WO2005021268A1 - 液体吐出ヘッド、液体吐出装置及び液体吐出ヘッドの製造方法 - Google Patents
液体吐出ヘッド、液体吐出装置及び液体吐出ヘッドの製造方法 Download PDFInfo
- Publication number
- WO2005021268A1 WO2005021268A1 PCT/JP2004/012240 JP2004012240W WO2005021268A1 WO 2005021268 A1 WO2005021268 A1 WO 2005021268A1 JP 2004012240 W JP2004012240 W JP 2004012240W WO 2005021268 A1 WO2005021268 A1 WO 2005021268A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heating element
- liquid
- wiring pattern
- layer
- printer head
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 155
- 239000010410 layer Substances 0.000 claims abstract description 143
- 239000011241 protective layer Substances 0.000 claims abstract description 80
- 238000001312 dry etching Methods 0.000 claims abstract description 46
- 238000000059 patterning Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims description 76
- 239000002184 metal Substances 0.000 claims description 76
- 238000005530 etching Methods 0.000 claims description 45
- 239000004065 semiconductor Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 23
- 230000003071 parasitic effect Effects 0.000 abstract description 18
- 238000001465 metallisation Methods 0.000 abstract 2
- 239000000976 ink Substances 0.000 description 67
- 239000000463 material Substances 0.000 description 39
- 239000007789 gas Substances 0.000 description 26
- 229910052581 Si3N4 Inorganic materials 0.000 description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 17
- 239000010703 silicon Substances 0.000 description 17
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 17
- 229910052782 aluminium Inorganic materials 0.000 description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 16
- 229910052801 chlorine Inorganic materials 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 7
- 125000001309 chloro group Chemical group Cl* 0.000 description 7
- 238000004544 sputter deposition Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000001039 wet etching Methods 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 5
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- RVSGESPTHDDNTH-UHFFFAOYSA-N alumane;tantalum Chemical compound [AlH3].[Ta] RVSGESPTHDDNTH-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- GDFCWFBWQUEQIJ-UHFFFAOYSA-N [B].[P] Chemical compound [B].[P] GDFCWFBWQUEQIJ-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- YOUIDGQAIILFBW-UHFFFAOYSA-J tetrachlorotungsten Chemical compound Cl[W](Cl)(Cl)Cl YOUIDGQAIILFBW-UHFFFAOYSA-J 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- B41J2/14088—Structure of heating means
- B41J2/14112—Resistive element
- B41J2/14129—Layer structure
-
- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/05—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers produced by the application of heat
-
- 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
- B41J2/16—Production of nozzles
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1601—Production of bubble jet print heads
- B41J2/1603—Production of bubble jet print heads of the front shooter type
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1626—Manufacturing processes etching
- B41J2/1628—Manufacturing processes etching dry etching
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1626—Manufacturing processes etching
- B41J2/1629—Manufacturing processes etching wet etching
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1631—Manufacturing processes photolithography
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1642—Manufacturing processes thin film formation thin film formation by CVD [chemical vapor deposition]
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1646—Manufacturing processes thin film formation thin film formation by sputtering
-
- 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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/13—Heads having an integrated circuit
Definitions
- Liquid Discharge Head Liquid Discharge Apparatus, and Method of Manufacturing Liquid Discharge Head
- the present invention relates to a liquid ejection head, a liquid ejection device, and a method for manufacturing a liquid ejection head, and can be applied to, for example, a thermal inkjet printer.
- a metal wiring according to a wiring pattern is formed by forming a wiring pattern by pattern jungling using dry etching and connecting the wiring pattern to a heating element through a contact portion formed by an opening provided in an insulating protection layer. Parasitic resistance due to the metal wiring layer can be reduced by sufficiently securing the thickness of the layer.
- color copying systems such as a sublimation thermal transfer system, a fusion heat transfer system, an ink jet system, an electrophotographic system, and a heat-developable silver salt system have been proposed.
- the ink jet method is a method in which droplets of a recording liquid (ink) fly from nozzles provided on a printer head, which is a liquid discharge head, and are attached to a recording target to form dots. Therefore, a high-quality image can be output with a simple configuration.
- the ink jet method is classified into an electrostatic attraction method, a continuous vibration generation method (piezo method), and a thermal method according to a method of flying ink droplets from a nozzle.
- the thermal method is a method in which bubbles are generated by local heating of the ink, and the bubbles are used to push out the ink from the nozzles and fly to the print target.
- a simple image is printed with a simple configuration.
- a heating element for heating ink is integrated with a driving circuit based on a logic integrated circuit for driving the heating element. Formed on top.
- the heating elements are arranged at a high density and can be reliably driven.
- heating elements in order to obtain high-quality printing results in this thermal printer, it is necessary to arrange heating elements at high density. Specifically, for example, in order to obtain printing results equivalent to 600 [DPI], it is necessary to arrange heating elements at intervals of 42.333 [ ⁇ ]. It is extremely difficult to arrange individual driving elements for heating elements arranged at a high density.
- switching transistors and the like are created on the semiconductor substrate and connected to the corresponding heating elements by integrated circuit technology.Furthermore, each switching transistor is similarly driven by a drive circuit created on the semiconductor substrate. By driving, each heating element can be easily and reliably driven.
- a thermal printer bubbles are generated in the ink by applying a predetermined power to the heating element, and the bubbles disappear when the ink jumps out of the nozzles. As a result, each time foaming and defoaming are repeated, a mechanical shock is applied by the cavitation. In addition, the printer repeats the temperature rise and fall due to the heat generated by the heat generating element in a short time [several seconds], which causes a large stress due to the temperature. Then, an insulating protective layer is formed on the heat generating element, and the heat generating element is protected from the ink by the insulating protective layer. Further, a metal protective layer is formed on the insulating protective layer. The metal protective layer reduces mechanical shock due to cavitation. The reaction is suppressed. As a result, the printer head is designed to protect the heating element with the insulating protective layer and the metal protective layer to ensure reliability.
- the constituent materials of the insulating protective layer and the metal protective layer and the film thickness of the constituent material are set according to the resistance value and the shape of the heating element, and the configuration is made by these settings.
- Printer heads Various conditions are required to drive the heating element and discharge ink in a stable manner, and the like, and the driving conditions of the heating element are set within the range of these conditions.
- an insulating protective layer composed of a silicon nitride film and a silicon carbide film is set in a range of 355 to 435 [nm] in thickness, and a rectangular wave-shaped drive signal is used for 1.
- a method of driving a heating element at 0 to 14 ⁇ J] has been proposed.
- an insulating protective layer made of a silicon nitride film is set in the range of 260-340 Cnm in thickness, and the insulating protective layer and the metal protective layer of the bracket Therefore, a method has been proposed in which the entire film thickness is set to 630 Cnm] or less, and the heating element is driven by a drive signal having a width of 1.2 ⁇ s] or less.
- the printer head having such a configuration is of a so-called face shutter type in which ink droplets are pushed out from nozzles provided on a heating element by the pressure of bubbles, and a semiconductor element is conventionally used as a heating element.
- a wiring pattern that is a metal wiring layer to be connected is formed by patterning the laminated wiring pattern material by a dry etching process and a wet etching process.
- this type of printer head 1 has an insulating layer (Si 2 ) or the like laminated on a semiconductor substrate 2 on which semiconductor elements are formed, and then generates heat. Element 3 is formed. Subsequently, as shown in FIG. 1 (B), a wiring pattern material layer 4 of aluminum or the like is deposited, and the wiring pattern material layer 4 is processed by a dry etching process to form a wiring pattern 5. You.
- the printer head 1 the wiring pattern 5 is created such that the wiring pattern material layer 4 on the heating element 3 is left.
- the printer head 1 has a photoresist layer 6 formed on the heating element 3 so as to be able to etch the remaining portion, and a chemical solution mainly containing phosphoric acid and nitric acid.
- the wiring pattern material layer 4 left on the heat generating element 3 is removed by an etching process using a silicon.
- the wiring pattern 5 and the heating element 3 overlap each other at the end of the heating element 3, and the heating element 3 is connected to the wiring pattern 5, as shown in FIG. 1 (D).
- Heating element 3 via wiring pattern 5 The heating element 3 is connected to a driven semiconductor element or the like.
- the printer head 1 although the heating element 3 and the wiring pattern 5 overlap with each other, a step is generated on the surface, but the end of the wiring pattern 5, which is the wall surface of the step, is tapered. Etching is performed so as to improve the coverage (step coverage) of the insulating protective layer 7 and the metal protective layer 8 which are sequentially formed in the upper portion of the wall surface portion.
- the printer head 1 has an insulating protective layer 7 made of silicon nitride (Si 3 N 4 ) or an insulating protective layer 7 made of silicon nitride and silicon carbide.
- a metal protective layer 8 is formed of 3-tantalum having a tetragonal structure.
- the printer head 1 is constructed such that the ink liquid chamber, the ink flow path, and the nozzle are formed by arranging predetermined members.
- the wiring pattern 5 is locally formed in an uneven shape in the wet etching step for exposing the heating element 3.
- the wiring pattern 5 is formed with a thickness of about 0.5 [; / m].
- the wet etching using a chemical solution prevents damage to the surface of the lower heating element 3 and allows selective patterning only of the wiring pattern material layer 4, but the wiring pattern to be processed
- the portion of the wall surface forming the step is unevenly etched, whereby the wiring pattern 5 on the wall portion of the printer head 1 is formed in an uneven shape.
- an insulating protective layer 7 and a metal protective layer 8 are sequentially formed on the wiring pattern 5 uniformly along the uneven shape of the wiring pattern 5.
- the wiring pattern is set in a range of 0.18 to 0.24 ⁇ ).
- Such a wall part Has been proposed to create a high precision.
- this technique is applied to reduce the thickness of the wiring pattern, such wall portions can be created with high precision as shown in Fig. 3 in comparison with Fig. 2.
- the weakness of the wiring pattern 5 itself becomes conspicuous, and the resistance value of the wiring pattern 5 increases.
- JP-A-2002-355971 when the wiring pattern 5 is formed with a film thickness of 0.2 ⁇ , the resistance value of the wiring pattern 5 and the resistance value of the wiring pattern 5 are added to the resistance value of the transistor.
- the parasitic resistance value occupies about 1/3 of the total resistance value for driving the heating element 3 to which the resistance value of the heating element 3 is added (53 [ ⁇ ]).
- the loss of power used to drive the heating element 3 increases due to the wiring resistance, and the ink There is a problem that the driving power of the heating element 3 related to the discharge of the ink increases.
- Japanese Patent Laid-Open Publication No. 2000-108355 proposes a method of forming a wiring pattern by etching only by a dry etching process.
- the printer head created by this method is a so-called edge-shutter type that pushes ink droplets out of nozzles formed at locations other than directly above the heating elements by propagating pressure waves due to the pressure of air bubbles.
- the heating element is made of polycrystalline silicon, there is no problem even if a step of about 2 to 3 ⁇ ] is generated on the heating element due to the insulating protection layer and the metal protection layer. is there.
- the present invention has been made in consideration of the above points, and a liquid discharge head capable of sufficiently securing the thickness of a metal wiring layer related to a wiring pattern and reducing parasitic resistance due to the metal wiring layer.
- An object of the present invention is to propose a liquid discharge device and a method of manufacturing a liquid discharge head.
- a heating element for heating a liquid held in a liquid chamber and a semiconductor element for driving the heating element are integrally held on a predetermined substrate, and a predetermined element is driven by driving the heating element.
- an insulating protective layer that protects the heating element from the liquid and a metal wiring layer that connects the semiconductor element to the heating element are sequentially provided on the liquid chamber side of the heating element.
- the metal wiring layer, which is disposed, is connected to the heating element via a contact portion formed by an opening provided in the insulating protection layer, and is formed by patterning by dry etching using an etching gas.
- a heating element that heats the liquid held in the liquid chamber and a semiconductor element that drives the heating element are integrally held on a predetermined substrate, and a predetermined nozzle is driven by driving the heating element.
- an insulating protective layer that protects the heating element from the liquid and a metal wiring layer that connects the semiconductor element to the heating element are sequentially provided on the liquid chamber side of the heating element.
- the metal wiring layer is arranged and connected to the heating element via a contact portion formed by an opening provided in the insulating protection layer, and is formed by patterning by dry etching using an etching gas, thereby forming a heating element using an etching gas. Damage to the metal wiring layer is prevented, and the wall surface of the step formed by the metal wiring layer is accurately formed. Thereby, the thickness of the metal wiring layer related to the wiring pattern can be sufficiently ensured, and the parasitic resistance due to the metal wiring layer can be reduced.
- the present invention is applied to a liquid ejection device that ejects a droplet by driving a heating element provided in a liquid ejection head, wherein a liquid ejection head heats a liquid held in a liquid chamber.
- a semiconductor element for driving the heating element is integrally held on a predetermined substrate, and an insulating protective layer for protecting the heating element from liquid is provided on the liquid chamber side of the heating element.
- a metal wiring layer for connecting the semiconductor element to the heating element is sequentially arranged. The metal wiring layer is connected to the heating element via a contact portion formed by an opening provided in the insulating protection layer, and is patterned by dry etching using an etching gas. To be formed.
- the configuration of the present invention it is possible to provide a liquid ejecting apparatus capable of sufficiently securing the thickness of the metal wiring layer related to the wiring pattern and reducing the parasitic resistance due to the metal wiring layer.
- a heating element for heating the liquid held in the liquid chamber and a semiconductor element for driving the heating element are integrally held on a predetermined substrate, and the liquid is supplied from a predetermined nozzle by driving the heating element.
- the configuration of the present invention it is possible to provide a method of manufacturing a liquid discharge head capable of sufficiently securing the thickness of a metal wiring layer relating to a wiring pattern and reducing parasitic resistance due to the metal wiring layer. it can. According to the present invention, it is possible to sufficiently secure the thickness of the metal wiring layer related to the wiring pattern and reduce the parasitic resistance due to the metal wiring layer.
- FIGS. 1 (A), 1 (B), 1 (C), 1 (D), and 1 (E) are cross-sectional views for explaining a conventional printer head. It is.
- FIG. 2 is a cross-sectional view for explaining patterning of a wiring pattern in the printer head of FIG.
- FIG. 3 is a cross-sectional view showing another example of the wiring pattern puttering.
- FIG. 4 is a perspective view showing a printer according to Embodiment 1 of the present invention.
- FIG. 5 is a plan view showing the arrangement of head chips in the printer head of FIG. FIG.
- FIG. 6 is a sectional view showing the printer head of FIG.
- 7 (A) and 7 (B) are cross-sectional views for explaining the steps of producing the printer head of FIG.
- FIG. 8 (A) and 8 (B) are cross-sectional views showing a continuation of FIG. 7 (B).
- 9 (A) and 9 (B) are cross-sectional views showing a continuation of FIG. 8 (B).
- FIG. 10 is a cross-sectional view showing a continuation of FIG. 9 (B).
- FIG. 11 is a cross-sectional view showing a continuation of FIG.
- FIG. 12 is a characteristic curve diagram for describing the ink ejection speed in the printer head of FIG.
- FIG. 13 (A), FIG. 13 (B), FIG. 13 (C), and FIG. 13 (D) are cross-sectional views for explaining the creation of a wiring pattern.
- FIGS. 14 (A), 14 (B), 14 (C), and 14 (D) show a printer head forming process applied to the printer according to the second embodiment of the present invention. It is sectional drawing for description. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 4 is a perspective view showing a printer according to Embodiment 1 of the present invention.
- the line printer 11 is formed by being housed in a rectangular housing 12 as a whole, and a paper tray 14 storing paper 13 to be printed is formed on a tray formed in front of the housing 12.
- the paper tray 14 is designed to feed paper 13 by being loaded from the entrance.
- paper 13 is fed by a predetermined mechanism.
- the paper 13 is pressed against the roller 15, and the rotation of the paper feed roller 15 causes the paper 13 to be sent out from the paper tray 14 toward the rear side of the line printer 11, as indicated by the arrow A.
- a reversing roller 16 is disposed on the paper feed side, and the rotation of the reversing roller 16 is Thus, as shown by arrow B, the feed direction of paper 13 is switched to the front direction.
- the line printer 11 is transported by the spur rollers 17 and the like so that the paper 13 whose paper feed direction is switched in the direction shown by the arrow B in this manner crosses the paper tray 14 and is moved by the arrow C. As shown, the paper is discharged from a discharge port arranged on the front side of the line printer 11.
- the head cartridge 18 is replaceably arranged as shown by an arrow D between the spur roller 17 and the discharge port.
- the head cartridge 18 has a printer head 19 in which yellow, magenta, cyan, and black line heads are arranged, and is arranged on the lower surface side of a holder 20 having a predetermined shape.
- the ink cartridges for yellow (Y), magenta (M), cyan (C), and black (B) are arranged so as to be exchangeable.
- the line printer 11 can print an image by applying ink to the paper 13 from the line heads corresponding to the respective color inks.
- FIG. 5 is an enlarged plan view of a part of the array configuration of the printer head as viewed from the paper 13 side in FIG.
- the printer head 19 is configured such that head chips 22 of the same configuration are alternately (in a staggered manner) arranged on the nozzle plate on both sides of the ink flow path 21 of each color ink. Is done.
- the heating element is arranged so as to be on the ink flow path 21 side, that is, the head chips 22 on both sides are oriented in the direction of 1 via the ink flow path 21 side. They are arranged so as to be rotated by 80 degrees.
- the printer head 19 can supply ink to each head chip 22 through one ink flow path 21 for each color, and accordingly, the printing accuracy can be increased with a simple configuration. It has been made possible.
- connection pad 24 changes in the direction in which the nozzles 23 that are minute ink ejection ports are arranged.
- the connection pad 24 is arranged almost at the center of the direction in which these nozzles 23 are arranged (printing width direction) so that the print heads 19 are adjacent to each other.
- the flexible wiring board connected to the connection pad 24 of the head chip 22 is prevented from approaching, that is, the concentration on a part of the flexible wiring board is prevented.
- Each head chip 22 is configured to be able to switch the driving order in the driving circuit so as to correspond to such a driving order.
- FIG. 6 is a sectional view showing a printer head applied to this line printer. After a plurality of head driving circuits, heating elements, and the like are formed on a silicon substrate wafer, the printer head 19 is scribed to each head chip 22, and each head chip 22 is provided with an ink liquid chamber. Etc. are formed.
- a silicon nitride film (Si 3 N 4 ) is deposited.
- the silicon substrate 31 is processed by a photolithography process and a reactive ion etching process, whereby the silicon nitride film is removed from a region other than a predetermined region forming a transistor.
- a silicon nitride film is formed in a region on the silicon substrate 31 where a transistor is to be formed.
- a thermal silicon oxide film having a thickness of 500 [nm] is formed in a region where the silicon nitride film has been removed by the thermal oxidation process, and the transistor is separated by the thermal silicon oxide film.
- (Local Oxidation Of Silicon) 32 is formed.
- the element isolation region 32 is finally formed to a thickness of 260 [nm] by the subsequent processing.
- a gate having a tungsten structure / polysilicon / thermal oxidation structure is formed in the transistor forming region.
- the silicon substrate 31 is processed by an ion implantation process and a heat treatment process for forming the source and drain regions, and MOS-type (Metal-Oxide-Semiconductor) type transistors 33, 34, etc. are formed.
- MOS-type (Metal-Oxide-Semiconductor) type transistors 33, 34, etc. are formed.
- switching transistor 3 Reference numeral 3 denotes an MS driver transistor having a withstand voltage of about 25 [V], which is used to drive a heating element.
- the switching transistor 34 is a transistor constituting an integrated circuit for controlling the driver transistor, and operates at a voltage of 5 [V].
- a low-concentration diffusion layer is formed between the gate and the drain, and the electric field of electrons accelerated at that portion is relaxed to secure a withstand voltage so that the dry transistor 33 is formed. Has been done.
- the printer head 19 is subsequently doped with phosphorus by a CVD (Chemical Vapor Deposition) method.
- a PSG (Phosphorus Silicate Glass) film which is a silicon oxide film
- a BPSG (Boron Phosphorus Silicate Glass) film which is a silicon oxide film to which boron and phosphorus are added, have a thickness of 100 nm (nm) and 500 nm, respectively. [Nm], thereby forming a first interlayer insulating film having a thickness of 600 [nm] as a whole.
- a titanium film having a film thickness of 30 [nm] a titanium nitride oxide metal film having a film thickness of 70 [nm]
- a film thickness of 30 [ nm] of titanium silicon added with 1 [at%] of aluminum, or copper added with 0.5 (at%) of aluminum is deposited in order with a thickness of 500 [nm].
- titanium nitride oxide which is an antireflection film, is deposited to a thickness of 25 [nrn], and a wiring pattern material is formed by these.
- the formed wiring pattern material is selectively removed, whereby the first wiring is formed by the metal wiring layer made of aluminum or aluminum with silicon or copper added.
- the line pattern 37 is created.
- the printer head 19 is connected to the MOS transistors 34 constituting the drive circuit by the first-layer wiring pattern 37 created in this manner.
- Logic integrated circuit is formed The
- TEOS a silicon oxide film which is an interlayer insulating film by (tetraethoxysilane S i (OC 2 H 5) 4) CVD method using a raw material gas is deposited. Subsequently, the printer head 19 is flattened by applying a coating type silicon oxide film including SOG (Spin On Glass) and etching back, and these steps are repeated twice.
- a second-layer interlayer insulating film (P--Sio) 38 of a 440-nm-thick silicon oxide film that insulates the first-layer wiring pattern 37 from the subsequent second-layer wiring pattern is formed.
- the printer head 19 is mounted on a sputter deposition chamber in a sputtering apparatus, and then has a thickness of 50 to 100 [nm] by a sputtering method.
- a tantalum film is deposited, whereby a resistor film is formed on the silicon substrate 31.
- the substrate temperature is 200 to 400 degrees
- the DC power is 2 to 4 [kW]
- the argon gas flow rate is 25 to 40 [scm].
- the photolithography process, a dry etching process using the BC 1 3 / C 1 2 gas, by a square shape, or a resistor film by the folding shape connecting one end by a wire pattern is
- the heating element 39 having a resistance value of 40 to 100 [ ⁇ ] is formed by selective removal.
- a resistor film having a thickness of 83 [nm] is deposited, and a heating element 39 is formed in a folded shape so that the resistance value of the heating element 39 becomes 100 [ ⁇ ]. Has been done.
- a silicon nitride film having a thickness of 300 [nm] is deposited on the printer head 19 by the CVD method as shown in FIG.
- the insulating protection layer 40 is formed.
- the silicon nitride film 40 at a predetermined position is removed by a photoresist process and a dry etching process using CHF 3 / CF 4 / Ar gas as shown in FIG. 8 (B).
- an opening is formed in the insulating protection layer 40 to form the contact portion 41.
- an opening is formed in the interlayer insulating film 38 by a dry etching process using CHF 3 ZCF 4 Ar gas to form a via hole 42.
- the contact portion 41 is a connection portion provided in a previous step of the second-layer wiring pattern in order to connect the second-layer wiring pattern to the lower-layer heating element 39. This is a connection portion provided in a previous step of the second-layer wiring pattern in order to connect the lower-layer wiring pattern to the lower-layer first-layer wiring pattern 37.
- the printer head 19 is then provided with a metal wiring layer made of an aluminum or silicon-added aluminum as shown in FIG. 9 (A).
- a wiring pattern material layer 43 is formed, and as shown in FIG. 9 (B), an extra portion of the wiring pattern material layer 43 is removed, thereby forming a second wiring pattern layer. 4 4 is putt ceremonies.
- the thickness of the metal wiring layer of the wiring pattern material layer 43 is set to 400 [nm] or more. ′ Therefore, in the patterning of the wiring pattern 44, the dry etching of the wiring pattern material layer 43 except for the area above the heating element 39 with an etching gas containing a chlorine atom component is performed simultaneously with the heating element 3. The wiring pattern material layer 43 on 9 is removed.
- a chlorine-based gas is excited to generate a plasma flow containing a chlorine radical species, and the plasma flow is irradiated to a processing target, thereby producing chlorine in the plasma.
- the object to be processed is reduced and removed by radical species, and is anisotropic etching in which the object to be processed is etched in a direction substantially perpendicular to the substrate.
- the wiring pattern material layer 43 is removed by the chlorine radical species in the plasma on the heating element 39, whereby the printer head 19 forms a step formed by the wiring pattern 44.
- the wall surface is formed with high accuracy, and the occurrence of voids at the interface with the insulating protective layer formed thereafter is prevented.
- the printer head 19 the wiring pattern material layer 43 on the heating element 39 is removed in this manner, and the insulating protection layer 40 related to the formation of the contact portion 41 is exposed.
- the printer head 19 is exposed to the plasma flow containing the chlorine radical species by exposing the insulating protective layer 40 to be etched by the chlorine radical species in the plasma.
- the insulating protection layer 40 functions as a mask for the heating element 39, and the heating element 39 is not directly exposed to the plasma flow containing the chlorine radical species, thereby preventing the surface of the heating element 39 from being etched.
- the heating element 39 is prevented from being damaged by dry etching by the insulating protection layer 40 formed in advance for forming the contact portion 41.
- the printer head 19 is made of a 200-nm-thick B-added titanium or silicon-added aluminum (1 at%) or a ⁇ -added 0.5 (at%)-added aluminum by sputtering. Deposited sequentially with a film thickness of 600 [nm]. Subsequently, in the printer head 19, titanium nitride oxide having a thickness of 25 [nm] is deposited, whereby an antireflection film is formed. Thus, in the printer head 19, the wiring pattern material layer 43 is formed by the metal wiring layer made of aluminum to which silicon or copper is added.
- the printer head 19 Following is the Photo lithography process, BC 1 3 / C 1 2 wiring pattern material layer 43 by a dry etching process using a gas is selectively removed, the second-layer wiring pattern 44 is created You.
- the etching time is set to be about 1.2 times as long as the etching time with respect to the film thickness of the wiring pattern material layer 43 in this dry etching step so as to perform over-etching. Then, the surplus wiring pattern material layer 43 is surely removed, and a short circuit between the wiring patterns due to the remaining wiring pattern material layer 43 is sufficiently prevented. ing.
- the silicon nitride film 40 having a thickness of 300 Cnm] formed in advance on the heating element 39 is etched by a thickness of 200 Cnm] to a thickness of 100 Cnm. ] Became.
- the thickness of the metal wiring layer relating to the wiring pattern 44 is formed to be 600 [nm], thereby preventing the metal wiring layer itself from being weakened and increasing the resistance value in the metal wiring layer. Is prevented.
- the resistance value of the metal wiring layer and the parasitic resistance value including the ON resistance of the transistor 34 were measured, the resistance value of the metal wiring layer was 1.5 [ ⁇ ].
- the parasitic resistance value including the on-resistance is 12 It was.
- the printer head 19 the parasitic resistance value of the total resistance value of the heating element 39 plus the resistance value of 100 [ ⁇ ] is reduced to about 1/9, and the parasitic resistance value is reduced compared to the past.
- the ratio of the parasitic resistance value to the total resistance value can be reduced by about 2/3 as compared with the printer head described with reference to FIG. 3 more specifically.
- the wiring pattern material layer 43 on the heating element 39 is simultaneously removed by a dry etching process using an etching gas. The time required to manufacture the printer head 19 has been reduced.
- a wiring pattern for power supply and a wiring pattern for grounding are formed by the wiring pattern 44 of the second layer formed in this manner, and the contact portion 41 and the via hole 4 are formed.
- a wiring pattern for connecting the driver transistor 3 4 to the heating element 39 via 2 is created.
- a silicon nitride film 45 having a thickness of 200 to 400 C nm] functioning as an insulating protective layer is deposited by a plasma CVD method. Further, in a heat treatment furnace, heat treatment is performed at 400 ° C. for 60 minutes in a nitrogen gas atmosphere to which 4% hydrogen has been added or in a 100% nitrogen gas atmosphere. . As a result, in the printer head 19, the operations of the transistors 33 and 34 are stabilized, and the connection between the wiring pattern 37 of the first layer and the wiring pattern 44 of the second layer is stabilized. Resistance is reduced.
- the printer head 19 is then mounted on a sputter deposition chamber in a DC magnetron 'sputtering apparatus as shown in FIG. 11, and then a metal protective layer material film of tantalum is formed by a sputtering method. It is deposited with a thickness of 100 to 300 [nm]. Then the printer head 1 9, the metal protective layer material film is masked to a desired shape by follower Torejisu preparative step, is etched by the mask by further de dry etching process using the BC 1 3 / C 1 2 gas, A metal protective layer 46 is formed. In the metal protective layer 46, tantalum aluminum (TaAl) with an aluminum content of about 15 [at%] may be used.
- TaAl tantalum aluminum
- the aluminum content was set to about 15 C at%].
- the specified tantalum aluminum has a structure in which aluminum exists at the crystal grain boundaries of tantalum, and the film stress can be reduced as compared with the case where a tantalum forms a metal protective layer.
- the silicon nitride film 45 is deposited on the silicon nitride film 40 thinned by the dry etching of the wiring pattern 44 in this manner, and the silicon nitride film 40, 45 An insulating protective layer is formed, and a metal protective layer 46 is further formed thereon.
- the heating element 39 is protected by the insulating protective layers 40 and 45 and the metal protective layer 46 to ensure reliability.
- the insulating protective layers 40 and 45 are used.
- the thickness of the metal protective layer 46 is set to be equal to or less than 700 [nm] as a whole.
- the measurement results shown in FIG. 12 were made with the thickness of the metal protective layer set to 200 [nm] so that the insulating protective layer and the metal protective layer as a whole have a thickness of 700 [nm] or less. It shows the ejection speed of ink droplets ejected from nozzles by driving heating elements with various driving powers in a printer head formed with different thicknesses of insulating protective layers.
- black circles indicate a printer head on which an insulating protective layer is formed with a thickness of 500 nm
- black squares indicate a thickness of 400 nm.
- the thickness of the insulating protective layer was reduced, the driving power to start ink ejection was reduced, and as shown by the broken line, the heat was generated by the rated driving power of 0.8 [W].
- the thicknesses of the insulating protection layers 40 and 45 and the metal protection layer 46 are respectively 500 [nm] and 200 [nm], and the heat of the heating element 39 is reduced. It is designed to efficiently propagate to ink.
- the printer head 19 corresponds to the ink liquid chamber 52 and the ink flow path. Is removed and then cured, whereby the partition walls of the ink liquid chamber 52 and the partition walls of the ink flow path 21 are formed.
- the nozzle plate 53 is laminated.
- the nozzle plate 53 is a plate-like member processed into a predetermined shape so as to form the nozzle 23 on the heating element 39, and is held on the dry film 51 by bonding.
- the printer head 19 is formed by forming the nozzle 23, the ink liquid chamber 52, the ink flow path 21 for guiding the ink to the ink liquid chamber 52, and the like.
- such an ink liquid chamber 52 is formed so as to be continuous in the depth direction of the paper surface, thereby constituting a line head.
- the printer head 19 is configured such that the element isolation regions 32 are formed in the silicon substrate 31 which is the semiconductor substrate, the transistors 33 and 34 which are the semiconductor elements are formed, and the insulating layer 35 is used.
- the first layer wiring pattern 37 is formed by insulation.
- an insulating protective layer 40 and a second-layer wiring pattern 44 are formed, and the heating element 39 is used as a transistor by the second-layer wiring pattern 44. They are connected, and a wiring pattern 44 such as a power supply and an earth line is formed.
- the printer head 19 is formed by sequentially forming an insulating protection layer 45, a metal protection layer 46, an ink liquid chamber 52, and a nozzle 23 (FIGS. 6, 7 to 11).
- the ink held in the head cartridge 18 into the ink liquid chamber 52 of the printer head 19 created in this way is guided by the ink flow path 21 (the The ink held in the ink liquid chamber 52 is heated by the driving of the heating element 39 to generate bubbles, and the pressure in the ink liquid chamber 52 rapidly increases due to the bubbles.
- the ink in the ink liquid chamber 52 is ejected as ink droplets from the nozzle 23 provided on the heating element 39 due to the increase in the pressure, and the rollers 15, 16, 17, etc. As a result, the ink droplets adhere to the paper 13 to be printed conveyed from the paper tray 14.
- a second-layer wiring pattern 44 connecting the transistor 34 relating to the driving of the heating element 39 to the heating element 39 has an insulating protection layer 40 interposed therebetween. It is arranged on the ink liquid chamber 52 side of the heating element 39, and the thickness of the metal wiring layer relating to the wiring pattern 44 is 400 [nm] or more, and is formed of 600 [nm].
- the wall surface of the wiring pattern 44 is formed in an uneven shape, and the wiring pattern 44 is formed. There is a concern that voids may be generated at the interface between the metal and the insulating protective layer 45.
- the wiring pattern 44 is formed by patterning using dry etching, and the wiring pattern 44 is formed through the contact portion 41 formed by the opening provided in the insulating protective layer 40. Connected to.
- the printer head 19 has After the insulating protective layer 40 of silicon nitride is deposited, an opening is formed in the insulating protective layer 40 to provide a contact portion 41 (FIG. 13 (A)). Aluminum or the like to which copper is added is deposited to form a wiring pattern material layer 43 (FIG. 13 (B)).
- an etching gas containing a chlorine atom component was used in the printer head 19.
- Excess wiring pattern material layer 43 in a portion excluding heating element 39 is etched by dry etching.
- the wiring pattern material layer 43 is also etched away at the portion on the heating element 39 at the same time, but the heating element 39 is used for forming the contact portion 41.
- the insulating protective layer 40 formed in advance above is used as a mask for protecting the heating element 39 from this dry etching, thereby preventing damage to the heating element 39 (FIG. 13 (C)). ).
- the heating element 39 is prevented from being damaged by the etching gas, and the wiring pattern 44 is formed with high accuracy.
- the void at the interface with the insulating protection layer 45 formed thereon is formed. Is effectively avoided.
- the wiring pattern 44 created in this way is connected to the heating element 39 via the contact part 41, and an insulating protective layer 45 and a metal protective layer 46 are sequentially formed. (Fig. 13 (D)).
- the thickness of the metal wiring layer according to the second wiring pattern 44 is set to 600 nm so that the metal wiring layer itself can be prevented from being weakened.
- the parasitic resistance due to the wiring layer and the like can be reduced by about 2/3 compared to the parasitic resistance described above with reference to FIG.
- the number of steps can be reduced as compared with the conventional case by simultaneously removing the wiring pattern material layer 43 on the heating element 39 by a dry etching step. As a result, the time required for manufacturing the printer head 19 can be reduced.
- overetching is performed by setting the etching time to about 1.2 times the etching time for the film thickness of the wiring pattern material layer 43.
- the insulating protective layers 40 and 45 for protecting the heating element 39 and the metal protective layer 46 are formed as a whole with a film thickness of 700 [nrn] or less. In the case of driving the heating element 39 with the driving power according to the rating, With this, the ink can be stably ejected from the nozzles 23.
- a wiring pattern is formed by pattern jungling using dry etching, and the wiring pattern is connected to the heating element via a contact portion formed by an opening provided in the insulating protection layer.
- the thickness of the metal wiring layer related to the wiring pattern can be sufficiently ensured, and the parasitic resistance due to the metal wiring layer can be reduced.
- the thickness of the metal wiring layer according to this wiring pattern is formed to be equal to or greater than 400 [nm], the metal wiring layer itself can be prevented from being weakened. The resistance value can be prevented from rising.
- an etching protection layer is formed on the heating element, and the contact section described in the first embodiment is formed on the etching protection layer. Note that, in this embodiment, the same configuration as that of the printer head according to the first embodiment is applied, except that the manufacturing process related to the etching protective layer is different, so that the same reference numerals are given, and duplicated. The explanation is omitted.
- the printer head 59 is provided with an etching protection layer having a thickness of 10 to 50 [nm]. 60 is deposited.
- the etching protection layer 60 is a protection layer for protecting the heating element 39 from the dry etching of the wiring pattern 44, and is formed of a material that is difficult to be etched by an etching gas used for patterning the wiring pattern 44. You. Specifically, in this case, titanium nitride oxide or tungsten is applied to the etching protection layer 60.
- an insulating protective layer 40 is deposited on the etching protective layer 60, and an opening is formed in the insulating protective layer 40 to form a contact portion 41.
- a wiring pattern material layer 43 is formed as shown in FIG. 14 (B), and further, as shown in FIG. 14 (C), dry etching using an etching gas containing a chlorine atom component.
- the formed wiring pattern material layer 43 is selectively etched, whereby the wiring pattern 44 is patterned.
- the etching protection layer 60 functions as a mask for the heating element 39, and damage to the heating element 39 due to dry etching can be prevented.
- an insulating protective layer 45 and a metal protective layer 46 are sequentially formed, followed by a nozzle 23, an ink liquid chamber 52, and the like.
- the ink flow paths 21 and the like for guiding the ink to the ink liquid chamber 52 are sequentially formed and created.
- the same effect as in the first embodiment can be obtained even when the etching protection layer is separately formed on the heating element as in this embodiment. That is, since the etching protection layer is a material that is difficult to etch by the etching gas used for pattern wiring patterning, the insulating protection layer used for forming the contact portion is removed by dry etching of the wiring pattern. Even if it does, the heating element can be reliably protected from dry etching.
- the insulating protective layer for forming the contact portion and the insulating protective layer formed after forming the wiring pattern may be formed of different materials. .
- the metal wiring layer is formed by aluminum to which silicon or copper is added has been described, but the present invention is not limited to this, and the metal wiring layer is formed by aluminum, copper, tungsten, or the like. It can be widely applied to a case where a wiring layer is formed.
- Liquid ejection head which is a droplet for forming a protective layer, etc., a microdispenser whose droplet is a reagent, etc., various measuring devices, various testing devices, and a chemical which protects a member from etching by a droplet. It can be widely applied to certain various pattern drawing apparatuses. Industrial applicability
- the present invention relates to a liquid ejection head, a liquid ejection device, and a method for manufacturing a liquid ejection head, and can be applied to, for example, a thermal inkjet printer.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP04772196A EP1661706A4 (en) | 2003-08-28 | 2004-08-19 | LIQUID SEPARATING HEAD, LIQUID SEPARATOR AND METHOD FOR PRODUCING A LIQUID JUMP HEAD |
US10/569,745 US20070153064A1 (en) | 2003-08-28 | 2004-08-19 | Liquid ejection head, liquid ejector and process for manufacturing liquid ejection head |
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JP2003303856A JP2005067164A (ja) | 2003-08-28 | 2003-08-28 | 液体吐出ヘッド、液体吐出装置及び液体吐出ヘッドの製造方法 |
JP2003-303856 | 2003-08-28 |
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WO2005021268A1 true WO2005021268A1 (ja) | 2005-03-10 |
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PCT/JP2004/012240 WO2005021268A1 (ja) | 2003-08-28 | 2004-08-19 | 液体吐出ヘッド、液体吐出装置及び液体吐出ヘッドの製造方法 |
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US (1) | US20070153064A1 (ja) |
EP (1) | EP1661706A4 (ja) |
JP (1) | JP2005067164A (ja) |
KR (1) | KR20060069477A (ja) |
CN (1) | CN100415521C (ja) |
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JP2008036947A (ja) | 2006-08-04 | 2008-02-21 | Ricoh Co Ltd | 液体吐出装置および液体吐出方法 |
US8967772B2 (en) * | 2009-10-22 | 2015-03-03 | Memjet Technology Ltd. | Inkjet printhead having low-loss contact for thermal actuators |
JP5765924B2 (ja) | 2010-12-09 | 2015-08-19 | キヤノン株式会社 | 液体吐出ヘッドの駆動方法、液体吐出ヘッド、及び液体吐出装置 |
EP3099497B1 (en) * | 2014-01-29 | 2020-01-22 | Hewlett-Packard Development Company, L.P. | Thermal ink jet printhead |
US10035346B2 (en) | 2015-01-27 | 2018-07-31 | Canon Kabushiki Kaisha | Element substrate and liquid ejection head |
JP6598658B2 (ja) * | 2015-01-27 | 2019-10-30 | キヤノン株式会社 | 液体吐出ヘッドの素子基板及び液体吐出ヘッド |
KR20170121243A (ko) * | 2015-02-25 | 2017-11-01 | 어플라이드 머티어리얼스, 인코포레이티드 | 금속 질화물의 선택적 제거를 위해 알킬 아민들을 사용하기 위한 방법들 및 장치 |
CN113211985B (zh) * | 2020-01-21 | 2022-10-14 | 国际联合科技股份有限公司 | 热气泡喷墨头装置 |
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JP2003237089A (ja) * | 2002-02-19 | 2003-08-26 | Sony Corp | プリンタの駆動条件の設定方法及びプリンタ |
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US4862197A (en) * | 1986-08-28 | 1989-08-29 | Hewlett-Packard Co. | Process for manufacturing thermal ink jet printhead and integrated circuit (IC) structures produced thereby |
JP3584752B2 (ja) * | 1998-10-06 | 2004-11-04 | 富士ゼロックス株式会社 | 液体噴射記録装置およびその製造方法 |
JP3647365B2 (ja) * | 1999-08-24 | 2005-05-11 | キヤノン株式会社 | 液体吐出ヘッド用基板ユニットおよびその製造方法ならびに液体吐出ヘッド,カートリッジおよび画像形成装置 |
US6139131A (en) * | 1999-08-30 | 2000-10-31 | Hewlett-Packard Company | High drop generator density printhead |
US6481831B1 (en) * | 2000-07-07 | 2002-11-19 | Hewlett-Packard Company | Fluid ejection device and method of fabricating |
JP4100943B2 (ja) * | 2001-03-26 | 2008-06-11 | キヤノン株式会社 | インクジェットプリントヘッドの駆動制御方法およびインクジェットプリント装置 |
JP3695530B2 (ja) * | 2001-12-03 | 2005-09-14 | ソニー株式会社 | プリンタヘッドの製造方法 |
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2003
- 2003-08-28 JP JP2003303856A patent/JP2005067164A/ja active Pending
-
2004
- 2004-08-19 US US10/569,745 patent/US20070153064A1/en not_active Abandoned
- 2004-08-19 KR KR1020067003928A patent/KR20060069477A/ko not_active Application Discontinuation
- 2004-08-19 EP EP04772196A patent/EP1661706A4/en not_active Withdrawn
- 2004-08-19 CN CNB2004800288437A patent/CN100415521C/zh not_active Expired - Fee Related
- 2004-08-19 WO PCT/JP2004/012240 patent/WO2005021268A1/ja active Application Filing
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JP2003237089A (ja) * | 2002-02-19 | 2003-08-26 | Sony Corp | プリンタの駆動条件の設定方法及びプリンタ |
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See also references of EP1661706A4 * |
Also Published As
Publication number | Publication date |
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EP1661706A1 (en) | 2006-05-31 |
JP2005067164A (ja) | 2005-03-17 |
CN100415521C (zh) | 2008-09-03 |
EP1661706A4 (en) | 2008-09-10 |
KR20060069477A (ko) | 2006-06-21 |
US20070153064A1 (en) | 2007-07-05 |
CN1863676A (zh) | 2006-11-15 |
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