US20040135849A1 - Low cost high performance thermal ink jet printhead - Google Patents
Low cost high performance thermal ink jet printhead Download PDFInfo
- Publication number
- US20040135849A1 US20040135849A1 US10/342,724 US34272403A US2004135849A1 US 20040135849 A1 US20040135849 A1 US 20040135849A1 US 34272403 A US34272403 A US 34272403A US 2004135849 A1 US2004135849 A1 US 2004135849A1
- Authority
- US
- United States
- Prior art keywords
- die module
- ink jet
- manifold
- set forth
- dispensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000853 adhesive Substances 0.000 claims abstract description 23
- 230000001070 adhesive effect Effects 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 21
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical class C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 9
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 239000000565 sealant Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 14
- 239000010931 gold Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14072—Electrical connections, e.g. details on electrodes, connecting the chip to the outside...
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14024—Assembling head parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48464—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area also being a ball bond, i.e. ball-to-ball
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01079—Gold [Au]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01087—Francium [Fr]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49401—Fluid pattern dispersing device making, e.g., ink jet
Definitions
- the present invention relates to the image rendering arts. It finds particular application in conjunction with thermal ink jet printheads, and will be described with particular reference thereto. However, it is to be appreciated that the present invention is also amenable to other like applications.
- thermal ink jet printheads typically involves numerous complicated steps both inside and outside of a clean room. Among the process steps are a plurality of precise adhesive placements and position alignments are performed in the clean room. More specifically, constituent components of the printhead assembly have adhesives applied, are aligned and pressed together, and the adhesives cured in a heater. Typically, each separate component is bonded and cured in a separate step.
- U.S. Pat. No. 6,229,114 to Andrews, et al. describes the construction of a thermal ink jet printhead, and is herein incorporated by reference.
- a die bond epoxy is applied to the bottom side of a die module 1 .
- the die module 1 is then precisely aligned and assembled to a substrate 2 , in the case of Andrews, a heat sink.
- the die bond is cured in an oven for approximately 45 minutes or longer.
- wire bonds 3 are applied between a printed wiring board 4 on said substrate 2 and an electrical contact portion of the die module 1 .
- An adhesion promoter is applied to the top surface of die module 1 .
- a tack fluid seal 5 is precisely located and applied to one surface of the ink manifold assembly 6 .
- the die module 1 and substrate 2 assembly and the manifold 6 an fluid seal 5 assembly are then precisely located to each other and are merged together and a UV adhesive is applied and cured.
- the tack fluid seal is cured in an oven for approximately 45 minutes or longer.
- An encapsulation adhesive is then injected into the assembly to protect the wire bonds 3 from oxidation.
- a faceplate 7 is adhered to the operative surface of the printhead.
- the printhead is subjected to an additional final cure, along with a series of integrity tests.
- a daughter board 10 carries a thermal ink jet printhead 12 .
- a portion of daughter board electrodes 14 are carried entirely on the facing side of the daughter board 10 , and another portion of the electrodes 14 are carried partially on the reverse side of the daughter board 10 , switching sides at inversion points 15 .
- daughter board electrodes 14 are connected to individual printhead electrodes 16 .
- the printhead electrodes 16 are carried upon a substrate 18 , as best seen in FIGS. 4 and 5.
- Wire bonds 20 are used to connect between each daughter board electrode 14 and its corresponding printhead electrode 16 counterpart. The wire bonds are installed with a standard wire bonding process as is known in the art.
- Each printhead electrode 16 is connected to a heating element 22 (FIG. 5).
- a plurality of heating elements 22 are situated side by side along a front edge 24 of the substrate 18 .
- An etched manifold 26 is precision aligned with the substrate 18 such that etched grooves 28 in the manifold 26 align precisely with the heating elements 22 , defining ink jet channels between the manifold 26 and the substrate 18 .
- Internal pathways and capillaries within the manifold allow ink from a supply aperture 30 to flow into each of the ink jet channels.
- the present invention is suited for applications wherein a heat sink substrate is not needed and thermal control of the printhead is accomplished through other means known in the art.
- the present invention contemplates a new and improved method and apparatus that replaces the wire bonds, and condenses other bonding steps with a single step or process, overcoming the above referenced problems, and others.
- a method of assembling an ink jet printhead is provided.
- a printed wiring board is attached to an ink jet manifold.
- a die module is simultaneously attached to the manifold and the printed wiring board. Adhesives used to bond the die module to the printed wiring board and the manifold are simultaneously cured.
- a method of constructing an ink jet cartridge is provided.
- a fluid seal is dispensed on a first portion of a die module.
- An isotropic conductive adhesive is dispensed on a second portion of the die module containing a series of bumped electrical contacts.
- a single component is aligned with the die module, the component including a first, ink jet manifold section and a second, printed wiring board section. The die module and single component are moved into engagement, whereby a fluid seal connection is made, and an electrical connection is made in a single processing step.
- a thermal ink jet cartridge includes a manifold and a printed substrate attached to the manifold.
- a die module single component that includes the manifold and the substrate is attached to at least a printed daughter board, the die module being at least partially attached with a flip chip bumping process.
- One advantage of the present invention resides in simplified construction of an ink jet printhead.
- Another advantage of the present invention resides in a more robust electrical bond.
- Another advantage resides in reduced manufacturing costs.
- the invention may take form in various components and arrangements of components, and in various steps and arrangements of steps.
- the drawings are only for purposes of illustrating preferred embodiments and are not to be construed as limiting the invention.
- FIG. 1 is a prior art representation of a section view of a typical thermal ink jet printhead.
- FIG. 2 is a prior art representation of a daughter board with a printhead attached thereupon, in accordance with the present invention
- FIG. 3 is a prior art representation of a close up view of an end of the daughter board of FIG. 2, with the printhead;
- FIG. 4 is a prior art perspective view of the printhead and daughter board of FIGS. 2 and 3;
- FIG. 5 is a prior art head-on cross-sectional view of the printhead and daughter board of FIGS. 2 - 4 ;
- FIG. 6 is a head-on view of a print head and daughter board prior to assembly, in accordance with the present invention.
- FIG. 7 is a top-down view of a printhead and daughter board in accordance with the present invention.
- FIG. 8 is an exploded view of the printhead and daughter board of FIG. 7;
- FIG. 9 is a perspective view of a printhead assembly prior to an engagement step, in accordance with the present invention.
- FIG. 10 is an engaged view of the assembly of FIG. 9.
- a printed wiring board portion such as a daughter board 50 is provided with a manifold portion 52 as a single component.
- a possible board applicable to this embodiment is a single sided punched FR-4 board.
- the daughter board 50 and the manifold portion 52 are attached using insert molding or staking in this embodiment. It is to be understood that other attachment means are also applicable to the present embodiment.
- a plurality of daughter board electrodes 54 are printed upon the daughter board portion 50 , the electrodes 54 corresponding to counterpart die module electrodes 56 carried on a die module 58 .
- the die module 58 also carries other typical components of a standard ink jet printhead, as are known in the art, including, but not limited to the heating elements, ink channels, an ink reservoir, etc.
- the die module 58 is bonded to a component 53 , which includes the daughter board portion 50 and manifold portion 52 in a single connection step. It is to be understood that either the die module 58 can be brought into contact with the component 53 or vice versa, that is, the component 53 can be brought into contact with the die module 58 .
- a connecting material such as, but not limited to, a gold (Au) bump 60 is applied to each electrode 56 on the die module 58 , preferably via an industry standard practice of wafer-level ball bonding. After the gold bumps are applied, an isotropic conductive adhesive (ICA) 62 is applied to each of the bumps 60 .
- Au gold
- ICA isotropic conductive adhesive
- the ICA 62 is applied in microdots to each of the gold bumps 60 as is typical in a flip chip bonding process. It is to be understood that other adhesives may also be used in other manners within the concepts of the present application. It is also to be understood that the gold bumps 60 and the ICA 62 can be applied to the contacts 54 of the daughter board 50 rather than the contacts 56 of the die module 58 .
- a fluid seal adhesive 64 is applied to a surface of the die module 58 , more specifically, the surface that comes into contact with the manifold portion 52 .
- the fluid seal 64 can be a single component flexible epoxy with a low cure temperature, however, other materials such as silicones and the like are also applicable. It is to be understood that the fluid seal 62 can be applied to the manifold portion 52 instead of the die module, or can be applied to both surfaces.
- the fluid seal material may be applied as microdots or in any other appropriate manner.
- the die module undergoes a precision aligning step that precisely aligns the electrodes 54 of the daughter board portion 50 with the electrodes 56 of the die module 58 .
- the die module 58 is then simultaneously brought into contact with both the daughter board portion 50 and the manifold portion 52 , connecting the electrodes 54 and 56 .
- the manifold portion 52 can be designed so that it contains a full perimeter capping surface that is partially set back from the die module. Utilizing such a capping surface renders it unnecessary to assemble a separate face plate.
- a daughter board 70 carries a plurality of daughter board electrodes 72 on an upper surface thereof.
- a printhead substrate 74 carries an additional plurality of substrate electrodes 76 , also on an upper surface thereof.
- An ink jet manifold 78 is bonded to the upper surface of the substrate 74 .
- the manifold 78 is precision aligned with the substrate 74 .
- Grooves in the manifold 78 are aligned precisely with resistive heating elements 80 at the end of each substrate electrode 76 defining ink jet channels when the manifold 78 is bonded to the substrate 74 .
- the substrate electrodes 76 pass through the substrate 74 at inversion points 82 .
- Underside contacts (not shown) provide an electrical connection between the substrate electrodes 76 and the daughter board electrodes 72 .
- the underside contacts are connected to the daughter board electrodes 72 using the solder ball bumping process as previously discussed.
- the gold bumps and the ICA microdots are applied to the underside contacts.
- the fluid seal microdots are also applied to an underside of the substrate 74 , the underside being opposite an upper side 84 of the substrate 74 .
- the manifold 78 /substrate 74 assembly is aligned with the daughter board 70 such that the underside contacts align with the daughter board electrodes 72 .
- the ICA and the fluid sealant are simultaneously bonded to the daughter board 70 .
- the bonds are cured in an oven as discussed previously.
- a component 90 which includes a daughter board portion 92 and a manifold portion 94 , is bonded to a die module 96 .
- the aforementioned manifold portion 94 , daughter board portion 92 , and die module 96 can be constructed similarly to the components in FIGS. 4 and 5.
- the daughter board portion 92 carries a plurality of electrodes 98 that are in electronic communication with the printer.
- the die module 96 carries electrodes 100 that are in electrical communication with a plurality of heating elements 102 embedded on a surface of the die module 96 .
- Embedded electrical connections 103 are connected between the electrodes 100 and the heating elements.
- the heating elements 102 are evenly spaced along the surface of the die module 102 . Etched into the manifold 94 are a plurality of ink jet channels 104 that are spaced equally to the spacing of the heating elements 102 . It is to be understood that he electrodes 98 can be on the same horizontal level as the ink jet channels 104 and the electrodes 100 can be on the same horizontal level as the heating elements 102 . The present embodiment staggers the levels of these components to simplify an alignment process.
- Microdots of fluid seal adhesive 106 are applied to the surface of the die module 96 that carries the heating elements 102 .
- microdots of ICA are applied to the die module electrodes 100 , which were previously prepared for a solder bumping process, as described previously. It is to be understood that the fluid seal 106 and the ICA can be applied as set forth previously, or applied to the facing surfaces of the component 90 , or a combination of both.
- a single precision alignment is performed.
- the electrodes 98 , 100 are aligned and the heating elements 102 and the ink jet channels 104 are aligned.
- the component 90 is brought into physical contact with the die module 96 , as shown in FIG. 10 creating a bond therebetween.
- the die module 96 can be moved to contact the component 90 .
- the electrodes 98 , 100 are brought into electrical contact, and each ink jet channel 104 is positioned directly atop a heating element 102 .
- the ICA and fluid seal bonds are then cured in an oven.
Abstract
Description
- The present invention relates to the image rendering arts. It finds particular application in conjunction with thermal ink jet printheads, and will be described with particular reference thereto. However, it is to be appreciated that the present invention is also amenable to other like applications.
- Typically, the manufacturing of thermal ink jet printheads involves numerous complicated steps both inside and outside of a clean room. Among the process steps are a plurality of precise adhesive placements and position alignments are performed in the clean room. More specifically, constituent components of the printhead assembly have adhesives applied, are aligned and pressed together, and the adhesives cured in a heater. Typically, each separate component is bonded and cured in a separate step.
- More specifically to the prior art, U.S. Pat. No. 6,229,114 to Andrews, et al. describes the construction of a thermal ink jet printhead, and is herein incorporated by reference. First, in the clean room, a die bond epoxy is applied to the bottom side of a
die module 1. Thedie module 1 is then precisely aligned and assembled to asubstrate 2, in the case of Andrews, a heat sink. Next, the die bond is cured in an oven for approximately 45 minutes or longer. After the die bond is set,wire bonds 3 are applied between a printed wiring board 4 on saidsubstrate 2 and an electrical contact portion of thedie module 1. An adhesion promoter is applied to the top surface of diemodule 1. Atack fluid seal 5 is precisely located and applied to one surface of theink manifold assembly 6. Thedie module 1 andsubstrate 2 assembly and themanifold 6 anfluid seal 5 assembly are then precisely located to each other and are merged together and a UV adhesive is applied and cured. The tack fluid seal is cured in an oven for approximately 45 minutes or longer. An encapsulation adhesive is then injected into the assembly to protect thewire bonds 3 from oxidation. Afaceplate 7 is adhered to the operative surface of the printhead. - Once assembled, the printhead is subjected to an additional final cure, along with a series of integrity tests.
- U.S. Pat. No. 4,601,777 to Hawkins, et al. describes an alternate method for constructing a thermal ink jet printhead, and is herein incorporated by reference. With reference to FIGS. 2 through 5 of the present application, aspects of existing manufacturing processes are illustrated. In FIG. 2, a
daughter board 10 carries a thermalink jet printhead 12. A portion ofdaughter board electrodes 14 are carried entirely on the facing side of thedaughter board 10, and another portion of theelectrodes 14 are carried partially on the reverse side of thedaughter board 10, switching sides atinversion points 15. As seen in FIG. 3,daughter board electrodes 14 are connected toindividual printhead electrodes 16. Theprinthead electrodes 16 are carried upon asubstrate 18, as best seen in FIGS. 4 and 5.Wire bonds 20 are used to connect between eachdaughter board electrode 14 and itscorresponding printhead electrode 16 counterpart. The wire bonds are installed with a standard wire bonding process as is known in the art. - Each
printhead electrode 16 is connected to a heating element 22 (FIG. 5). A plurality ofheating elements 22 are situated side by side along afront edge 24 of thesubstrate 18. Anetched manifold 26 is precision aligned with thesubstrate 18 such that etchedgrooves 28 in themanifold 26 align precisely with theheating elements 22, defining ink jet channels between themanifold 26 and thesubstrate 18. Internal pathways and capillaries within the manifold allow ink from asupply aperture 30 to flow into each of the ink jet channels. - The present invention is suited for applications wherein a heat sink substrate is not needed and thermal control of the printhead is accomplished through other means known in the art. The present invention contemplates a new and improved method and apparatus that replaces the wire bonds, and condenses other bonding steps with a single step or process, overcoming the above referenced problems, and others.
- In accordance with one aspect of the present invention, a method of assembling an ink jet printhead is provided. A printed wiring board is attached to an ink jet manifold. A die module is simultaneously attached to the manifold and the printed wiring board. Adhesives used to bond the die module to the printed wiring board and the manifold are simultaneously cured.
- In accordance with another aspect of the present invention, a method of constructing an ink jet cartridge is provided. A fluid seal is dispensed on a first portion of a die module. An isotropic conductive adhesive is dispensed on a second portion of the die module containing a series of bumped electrical contacts. A single component is aligned with the die module, the component including a first, ink jet manifold section and a second, printed wiring board section. The die module and single component are moved into engagement, whereby a fluid seal connection is made, and an electrical connection is made in a single processing step.
- In accordance with another aspect of the present invention, a thermal ink jet cartridge is provided. The cartridge includes a manifold and a printed substrate attached to the manifold. A die module single component that includes the manifold and the substrate is attached to at least a printed daughter board, the die module being at least partially attached with a flip chip bumping process.
- One advantage of the present invention resides in simplified construction of an ink jet printhead.
- Another advantage of the present invention resides in a more robust electrical bond.
- Another advantage resides in reduced manufacturing costs.
- Still further advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading and understanding the following detailed description of the preferred embodiments.
- The invention may take form in various components and arrangements of components, and in various steps and arrangements of steps. The drawings are only for purposes of illustrating preferred embodiments and are not to be construed as limiting the invention.
- FIG. 1 is a prior art representation of a section view of a typical thermal ink jet printhead.
- FIG. 2 is a prior art representation of a daughter board with a printhead attached thereupon, in accordance with the present invention;
- FIG. 3 is a prior art representation of a close up view of an end of the daughter board of FIG. 2, with the printhead;
- FIG. 4 is a prior art perspective view of the printhead and daughter board of FIGS. 2 and 3;
- FIG. 5 is a prior art head-on cross-sectional view of the printhead and daughter board of FIGS.2-4;
- FIG. 6 is a head-on view of a print head and daughter board prior to assembly, in accordance with the present invention;
- FIG. 7 is a top-down view of a printhead and daughter board in accordance with the present invention;
- FIG. 8 is an exploded view of the printhead and daughter board of FIG. 7;
- FIG. 9 is a perspective view of a printhead assembly prior to an engagement step, in accordance with the present invention;
- FIG. 10 is an engaged view of the assembly of FIG. 9.
- With reference to FIG. 6, shown is a simplified diagram representing an embodiment for a manufacturing process which implements concepts of the present application. A printed wiring board portion, such as a
daughter board 50 is provided with amanifold portion 52 as a single component. A possible board applicable to this embodiment is a single sided punched FR-4 board. Thedaughter board 50 and themanifold portion 52 are attached using insert molding or staking in this embodiment. It is to be understood that other attachment means are also applicable to the present embodiment. A plurality ofdaughter board electrodes 54 are printed upon thedaughter board portion 50, theelectrodes 54 corresponding to counterpart diemodule electrodes 56 carried on adie module 58. Thedie module 58 also carries other typical components of a standard ink jet printhead, as are known in the art, including, but not limited to the heating elements, ink channels, an ink reservoir, etc. - The
die module 58 is bonded to a component 53, which includes thedaughter board portion 50 andmanifold portion 52 in a single connection step. It is to be understood that either thedie module 58 can be brought into contact with the component 53 or vice versa, that is, the component 53 can be brought into contact with thedie module 58. Particularly, a connecting material such as, but not limited to, a gold (Au) bump 60 is applied to eachelectrode 56 on thedie module 58, preferably via an industry standard practice of wafer-level ball bonding. After the gold bumps are applied, an isotropic conductive adhesive (ICA) 62 is applied to each of thebumps 60. In the present embodiment, theICA 62 is applied in microdots to each of the gold bumps 60 as is typical in a flip chip bonding process. It is to be understood that other adhesives may also be used in other manners within the concepts of the present application. It is also to be understood that the gold bumps 60 and theICA 62 can be applied to thecontacts 54 of thedaughter board 50 rather than thecontacts 56 of thedie module 58. - In the same ICA dispensing step, a
fluid seal adhesive 64 is applied to a surface of thedie module 58, more specifically, the surface that comes into contact with themanifold portion 52. Thefluid seal 64 can be a single component flexible epoxy with a low cure temperature, however, other materials such as silicones and the like are also applicable. It is to be understood that thefluid seal 62 can be applied to themanifold portion 52 instead of the die module, or can be applied to both surfaces. The fluid seal material may be applied as microdots or in any other appropriate manner. The die module undergoes a precision aligning step that precisely aligns theelectrodes 54 of thedaughter board portion 50 with theelectrodes 56 of thedie module 58. Thedie module 58 is then simultaneously brought into contact with both thedaughter board portion 50 and themanifold portion 52, connecting theelectrodes manifold portion 52 can be designed so that it contains a full perimeter capping surface that is partially set back from the die module. Utilizing such a capping surface renders it unnecessary to assemble a separate face plate. Once thedaughter board portion 50, themanifold portion 52, and thedie module 58 are bonded together, the bonds are simultaneously cured in an oven, as is known in the art. It is to be understood that variances on the curing process are possible, such as local heaters set to different temperatures, local heaters heating for different amounts of time, microwave ovens, and the like. - In another embodiment, with reference to FIG. 7, a
daughter board 70 carries a plurality ofdaughter board electrodes 72 on an upper surface thereof. Aprinthead substrate 74 carries an additional plurality ofsubstrate electrodes 76, also on an upper surface thereof. Anink jet manifold 78 is bonded to the upper surface of thesubstrate 74. - With reference to FIG. 8, and with continuing reference to FIG. 7, the manifold78 is precision aligned with the
substrate 74. Grooves in the manifold 78 are aligned precisely withresistive heating elements 80 at the end of eachsubstrate electrode 76 defining ink jet channels when the manifold 78 is bonded to thesubstrate 74. Thesubstrate electrodes 76 pass through thesubstrate 74 at inversion points 82. Underside contacts (not shown) provide an electrical connection between thesubstrate electrodes 76 and thedaughter board electrodes 72. The underside contacts are connected to thedaughter board electrodes 72 using the solder ball bumping process as previously discussed. The gold bumps and the ICA microdots are applied to the underside contacts. In this application stage, the fluid seal microdots are also applied to an underside of thesubstrate 74, the underside being opposite anupper side 84 of thesubstrate 74. - Next, the manifold78/
substrate 74 assembly is aligned with thedaughter board 70 such that the underside contacts align with thedaughter board electrodes 72. The ICA and the fluid sealant are simultaneously bonded to thedaughter board 70. The bonds are cured in an oven as discussed previously. - In another embodiment, and with reference to FIG. 9, a
component 90, which includes adaughter board portion 92 and amanifold portion 94, is bonded to adie module 96. Theaforementioned manifold portion 94,daughter board portion 92, and diemodule 96 can be constructed similarly to the components in FIGS. 4 and 5. Thedaughter board portion 92 carries a plurality ofelectrodes 98 that are in electronic communication with the printer. Thedie module 96 carrieselectrodes 100 that are in electrical communication with a plurality ofheating elements 102 embedded on a surface of thedie module 96. Embeddedelectrical connections 103 are connected between theelectrodes 100 and the heating elements. Theheating elements 102 are evenly spaced along the surface of thedie module 102. Etched into the manifold 94 are a plurality ofink jet channels 104 that are spaced equally to the spacing of theheating elements 102. It is to be understood that heelectrodes 98 can be on the same horizontal level as theink jet channels 104 and theelectrodes 100 can be on the same horizontal level as theheating elements 102. The present embodiment staggers the levels of these components to simplify an alignment process. - Microdots of fluid seal adhesive106 are applied to the surface of the
die module 96 that carries theheating elements 102. In the same dispensing step, microdots of ICA are applied to thedie module electrodes 100, which were previously prepared for a solder bumping process, as described previously. It is to be understood that thefluid seal 106 and the ICA can be applied as set forth previously, or applied to the facing surfaces of thecomponent 90, or a combination of both. - A single precision alignment is performed. In this step, the
electrodes heating elements 102 and theink jet channels 104 are aligned. Thecomponent 90 is brought into physical contact with thedie module 96, as shown in FIG. 10 creating a bond therebetween. Alternately, thedie module 96 can be moved to contact thecomponent 90. Theelectrodes ink jet channel 104 is positioned directly atop aheating element 102. The ICA and fluid seal bonds are then cured in an oven. - The invention has been described with reference to the preferred embodiments. Obviously, modifications and alterations will occur to others upon reading and understanding the preceding detailed description. It is intended that the invention be construed as including all such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/342,724 US6767079B1 (en) | 2003-01-15 | 2003-01-15 | Low cost high performance thermal ink jet printhead |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/342,724 US6767079B1 (en) | 2003-01-15 | 2003-01-15 | Low cost high performance thermal ink jet printhead |
Publications (2)
Publication Number | Publication Date |
---|---|
US20040135849A1 true US20040135849A1 (en) | 2004-07-15 |
US6767079B1 US6767079B1 (en) | 2004-07-27 |
Family
ID=32711792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/342,724 Expired - Fee Related US6767079B1 (en) | 2003-01-15 | 2003-01-15 | Low cost high performance thermal ink jet printhead |
Country Status (1)
Country | Link |
---|---|
US (1) | US6767079B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060132543A1 (en) * | 2004-12-20 | 2006-06-22 | Palo Alto Research Center Incorporated | Low cost piezo printhead based on microfluidics in printed circuit board and screen-printed piezoelectrics |
US20070130536A1 (en) * | 2005-12-05 | 2007-06-07 | Inventec Corporation | Interface display system and method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9406314B1 (en) | 2012-10-04 | 2016-08-02 | Magnecomp Corporation | Assembly of DSA suspensions using microactuators with partially cured adhesive, and DSA suspensions having PZTs with wrap-around electrodes |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3524497A (en) * | 1968-04-04 | 1970-08-18 | Ibm | Heat transfer in a liquid cooling system |
US4532530A (en) * | 1984-03-09 | 1985-07-30 | Xerox Corporation | Bubble jet printing device |
US4579469A (en) * | 1984-03-24 | 1986-04-01 | Honeywell Information Systems Italia | Cooling apparatus for dot matrix printing head |
US4601777A (en) * | 1985-04-03 | 1986-07-22 | Xerox Corporation | Thermal ink jet printhead and process therefor |
US4638337A (en) * | 1985-08-02 | 1987-01-20 | Xerox Corporation | Thermal ink jet printhead |
US4704620A (en) * | 1985-09-04 | 1987-11-03 | Canon Kabushiki Kaisha | Temperature control system and ink jet printer utilizing the temperature control system |
US4774630A (en) * | 1985-09-30 | 1988-09-27 | Microelectronics Center Of North Carolina | Apparatus for mounting a semiconductor chip and making electrical connections thereto |
US4791440A (en) * | 1987-05-01 | 1988-12-13 | International Business Machine Corporation | Thermal drop-on-demand ink jet print head |
US4831390A (en) * | 1988-01-15 | 1989-05-16 | Xerox Corporation | Bubble jet printing device with improved printhead heat control |
US4896172A (en) * | 1987-11-20 | 1990-01-23 | Canon Kabushiki Kaisha | Liquid injection recording apparatus including recording liquid circulation control |
US5017941A (en) * | 1989-11-06 | 1991-05-21 | Xerox Corporation | Thermal ink jet printhead with recirculating cooling system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5257043A (en) * | 1991-12-09 | 1993-10-26 | Xerox Corporation | Thermal ink jet nozzle arrays |
US5255022A (en) * | 1992-04-02 | 1993-10-19 | Xerox Corporation | Ink manifold having elastomer channel plate for ink jet printhead and process for making |
JPH07156409A (en) | 1993-10-04 | 1995-06-20 | Xerox Corp | Ink jet printing head with integrally formed flow path structure and its production |
US5491364A (en) * | 1994-08-31 | 1996-02-13 | Delco Electronics Corporation | Reduced stress terminal pattern for integrated circuit devices and packages |
US5665249A (en) * | 1994-10-17 | 1997-09-09 | Xerox Corporation | Micro-electromechanical die module with planarized thick film layer |
US5565901A (en) * | 1994-11-08 | 1996-10-15 | Xerox Corporation | Self-aligned features for accurate etched silicon transducer placement |
GB9515337D0 (en) * | 1995-07-26 | 1995-09-20 | Xaar Ltd | Pulsed droplet deposition apparatus |
US5681757A (en) * | 1996-04-29 | 1997-10-28 | Microfab Technologies, Inc. | Process for dispensing semiconductor die-bond adhesive using a printhead having a microjet array and the product produced by the process |
US5850234A (en) * | 1997-01-21 | 1998-12-15 | Xerox Corporation | Ink jet printhead with improved operation |
US6229114B1 (en) | 1999-09-30 | 2001-05-08 | Xerox Corporation | Precision laser cutting of adhesive members |
US6388231B1 (en) * | 2000-06-15 | 2002-05-14 | Xerox Corporation | Systems and methods for controlling depths of a laser cut |
US6548895B1 (en) * | 2001-02-21 | 2003-04-15 | Sandia Corporation | Packaging of electro-microfluidic devices |
-
2003
- 2003-01-15 US US10/342,724 patent/US6767079B1/en not_active Expired - Fee Related
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3524497A (en) * | 1968-04-04 | 1970-08-18 | Ibm | Heat transfer in a liquid cooling system |
US4532530A (en) * | 1984-03-09 | 1985-07-30 | Xerox Corporation | Bubble jet printing device |
US4579469A (en) * | 1984-03-24 | 1986-04-01 | Honeywell Information Systems Italia | Cooling apparatus for dot matrix printing head |
US4601777A (en) * | 1985-04-03 | 1986-07-22 | Xerox Corporation | Thermal ink jet printhead and process therefor |
US4638337A (en) * | 1985-08-02 | 1987-01-20 | Xerox Corporation | Thermal ink jet printhead |
US4704620A (en) * | 1985-09-04 | 1987-11-03 | Canon Kabushiki Kaisha | Temperature control system and ink jet printer utilizing the temperature control system |
US4774630A (en) * | 1985-09-30 | 1988-09-27 | Microelectronics Center Of North Carolina | Apparatus for mounting a semiconductor chip and making electrical connections thereto |
US4791440A (en) * | 1987-05-01 | 1988-12-13 | International Business Machine Corporation | Thermal drop-on-demand ink jet print head |
US4896172A (en) * | 1987-11-20 | 1990-01-23 | Canon Kabushiki Kaisha | Liquid injection recording apparatus including recording liquid circulation control |
US4831390A (en) * | 1988-01-15 | 1989-05-16 | Xerox Corporation | Bubble jet printing device with improved printhead heat control |
US5017941A (en) * | 1989-11-06 | 1991-05-21 | Xerox Corporation | Thermal ink jet printhead with recirculating cooling system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060132543A1 (en) * | 2004-12-20 | 2006-06-22 | Palo Alto Research Center Incorporated | Low cost piezo printhead based on microfluidics in printed circuit board and screen-printed piezoelectrics |
US7347533B2 (en) | 2004-12-20 | 2008-03-25 | Palo Alto Research Center Incorporated | Low cost piezo printhead based on microfluidics in printed circuit board and screen-printed piezoelectrics |
US20070130536A1 (en) * | 2005-12-05 | 2007-06-07 | Inventec Corporation | Interface display system and method |
Also Published As
Publication number | Publication date |
---|---|
US6767079B1 (en) | 2004-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR0139614B1 (en) | Assembly structure and assembling method of flat type display device | |
JP3625925B2 (en) | Method for encapsulating conductive wires in a circuit | |
US9498950B2 (en) | Retaining structure of wiring member, liquid discharge head, liquid discharge device, and liquid discharge apparatus | |
JP3917678B2 (en) | Attaching the printhead to the cartridge | |
JP2012049398A (en) | Conductive joint structure, mounting structure, and conductive joining method | |
US6767079B1 (en) | Low cost high performance thermal ink jet printhead | |
JPH11268286A (en) | Ink jet head | |
JP6175798B2 (en) | Liquid ejection apparatus and flexible wiring board connection method | |
US7152957B2 (en) | Recording device board having a plurality of bumps for connecting an electrode pad and an electrode lead, liquid ejection head, and manufacturing method for the same | |
US20080280389A1 (en) | Camera module and method for assembling same | |
JP3972639B2 (en) | Method for joining components of inkjet head | |
US8342654B2 (en) | Liquid injection recording head | |
KR20030034214A (en) | Droplet deposition apparatus | |
JP5611878B2 (en) | Ink jet head and manufacturing method thereof | |
US7171748B2 (en) | Method of manufacturing a liquid jet recording head | |
JP2003305842A (en) | Inkjet recording head and method of manufacturing the same | |
JP2018176698A (en) | Liquid discharge head | |
US10357964B2 (en) | Microfluidic assembly and methods of forming same | |
JP5218725B2 (en) | Connection method | |
JP2006327002A (en) | Mounting apparatus and method for manufacturing liquid-delivering head | |
US8240817B2 (en) | Bonded housing and fluid ejector | |
JPH09123466A (en) | Manufacture of ink jet printer head | |
JP2007062312A (en) | Connection structure of flexible substrate, liquid droplet ejecting head, and liquid droplet ejector | |
JP2004351754A (en) | Ink jet recording head | |
JP2007307833A (en) | Inkjet recording head |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: XEROX CORPORATION, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOORE, STEVEN R.;REEL/FRAME:013689/0183 Effective date: 20021213 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, AS COLLATERAL AGENT, TEXAS Free format text: SECURITY AGREEMENT;ASSIGNOR:XEROX CORPORATION;REEL/FRAME:015134/0476 Effective date: 20030625 Owner name: JPMORGAN CHASE BANK, AS COLLATERAL AGENT,TEXAS Free format text: SECURITY AGREEMENT;ASSIGNOR:XEROX CORPORATION;REEL/FRAME:015134/0476 Effective date: 20030625 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20160727 |
|
AS | Assignment |
Owner name: XEROX CORPORATION, CONNECTICUT Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A. AS SUCCESSOR-IN-INTEREST ADMINISTRATIVE AGENT AND COLLATERAL AGENT TO JPMORGAN CHASE BANK;REEL/FRAME:066728/0193 Effective date: 20220822 |