detect one or more characteristics associated with the plurality of workpieces 114 when each workpiece is at the characterization position 150 .
- the characterization devices 154 may comprise one or more of an optical sensor 156 , a camera 157 (illustrated in FIG. 3B ), or various other detection devices, wherein the one or more characterization devices are operable to detect the one or more characteristics associated with the plurality of workpieces 114 when each workpiece is at the characterization position 150 of FIGS. 4D and 4F .
- the optical sensor 156 for example, is operable to detect a notch 158 in the workpiece (illustrated in FIG. 6 ), as will be described in greater detail hereafter.
- the one or more characteristics may further comprise a position of the workpiece 114 with respect to the elevator workpiece support 142 , various indicia (not shown) associated with the workpiece, such as lot number, etc., or various other indicia or characteristics associated with the workpiece.
- the workpiece 114 A can be removed from the alignment mechanism 122 after characterization thereof (e.g., via the first robot 110 or second robot 112 of FIGS. 1A , 1 B, or 2 ), and the elevator device 138 can then generally lift and support the workpiece 114 B from the plurality of workpiece supports 126 of workpiece tray station 124 B, as illustrated in FIG. 4E .
- the workpiece supports Once raised from the plurality of workpiece supports 126 of tray station 124 B, the workpiece supports may be likewise extended beyond the circumference 130 of the workpiece 114 B to the extended position 137 of FIG. 4F , and the workpiece 114 B can be then translated (e.g. lowered) to the characterization position 150 for characterization thereof.
- the workpiece 114 B may then be removed from the alignment mechanism 122 via the first robot 110 or second robot 112 of FIGS. 1A-1B or FIG. 2 for subsequent processing.
- the elevator device 138 is further rotationally coupled to the base 132 , wherein the alignment mechanism is operable to individually rotate the plurality of workpieces 114 about the axis 147 associated with the elevator shaft 140 of FIG. 5 .
- a rotation device 160 such as a servo motor may be operably coupled to the elevator shaft 140 , wherein the rotation device is operable to rotate the elevator shaft about the axis 147 (e.g., illustrated as arcuate arrow 161 in FIG. 3B ).
- the alignment mechanism 122 is configured to further determine a position of the notch 158 (illustrated in FIG. 3B ), such as for alignment of the workpiece with respect to the alignment mechanism, via the rotation of the workpiece through a beamline 162 of the optical sensor 156 .
- the determined position of the notch 158 may be utilized to orient the workpiece 114 with respect to the alignment mechanism 122 via further rotation of the elevator shaft, for example, for subsequent processing.
- the characterization device 154 may be further utilized to determine a center 163 of the workpiece 114 , as illustrated in FIG. 6 , with respect to the rotational axis 147 of the elevator workpiece support 142 via an examination of an output from the characterization device during the rotation 161 .
- FIG. 7 illustrates a plot 164 of a rotational position 165 (e.g., provided by the servo motor of the rotation device 160 ) of the elevator shaft 140 and elevator workpiece support 142 of FIG.
- an offset vector value associated with the center 163 of the workpiece 114 can be provided to the first robot 110 and/or the second robot 112 of FIGS. 1A , 1 B, and 2 , wherein, in the present example, the second robot is configured to pick the workpiece 114 from the alignment mechanism 122 based on the offset vector value, and wherein the workpiece is generally centered with respect to the second dual support member 121 when it is picked from alignment mechanism.
- the rotational position of the workpiece 114 can be further determined from the sensor signal 166 of FIG. 7 , wherein the workpiece can be further rotationally aligned with respect to the alignment mechanism 122 prior to being picked by the first or second robots 110 or 112 of FIGS. 1A , 1 B, and 2 .
- the workpiece handling system 100 further comprises a first load lock module 168 and a second load lock module 170 operably coupled to the front end module 102 , wherein the plurality of workpieces 114 may be transferred in series or in parallel between the front end module and the first or second load lock modules.
- a first load lock chamber 171 , a second load lock chamber 172 , a third load lock chamber 173 , and a fourth load lock chamber 174 are further provided, wherein in the present example, the first load lock module 168 comprises the first load lock chamber and the third load lock chamber, and wherein the first and third load lock chambers are generally vertically stacked upon one another, as illustrated in FIG. 8 .
- the second load lock module 170 of FIGS. 1A-1B comprises the second load lock chamber 172 and the fourth load lock chamber 174 , wherein the second and fourth load lock chambers are further generally vertically stacked upon one another.
- the first load lock module 168 illustrated in FIG. 8 can be further considered to be representative second load lock module 170 of FIGS. 1A-1B , wherein similar features may be present in the first and second load lock modules.
- each of the first, second, third, and fourth load lock chambers 171 , 172 , 173 , and 174 are further operable to support two or more workpieces 114 therein.
- Each of the first, second, third, and fourth load lock chambers 171 , 172 , 173 , and 174 comprise a first isolation valve 175 associated with the front end module 102 , wherein the first isolation valve selectively fluidly couples an internal volume 176 of the respective load lock chamber to the internal environment 109 of the front end module.
- each respective internal volume 176 of the first, second, third, and fourth load lock chambers 171 , 172 , 173 , and 174 is further generally separated into first and second volumes 177 A and 177 B, as illustrated in the exemplary first load lock module 168 FIG. 8 .
- a mechanical isolation plate (not shown) is generally disposed between the first and second volumes 177 A and 177 B, wherein the first volume is configured to generally confine one of the plurality of workpieces 114 A, and wherein the second volume is configured to generally confine another one of the plurality of workpieces 114 B.
- the mechanical isolation plate (not shown), for example, generally prevents cross-contamination between the first volume 177 A and the second volume 177 B within each respective internal volume 176 .
- the workpiece handling system 100 of FIGS. 1A-1B of the present invention further comprises a vacuum module 180 operably coupled to the first and second load lock modules 168 and 170 , wherein the vacuum module comprises a generally evacuated internal environment 181 .
- the vacuum module comprises a generally evacuated internal environment 181 .
- one or more high vacuum pumps may be operably coupled to the vacuum module 180 , therein generally evacuating the vacuum module.
- each of the first, second, third, and fourth load lock chambers 171 , 172 , 173 , and 174 comprise a second isolation valve. 182 associated with the vacuum module 180 (e.g., illustrated in FIG. 8 with respect to the first load lock module 168 ), wherein the second isolation valve selectively fluidly couples the internal volume 176 of the respective load lock chamber to the evacuated internal environment 181 of the vacuum module.
- the vacuum module 180 of FIGS. 1A-1B is further operably coupled to a processing module 184 , such as an ion implanter 185 operable to form an ion beam 186 .
- the processing module 184 may comprise an electrostatic chuck 188 disposed therein, wherein the electrostatic chuck is configured to individually selectively support the one or more workpieces 114 .
- the processing module 184 may further comprise a processing robot 190 configured to translate the electrostatic chuck 188 through a process medium 192 , such as the ion beam 186 from the ion implanter 186 for implanting ions into the plurality of workpieces 114 .
- the processing module 184 may further comprise a dosimetry system (not shown).
- the vacuum module 180 comprises a third robot 194 and a fourth robot 196 disposed therein, wherein each of the third and fourth robots, for example, are capable of multiple degrees of freedom including vertical, radial and azimuthal movements.
- the third robot 194 for example, comprises a first single-workpiece handling arm 198 operably coupled thereto
- the fourth robot 196 comprises a second single-workpiece handling arm 200 operably coupled thereto, wherein the first and second single-workpiece handling arms are each operable to support a single workpiece 114 .
- the workpiece handling system 100 is selectively configured to transfer two or more of the plurality of workpieces 114 in parallel (e.g., illustrated as dashed arrows 204 ) as well as one at a time or serially (e.g., illustrated as solid arrows 206 ), based on a desired flow of the workpieces through the system.
- the first robot 110 for example, is configured to selectively transfer two or more workpieces 114 at a time between the workpiece transport containers 106 A and 106 B, the alignment mechanism 122 , and the second load lock module 170 via the first dual-workpiece handling arm 116 .
- the second robot 112 is further configured to selectively transfer the two or more workpieces between the workpiece transport containers 106 C and 106 D, the alignment mechanism 122 , and the first load lock module 168 via the second dual-workpiece handling arm 120 .
- the second dual-workpiece handling arm 120 is further configured to serially pick workpieces 114 A and 114 B from the alignment mechanism 122 (e.g., from the characterization, position 150 of FIGS. 5D and 5F ), and then transfer both workpieces in parallel to the second load lock module 170 .
- FIG. 1A illustrates a counter-clockwise flow 208 for servicing workpiece transport containers 106 A and 106 B
- FIG. 1B illustrates a clockwise flow 210 for servicing workpiece transport containers 106 C and 106 D.
- the third and fourth robots 194 and 196 are operable to serially transfer one workpiece 114 at a time between the process module 184 and the respective first load lock module 168 and second load lock module 170 .
- the first and second isolation valves 175 and 182 associated with each of the first, second, third, and fourth load lock chambers 171 , 172 , 173 , and 174 are operable to open and close independently;
- two workpieces 114 residing within the first load lock chamber 171 may be pumped down to vacuum or vented while another two workpieces may be independently vented to atmosphere or pumped down to vacuum in the third load lock chamber 173 of the first load lock module 168 .
- two workpieces 114 residing within the second load lock chamber 172 may be pumped down to vacuum or vented while another two workpieces may be independently vented to atmosphere or pumped down to vacuum in the fourth load lock chamber 174 of the second load lock module 170 .
- serial operations such as alignment of the plurality of workpieces 114 and processing of the workpieces through the process medium 192 may be performed while other parallel (e.g., generally simultaneous) transfers of multiple workpieces are concurrently performed elsewhere in the system.
- a controller 212 is further provided to control sequencing of workpieces through the system 100 and to control activation, deactivation and overall coordination of mechanical and environmental operations during workpiece handling and processing.
- the controller is configured to control the front end module 102 , the first and second load lock modules 168 and 170 , the vacuum module 180 , the processing module 184 , and all components and environmental operations associated therewith.
- Environmental operations may comprise control of vent and pump down operations for each of the load lock chambers 171 , 172 , 173 , and 174 and control of the vacuum environment 181 in the vacuum module 180 .
- Mechanical operations may comprise instructing the alignment mechanism 122 , workpiece transport containers 106 , the first, second, third, and fourth robots 110 , 112 , 194 , and 196 and various other workpiece handling and control of various mechanical devices associated with the system 100 .
- the controller 212 may comprise multiple individual controllers (not shown) associated with various components of the system, or may be a single controller for the whole system 100 , and all such controllers are contemplated as falling within the scope of the present invention.
- FIG. 9 illustrates another exemplary system 213 of the invention, wherein the first dual workpiece handling arm 116 associated with the first robot 110 comprises a first pair of articulated arms 214 A and 214 B, wherein each of the first pair of articulated arms comprise a first single support member 216 configured to support a single workpiece 114 .
- the second dual workpiece handling arm 120 associated with the second robot 112 further comprises a second pair of articulated arms 218 A and 218 B, wherein each of the second pair of articulated arms comprise a second single support member 220 configured to support a single workpiece 114 .
- the first pair of articulated arms 214 A and 214 B can be configured to individually (e.g., in series) or concurrently (e.g., in parallel) transfer two or more of the workpieces 114 between the workpiece transport containers 106 A and 106 B, the second load lock module 170 , and the alignment mechanism 122 , in a similar manner as the first dual workpiece support member 116 of FIGS. 1A-1B .
- FIGS. 10A and 10B illustrate several views of an exemplary robot 222 .
- the first robot 110 and/or second robot 112 of FIGS. 1A-1B , 2 , and/or 9 may comprise the robot 222 shown in FIGS. 10A and 10B . As illustrated in FIGS.
- the robot 222 comprises articulated arms 224 A and 224 B, wherein each articulated arm respectively comprises a single support member 226 A and 226 B operably coupled thereto. Accordingly, the robot 222 is operable to translate the single support members 226 A and 226 B independently or in unison, based on the desired transfer of workpiece(s) as discussed above.
- FIG. 11 illustrates an exemplary timing diagram 300 for transferring a plurality of workpieces (e.g., eight workpieces) in a workpiece handling system associated with an ion implantation system.
- the system 100 illustrated in FIGS. 1A , 1 B, and 2 , and the system 213 illustrated in FIG. 9 can be operated in accordance with the timing diagram 300 of FIG. 11 .
- FIG. 11 illustrates an exemplary timing diagram 300 for transferring a plurality of workpieces (e.g., eight workpieces) in a workpiece handling system associated with an ion implantation system.
- FIG. 1A , 1 B, and 2 can be operated in accordance with the timing diagram 300 of FIG. 11 .
- first hatching 302 depicts acts associated both the first workpiece and second workpiece being performed concurrently
- second hatching 303 depicts acts associated with only the first workpiece (e.g., serially)
- third hatching 304 depicts acts associated with only the second workpiece (e.g., serially). It is noted that acts performed on other workpieces are illustrated as having no hatching, and that such acts can be performed concurrently (in parallel) or in series with the acts associated with first and/or second workpieces
- a method 305 for transferring workpieces in a semiconductor processing system is illustrated in FIG.
- timing diagram 300 of FIG. 11 may be further referenced.
- exemplary methods are illustrated and described herein as a series of acts or events, it will be appreciated that the present invention is not limited by the illustrated ordering of such acts or events, as some steps may occur in different orders and/or concurrently with other steps apart from that shown and described herein, in accordance with the invention.
- not all illustrated steps may be required to implement a methodology in accordance with the present invention.
- the methods may be implemented in association with the systems illustrated and described herein as well as in association with other systems not illustrated.
- the method 305 begins at act 310 , wherein a first workpiece and a second workpiece are generally concurrently removed (e.g., removed in parallel) from a first workpiece transport container by a first robot.
- the first and second workpieces are then generally concurrently placed on an alignment mechanism via the first robot in act 312 .
- the first workpiece is then aligned and/or characterized in act 314 .
- the first workpiece is raised from a first workpiece support of the alignment mechanism via an elevator device.
- the first workpiece is further vertically translated to a characterization position, wherein the first workpiece is generally characterized, such as determining a position of a notch in the workpiece, identifying the workpiece, and/or determining a spatial orientation of the workpiece with respect to the alignment mechanism.
- the first workpiece is then removed from the alignment mechanism via a second robot in act 316 .
- the second workpiece is then aligned and/or characterized in act 318 .
- the second workpiece is raised from a second workpiece support of the alignment mechanism via the elevator device and then translated to the characterization position, wherein the second workpiece is characterized.
- the second workpiece is then removed from the alignment mechanism via the second robot in act 320 , wherein the second robot is now generally supporting the first and second workpieces.
- the first and second workpieces are placed into a first load lock chamber in parallel in act 322 via the second robot, and the first load lock chamber is generally evacuated in act 324 .
- the first workpiece is removed from first load lock chamber via a third robot and placed in a process chamber (e.g., placed on an electrostatic chuck in the process chamber).
- the first workpiece is subjected to a process medium, such as an ion beam associated with an ion implanter, in act 328 , wherein ions are implanted into the first workpiece.
- a process medium such as an ion beam associated with an ion implanter
- the second workpiece is removed from the first load lock chamber and placed in the process chamber via the third robot in act 332 , wherein the second workpiece is implanted with ions in act 334 .
- the second workpiece is removed from the process chamber via the fourth robot and placed in the second load lock chamber in act 336 .
- the first and second workpieces are serially transported from the first load lock chamber to the process chamber for processing by the third robot, and serially transferred from the process chamber to the second load lock chamber by the fourth robot.
- the second load lock chamber is vented to generally atmospheric pressure, and the first and second workpieces are removed from the second load lock chamber in parallel via the first robot in act 340 .
- the first and second workpieces are placed in a second workpiece transport container.
- the first workpiece transport container and the second workpiece transport container can be the same workpiece transport container.
- Acts 310 through 342 can be further repeated for third and fourth workpieces, fifth and sixth workpieces, etc., as illustrated in the timing diagram 300 of FIG. 11 .
- FIG. 13 illustrates a continuation of the method 305 of FIG. 12 , wherein the third and fourth workpieces are generally concurrently removed from the first workpiece transport container by the first robot in act 344 , at least partially concurrently with act 322 of FIG. 12 .
- the third and fourth workpieces are then placed in parallel on the alignment mechanism via the first robot in act 346 of FIG. 13 .
- the third workpiece is then aligned in act 348 and removed from the alignment mechanism via the second robot in act 350 .
- the fourth workpiece is then aligned in act 352 , and the fourth workpiece is then removed from the alignment mechanism via the second robot in act 354 , wherein the second robot is now generally supporting the third and fourth workpieces.
- the third and fourth workpieces are placed into a third load lock chamber in parallel in act 356 via the second robot, and the third load lock chamber is generally evacuated in act 358 .
- the third workpiece is removed from third load lock chamber via the third robot and placed in the process chamber via the third robot. Ions are then implanted into the third workpiece in act 362 , and the third workpiece is removed from the process chamber via the fourth robot and placed in a fourth load lock chamber in act 364 .
- the fourth workpiece is removed from the third load lock chamber and placed in the process chamber via the third robot in act 366 , wherein the fourth workpiece is implanted with ions in act 368 .
- the fourth workpiece is removed from the process chamber via the fourth robot and placed in the fourth load lock chamber in act 370 .
- the third and fourth workpieces are serially transported from the third load lock chamber to the process chamber for processing by the third robot, and serially transferred from the process chamber to the fourth load lock chamber by the fourth robot.
- the fourth load lock chamber is vented to generally atmospheric pressure, and the third and fourth workpieces are removed from the fourth load lock chamber in parallel via the first robot in act 374 .
- the third and fourth workpieces are placed back in the first workpiece transport container or the second workpiece transport container.
- various acts are performed at least partially concurrently with other acts.
- acts 348 , 350 , 352 , 354 , and 376 of FIG. 13 are performed at least partially concurrently with act 324 of FIG. 12 .
- acts 326 , 328 , 330 , and 332 are performed at least partially concurrently with acts 354 and 358 of FIG. 13 .
- Acts 318 , 320 , and 322 of FIG. 12 for example, can be performed at least partially concurrently with acts 344 , 346 , and 372 of FIG. 13
- acts 362 , 364 , 366 , and 368 can be performed at least partially concurrently with act 338 .
- more acts may be concurrently performed, as illustrated in the timing diagram 300 of FIG. 11 , and all such concurrencies are contemplated as falling within the scope of the present invention.
- load lock chambers may operate in a sequential manner such that at a given point in time one load lock is open to the vacuum module, one load lock chamber is open to the front end module, one load lock chamber is venting to atmosphere, and one load lock chamber is pumping down to vacuum. Accordingly, each of the first, second, third, and fourth load lock chambers go through a sequence generally repetitively, recommencing the full cycle at generally equally phased intervals.
- the present invention provides for a reduced cost of ownership of the processing system (e.g., an ion implantation system) by efficiently transferring workpieces between atmospheric and vacuum environments.
- the processing system e.g., an ion implantation system
Abstract
An ion implantation apparatus, system, and method are provided for transferring a plurality of workpieces between vacuum and atmospheric pressures, wherein an alignment mechanism is operable to align a plurality of workpieces for generally simultaneous transportation to a dual-workpiece load lock chamber. The alignment mechanism comprises a characterization device, an elevator, and two vertically-aligned workpiece supports for supporting two workpieces. First and second atmospheric robots are configured to generally simultaneously transfer two workpieces at a time between load lock modules, the alignment mechanism, and a FOUP. Third and fourth vacuum robots are configured to transfer one workpiece at a time between the load lock modules and a process module.
Description
- The present invention relates generally to workpiece processing systems and methods for processing workpieces, and more specifically to a system and method for handling workpieces wherein throughput is maximized.
- In semiconductor processing, many operations may be performed on a single workpiece or semiconductor wafer. In general, each processing operation on a workpiece is typically performed in a particular order, wherein each operation waits until completion of a preceding operation, thus affecting the time at which the workpiece will become available for a subsequent processing step. Tool productivity or throughput for relatively short processes performed under vacuum, such as ion implantation, can be severely limited if the process flow leading to the processing location is interrupted by sequential events associated with such processing. For example, operations such as an exchange of workpieces between transport carriers or storage cassettes and the processing system, a transfer of the workpiece from an atmospheric environment into an evacuated environment of an implantation chamber of the processing system, and an orientation of the workpiece (e.g., notch alignment) within the evacuated environment, can have a significant impact on tool productivity.
- Processing of a workpiece, such as ion implantation, for example, is typically performed at a reduced pressure within an implantation chamber, wherein ions are generally accelerated along a beam line, and wherein the ions enter the evacuated implantation chamber and strike the workpiece in a predetermined manner. Several operations are typically performed leading up to the implantation in order to introduce the workpiece into the implantation chamber, as well as to properly position and orient the workpiece with respect to the ion beam within the ion implantation chamber. For example, the workpiece is transferred via a robot from an atmospheric cassette or storage device into a load lock chamber, wherein the load lock chamber is subsequently evacuated in order to bring the workpiece into the processing environment of the ion implanter. The cassette or storage device, for example, may be delivered to the ion implanter via a conveyor system or other type of delivery.
- Front opening unified pods (FOUPs), for example, have become a popular mechanism for moving silicon workpieces or wafers from one workstation to another in an integrated circuit (IC) fabrication facility. Different versions of these FOUPs are commercially available from different manufacturers, including Asyst Technologies and Brooks Automation. A FOUP containing a number of stacked wafers, for example, is delivered from one tool to a next subsequent tool by an automated delivery device such as an overhead transport. The overhead transport deposits the pod to a location within the reach of a robot so that a robotic arm can extract one or more silicon wafers from the pod for treatment.
- U.S. Pat. No. 5,486,080 to Sieradzki, for example; details a system for transferring wafers for vacuum processing. The system employs two wafer transport robots for moving wafers from two load locks past a processing station. Additional patents relating to serial end stations are U.S. Pat. Nos. 6,350,097, 6,555,825, and 5,003,183. Further, commonly-owned U.S. Pat. No. 7,010,388 to Mitchell et al. details a wafer handling system for handling one or two wafers at a time.
- It is desirable for the workpiece handling system to have very high throughputs in order to reduce the tool's cost of ownership. This is especially true in an ion implantation process when a duration of the implantation is very short compared to the time needed to transfer a new workpiece from the FOUP to the process chamber and back to the FOUP. The actual ion implantation into a workpiece for a low dose implant, for example, has a short duration, wherein implant times can be less than 5 seconds. Further, as part of pre-processing routines utilized in ion implantation, each workpiece must be oriented properly relative to the ion beam. A mechanism known as an aligner is used for such an alignment step, where each workpiece is aligned serially, thus potentially decreasing throughput.
- Therefore, a need exists for a system and method for facilitating high throughput by allowing simultaneous placement of two workpieces by an atmospheric wafer handling robot at the aligner station for subsequent serial alignment by the aligner mechanism. Since two wafers can be dropped off simultaneously, the atmospheric wafer handling robot can proceed onto other tasks which allow the wafer robot to handle more wafers per hour.
- The present invention overcomes the limitations of the prior art by providing a system, apparatus, and method for transferring workpieces between atmospheric and vacuum environments, while maximizing throughput and minimizing costs of ownership associated with the systems. More particularly, the present invention provides a system and method for reducing a cost of ownership of the system by minimizing an idle time, or the amount of time a processing system is operating but not producing a processed workpiece.
- Accordingly, the following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the invention. It is intended to neither identify key or critical elements of the invention nor delineate the scope of the invention. Its purpose is to present some concepts of the invention in a simplified form as a prelude to the more detailed description that is presented later.
- The present invention is directed generally toward a workpiece handling system and method for handling workpieces, and an alignment apparatus and method for using same. In accordance with one exemplary aspect of the invention, the workpiece handling system comprises one or more workpiece transport containers configured to support a plurality of workpieces, and a front end module in selective engagement with the workpiece transport container(s). In one example, the front end module comprises a first robot having a first dual-workpiece handling arm operably coupled thereto, a second robot having a second dual-workpiece handling arm operably coupled thereto, and an alignment mechanism disposed generally therebetween. The alignment mechanism comprises a characterization device, an elevator mechanism, and two or more vertically-aligned workpiece supports configured to respectively selectively support two or more of the plurality of workpieces. The elevator mechanism is operable to both rotate and translate vertically with respect to an axis associated therewith, and the two or more workpiece supports are operable to translate radially with respect to the axis. The elevator mechanism is thus operable to individually vertically translate each workpiece from the respective workpiece supports to a characterization position, wherein the elevator mechanism is further operable to determine one or more characteristics of each of the plurality of workpieces at the characterization position, such as a rotational position and/or center of each workpiece via the rotation of the workpiece with respect to the characterization device.
- The system further comprises a vacuum chamber having a third robot and a fourth robot disposed therein, wherein the third robot comprises a first single-workpiece handling arm operably coupled thereto, and the fourth robot comprises a second single-workpiece handling arm operably coupled thereto. A processing module is further operably coupled to the vacuum chamber for processing the plurality of workpieces through a process medium, such as an ion beam. First and second load lock modules are operably coupled to both the front end module and the vacuum chamber, wherein each of the first and second load lock modules comprise two or more dual-workpiece load lock chambers configured to respectively support two or more workpieces therein. For example, first, second, third, and fourth dual-workpiece load lock chambers are provided, wherein the first load lock module comprises the first and third load lock chambers, and the second load lock module comprises the second and fourth load lock chambers, wherein each of the first, second, third, and fourth load lock chambers are configured to support the two or more of the plurality of workpieces therein.
- In accordance with one exemplary aspect, the first robot is configured to selectively transfer one or more workpieces at a time (e.g., concurrently transfer two workpieces in parallel) between the workpiece transport container, the alignment mechanism, and the second load lock module via the first dual-workpiece handling arm. The second robot is further configured to selectively transfer one or more workpieces at a time (e.g., concurrently transfer two workpieces in parallel) between another workpiece transport container, the alignment mechanism, and the first load lock module via the second dual-workpiece handling arm. The third robot is configured to selectively serially transfer one workpiece at a time between the first load lock module and the process module via the first single-workpiece handling arm, and the fourth robot is configured to selectively serially transfer one workpiece at a time between the second load lock module and the process module via the second single-workpiece handling arm. A controller is further provided, wherein the controller is configured to selectively transfer the plurality of workpieces between the workpiece transport container, alignment mechanism, first and second load lock modules, and process module via a control of the first, second, third, and fourth robots, alignment mechanism, and first and second load lock modules.
- To the accomplishment of the foregoing and related ends, the invention comprises the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative embodiments of the invention. These embodiments are indicative, however, of a few of the various ways in which the principles of the invention may be employed. Other objects, advantages and novel features of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the drawings.
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FIG. 1A illustrates a block diagram of an exemplary workpiece handling system in accordance with one aspect of the present invention. -
FIG. 1B illustrates the exemplary workpiece handling system ofFIG. 1A having a reverse workpiece flow. -
FIG. 2 illustrates schematic of an exemplary workpiece handling system in accordance with another aspect of the present invention. -
FIG. 3A illustrates a perspective view of an exemplary alignment mechanism according to another aspect of the present invention. -
FIG. 3B illustrates a plan view of the exemplary alignment mechanism ofFIG. 3A . -
FIGS. 4A-4F illustrate the exemplary alignment mechanism ofFIGS. 3A and 3B during various stages of workpiece alignment according to another exemplary aspect of the invention. -
FIG. 5 is a partial cross-sectional view of the exemplary alignment mechanism ofFIGS. 3A and 3B . -
FIG. 6 is a plan view of an exemplary workpiece on a workpiece support of an exemplary alignment mechanism. -
FIG. 7 is plot of a sensed position of a workpiece versus a rotational position of the workpiece support according to another exemplary aspect of the invention. -
FIG. 8 is a perspective view of an exemplary load lock module according to yet another aspect of the present invention. -
FIG. 9 illustrates another exemplary workpiece handling system according to still another aspect of the invention. -
FIG. 10A illustrates a bottom plan view of an exemplary dual-workpiece handling robot ofFIG. 9 . -
FIG. 10B illustrates an elevation view of the exemplary dual-workpiece handling robot ofFIG. 10A . -
FIG. 11 is a block timing diagram for handling workpieces according to another exemplary aspect of the invention. -
FIG. 12 is a block diagram illustrating an exemplary method for handling workpieces according to another exemplary aspect of the invention. -
FIG. 13 is a block diagram illustrating a continuation of the exemplary method ofFIG. 12 for handling workpieces according to another aspect of the invention. - The present invention is directed generally toward a workpiece handling system for semiconductor processes, and more particularly, to a handling system wherein two or more workpieces can be transferred within the system generally simultaneously, while still achieving serial operations such as alignment and ion implantation into the workpiece. Accordingly, the present invention will now be described with reference to the drawings, wherein like reference numerals may be used to refer to like elements throughout. It should be understood that the description of these aspects are merely illustrative and that they should not be interpreted in a limiting sense. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be evident to one skilled in the art, however, that the present invention may be practiced without these specific details.
- Referring now to the figures,
FIGS. 1A and 1B illustrate an exemplaryworkpiece handling system 100 in accordance with one exemplary aspect of the present invention. Theworkpiece handling system 100, for example, comprises afront end module 102, wherein the front end module comprises one ormore load ports 104A-104D operable to receive one or moreworkpiece transport containers 106A-106D. Each of theload ports 104A-104D, for example, comprises adoor 107A-107D operable to provide selective communication between the respectiveworkpiece transport containers 106A-106D and thefront end module 102. Theworkpiece transport containers 106A-106D, for example, comprise Front Opening Unified Pods (FOUPs) 108, wherein each FOUP is operable to interface with thefront end module 102. Aninternal environment 109 of thefront end module 102, for example, is generally at or near atmospheric pressure. - The
front end module 102 comprises afirst robot 110 and asecond robot 112, wherein, for example, the first robot is operable to load and unload a plurality of workpieces 114 (e.g., 300 mm semiconductor wafers) from theworkpiece transport containers workpiece transport containers second robots - As illustrated in greater detail in
FIG. 2 , in accordance with the present invention, thefirst robot 110 comprises a first dual-workpiece handling arm 116 operably coupled thereto, wherein the first dual-workpiece handling arm, for example, comprises a firstdual support member 118 operable to support one ormultiple workpieces 114 thereon. For example, the first dual-workpiece handling arm 116 is configured to concurrently or generally simultaneously retrieve and replace two of the plurality ofworkpieces 114 from and to theworkpiece transport containers first robot 110. The first dual-workpiece handling arm 116, for example, may be further operable to support asingle workpiece 114, as opposed to supporting multiple workpieces. Thesecond robot 112, for example, comprises a second dual-workpiece handling arm 120 operably coupled thereto, wherein the second dual-workpiece handling arm is likewise configured to simultaneously retrieve and replace two of the plurality ofworkpieces 114 from and to theworkpiece transport containers workpiece handling arm 120 comprises a seconddual support member 121 operable to support one ormultiple workpieces 114 thereon. In a similar manner to the first dual-workpiece handling arm 116, the second dual-workpiece handling arm 120 may be further operable to support asingle workpiece 114, as opposed to supporting multiple workpieces. - The
front end module 102 of the present invention, as illustrated inFIGS. 1A-1B andFIG. 2 further comprises analignment mechanism 122 disposed generally between the first andsecond robots workpieces 114.FIG. 3A illustrates a perspective view of theexemplary alignment mechanism 122, wherein two or more vertically-alignedworkpiece tray stations workpiece tray station respective workpiece 114, as illustrated in phantom in atop view 127 of thealignment mechanism 122 inFIG. 3B . The two or moreworkpiece tray stations FIG. 3A , for example, further generally define two or morerespective buffer positions workpieces 114 ofFIGS. 1A-1B andFIG. 2 via thealignment mechanism 122, as will be discussed in greater detail hereafter. It should be noted that thealignment mechanism 122 may comprise more than twoworkpiece tray stations 124 and buffer positions 128, and such multiple workpiece tray stations and buffer positions are contemplated as falling within the scope of the present invention. - In the present example, as illustrated in
FIG. 3B , each of the workpiece supports 126 associated with the respectiveworkpiece tray stations perimeter 130 of the plurality ofworkpieces 114. For example, the plurality of workpiece supports 126 are generally arcuate in shape, and have arecess 131 formed therein, wherein the recess is configured to generally support theworkpiece 114 about at least a portion of itscircumference 130. The plurality of workpiece supports 126 may alternatively take a number of other forms, such as supporting posts or prongs (not shown). Accordingly, any member operable to support theworkpiece 114 is contemplated as falling within the scope of the present invention. - The plurality of workpiece supports 126 of the present example are further translationally coupled to a
base 132 of thealignment mechanism 122, wherein the plurality of workpiece supports are further operable to radially translate (as indicated by arrows 134) with respect to theworkpiece 114 and the base. Accordingly, the plurality of workpiece supports 126 of each of theworkpiece tray stations FIG. 4A forworkpiece tray station 124A, and an extended position 137 (as illustrated inFIG. 4C forworkpiece tray station 124A). Theworkpiece tray stations workpiece 114, or to generally permit the workpiece to move freely vertically with respect to the workpiece supports. The plurality ofworkpiece tray stations workpiece FIGS. 4A-4F , based on the respective plurality of workpiece supports being in the retractedposition 136 or theextended position 137, as will be further described infra. - As illustrated in
FIG. 3A , thealignment mechanism 122 further comprises anelevator device 138 operably coupled to thebase 132, wherein the elevator device is configured to individually vertically translate each of the two ormore workpieces FIGS. 4A-4F ) associated with theworkpiece tray stations alignment mechanism 122 andelevator device 138 ofFIG. 3A are further illustrated in across-sectional view 139 inFIG. 5 , wherein the exemplary elevator device comprises anelevator shaft 140 operably coupled to anelevator workpiece support 142. Theelevator shaft 140, for example, is in linear sliding engagement with thebase 132, wherein theelevator workpiece support 142 is thus operable to selectively support each of the plurality ofworkpieces FIGS. 4A-4F ) based on a presence or absence of the plurality of workpieces and position of the workpiece supports 126 of eachtray station - The
elevator workpiece support 142, as illustrated inFIGS. 3A , 3B, and 5 for example, comprises avacuum chuck 144, wherein one ormore conduits 145 are operable to selectively provide a vacuum to asurface 146 of the vacuum chuck for selectively gripping eachworkpiece 114. As an alternative, theelevator workpiece support 142 may comprise pins (not shown), or other mechanisms operable to selectively individually support each of the plurality ofworkpieces FIGS. 4A-4F . - As illustrated in
FIG. 5 , theelevator shaft 140 is configured to linearly translate along anaxis 147 thereof, wherein, for example, the elevator shaft is operably coupled to a piston andcylinder assembly 148. The piston andcylinder assembly 148, for example, is fluidly coupled to a pressure source (not shown), wherein the piston and cylinder assembly can be selectively actuated, such as by pneumatic pressure, as will be understood by one of ordinary skill in the art. Alternatively, theelevator shaft 140 can be operably coupled to a linear motor (not-shown), or other mechanism operable to selectively vertically translate the elevator shaft. - An exemplary operation of the
elevator device 138 of the present invention is illustrated inFIGS. 4A-4F , wherein the elevator device is operable to individually translate the two ormore workpieces respective buffer positions workpiece tray station FIG. 4D ) for characterization of the respective workpieces. In order to translate the two ormore workpieces workpiece tray station position 136 of 4A, for example, therein generally permitting the workpiece supports of the respective tray station to be radially translated to theextended position 137, such as illustrated inFIGS. 4C and 4F . Once therespective tray station 124A and/or 124B are in theextended position 137, theworkpieces elevator device 138 to thecharacterization position 150. - According to one example, a
horizontal translation device 152 illustrated inFIG. 5 is operably coupled to each of the workpiece supports 126 of the respectiveworkpiece tray stations FIGS. 4A-4F . Theextended position 137 illustrated inFIG. 4C associated withworkpiece tray station 124A, for example, is located beyond thecircumference 130 of theworkpieces elevator device 138 is therefore operable to solely support and vertically translate therespective workpiece workpiece tray station extended position 137. - Referring again to
FIG. 4A ,workpiece 114A is illustrated generally residing on the workpiece supports 126 ofworkpiece tray station 124A. In accordance with the invention, theelevator device 138 is operable to linearly translate theelevator workpiece support 142 along theaxis 147, therein generally lifting and supporting theworkpiece 114A from theworkpiece tray station 124A, as illustrated inFIG. 4B . Once raised from the plurality of workpiece supports 126 oftray station 124A, the workpiece supports may be extended beyond thecircumference 130 of theworkpiece 114A to theextended position 137 via thehorizontal translation device 152, as illustrated inFIG. 4C . Theworkpiece 114A can be then translated (e.g. raised or lowered along the axis 147) to thecharacterization position 150, as illustrated inFIG. 4D , for characterization thereof via one ormore characterization devices 154. - It should be noted that the
characterization position 150 illustrated inFIGS. 4C and 4F in the present example is shown as being generally below thebuffer position 128A. Thus, asingle characterization device 154 can be utilized for serial characterization of bothworkpieces characterization position 150 can reside anywhere below thebuffer position 128B. However, It should be further noted that additional characterization devices (not shown) may be implemented, such that multiple characterization positions are possible both below and abovebuffer positions workpieces - The one or
more characterization devices 154, for example, are operable to detect one or more characteristics associated with the plurality ofworkpieces 114 when each workpiece is at thecharacterization position 150. Thecharacterization devices 154 may comprise one or more of anoptical sensor 156, a camera 157 (illustrated inFIG. 3B ), or various other detection devices, wherein the one or more characterization devices are operable to detect the one or more characteristics associated with the plurality ofworkpieces 114 when each workpiece is at thecharacterization position 150 ofFIGS. 4D and 4F . Theoptical sensor 156, for example, is operable to detect anotch 158 in the workpiece (illustrated inFIG. 6 ), as will be described in greater detail hereafter. The one or more characteristics may further comprise a position of theworkpiece 114 with respect to theelevator workpiece support 142, various indicia (not shown) associated with the workpiece, such as lot number, etc., or various other indicia or characteristics associated with the workpiece. - Referring again to
FIG. 4D , theworkpiece 114A can be removed from thealignment mechanism 122 after characterization thereof (e.g., via thefirst robot 110 orsecond robot 112 ofFIGS. 1A , 1B, or 2), and theelevator device 138 can then generally lift and support theworkpiece 114B from the plurality of workpiece supports 126 ofworkpiece tray station 124B, as illustrated inFIG. 4E . Once raised from the plurality of workpiece supports 126 oftray station 124B, the workpiece supports may be likewise extended beyond thecircumference 130 of theworkpiece 114B to theextended position 137 ofFIG. 4F , and theworkpiece 114B can be then translated (e.g. lowered) to thecharacterization position 150 for characterization thereof. Theworkpiece 114B may then be removed from thealignment mechanism 122 via thefirst robot 110 orsecond robot 112 ofFIGS. 1A-1B orFIG. 2 for subsequent processing. - In accordance with another exemplary aspect of the invention, as illustrated in
FIG. 3B , theelevator device 138 is further rotationally coupled to thebase 132, wherein the alignment mechanism is operable to individually rotate the plurality ofworkpieces 114 about theaxis 147 associated with theelevator shaft 140 ofFIG. 5 . For example, arotation device 160 such as a servo motor may be operably coupled to theelevator shaft 140, wherein the rotation device is operable to rotate the elevator shaft about the axis 147 (e.g., illustrated asarcuate arrow 161 inFIG. 3B ). Therotation device 160 ofFIG. 5 , for example, further determines a rotational position of the elevator shaft 140 (and thus, the workpiece 114), wherein thealignment mechanism 122 is configured to further determine a position of the notch 158 (illustrated inFIG. 3B ), such as for alignment of the workpiece with respect to the alignment mechanism, via the rotation of the workpiece through abeamline 162 of theoptical sensor 156. The determined position of thenotch 158 may be utilized to orient theworkpiece 114 with respect to thealignment mechanism 122 via further rotation of the elevator shaft, for example, for subsequent processing. - The characterization device 154 (e.g., the
optical sensor 156 ofFIG. 5 ) may be further utilized to determine acenter 163 of theworkpiece 114, as illustrated inFIG. 6 , with respect to therotational axis 147 of theelevator workpiece support 142 via an examination of an output from the characterization device during therotation 161. For example,FIG. 7 illustrates aplot 164 of a rotational position 165 (e.g., provided by the servo motor of the rotation device 160) of theelevator shaft 140 andelevator workpiece support 142 ofFIG. 5 versus asensor signal 166 from theoptical sensor 156, wherein thecenter 163 of theworkpiece 114 can be extrapolated from the output signal curve (sensor signal 166) indicating the passage of thenotch 158 through thebeamline 162 and a knowledge of the dimensions of the notch. Accordingly, an offset vector value associated with thecenter 163 of theworkpiece 114 can be provided to thefirst robot 110 and/or thesecond robot 112 ofFIGS. 1A , 1B, and 2, wherein, in the present example, the second robot is configured to pick theworkpiece 114 from thealignment mechanism 122 based on the offset vector value, and wherein the workpiece is generally centered with respect to the seconddual support member 121 when it is picked from alignment mechanism. The rotational position of theworkpiece 114 can be further determined from thesensor signal 166 ofFIG. 7 , wherein the workpiece can be further rotationally aligned with respect to thealignment mechanism 122 prior to being picked by the first orsecond robots FIGS. 1A , 1B, and 2. - Referring again to
FIGS. 1A and 1B , in accordance with another aspect of the invention, theworkpiece handling system 100 further comprises a firstload lock module 168 and a secondload lock module 170 operably coupled to thefront end module 102, wherein the plurality ofworkpieces 114 may be transferred in series or in parallel between the front end module and the first or second load lock modules. For example, a firstload lock chamber 171, a secondload lock chamber 172, a thirdload lock chamber 173, and a fourthload lock chamber 174, are further provided, wherein in the present example, the firstload lock module 168 comprises the first load lock chamber and the third load lock chamber, and wherein the first and third load lock chambers are generally vertically stacked upon one another, as illustrated inFIG. 8 . Further, in a similar manner, the secondload lock module 170 ofFIGS. 1A-1B comprises the secondload lock chamber 172 and the fourthload lock chamber 174, wherein the second and fourth load lock chambers are further generally vertically stacked upon one another. It should be noted that the firstload lock module 168 illustrated inFIG. 8 can be further considered to be representative secondload lock module 170 ofFIGS. 1A-1B , wherein similar features may be present in the first and second load lock modules. - According to the present invention, each of the first, second, third, and fourth
load lock chambers more workpieces 114 therein. Each of the first, second, third, and fourthload lock chambers first isolation valve 175 associated with thefront end module 102, wherein the first isolation valve selectively fluidly couples aninternal volume 176 of the respective load lock chamber to theinternal environment 109 of the front end module. According to one exemplary aspect of the invention, each respectiveinternal volume 176 of the first, second, third, and fourthload lock chambers second volumes load lock module 168FIG. 8 . For example, a mechanical isolation plate (not shown) is generally disposed between the first andsecond volumes workpieces 114A, and wherein the second volume is configured to generally confine another one of the plurality ofworkpieces 114B. The mechanical isolation plate (not shown), for example, generally prevents cross-contamination between thefirst volume 177A and thesecond volume 177B within each respectiveinternal volume 176. - The
workpiece handling system 100 ofFIGS. 1A-1B of the present invention further comprises avacuum module 180 operably coupled to the first and secondload lock modules internal environment 181. For example, one or more high vacuum pumps (not shown) may be operably coupled to thevacuum module 180, therein generally evacuating the vacuum module. Furthermore, each of the first, second, third, and fourthload lock chambers FIG. 8 with respect to the first load lock module 168), wherein the second isolation valve selectively fluidly couples theinternal volume 176 of the respective load lock chamber to the evacuatedinternal environment 181 of the vacuum module. - The
vacuum module 180 ofFIGS. 1A-1B is further operably coupled to aprocessing module 184, such as anion implanter 185 operable to form anion beam 186. Theprocessing module 184, for example, may comprise anelectrostatic chuck 188 disposed therein, wherein the electrostatic chuck is configured to individually selectively support the one ormore workpieces 114. Theprocessing module 184 may further comprise aprocessing robot 190 configured to translate theelectrostatic chuck 188 through aprocess medium 192, such as theion beam 186 from theion implanter 186 for implanting ions into the plurality ofworkpieces 114. Theprocessing module 184 may further comprise a dosimetry system (not shown). - According to another aspect of the invention, the
vacuum module 180, for example, comprises athird robot 194 and afourth robot 196 disposed therein, wherein each of the third and fourth robots, for example, are capable of multiple degrees of freedom including vertical, radial and azimuthal movements. As illustrated inFIG. 2 , thethird robot 194, for example, comprises a first single-workpiece handling arm 198 operably coupled thereto, and thefourth robot 196 comprises a second single-workpiece handling arm 200 operably coupled thereto, wherein the first and second single-workpiece handling arms are each operable to support asingle workpiece 114. - Accordingly, the
workpiece handling system 100, as illustrated inFIGS. 1A-1B , is selectively configured to transfer two or more of the plurality ofworkpieces 114 in parallel (e.g., illustrated as dashed arrows 204) as well as one at a time or serially (e.g., illustrated as solid arrows 206), based on a desired flow of the workpieces through the system. Thefirst robot 110, for example, is configured to selectively transfer two ormore workpieces 114 at a time between theworkpiece transport containers alignment mechanism 122, and the secondload lock module 170 via the first dual-workpiece handling arm 116. Thesecond robot 112 is further configured to selectively transfer the two or more workpieces between theworkpiece transport containers alignment mechanism 122, and the firstload lock module 168 via the second dual-workpiece handling arm 120. The second dual-workpiece handling arm 120, for example, is further configured to serially pickworkpieces position 150 ofFIGS. 5D and 5F ), and then transfer both workpieces in parallel to the secondload lock module 170. For example, the flow ofworkpieces 114 through thesystem 100 can be reversed to serviceworkpiece transport containers second robots fourth robots FIG. 1A , for example, illustrates acounter-clockwise flow 208 for servicingworkpiece transport containers FIG. 1B illustrates aclockwise flow 210 for servicingworkpiece transport containers - In accordance with another aspect, the third and
fourth robots workpiece 114 at a time between theprocess module 184 and the respective firstload lock module 168 and secondload lock module 170. It should be noted that the first andsecond isolation valves load lock chambers workpieces 114 residing within the firstload lock chamber 171, for example, may be pumped down to vacuum or vented while another two workpieces may be independently vented to atmosphere or pumped down to vacuum in the thirdload lock chamber 173 of the firstload lock module 168. Likewise, twoworkpieces 114 residing within the secondload lock chamber 172, for example, may be pumped down to vacuum or vented while another two workpieces may be independently vented to atmosphere or pumped down to vacuum in the fourthload lock chamber 174 of the secondload lock module 170. Thus, in conjunction with thenovel alignment mechanism 122 of the present invention, serial operations such as alignment of the plurality ofworkpieces 114 and processing of the workpieces through theprocess medium 192 may be performed while other parallel (e.g., generally simultaneous) transfers of multiple workpieces are concurrently performed elsewhere in the system. - As illustrated in
FIGS. 1A-1B , acontroller 212 is further provided to control sequencing of workpieces through thesystem 100 and to control activation, deactivation and overall coordination of mechanical and environmental operations during workpiece handling and processing. For example, the controller is configured to control thefront end module 102, the first and secondload lock modules vacuum module 180, theprocessing module 184, and all components and environmental operations associated therewith. Environmental operations, for example, may comprise control of vent and pump down operations for each of theload lock chambers vacuum environment 181 in thevacuum module 180. Mechanical operations, for example, may comprise instructing thealignment mechanism 122, workpiece transport containers 106, the first, second, third, andfourth robots system 100. Thecontroller 212, for example, may comprise multiple individual controllers (not shown) associated with various components of the system, or may be a single controller for thewhole system 100, and all such controllers are contemplated as falling within the scope of the present invention. -
FIG. 9 illustrates anotherexemplary system 213 of the invention, wherein the first dualworkpiece handling arm 116 associated with thefirst robot 110 comprises a first pair of articulatedarms single support member 216 configured to support asingle workpiece 114. The second dualworkpiece handling arm 120 associated with thesecond robot 112, for example, further comprises a second pair of articulatedarms single support member 220 configured to support asingle workpiece 114. The first pair of articulatedarms workpieces 114 between theworkpiece transport containers load lock module 170, and thealignment mechanism 122, in a similar manner as the first dualworkpiece support member 116 ofFIGS. 1A-1B . Likewise, the second pair of articulatedarms FIG. 9 , for example, can be configured to individually or concurrently transfer two or more of theworkpieces 114 between theworkpiece transport containers load lock module 168, and thealignment mechanism 122, in a similar manner as the second dualworkpiece support member 120 ofFIGS. 1A-1B .FIGS. 10A and 10B illustrate several views of anexemplary robot 222. Thefirst robot 110 and/orsecond robot 112 ofFIGS. 1A-1B , 2, and/or 9, for example, may comprise therobot 222 shown inFIGS. 10A and 10B . As illustrated inFIGS. 10A and 10B , therobot 222 comprises articulatedarms single support member robot 222 is operable to translate thesingle support members - In accordance with another aspect of the present invention,
FIG. 11 illustrates an exemplary timing diagram 300 for transferring a plurality of workpieces (e.g., eight workpieces) in a workpiece handling system associated with an ion implantation system. Thesystem 100 illustrated inFIGS. 1A , 1B, and 2, and thesystem 213 illustrated inFIG. 9 , for example, can be operated in accordance with the timing diagram 300 ofFIG. 11 . InFIG. 11 , anexemplary flow 301 of first and second workpieces (workpiece “A” and workpiece “B”, respectively) through the system is highlighted, wherein first hatching 302 depicts acts associated both the first workpiece and second workpiece being performed concurrently, second hatching 303 depicts acts associated with only the first workpiece (e.g., serially), and third hatching 304 depicts acts associated with only the second workpiece (e.g., serially). It is noted that acts performed on other workpieces are illustrated as having no hatching, and that such acts can be performed concurrently (in parallel) or in series with the acts associated with first and/or second workpieces Furthermore, amethod 305 for transferring workpieces in a semiconductor processing system is illustrated inFIG. 12 , wherein the timing diagram 300 ofFIG. 11 may be further referenced. It should be noted that while exemplary methods are illustrated and described herein as a series of acts or events, it will be appreciated that the present invention is not limited by the illustrated ordering of such acts or events, as some steps may occur in different orders and/or concurrently with other steps apart from that shown and described herein, in accordance with the invention. In addition, not all illustrated steps may be required to implement a methodology in accordance with the present invention. Moreover, it will be appreciated that the methods may be implemented in association with the systems illustrated and described herein as well as in association with other systems not illustrated. - As illustrated in
FIG. 12 , themethod 305 begins atact 310, wherein a first workpiece and a second workpiece are generally concurrently removed (e.g., removed in parallel) from a first workpiece transport container by a first robot. The first and second workpieces are then generally concurrently placed on an alignment mechanism via the first robot inact 312. The first workpiece is then aligned and/or characterized inact 314. For example, the first workpiece is raised from a first workpiece support of the alignment mechanism via an elevator device. The first workpiece is further vertically translated to a characterization position, wherein the first workpiece is generally characterized, such as determining a position of a notch in the workpiece, identifying the workpiece, and/or determining a spatial orientation of the workpiece with respect to the alignment mechanism. The first workpiece is then removed from the alignment mechanism via a second robot inact 316. - The second workpiece is then aligned and/or characterized in
act 318. For example, the second workpiece is raised from a second workpiece support of the alignment mechanism via the elevator device and then translated to the characterization position, wherein the second workpiece is characterized. The second workpiece is then removed from the alignment mechanism via the second robot inact 320, wherein the second robot is now generally supporting the first and second workpieces. The first and second workpieces are placed into a first load lock chamber in parallel inact 322 via the second robot, and the first load lock chamber is generally evacuated inact 324. - In
act 326, the first workpiece is removed from first load lock chamber via a third robot and placed in a process chamber (e.g., placed on an electrostatic chuck in the process chamber). The first workpiece is subjected to a process medium, such as an ion beam associated with an ion implanter, inact 328, wherein ions are implanted into the first workpiece. Once ion implantation is complete, the first workpiece is removed from the process chamber via a fourth robot and placed in a second load lock chamber inact 330. At least partially concurrent to act 330, the second workpiece is removed from the first load lock chamber and placed in the process chamber via the third robot inact 332, wherein the second workpiece is implanted with ions inact 334. Once ion implantation into the second workpiece is complete, the second workpiece is removed from the process chamber via the fourth robot and placed in the second load lock chamber inact 336. Thus, the first and second workpieces are serially transported from the first load lock chamber to the process chamber for processing by the third robot, and serially transferred from the process chamber to the second load lock chamber by the fourth robot. - In
act 338, the second load lock chamber is vented to generally atmospheric pressure, and the first and second workpieces are removed from the second load lock chamber in parallel via the first robot inact 340. Inact 342, the first and second workpieces are placed in a second workpiece transport container. As an alternative, it should be noted that the first workpiece transport container and the second workpiece transport container can be the same workpiece transport container. -
Acts 310 through 342 can be further repeated for third and fourth workpieces, fifth and sixth workpieces, etc., as illustrated in the timing diagram 300 ofFIG. 11 . For example,FIG. 13 illustrates a continuation of themethod 305 ofFIG. 12 , wherein the third and fourth workpieces are generally concurrently removed from the first workpiece transport container by the first robot inact 344, at least partially concurrently withact 322 ofFIG. 12 . The third and fourth workpieces are then placed in parallel on the alignment mechanism via the first robot inact 346 ofFIG. 13 . The third workpiece is then aligned inact 348 and removed from the alignment mechanism via the second robot inact 350. The fourth workpiece is then aligned inact 352, and the fourth workpiece is then removed from the alignment mechanism via the second robot inact 354, wherein the second robot is now generally supporting the third and fourth workpieces. The third and fourth workpieces are placed into a third load lock chamber in parallel inact 356 via the second robot, and the third load lock chamber is generally evacuated inact 358. Inact 360, the third workpiece is removed from third load lock chamber via the third robot and placed in the process chamber via the third robot. Ions are then implanted into the third workpiece inact 362, and the third workpiece is removed from the process chamber via the fourth robot and placed in a fourth load lock chamber inact 364. At least partially concurrent to act 364, the fourth workpiece is removed from the third load lock chamber and placed in the process chamber via the third robot inact 366, wherein the fourth workpiece is implanted with ions inact 368. Once ion implantation into the fourth workpiece is complete, the fourth workpiece is removed from the process chamber via the fourth robot and placed in the fourth load lock chamber inact 370. Thus, the third and fourth workpieces are serially transported from the third load lock chamber to the process chamber for processing by the third robot, and serially transferred from the process chamber to the fourth load lock chamber by the fourth robot. - In
act 372, the fourth load lock chamber is vented to generally atmospheric pressure, and the third and fourth workpieces are removed from the fourth load lock chamber in parallel via the first robot inact 374. Inact 376, the third and fourth workpieces are placed back in the first workpiece transport container or the second workpiece transport container. - As illustrated in the timing diagram 300 of
FIG. 11 , various acts are performed at least partially concurrently with other acts. For example, acts 348, 350, 352, 354, and 376 ofFIG. 13 are performed at least partially concurrently withact 324 ofFIG. 12 . Further, acts 326, 328, 330, and 332 are performed at least partially concurrently withacts FIG. 13 .Acts FIG. 12 , for example, can be performed at least partially concurrently withacts FIG. 13 , and further, acts 362, 364, 366, and 368 can be performed at least partially concurrently withact 338. Further, as more workpieces are processed, more acts may be concurrently performed, as illustrated in the timing diagram 300 ofFIG. 11 , and all such concurrencies are contemplated as falling within the scope of the present invention. - Parallel processing of workpieces advantageously improves productivity of the system. For example, load lock chambers may operate in a sequential manner such that at a given point in time one load lock is open to the vacuum module, one load lock chamber is open to the front end module, one load lock chamber is venting to atmosphere, and one load lock chamber is pumping down to vacuum. Accordingly, each of the first, second, third, and fourth load lock chambers go through a sequence generally repetitively, recommencing the full cycle at generally equally phased intervals.
- Accordingly, the present invention provides for a reduced cost of ownership of the processing system (e.g., an ion implantation system) by efficiently transferring workpieces between atmospheric and vacuum environments. Although the invention has been shown and described with respect to a certain preferred embodiment or embodiments, it is obvious that equivalent alterations and modifications will occur to others skilled in the art upon the reading and understanding of this specification and the annexed drawings. In particular regard to the various functions performed by the above described components (assemblies, devices, circuits, etc.), the terms (including a reference to a “means”) used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (i.e., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary embodiments of the invention. In addition, while a particular feature of the invention may have been disclosed with respect to only one of several embodiments, such feature may be combined with one or more other features of the other embodiments as may be desired and advantageous for any given or particular application.
Claims (52)
1. A workpiece handling system, comprising:
a workpiece transport container configured to support a plurality of workpieces;
a front end module in selective engagement with the workpiece transport container, wherein the front end module comprises:
a first robot having a first dual-workpiece handling arm operably coupled thereto;
a second robot having a second dual-workpiece handling arm operably coupled thereto; and
an alignment mechanism disposed generally between the first and second robots, wherein the alignment mechanism comprises a characterization device and two or more vertically-aligned workpiece supports configured to respectively support two or more of the plurality of workpieces;
a vacuum chamber, comprising:
a third robot having a first single-workpiece handling arm operably coupled thereto; and
a fourth robot having a second single-workpiece handling arm operably coupled thereto;
a processing module operably coupled to the vacuum chamber;
a first load lock chamber, a second load lock chamber, a third load lock chamber, and a fourth load lock chamber, wherein each of the first, second, third, and fourth load lock chambers is operably coupled to both the front end module and the vacuum chamber and configured to support two or more of the plurality of workpieces therein, wherein:
the first robot is configured to selectively transfer the plurality of workpieces between the workpiece transport container, the alignment mechanism, and the second and fourth load lock chambers via the first dual-workpiece handling arm,
the second robot is configured to selectively transfer the plurality of workpieces between the workpiece transport container, the alignment mechanism, and the first and third load lock chambers via the second dual-workpiece handling arm,
the third robot is configured to selectively transfer the plurality of workpieces between the first and third load lock chambers and the process module via the first single-workpiece handling arm, and
the fourth robot is configured to selectively transfer the plurality of workpieces between the second and fourth load lock chambers and the process module via the second single-workpiece handling arm; and
a controller configured to selectively transfer the plurality of workpieces between the workpiece transport container, alignment mechanism, first, second, third, and fourth load lock chambers, and process module via a control of the first, second, third, and fourth robots.
2. The workpiece handling system of claim 1 , wherein the first and third load lock chambers are generally aligned vertically, therein defining a first load lock module, and wherein the second and fourth load lock chambers are further generally aligned vertically, therein defining a second load lock module.
3. The workpiece handling system of claim 1 , wherein the first, second, third, and fourth load lock chambers each respectively comprise a first isolation valve associated with the front end module and a second isolation valve associated with the vacuum chamber, wherein each first isolation valve is configured to selectively permit a fluid communication between the front end module and a respective internal volume of the first, second, third, and fourth load lock chambers, and wherein each second isolation valve is configured to selectively permit a fluid communication between the vacuum chamber and the respective internal volume of the first, second, third, and fourth load lock chambers.
4. The workpiece handling system of claim 3 , wherein the respective internal volume of the first, second, third, and fourth load lock chambers each comprises first and second volumes generally separated by a mechanical isolation plate disposed therebetween, wherein the first volume is configured to generally confine one of the plurality of workpieces, wherein the second volume is configured to generally confine another one of the plurality of workpieces, and wherein the mechanical isolation plate generally prevents cross-contamination between the first volume and the second volume of each respective internal volume.
5. The workpiece handling system of claim 1 , wherein each of the first and second dual-workpiece handling arms is configured to alternatively support one or two of the plurality of workpieces.
6. The workpiece handling system of claim 5 , wherein the first robot is configured to selectively concurrently transfer two of the plurality of workpieces between the workpiece transport container, the alignment mechanism, and the second and fourth load lock chambers via the first dual-workpiece handling arm.
7. The workpiece handling system of claim 6 , wherein the second robot is configured to selectively serially remove one of the plurality of workpieces at a time from the alignment mechanism and to transfer the two of the plurality of workpieces at a time to and from the first and second load lock chambers.
8. The workpiece handling system of claim 1 , wherein each of the first and second dual-workpiece handling arms is configured to concurrently support two workpieces.
9. The workpiece handling system of claim 1 , wherein each of the first and second single-workpiece handling arms is configured to support a single workpiece.
10. The workpiece handling system of claim 1 , wherein the process module comprises an electrostatic chuck configured to selectively support each of the plurality of workpieces.
11. The workpiece handling system of claim 10 , wherein the process module comprises a processing robot configured to translate the electrostatic chuck through a process medium.
12. The workpiece handling system of claim 1 , wherein the process module comprises an ion implantation system configured to implant ions into the plurality of workpieces.
13. The workpiece handling system of claim 12 , wherein the process module further comprises a dosimetry system.
14. The workpiece handling system of claim 1 , wherein the front end module comprises an internal environment at substantially atmospheric pressure, and wherein the vacuum chamber and process module comprise a generally evacuated internal environment.
15. The workpiece handling system of claim 14 , further comprising a high vacuum pump in fluid communication with one or more of the vacuum chamber and the process module.
16. The workpiece handling system of claim 1 , wherein the alignment mechanism further comprises a base and an elevator device operably coupled thereto, wherein the elevator device is configured to individually vertically translate the two or more workpieces, therein respectively translating the two or more workpieces to a characterization position.
17. The workpiece handling system of claim 16 , wherein the two or more vertically-aligned workpiece supports comprise two or more workpiece tray stations aligned generally vertically with respect to one another, wherein each workpiece tray station is operable to selectively support a respective one of the plurality of workpieces in a buffer position.
18. The workpiece handling system of claim 17 , wherein the elevator device comprises an elevator shaft operably coupled to an elevator workpiece support, wherein the elevator shaft is in linear sliding engagement with the base, wherein the elevator workpiece support is operable to selectively support each of the plurality of workpieces from the plurality of workpiece tray stations, and wherein the elevator shaft is operable to vertically translate the plurality of workpieces from the respective buffer position to a characterization position.
19. The workpiece handling system of claim 18 , wherein the characterization device is operable to detect one or more characteristics of the plurality of workpieces when each workpiece is at the characterization position.
20. The workpiece handling system of claim 19 , wherein the characterization device comprises an optical sensor, wherein the optical sensor is operable to detect the one or more characteristics of the plurality of workpieces when each workpiece is at the characterization position.
21. The workpiece handling system of claim 20 , wherein the one or more characteristics comprise one or more of a notch in the workpiece, a position of the workpiece with respect to the elevator workpiece support, and an indicia associated with the workpiece.
22. The workpiece handling system of claim 21 , wherein the position of the workpiece comprises one or more of a rotational position of the workpiece and a center of the workpiece.
23. The workpiece handling system of claim 18 , further comprising a controller operable to control the workpiece tray stations, elevator device, and characterization device.
24. The workpiece handling system of claim 18 , wherein each workpiece tray station comprises:
a plurality of workpiece supports associated with a circumference of the workpiece, wherein, in a retracted position, the plurality of workpiece supports are operable to support the workpiece; and
a horizontal translation device operably coupled to the plurality of workpiece supports, wherein the horizontal translation device is operable to selectively radially extend the plurality of workpiece supports from the retracted position to an extended position beyond the circumference of the workpiece, and wherein the elevator device is operable to support the workpiece when the plurality of workpiece supports are in the extended position.
25. The workpiece handling system of claim 24 , wherein the elevator device is operable to generally lift the workpiece from the plurality of workpiece supports when the plurality of workpiece supports are in the retracted position, and to translate the workpiece below the plurality of workpiece supports when the plurality of workpiece supports are in the extended position.
26. The workpiece handling system of claim 24 , wherein the plurality of workpiece supports comprise two or more arcuate support members.
27. The workpiece handling system of claim 18 , wherein the elevator shaft is further rotationally coupled to the base.
28. The workpiece handling system of claim 27 , further comprising a motor operably coupled to the elevator shaft, wherein the motor is operable to rotate the elevator shaft about an axis thereof.
29. The workpiece handling system of claim 28 , wherein the motor comprises a servo motor.
30. The workpiece handling system of claim 27 , wherein the elevator workpiece support comprises a vacuum chuck operable to selectively grip each of the plurality of workpieces.
31. The workpiece handling system of claim 1 , wherein the workpiece transport container comprises a FOUP.
32. A method for handling a plurality of workpieces in an ion implantation system, the method comprising:
concurrently removing a first workpiece and a second workpiece from a workpiece transport container via a first robot in a generally atmospheric environment;
concurrently placing the first and second workpieces on respective first and second workpiece supports of an alignment mechanism;
raising the first workpiece from the first workpiece support via an elevator device and translating the first workpiece to a characterization position;
characterizing the first workpiece;
removing the first workpiece from the first workpiece support via a second robot;
raising the second workpiece from the second workpiece support via the elevator device and translating the second workpiece to the characterization position;
characterizing the second workpiece;
removing the second workpiece from the second workpiece support via the second robot;
generally simultaneously inserting the first and second workpieces into a first load lock chamber; and
generally evacuating the first load lock chamber.
33. The method of claim 32 ; further comprising:
transferring the first workpiece from the first load lock chamber to a vacuum chamber via a third robot;
processing the first workpiece through a process medium associated with the vacuum chamber;
transferring the first workpiece from the vacuum chamber to a second load lock chamber via a fourth robot;
transferring the second workpiece from the first load lock chamber to the vacuum chamber via the third robot;
processing the second workpiece through the process medium;
transferring the second workpiece from the vacuum chamber to the second load lock chamber via the fourth robot; and
generally venting the second load lock chamber to atmosphere.
34. The method of claim 33 , further comprising:
generally simultaneously transferring the first and second workpieces from the second load lock chamber to the workpiece transport container via the first robot.
35. The method of claim 33 , further comprising:
generally simultaneously removing a third workpiece and a fourth workpiece from the workpiece transport container via the first robot;
generally simultaneously placing the third and fourth workpieces on the respective first and second workpiece supports of the alignment mechanism;
raising the third workpiece from the first workpiece support via the elevator device and translating the third workpiece to the characterization position;
characterizing the third workpiece;
removing the third workpiece from the first workpiece support via the second robot;
raising the fourth workpiece from the second workpiece support via the elevator device and translating the second workpiece to the characterization position;
characterizing the second workpiece;
removing the second workpiece from the second workpiece support via the second robot;
generally simultaneously inserting the third and fourth workpieces into a third load lock chamber; and
generally evacuating the third load lock chamber.
36. The method of claim 35 , further comprising:
transferring the third workpiece from the third load lock chamber to the vacuum chamber via the third robot;
processing the third workpiece through the process medium;
transferring the third workpiece from the vacuum chamber to a fourth load lock chamber via the fourth robot;
transferring the fourth workpiece from the third load lock chamber to the vacuum chamber via the third robot;
processing the fourth workpiece through the process medium;
transferring the fourth workpiece from the vacuum chamber to the fourth load lock chamber via the fourth robot; and
generally venting the fourth load lock chamber to atmosphere.
37. The method of claim 36 , further comprising:
generally simultaneously transferring the third and fourth workpieces from the fourth load lock chamber to the workpiece transport container via the first robot.
38. The method of claim 35 , wherein the first and second workpieces are transferred from the second load lock chamber to the workpiece transport container generally concurrent with the third and fourth workpieces being characterized and transferred into the third load lock chamber.
39. The method of claim 35 , wherein the third robot transfers the third workpiece into the vacuum chamber after or while the second workpiece is processed through the process medium.
40. A method for handling a plurality of workpieces in an ion implantation system, the method comprising:
(a) removing a first workpiece and a second workpiece in parallel from a first workpiece transport container via a first robot;
(b) placing the first workpiece and second workpiece in parallel on an alignment mechanism via the first robot;
(c) aligning the first workpiece via the alignment mechanism;
(d) removing the first workpiece from the alignment mechanism via a second robot;
(e) aligning the second workpiece via the alignment mechanism;
(f) removing the second workpiece from the alignment mechanism via the second robot;
(g) placing the first workpiece and second workpiece in parallel in a first load lock chamber via the second robot;
(h) generally evacuating the first load lock chamber;
(i) removing the first workpiece from the first load lock chamber and placing the first workpiece in a process chamber via a third robot;
(j) implanting ions into the first workpiece;
(k) removing the first workpiece from the process chamber and placing the first workpiece in a second load lock chamber via a fourth robot while removing the second workpiece from the first load lock chamber and placing the second workpiece in the process chamber via the third robot;
(l) implanting ions into the second workpiece;
(m) removing the second workpiece from the process chamber and placing the second workpiece in the second load lock chamber via the fourth robot;
(n) venting the second load lock chamber to generally atmospheric pressure;
(o) removing the first workpiece and second workpiece in parallel from the second load lock chamber via the first robot; and
(p) placing the first workpiece and second workpiece in parallel in a second workpiece transport container.
41. The method of claim 40 , further comprising:
(q) removing a third workpiece and a fourth workpiece in parallel from the first workpiece transport container via the first robot
(r) placing the third workpiece and fourth workpiece in parallel on the alignment mechanism via the first robot;
(s) aligning the third workpiece via the alignment mechanism;
(t) removing the third workpiece from the alignment mechanism via the second robot;
(u) aligning the fourth workpiece via the alignment mechanism;
(v) removing the fourth workpiece from the alignment mechanism via the second robot;
(w) placing the third workpiece and fourth workpiece in parallel in a third load lock chamber via the second robot;
(x) generally evacuating the third load lock chamber;
(y) removing the third workpiece from the third load lock chamber and placing the third workpiece in the process chamber via the third robot;
(z) implanting ions into the third workpiece;
(aa) removing the third workpiece from the process chamber and placing the third workpiece in a fourth load lock chamber via the fourth robot while removing the fourth workpiece from the third load lock chamber and placing the fourth workpiece in the process chamber via the third robot;
(bb) implanting ions into the fourth workpiece;
(cc) removing the fourth workpiece from the process chamber and placing the fourth workpiece in the fourth load lock chamber via the fourth robot;
(dd) venting the fourth load lock chamber to generally atmospheric pressure;
(ee) removing the third workpiece and fourth workpiece in parallel from the fourth load lock chamber via the first robot; and
(ff) placing the third workpiece and fourth workpiece in parallel in the second workpiece transport container.
42. The method of claim 41 , wherein:
acts (s), (t), (u), (v), and (ff) are performed at least partially concurrently with act (h), and
acts (i), (j), (k), and (l) are performed at least partially concurrently with act (x).
43. The method of claim 41 , wherein:
acts (e), (f), (q), and (r) are performed at least partially concurrently with act (dd), and
acts (z), (aa), and (bb) are performed at least partially concurrently with act (n).
44. The method of claim 40 , wherein the first workpiece transport container and the second workpiece transport container are the same workpiece transport container.
45. The method of claim 40 , wherein act (b) comprises concurrently placing the first workpiece on a first workpiece support of the alignment mechanism and placing the second workpiece on a second workpiece support of the alignment mechanism.
46. The method of claim 45 , wherein act (c) comprises:
raising the first workpiece from the first workpiece support to a characterization position via an elevator device of the alignment mechanism;
rotating the first workpiece via the elevator device; and
determining one or more characteristics of the first workpiece, wherein the first workpiece is generally aligned with respect to the alignment mechanism via the rotation thereof based on the one or more characteristics of the first workpiece.
47. The method of claim 46 , wherein act (d) comprises removing the first workpiece from the first workpiece support via the second robot.
48. The method of claim 45 , wherein act (e) comprises:
raising the second workpiece from the second Workpiece support to the characterization position via the elevator device of the alignment mechanism;
rotating the second workpiece via the elevator device; and
determining one or more characteristics of the second workpiece, wherein the second workpiece is generally aligned with respect to the alignment mechanism via the rotation thereof based on the one or more characteristics of the second workpiece.
49. The method of claim 48 , wherein act (f) comprises removing the second workpiece from the second workpiece support via the second robot.
50. A workpiece handling system, comprising:
a workpiece transport container configured to support a plurality of workpieces;
a front end module comprising a pair of atmospheric robots and a multi-workpiece alignment mechanism generally disposed between the pair of atmospheric robots, wherein the front end module is selectively operably coupled to the workpiece transport container, and wherein each of the pair of atmospheric robots comprises a dual workpiece handling arm;
a vacuum chamber comprising a pair of vacuum robots, wherein each of the vacuum robots comprises a single workpiece handling arm;
a processing module operably coupled to the vacuum module;
four dual-workpiece load lock chambers operably coupled to the front end module and the vacuum chamber; and
a controller configured to selectively transfer two or more workpieces at a time between two or more of the workpiece transport container, alignment mechanism and four dual-workpiece load lock chambers via a control of the pair of atmospheric robots, and wherein the controller is further configured to selectively individually transfer each workpiece between the four dual-workpiece load lock chambers and the processing module via a control of the pair of vacuum robots.
51. The workpiece handling system of claim 50 , wherein the workpiece transport container comprises a FOUP.
52. The workpiece handling system of claim 50 , comprising a plurality of workpiece transport containers operably coupled to the front end module, and wherein the pair of atmospheric robots are operable to transfer the plurality of workpieces between the plurality of workpiece transport containers, alignment mechanism and four dual-workpiece load lock chambers via the control of the pair of atmospheric robots.
Priority Applications (8)
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US11/634,644 US20080138178A1 (en) | 2006-12-06 | 2006-12-06 | High throughput serial wafer handling end station |
JP2009540239A JP5323718B2 (en) | 2006-12-06 | 2007-11-30 | High-productivity continuous wafer processing equipment |
KR1020097014107A KR101530513B1 (en) | 2006-12-06 | 2007-11-30 | High throughput serial wafer handling end station |
PCT/US2007/024698 WO2008070003A2 (en) | 2006-12-06 | 2007-11-30 | High throughput serial wafer handling end station |
CN2007800450552A CN101548361B (en) | 2006-12-06 | 2007-11-30 | High throughput serial wafer handling end station |
EP07862406A EP2095401A2 (en) | 2006-12-06 | 2007-11-30 | High throughput serial wafer handling end station |
TW096146040A TWI442447B (en) | 2006-12-06 | 2007-12-04 | High throughput serial wafer handling end station and a method for handling a plurality of workpieces in an ion implantation system |
US15/391,086 US10832926B2 (en) | 2006-12-06 | 2016-12-27 | High throughput serial wafer handling end station |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/634,644 US20080138178A1 (en) | 2006-12-06 | 2006-12-06 | High throughput serial wafer handling end station |
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US15/391,086 Continuation US10832926B2 (en) | 2006-12-06 | 2016-12-27 | High throughput serial wafer handling end station |
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US20080138178A1 true US20080138178A1 (en) | 2008-06-12 |
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US15/391,086 Active 2029-06-07 US10832926B2 (en) | 2006-12-06 | 2016-12-27 | High throughput serial wafer handling end station |
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US15/391,086 Active 2029-06-07 US10832926B2 (en) | 2006-12-06 | 2016-12-27 | High throughput serial wafer handling end station |
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US (2) | US20080138178A1 (en) |
EP (1) | EP2095401A2 (en) |
JP (1) | JP5323718B2 (en) |
KR (1) | KR101530513B1 (en) |
CN (1) | CN101548361B (en) |
TW (1) | TWI442447B (en) |
WO (1) | WO2008070003A2 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US10832926B2 (en) | 2020-11-10 |
EP2095401A2 (en) | 2009-09-02 |
WO2008070003A2 (en) | 2008-06-12 |
TW200835638A (en) | 2008-09-01 |
US20170178933A1 (en) | 2017-06-22 |
KR101530513B1 (en) | 2015-06-24 |
TWI442447B (en) | 2014-06-21 |
KR20090097182A (en) | 2009-09-15 |
CN101548361A (en) | 2009-09-30 |
JP2010512025A (en) | 2010-04-15 |
CN101548361B (en) | 2011-05-18 |
WO2008070003A3 (en) | 2008-08-07 |
JP5323718B2 (en) | 2013-10-23 |
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AS | Assignment |
Owner name: AXCELIS TECHNOLOGIES, INC., MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FERRARA, JOSEPH;MITCHELL, ROBERT J.;REEL/FRAME:019506/0842 Effective date: 20061206 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |