WO2004006120A1 - System and method for dispensing liquids - Google Patents
System and method for dispensing liquids Download PDFInfo
- Publication number
- WO2004006120A1 WO2004006120A1 PCT/US2003/019258 US0319258W WO2004006120A1 WO 2004006120 A1 WO2004006120 A1 WO 2004006120A1 US 0319258 W US0319258 W US 0319258W WO 2004006120 A1 WO2004006120 A1 WO 2004006120A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dispensing
- liquid
- data
- authorization code
- verifiable
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
Definitions
- the field of invention relates generally to micro-fabrication of structures. More particularly, the present invention is directed to a system and method for dispensing liquids to facilitate patterning substrates using imprint lithography.
- Micro-fabrication involves the fabrication of very small structures, e.g., having features on the order of micro-meters or smaller.
- One area in which micro- fabrication has had a sizeable impact is in the processing of integrated circuits.
- micro-fabrication becomes increasingly important.
- Micro-fabrication provides greater process control while allowing increased reduction of the minimum feature dimension of the structures formed.
- Other areas of development in which micro-fabrication has been employed include biotechnology, optical technology, mechanical systems and the like.
- FIG. 6 An exemplary micro-fabrication technique is shown in United States patent number 6,334,960 to Willson et al .
- Willson et al disclose a method of forming a relief image in a structure.
- the method includes providing a substrate having a transfer layer.
- the transfer layer is covered with a polymerizable liquid composition.
- a mold makes mechanical contact with the polymerizable liquid.
- the mold includes a relief structure, and the polymerizable liquid composition fills the relief structure.
- the polymerizable liquid composition is then subjected to conditions to solidify and polymerize the same, forming a solidified polymeric material on the transfer layer that contains a relief structure complimentary to that of the mold.
- the mold is then separated from the solid polymeric material such that a replica of the relief structure in the mold is formed in the solidified polymeric material.
- the transfer layer and the solidified polymeric material are subjected to an environment to selectively etch the transfer layer relative to the solidified polymeric material such that a relief image is formed in the transfer layer.
- the time required and the minimum feature dimension provided by this technique is dependent upon, inter alia, the composition of the polymerizable material .
- the present invention includes a method and system to dispense a liquid, contained in a cartridge, onto a substrate employing a dispensing system under control of a processor in data communication with a memory.
- the method includes associating an identification code with the cartridge, defining a verifiable identification code.
- the verifiable identification code includes data concerning characteristics of the liquid, defining verifiable characteristic data.
- a request is received from a user to activate the dispensing system and permit dispensing of the liquid. To that end, the request includes the verifiable identification code and data concerning the user, defining user data.
- the verifiable identification code and the user data is compared to a database containing historical information concerning the user.
- the historical information includes identification codes of cartridges previously associated with the user, defining historical identification codes.
- the historical identification codes include historical data describing characteristics of liquids contained in the cartridges previously associated with the user.
- a requested authorization code is generated in response to ascertaining that the historical data matches the verifiable characteristic data.
- the requested authorization code is transmitted to the user to facilitate activation of the dispensing system in furtherance of dispensing the liquid.
- FIG. 1 is a simplified elevation view of a liquid dispensing system in accordance with one embodiment of the present invention
- FIG. 2 is a detailed view of the nozzle system and cleaning station shown in Fig. 1, in accordance with one embodiment of the present invention
- Fig. 3 is a flow diagram of a method for dispensing liquid in accordance with one embodiment of the present invention
- FIG. 4 is a flow diagram of a method for dispensing liquid in accordance with a second embodiment of the present invention.
- Fig. 5 is a simplified elevation view of a liquid dispensing system in accordance with a second embodiment of the present invention.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0011] Referring to Fig. 1, a dispensing system 10 in accordance with one embodiment of the present invention includes two sub-systems 10a and 10b.
- Sub-system 10b includes a plurality of receptacles 12 and 14, each of which is adapted to receive a cartridge 16 and 18, respectively.
- Each of cartridges 16 and 18 contains a liquid 20 and 22, respectively.
- a source of gas pressure (not shown) may be applied to cartridges 16 and 18.
- a valve 28 is in fluid communication with cartridges 16 and 18 through conduits 30 and 32, respectively.
- a nozzle system 34 is in fluid communication with valve 28 via a pump 36 and a conduit 38. Valve 28 operates to selectively place cartridges 16 and 18 in fluid communication with pump 36. In this manner, pump 36 selectively creates a flow of liquid 20 or 22 to propagate through conduit 38 and into nozzle system 34. " Liquid 20 or 22 propagating through nozzle system 34 egresses therefrom at tip 40. To that end, tip 40 of nozzle system 34 defines a dispensing axis 40a along which liquid 20 or 22 travels.
- a substrate 42 Disposed opposite to tip 40 in said dispensing axis 40a is a substrate 42. Liquid 20 or 22 exiting tip 40 is deposited on substrate 42. The distance between tip 40 and substrate 42 is selected to avoid splashing of liquids, as well as to prevent gas from being present in liquid disposed thereon.
- An exemplary nozzle system 34 and pump 36 combination consist of a piezo-electric ink- jet system or a micro-solenoid system. These systems are suitable for use with system 10 because they can provide accurate and high-resolution volume control. It is desirable that system 10 dispense, onto substrate 42, liquid drops having a volume of 5 nano-liters or less.
- the surface energy at tip 40 may be designed for specific liquids to allow formation of drops of desired shapes for dispensing.
- a mount 44 is connected to a set of motors 46 to move in two directions perpendicular to dispensing axis 40a and, optionally, along a third direction parallel to dispensing axis 40a.
- a filter 48 may be positioned in conduit 38 between valve 28 and pump 36 to remove unwanted gases and particles in a flow traveling therebetween. Filter 48 may be configured to be replaced automatically to facilitate continuous operation of system 10.
- sub-system 10b includes a processing system 50 and sub-system 10a includes a " processing system 52.
- Processing systems 50 and 52 communicate over a communication link 54.
- Communication link 54 may be any known communication link such as a local area network communication with use of Ethernet protocols, or a public wide area network, such as a public switched telephone network over ASDL telephone lines or large bandwidth trunks, such as Tl or OC3 service.
- subsystem 10a may be remotely disposed with respect to subsystem 10b, i.e., processing system 10a may be disposed in an area that is different from the area in which subsystem 10b is disposed, e.g., a different room, a different building, a different country and the like.
- Processing system 50 controls the operations of system 10 and processing system 52 provides authorization to processing system 50 to commence dispensing of liquid 20 or 22.
- processing system 50 is in data communication with detectors 24 and 26, valve 28, pump 36 and the set of motors 46 and includes a processor 50a, a memory 50b and a communications sub-system 50c both of which are in data communication with processor 50a.
- a user interface 51 which may consist of a keyboard, monitor, floppy disk drive system and other devices to interface a user with processor 50a.
- Processing system 50 operates to produce a plurality of discrete drops of liquid on surface 42a of substrate 42 by appropriately timing the movement of substrate 42 and egression of liquid 20 or 22 from tip 40.
- system 10 includes a cleaning station 60 having a chamber 62 and a supply of cleaning liquid 64.
- Supply 64 is in fluid communication with chamber 62 via conduit 66.
- Chamber 62 may include a waste drain 68 that may be connected to a vacuum source
- Nozzle system 34 is designed to facilitate selectively placing tip 40 in chamber 62 for cleaning.
- nozzle system 34 includes a tip portion 34a and a base portion 34b.
- Base portion 34b is connected to pump 36.
- Tip portion 34a is pivotally coupled to base portion 34b through a pivot 34c to reciprocate between a dispensing position and a cleaning position.
- dispensing axis 40a In the cleaning position (shown by dashed lines) dispensing axis 40a is orientated to extend parallel to a plane 42b in which substrate 42 lies. In the dispensing position, dispensing axis 40a extends transversely to plane 42b. In this manner tip 40 may be quickly cleaned during dispensing of liquid 20 or 22.
- cleaning station 60 may be designed to move with respect to nozzle system 34, thereby abrogating the need for pivot 34c.
- chamber 62 moves with respect to nozzle system 34 to ensure that tip 40 is disposed therein during cleaning.
- system 10 may be configured so that mount 44 is moved so that the same is no longer proximate to tip 40 during cleaning.
- mount 44 and chamber 62 may be mounted to a moveable table (not shown) to reciprocate in and out of a proximity with tip 40 so that the tip 40 may be selectively placed in cleaning chamber 62.
- cleaning of tip 40 may be performed during substrate 42 loading to further reduce particulate contamination.
- system 10 includes two cartridges 16 and 18. Each of cartridges 16 and 18 which has a detector 24 and 26 in optical communication with liquid 20 and 22, contained therein. In this manner, once detector 24 senses that liquid 20 has reached a minimum level in cartridge 16, a signal is transmitted to processor 50a. In response, processor 50a activates valve 28 to disrupt fluid communication between conduits 30 and 32 and effectuate fluid communication between conduits 32 and 38. Thereafter, a user (not shown) , such as the owner/lessee of sub-system 10b, would remove cartridge 16 from receptacle 12 and replace the same with a new cartridge. In this manner, pump 36 may maintain a continuous flow of liquid to nozzle system 34, while cartridge 16 is being replaced. A similar situation is present when cartridge 18 is replaced.
- valve 28 cannot be activated to place conduits 30 and 32 in fluid communication until an authorization code has been received.
- processor 50a would deactivate pump 36, until authorization was received for at least one of the replaced cartridges 16 or 18.
- pump 36 would be activated by processor 50a only after an authorization code had been received for all of cartridges 16 and 18. This is to prevent, inter alia, cross-contamination of liquids in system 10, because such cross-contamination may produce catastrophic failures in the subsequent patterning of substrate 42.
- each cartridge 16 and 18 includes indicia 56 and 58, respectively, that recites an identification code.
- the identification code associated with each cartridge 16 and 18 is unique and differs from the identification code associated with the remaining cartridges.
- the identification code also includes information describing characteristics of liquid 20 or 22, such as the chemical description of the same.
- an exemplary use for the present invention is dispensing liquids on substrate 42 in preparation for patterning substrate 42 employing imprint lithography techniques.
- exemplary liquids that may be dispensed by system 10 include liquids having one or more of the following ultra violet curable compositions :
- compositions also include stabilizers that are well known in the chemical art to increase the operational life, as well as initiators.
- the initiators included in the aforementioned compositions are typically responsive to ultra-violet radiation to cause the compositions to solidify once exposed to ultra violet radiation.
- cartridges 16 and 18, as well as conduits 30, 32 and 38 through which liquid 20 and 22 propagate are opaque to ultra-violet radiation.
- system 10 may be enclosed within a housing (not shown) to shield the same from ultra violet radiation.
- a user when seeking authorization to dispense liquid, a user operates on processing system 50 to generate a request to processing system 52 over communication link 54.
- the request includes the identification code recited in the indicia 56 or 58 and information concerning system 10, such as the name of the owner/lessee of system 10, as well as an identification number of system 10.
- indicia 56 and 58 may be visually perceivable with an unaided eye so that a user may enter the information contained therein into processing system 50 using user interface 51.
- indicia 56 and 58 may be machine readable, such as for example, a bar code reader.
- a reader 25 may be in data communication with indicia 56 and a reader 27 may be in data communication with indicia 58.
- Processing system 52 then receives the request and determines whether authorization should be transmitted to processing system 50 to allow dispensing of liquid 20 or 22.
- processing system 52 includes a processor 52a, a memory 52b and a communication sub-system 52c both of which are in data communication with processor 52a.
- a user interface 53 which may consist of a keyboard, monitor, floppy disk drive system and other devices to interface a user with processor 52a.
- Memory 52b stores a database containing historical information concerning system 10.
- the historical information may include the name of the owner/lessee of sub-system 10b, a unique identifier of sub-system 10b, as well as information concerning previous cartridges ordered by the owner/lessee of sub-system 10b, such as the identification codes of the previously ordered cartridges, defining historical identification codes.
- the historical identification codes include historical data concerning characteristics of liquids contained in the previously ordered cartridges sent to the owner/lessee.
- processor 52a Upon receipt of the request, processor 52a operates on the request and memory 52b to compare the identification code and the system data with the historical information to determine whether to generate a requested authorization code in response.
- a requested authorization code is transmitted by processing system 52 to processing system 50 upon finding that the liquid 20 or 22 in cartridges 16 and 18, respectively, matches the liquid ordered by the owner/lessee of subsystem 10b and/or is not incompatible with liquids previously dispensed in sub-system 10b.
- identification code recited in indicia 56 is associated with cartridges, defining a verifiable identification code.
- the verifiable identification code includes data concerning characteristics of liquid 20, defining verifiable characteristic data.
- a request is received by processing system 52.
- the request includes the verifiable identification code and data concerning subsystem 10b, defining system data.
- the historical information includes a list of identification codes of cartridges sent to the owner/lessee of sub-system 10b. If the verifiable identification code does not match one of the historical identification codes, authorization is denied at step 106. Otherwise, a requested authorization code is transmitted to sub-system 10b at step 108. Were the requested authorization code transmitted to sub-system 10b, dispensing would commence at step 110.
- operation of system 10 in accordance with an alternate embodiment includes steps 200, 202, 204, 206, 208 and 210. Steps 200, 202, 206, 208 and 210 are identical to steps 100, 102, 106, 108 and 110, mentioned above with respect to Fig. 3. Referring again to Fig.
- step 204 it is determined whether the verifiable identification code and system data matches the historical data and fails to show any incompatibility with liquids previously dispensed in sub-system 10b. This is achieved by comparing the verifiable identification code and the system data to the database stored in memory 52b.
- the historical information includes a list of identification codes of cartridges sent to the owner/lessee of sub-system 10b. If the verifiable identification code does not match one of the historical identification codes, or does not indicate compatibility with liquids previously sent to the owner/lessee of sub-system 10b, then a requested authorization code is denied at step 206. Otherwise, a requested authorization code is transmitted to sub-system 10b at step 208.
- Sub-system 10b could verify the authenticity of the authorization code transmitted by comparing the same to a copy of the authorization code that is embedded in the program stored in memory 50b.
- Sub-system 10b could verify the authenticity of the authorization code transmitted by comparing the same to a copy of the authorization code that is embedded in the program stored in memory 50b.
- verification of compatibility and validity may be effectuated from an external computer, discussed above with respect to subsystem 10a.
- verification may be effectuated from an internal computer, such as processing system 50.
- a user may enter a security code in user interface 51.
- indicia 56 and 58 may be encoded with a security key.
- system 120 omits a second cartridge, such as cartridge 18, as well as receptacle 14.
- a liquid reservoir 118 containing liquid 122.
- Reservoir 118 may be selectively placed in fluid communication with liquid 20 contained in cartridge 16 with valve 130.
- Nozzle system 34 is in fluid communication with reservoir 118 via pump 36 and, optionally, filter 48.
- detector 26 senses when liquid 122 has reached a minimum level in reservoir 118 and produces a signal in response thereto.
- Processor 50a senses the signal produced by detector 26 and activated valve 130 to fill reservoir with liquid 20, which typically has the same chemical composition as liquid 122.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003243639A AU2003243639A1 (en) | 2002-07-09 | 2003-06-19 | System and method for dispensing liquids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US10/191,749 | 2002-07-09 | ||
US10/191,749 US6926929B2 (en) | 2002-07-09 | 2002-07-09 | System and method for dispensing liquids |
Publications (1)
Publication Number | Publication Date |
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WO2004006120A1 true WO2004006120A1 (en) | 2004-01-15 |
Family
ID=30114210
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2003/019258 WO2004006120A1 (en) | 2002-07-09 | 2003-06-19 | System and method for dispensing liquids |
Country Status (5)
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US (2) | US6926929B2 (en) |
AU (1) | AU2003243639A1 (en) |
MY (1) | MY136374A (en) |
TW (1) | TWI250386B (en) |
WO (1) | WO2004006120A1 (en) |
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- 2003-06-19 AU AU2003243639A patent/AU2003243639A1/en not_active Abandoned
- 2003-06-27 MY MYPI20032433A patent/MY136374A/en unknown
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Also Published As
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US20040010341A1 (en) | 2004-01-15 |
TWI250386B (en) | 2006-03-01 |
US20040241324A1 (en) | 2004-12-02 |
TW200407752A (en) | 2004-05-16 |
US7252715B2 (en) | 2007-08-07 |
US6926929B2 (en) | 2005-08-09 |
MY136374A (en) | 2008-09-30 |
AU2003243639A1 (en) | 2004-01-23 |
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