WO2022085461A1 - 導電性パターン付構造体の製造方法 - Google Patents
導電性パターン付構造体の製造方法 Download PDFInfo
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- WO2022085461A1 WO2022085461A1 PCT/JP2021/037056 JP2021037056W WO2022085461A1 WO 2022085461 A1 WO2022085461 A1 WO 2022085461A1 JP 2021037056 W JP2021037056 W JP 2021037056W WO 2022085461 A1 WO2022085461 A1 WO 2022085461A1
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- WO
- WIPO (PCT)
- Prior art keywords
- conductive pattern
- plating
- copper
- dispersion
- pattern according
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 96
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 64
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000005751 Copper oxide Substances 0.000 claims abstract description 136
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 136
- 238000007747 plating Methods 0.000 claims abstract description 133
- 239000006185 dispersion Substances 0.000 claims abstract description 107
- 238000000576 coating method Methods 0.000 claims abstract description 62
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- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000007772 electroless plating Methods 0.000 claims abstract description 23
- 238000007639 printing Methods 0.000 claims abstract description 16
- 239000000243 solution Substances 0.000 claims description 98
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine group Chemical group NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 96
- -1 glycine compound Chemical class 0.000 claims description 87
- 239000010949 copper Substances 0.000 claims description 80
- 230000001603 reducing effect Effects 0.000 claims description 53
- 239000002270 dispersing agent Substances 0.000 claims description 39
- 239000003638 chemical reducing agent Substances 0.000 claims description 38
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Natural products NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 35
- 230000009467 reduction Effects 0.000 claims description 33
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- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 claims description 28
- 239000004471 Glycine Substances 0.000 claims description 25
- 239000002612 dispersion medium Substances 0.000 claims description 24
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- 239000000758 substrate Substances 0.000 claims description 19
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 18
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 claims description 18
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 15
- 229910001431 copper ion Inorganic materials 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 15
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- FSVCELGFZIQNCK-UHFFFAOYSA-N N,N-bis(2-hydroxyethyl)glycine Chemical compound OCCN(CCO)CC(O)=O FSVCELGFZIQNCK-UHFFFAOYSA-N 0.000 claims description 13
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- RJTANRZEWTUVMA-UHFFFAOYSA-N boron;n-methylmethanamine Chemical compound [B].CNC RJTANRZEWTUVMA-UHFFFAOYSA-N 0.000 claims description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 3
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
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- 239000000463 material Substances 0.000 abstract description 43
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- 150000001875 compounds Chemical class 0.000 description 17
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- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 14
- 229940112669 cuprous oxide Drugs 0.000 description 14
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 14
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 12
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- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 10
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- 239000004698 Polyethylene Substances 0.000 description 9
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000005119 centrifugation Methods 0.000 description 9
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 125000003118 aryl group Chemical group 0.000 description 8
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
- C23C18/40—Coating with copper using reducing agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1603—Process or apparatus coating on selected surface areas
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1603—Process or apparatus coating on selected surface areas
- C23C18/1607—Process or apparatus coating on selected surface areas by direct patterning
- C23C18/1608—Process or apparatus coating on selected surface areas by direct patterning from pretreatment step, i.e. selective pre-treatment
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1603—Process or apparatus coating on selected surface areas
- C23C18/1607—Process or apparatus coating on selected surface areas by direct patterning
- C23C18/1612—Process or apparatus coating on selected surface areas by direct patterning through irradiation means
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1635—Composition of the substrate
- C23C18/1639—Substrates other than metallic, e.g. inorganic or organic or non-conductive
- C23C18/1642—Substrates other than metallic, e.g. inorganic or organic or non-conductive semiconductor
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
- C23C18/1653—Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1655—Process features
- C23C18/166—Process features with two steps starting with addition of reducing agent followed by metal deposition
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1827—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment only one step pretreatment
- C23C18/1834—Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2026—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by radiant energy
- C23C18/2033—Heat
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2046—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment
- C23C18/2053—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment only one step pretreatment
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2046—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment
- C23C18/2073—Multistep pretreatment
- C23C18/208—Multistep pretreatment with use of metal first
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
- C23C18/40—Coating with copper using reducing agents
- C23C18/405—Formaldehyde
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/032—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing oxygen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/032—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing oxygen-containing compounds
- C23G5/036—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing oxygen-containing compounds having also nitrogen
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
Definitions
- the present invention relates to a method for manufacturing a structure with a conductive pattern.
- the circuit board has a structure in which conductive wiring is applied on the base material.
- the method for manufacturing a circuit board is generally as follows. First, a photoresist is applied on a base material to which a metal foil is bonded. Next, the photoresist is exposed and developed to obtain a negative shape of a desired circuit pattern. Next, the metal foil in the portion not covered with the photoresist is removed by chemical etching to form a pattern. This makes it possible to manufacture a high-performance circuit board.
- the conventional method has drawbacks such as a large number of steps, complicatedness, and the need for a photoresist material.
- a direct printing technique for directly printing a desired wiring pattern on a substrate with a dispersion in which metal or metal oxide particles are dispersed is attracting attention.
- This technique has extremely high productivity because the number of steps is small and it is not necessary to use a photoresist material.
- metal particles when metal particles are used, there may be a problem in stability due to oxidation of the metal particles themselves.
- a reduction firing step is required to obtain conductivity, so that the base material that can be used is limited, and a reducing gas is required, resulting in high cost. There is a problem with that.
- Patent Document 1 describes a method for forming a conductive film that forms a conductive film having a predetermined pattern on a substrate.
- a metal film containing metal particles is formed on the substrate by a droplet ejection method so as to have a pattern substantially equal to the pattern of the conductive film, and then the metal is subjected to at least one electroless plating.
- a conductive film is obtained by forming a plating film so as to cover the surface of the film.
- Patent Document 1 attempts to form a conductive film having excellent conductivity and reliability by combining pattern formation using metal particles and plating.
- the conductive film is formed.
- one aspect of the present invention is to provide a method for manufacturing a structure with a conductive pattern, which can form a structure with a conductive pattern having a simple manufacturing process and good interlayer adhesion. The purpose.
- the coating film includes a plating step of performing electroless plating using a plating solution.
- the reduction step is based on the following formula: (R 1 ) 2 NC-COOR 2 (In the formula, R 1 and R 2 are independently hydrogen or monovalent groups, and a plurality of R 1s in the formula may be the same or different from each other.)
- [5] The method for producing a structure with a conductive pattern according to the fourth aspect, wherein the glycine compound is N, N-di (2-hydroxyethyl) glycine.
- the copper ion source is at least one selected from the group consisting of CuSO 4 , CuCl 2 , CuCl, CuNO 3 , and Cu 3 (PO 4 ) 2 . Manufacturing method of attached structure.
- the reducing agent is at least one selected from the group consisting of formaldehyde, potassium tetrahydroate, dimethylamine borane, glyoxylic acid, and phosphinic acid.
- the base material has an adhesion layer and The method for producing a structure with a conductive pattern according to any one of the above aspects 1 to 17, wherein the dispersion is printed on the adhesion layer in the coating film forming step.
- Dispersion containing copper oxide-containing particles Plating solution containing EDTA (ethylenediaminetetraacetic acid) and the following formula: (R 1 ) 2 NC-COOR 2 (In the formula, R 1 and R 2 are independently hydrogen or monovalent groups, and a plurality of R 1s in the formula may be the same or different from each other.)
- a reducing solution containing a glycine compound represented by A conductive pattern structure manufacturing kit comprising at least two selected from the group consisting of.
- a method for manufacturing a structure with a conductive pattern which has a simple manufacturing process and can form a structure with a conductive pattern having good interlayer adhesion.
- One aspect of the present invention provides a method for manufacturing a structure with a conductive pattern.
- the method comprises a coating film forming step of printing a dispersion containing copper oxide-containing particles on a substrate to obtain a coating film, and a plating step of performing electroless plating on the coating film using a plating solution.
- the plating solution contains EDTA (ethylenediaminetetraacetic acid).
- the plating layer by forming the plating layer on the coating film formed by printing, the plating layer can be formed in a desired pattern without the need for firing. Therefore, for example, a conventional photoresist is used. It is possible to improve productivity compared with the method used. Further, in one embodiment, since a region having a relatively low porosity can be formed by plating, the resistance of the structure with a conductive pattern can be reduced. Although a specific method will be described later, according to the method of the present embodiment, the plating layer can be formed by the wet method, so that the conventional reducing gas and / or high temperature is not required. Hereinafter, suitable examples of each step will be described.
- a dispersion containing copper oxide-containing particles (also referred to as copper oxide ink in the present disclosure) is applied to a substrate to obtain a coating film.
- the dispersion contains copper oxide-containing particles.
- the copper oxide-containing particles are typically made of copper oxide, but may contain other components as long as the effects of the present invention are not impaired.
- the dispersion may further contain a dispersion medium, a dispersant, and / or a reducing agent.
- Copper oxide examples include cuprous oxide (Cu 2 O) and cupric oxide (Cu O), with cuprous oxide being preferred. Copper oxide is advantageous in that it is cheaper than precious metals such as silver because it is copper in terms of price, and that migration is unlikely to occur. As copper oxide, a commercially available product or a synthetic product can be used. You may use it.
- a method for synthesizing cuprous oxide the following method can be mentioned.
- Water and a copper acetylacetonato complex are added to the polyol solvent to dissolve the organic copper compound by heating, then water necessary for the reaction is added afterwards, and the temperature is further raised to reduce the temperature of the organic copper.
- a method of heating and reducing by heating with. (2) A method of heating an organic copper compound (for example, a copper-N-nitrosophenylhydroxyamine complex) at a high temperature of about 300 ° C. in an inert atmosphere in the presence of a protective agent such as hexadecylamine.
- a method of reducing a copper salt dissolved in an aqueous solution with hydrazine the method (3) is preferable because the operation is simple and cuprous oxide having a small average particle size can be obtained.
- Examples of the method for synthesizing cupric oxide include the following methods. (1) A method in which sodium hydroxide is added to an aqueous solution of cupric chloride or copper sulfate to generate copper hydroxide, and then heating is performed. (2) A method of thermally decomposing copper nitrate, copper sulfate, copper carbonate, copper hydroxide, etc. by heating them to a temperature of about 600 ° C. in the air. Among these, the method (1) is preferable because cupric oxide having a small particle size can be obtained.
- the product solution (as a supernatant) and copper oxide (as a precipitate) are separated by a known method such as centrifugation.
- the dispersion medium described below and optionally the dispersant described below are added to the obtained copper oxide, and the mixture is stirred and dispersed by a known method such as a homogenizer.
- copper oxide may be difficult to disperse and the dispersion may be insufficient.
- alcohols for example, butanol
- copper oxide can be easily dispersed are used as the dispersion medium to obtain copper oxide.
- Copper oxide can be satisfactorily dispersed in a desired dispersion medium by substituting with a desired dispersion medium and concentrating to a desired concentration.
- Examples of the method include concentration with a UF membrane, a method of repeating dilution and concentration with an appropriate dispersion medium, and the like. The copper oxide dispersion thus obtained is used for printing.
- copper oxide is in the form of fine particles.
- the average particle size of the copper oxide-containing particles is preferably 1 nm or more, 3 nm or more, or 5 nm or more, and preferably 100 nm or less, 50 nm or less, or 40 nm or less.
- the average particle size is the particle size at the time of dispersion in the dispersion, and is a value measured by the cumulant method (for example, FPAR-1000 manufactured by Otsuka Electronics Co., Ltd.). That is, the average particle size is not limited to the primary particle size, but may be the secondary particle size.
- the average particle size is 100 nm or less, it is preferable that a pattern can be formed at a low temperature, the versatility of the base material is widened, and a fine pattern tends to be easily formed on the base material. Further, when the average particle size is 1 nm or more, the dispersion stability of the copper oxide-containing particles in the dispersion is good, the long-term storage stability of the dispersion is good, and a uniform thin film can be produced. Is preferable.
- the particles in the dispersion are substantially only copper oxide-containing particles. In this case, the value of the average particle size measured for the dispersion can be regarded as the average particle size of the copper oxide-containing particles.
- the copper oxide-containing particles contain hydrazine.
- Hydrazine may form a hydrate (ie, hydrazine in the present disclosure is a concept that also includes hydrazine hydrate).
- the hydrazine may be a residue of hydrazine used as a reducing agent for copper oxide in the production of copper oxide-containing particles, or may be added separately during the production of the particles.
- the content of copper oxide in the copper oxide-containing particles is preferably 10% by mass or more, 30% by mass or more, 50% by mass or more, or 70% by mass or more, and preferably 100% by mass or less, or It is 99% by mass or less, or 98% by mass or less.
- the content of hydrazine in the copper oxide-containing particles is preferably 0.000000001% by mass or more, 0.0000001% by mass or more, or 0.0000005% by mass or more, and preferably 10% by mass or less, or 5 It is 1% by mass or less, or 1% by mass or less.
- the mass ratio of hydrazine to copper oxide in the copper oxide-containing particles is preferably 0.00001 or more, 0.0001 or more, or 0.0002 or more, and preferably 1 or less, 0.1 or less, or 0. It is 0.01 or less.
- the mass ratio of copper oxide in 100% by mass of the dispersion is preferably 5% by mass or more, 10% by mass or more, or 15% by mass or more, and preferably 60% by mass or less, or 55% by mass or less. Or it is 50% by mass or less.
- the dispersion medium can disperse the copper oxide-containing particles.
- the dispersion medium can dissolve the dispersant.
- the dispersion medium is suitable for a method for forming a conductive pattern, for example, a coating method (particularly printing). That is, it is preferable to select the dispersion medium according to the dispersibility and the workability of printing.
- the dispersion medium examples include propylene glycol monomethyl ether acetate, 3-methoxy-3-methyl-butyl acetate, ethoxyethyl propionate, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, and propylene glycol.
- the dispersions are 1-hexanol, 1-heptanol, and 1-octanol because they dry slowly, ink is less likely to aggregate during continuous printing, and the intermittent stability of the inkjet is good, and there are few abnormal flights. It is particularly preferred to include one or more dispersion media selected from the group consisting of.
- the boiling point of the dispersion medium is preferably high in terms of improving print continuity, for example, preferably 50 ° C. or higher, more preferably 100 ° C. or higher, still more preferably 150 ° C. or higher.
- the boiling point is preferably 400 ° C. or lower, more preferably 300 ° C. or lower, still more preferably 250 ° C. or lower, from the viewpoint of obtaining a good function as a dispersion medium.
- the content of the dispersion medium is preferably 30% by mass or more, 40% by mass or more, or 50% by mass or more, and preferably 95% by mass or less, or 90% by mass or less in the whole dispersion.
- the dispersant a compound capable of dispersing copper oxide in a dispersion medium can be used.
- the number average molecular weight of the dispersant is preferably 300 or more, 350 or more, or 400 or more, and preferably 300,000 or less, 200,000 or less, or 150,000 or less.
- the number average molecular weight of the present disclosure is a value obtained in terms of standard polystyrene using gel permeation chromatography. When the number average molecular weight is 300 or more, the insulating property is excellent and the dispersion tends to contribute greatly to the dispersion stability, and when it is 300,000 or less, it is preferable in terms of handleability.
- the dispersant preferably has a group having an affinity for copper oxide.
- the dispersant is preferably a phosphorus-containing organic substance or a phosphorus-containing organic substance, or a phosphoric acid ester-containing or a phosphoric acid ester, or a polymer phosphoric acid ester-containing or a polymer phosphorus. It is an acid ester.
- the phosphoric acid ester of the polymer for example, the following formula (1):
- l is an integer of 1 to 10000
- m is an integer of 1 to 10000
- n is an integer of 1 to 10000.
- the structure represented by is preferable because it has excellent adsorptivity to copper oxide, particularly cuprous oxide, and adhesion to a substrate.
- l is more preferably 1 to 5000, still more preferably 1 to 3000.
- m is more preferably 1 to 5000, still more preferably 1 to 3000.
- n is more preferably 1 to 5000, still more preferably 1 to 3000.
- the decomposition temperature of the phosphorus-containing organic substance is preferably 600 ° C. or lower, more preferably 400 ° C. or lower, and even more preferably 200 ° C. or lower.
- the decomposition temperature may be 50 ° C. or higher, 80 ° C. or higher, or 100 ° C. or higher from the viewpoint of facilitating the selection of a dispersant having an excellent effect of improving the dispersion stability of the dispersion.
- the boiling point of the phosphorus-containing organic substance is preferably 300 ° C. or lower, more preferably 200 ° C. or lower, and even more preferably 150 ° C. or lower.
- the boiling point may be 30 ° C. or higher, 50 ° C. or higher, or 80 ° C. or higher.
- the decomposition temperature is a value measured by a thermogravimetric differential thermal analysis method.
- the phosphorus-containing organic substance is preferable in that the coating film and the plating layer are less likely to peel off when plating is performed.
- a known dispersant may be used.
- Polymers with basic groups such as salts of long-chain polyaminoamides with polar acid esters, unsaturated polycarboxylic acid polyaminoamides, polycarboxylates of polyaminoamides, salts of long-chain polyaminoamides with acid polymers, etc.
- examples thereof include alkylammonium salts, amine salts and amidoamine salts of polymers such as acrylic (co) polymers, modified polyester acids, polyether ester acids, polyether carboxylic acids and polycarboxylic acids.
- a commercially available one can also be used.
- Examples of the above-mentioned commercial products include DISPERBYK (registered trademark) -101, DISPERBYK-102, DISPERBYK-110, DISPERBYK-111, DISPERBYK-112, DISPERBYK-118, DISPERBYK-130, DISPERBYK-140, DISPERBYK-142, DISPER.
- DISPERBYK registered trademark
- the acid value (mgKOH / g) of the dispersant is preferably 20 or more, or 30 or more, and preferably 130 or less, or 100 or less.
- the acid value in the above range is effective.
- "DISPERBYK-102" (acid value 101), "DISPERBYK-140” (acid value 73), “DISPERBYK-142” (acid value 46), “DISPERBYK-145" (acid value 76) manufactured by Big Chemie. ), "DISPERBYK-118" (acid value 36), “DISPERBYK-180” (acid value 94) and the like are preferably mentioned.
- the difference between the amine value (mgKOH / g) of the dispersant and the acid value ([amine value]-[acid value]) is preferably -50 or more and 0 or less.
- the amine value indicates the total amount of the free base and the free base-derived site
- the acid value indicates the total amount of the free fatty acid and the free fatty acid-derived site.
- the amine value and acid value are measured by a method according to JIS K7700 or ASTM D2074, respectively.
- the value of [amine value]-[acid value] is -50 or more and 0 or less, the dispersion stability of the dispersion is good, which is preferable.
- the value of [amine value]-[acid value] is more preferably ⁇ 40 or more and 0 or less, and further preferably ⁇ 20 or more and 0 or less.
- the content of the dispersant should be adjusted in proportion to the amount of copper oxide and in consideration of the required dispersion stability.
- the mass ratio of the dispersant to the copper oxide in the dispersion is preferably 0.0050 or more, 0.050 or more, or 0.10 or more, and preferably 0. It is 30 or less, 0.25 or less, or 0.23 or less.
- the amount of the dispersant affects the dispersion stability of the dispersion, and when the amount is small, copper oxide tends to aggregate, and when the amount is large, the dispersion stability of the dispersion tends to be improved.
- the amount of the dispersant in 100% by mass of the dispersion is preferably 0.5% by mass or more, 0.8% by mass or more, or 1.0% by mass or more, preferably 35% by mass. % Or less, or 30% by mass or less, or 25% by mass or less.
- the dispersion comprises a reducing agent.
- Reducing agents include hydrazine, sodium, sodium borate hydride, potassium iodide, sulfite, sodium thiosulfate, formic acid, oxalic acid, ascorbic acid, iron (II) sulfide, tin (II) chloride, diisobutylaluminum hydride. , Carbon and the like, preferably hydrazine.
- Hydrazine may be in the form of hydrazine hydrate (ie, hydrazine in the present disclosure is a concept that also includes hydrazine hydrate).
- hydrazine When the dispersion contains hydrazine, hydrazine contributes to the reduction of copper oxide, particularly cuprous oxide, in the plating step, and a reduced copper layer (as a copper-containing film) having lower resistance can be formed. Hydrazine is also advantageous in maintaining the dispersion stability of the dispersion, and is also preferable from the viewpoint of improving productivity during plating. Hydrazine in the dispersion may be present as a component in the copper oxide-containing particles and / or separately from the copper oxide-containing particles.
- the content of the reducing agent in the dispersion should be adjusted in proportion to the amount of copper oxide in consideration of the required reducing property.
- the mass ratio of the reducing agent to the copper oxide in the dispersion is preferably 0.0001 or more, preferably 0.1 or less, or 0.05 or less. Or it is 0.03 or less.
- the mass ratio of the reducing agent is 0.0001 or more, the dispersion stability of the dispersion is good and the resistance of the reduced copper layer is low, which is preferable.
- the mass ratio is 0.1 or less, the dispersion is stable for a long period of time. Good sex.
- Two or more types of reducing agents may be used in combination.
- the total content of hydrazine and the reducing agent other than hydrazine in the dispersion is proportional to the amount of copper oxide and adjusted in consideration of the required reducing property. It is better to do it.
- the total mass ratio of hydrazine to the reducing agent other than hydrazine (total mass of reducing agent / mass of copper oxide) with respect to copper oxide in the dispersion is preferably 0.0001 or more, preferably 0.1. Below, or 0.05 or less, or 0.03 or less.
- the dispersion stability of the dispersion is good and the resistance of the reduced copper layer is low, and when it is 0.1 or less, the dispersion of the dispersion is preferable. Good long-term stability.
- the dispersion For the dispersion, mix the ingredients and use a mixer method, ultrasonic method, 3-roll method, 2-roll method, attritor, homogenizer, Banbury mixer, paint shaker, kneader, ball mill, sand mill, revolution mixer, etc. It can be manufactured by dispersion processing.
- the viscosity of the dispersion can be designed according to the desired coating mode.
- the viscosity of the dispersion for screen printing is preferably 50 mPa ⁇ s or more, more preferably 100 mPa ⁇ s or more, further preferably 200 mPa ⁇ s or more, preferably 50,000 mPa ⁇ s or less, and more preferably 10,000 mPa ⁇ s or less. , More preferably 5000 mPa ⁇ s or less.
- the viscosity of the dispersion is a value measured at 23 ° C. using a cone plate type rotational viscometer.
- FIG. 1 is a schematic cross-sectional view showing the relationship between copper oxide and a phosphate ester salt in a dispersion (copper oxide ink) that can be used in one aspect of the present invention.
- the copper oxide ink 100 contains a copper oxide 12 and a phosphoric acid ester salt 13 (an example of a phosphoric acid ester as a dispersant)
- the circumference of the copper oxide 12 is surrounded.
- the phosphate ester salt 13 surrounds the phosphorus 13a on the inside and the ester salt 13b on the outside.
- the phosphoric acid ester salt 13 exhibits electrical insulation, the electrical conduction between the copper oxides 12 adjacent to each other is hindered by the phosphoric acid ester salt 13. Further, the phosphoric acid ester salt 13 suppresses the aggregation of the copper oxide ink 100 due to the steric hindrance effect. Therefore, although the copper oxide 12 is a semiconductor (that is, has a certain degree of conductivity), it is covered with the phosphoric acid ester salt 13 exhibiting electrical insulation, so that the copper oxide ink 100 exhibits electrical insulation.
- a conductive pattern region having excellent electrical conductivity is formed.
- the phosphorus element remains in the conductive pattern region.
- the phosphorus element exists as at least one of elemental phosphorus element, phosphorus oxide and phosphorus-containing organic substance.
- residual phosphorus element is usually segregated and present in the conductive pattern region, there is no possibility that the resistance in the conductive pattern region will increase.
- the base material used in the present embodiment has a surface on which a coating film is formed, and examples thereof include a substrate material for a circuit board sheet for forming a wiring pattern.
- the base material may be composed of an inorganic material, an organic material, or a combination thereof, and may have an adhesion layer in one embodiment.
- the inorganic material examples include soda lime glass, non-alkali glass, borosilicate glass, glass such as quartz glass, and ceramic materials such as alumina.
- organic materials include paper materials such as cellulose and polymer materials such as resin films.
- polymer material include polyimide (PI), polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), etc.), polyethersulfone (PES), polycarbonate (PC), polyvinyl alcohol ( PVA), polyvinyl butyral (PVB), polyacetal (POM), polyallylate (PAR), polyamide (PA) (PA6, PA66, etc.), polyamideimide (PAI), polyetherimide (PEI), polyphenylene ether (PPE), Modified polyphenylene ether (m-PPE), polyphenylene sulfide (PPS), polyetherketone (PEK), polyphthalamide (PPA), polyethernitrile (PENT), polybenzimidazole (PBI), polycarbodiimide, silicone polymer (poly).
- PI polyimide
- PET polyethylene terephthalate
- Siloxane polymethacrylamide, nitrile rubber, acrylic rubber, polyethylenetetrafluoride, epoxy resin, phenol resin, melamine resin, urea resin, polymethylmethacrylate resin (PMMA), polybutene, polypentene, ethylene-propylene copolymer, Ethylene-butene-diene copolymer, polybutadiene, polyisoprene, ethylene-propylene-diene copolymer, butyl rubber, polymethylpentene (PMP), polystyrene (PS), styrene-butadiene copolymer, polyethylene (PE), poly Vinyl chloride (PVC), polyvinylidene fluoride (PVDF), polyetheretherketone (PEEK), phenol novolac, benzocyclobutene, polyvinylphenol, polychloropyrene, polyoxymethylene, polysulfone (PSF), polyphenylsulfone resin (PPSU) , Cy
- the base material may be, for example, a glass composite base material, a composite base material such as a glass epoxy base material, a Teflon (registered trademark) base material, an alumina base material, a low-temperature low-humidity co-fired ceramics (LTCC), a silicon wafer, or the like. ..
- the thickness of the base material is preferably 1 ⁇ m or more, or 25 ⁇ m or more, and preferably 10 mm or less, or 250 ⁇ m or less.
- the manufactured electronic device can be made lighter, space-saving, and flexible, which is preferable.
- the coating film As a method for applying the dispersion, inkjet printing, screen printing, concave plate direct printing, concave offset printing, flexographic printing, offset printing and the like can be used.
- the coating can be carried out by using a method such as die coating, spin coating, slit coating, bar coating, knife coating, spray coating, dip coating and the like.
- the coating method is preferably inkjet printing.
- the inkjet method does not require a printing plate and does not have extra components adhering between the wirings, so it is excellent in migration.
- the layer thickness of the coating film after drying is preferably 1 nm or more, 10 nm or more, or 100 nm or more, and preferably 10,000 nm or less, 8000 nm or less, or 7,000 nm or less in that a uniform conductive pattern can be formed. Is.
- the base material may have an adhesion layer (also referred to as an ink receiving layer), and a coating film may be formed by printing the dispersion on the adhesion layer.
- the compound forming the adhesion layer (also referred to as “coating compound” in the present disclosure) preferably has an —OH group and / or an Ar—O structure and / or an MO structure.
- Ar represents an aromatic structure
- M represents a metal atom.
- the adhesion layer When the adhesion layer is present, a layer containing copper oxide-containing particles can be formed on the substrate with good adhesion, and heat is not easily transferred to the substrate body, so that a resin having low heat resistance, for example, polyethylene terephthalate (PET) ) Since the resin can also be used as the main body of the base material, it is advantageous in terms of versatility.
- a resin having low heat resistance for example, polyethylene terephthalate (PET)
- the -OH group is particularly an aromatic hydroxyl group (that is, a -OH group that constitutes an -Ar-OH group) or a hydroxyl group bonded to a metal atom (that is, a -OH group that constitutes an -M-OH group). Is preferable.
- the -OH groups constituting the -Ar-OH group and the -M-OH group have high activity, and the adhesion between the adhesion layer and the main body of the base material and / or the adhesion between the layer containing copper oxide-containing particles and the adhesion layer. It tends to be excellent in sex.
- the aromatic structure (Ar) in the -Ar-OH group includes, for example, aromatic hydrocarbons such as benzene, naphthalene, anthracene, tetracene, pentacene, phenanthrene, pyrene, perylene, and triphenylene; and thiophene, thiazole, pyrrole, and the like.
- aromatic hydrocarbons such as benzene, naphthalene, anthracene, tetracene, pentacene, phenanthrene, pyrene, perylene, and triphenylene
- thiophene, thiazole, pyrrole and the like.
- Bivalent groups derived from aromatic compounds such as furan, pyridine, pyrazole, imidazole, pyridazine, pyrimidine, and heteroaromatic compounds such as pyrazine; (ie, these compounds from which two hydrogen atoms have been removed) are
- the number of electrons contained in the ⁇ -electron system of the aromatic structure is preferably 22 or less, more preferably 14 or less, and further preferably 10 or less.
- the crystallinity does not become too high, and it becomes easy to obtain a flexible and highly smooth adhesion layer.
- a part of hydrogen bonded to the aromatic ring may be substituted with a functional group.
- Examples of the functional group include a halo group, an alkyl group (for example, a methyl group, an isopropyl group, a tertiary butyl group, etc.), an aryl group (for example, a phenyl group, a naphthyl group, etc.), a heteroaromatic group (thienyl group, etc.), and a haloaryl.
- an alkyl group for example, a methyl group, an isopropyl group, a tertiary butyl group, etc.
- an aryl group for example, a phenyl group, a naphthyl group, etc.
- a heteroaromatic group thienyl group, etc.
- Group eg pentafluorophenyl group, 3-fluorophenyl group, 3,4,5-trifluorophenyl group, etc.
- alkenyl group alkynyl group, amide group, acyl group, alkoxy group (eg, methoxy group, etc.), aryloxy
- examples thereof include a group (for example, a phenoxy group, a naphthoxy group, etc.), a haloalkyl group (for example, a perfluoroalkyl group, etc.), a thiocyano group, a hydroxyl group, and the like.
- -Ar-OH group a hydroxyphenyl group (-Ph-OH) is particularly preferable.
- the metal atoms (M) in the -M-OH group include silicon, silver, copper, aluminum, zirconium, titanium, hafnium, tantalum, tin, calcium, cerium, chromium, cobalt, holmium, lanthanum, magnesium, manganese, molybdenum. Examples thereof include nickel, antimony, samarium, terbium, tungsten, yttrium, zinc, indium and the like.
- an -Si-OH group or an -Zr-OH group is preferable, and when the adhesion layer requires conductivity, an -Ti-OH group or an -Zn-OH group is preferable.
- the aromatic structure (Ar) in the Ar—O structure may be a structure in which one or more hydrogen atoms are removed from the same aromatic compound as the aromatic compound exemplified for the —Ar—OH group.
- the Ph—O structure is preferable as the Ar—O structure.
- the metal atom in the MO structure the same metal atom as that exemplified for the —M—OH group can be used.
- the MO structure a Si—O structure, a Ti—O structure, a Zn—O structure, and a Zr—O structure are preferable.
- Examples of the coating compound having a Si—O structure include a silica-based compound (for example, silicon dioxide (SiO 2 )) and a silicone-based compound (for example, polysiloxane, for example, alkylpolysiloxane, for example, dimethylpolysiloxane).
- a silica-based compound for example, silicon dioxide (SiO 2 )
- a silicone-based compound for example, polysiloxane, for example, alkylpolysiloxane, for example, dimethylpolysiloxane.
- the coating compound examples include polyimide, polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.), polyethersulfone (PES), polycarbonate (PC), polyvinyl alcohol (PVA), polyvinyl butyral (PVB).
- Urea resin polymethyl methacrylate resin (PMMA), polybutene, polypentene, ethylene-propylene copolymer, ethylene-butene-diene copolymer, polybutadiene, polyisoprene, polychloroprene, ethylene-propylene-diene copolymer, Nitrile rubber, chlorosulfonated polyethylene, acrylic rubber, epichlorohydrin rubber, urethane rubber, butyl rubber, fluororubber, polymethylpentene (PMP), polystyrene (PS), styrene-butadiene copolymer, polyethylene (PE), polyvinyl chloride (PE) PVC), polyvinylidene fluoride (PVDF), polyetheretherketone (PEEK), phenol novolac resin, benzocyclobutene, polyvinylphenol, polychloropyrene, polyoxymethylene, polysulfone (PSF), etc., with the above-
- the upper limit of the thickness of the adhesion layer is not particularly limited, but is preferably 20 ⁇ m or less, more preferably 5 ⁇ m or less, still more preferably 1 ⁇ m or less, and the lower limit is preferably 0.01 ⁇ m or more, more preferably 0.05 ⁇ m or more. More preferably, it is 0.2 ⁇ m or more.
- One aspect of the method of the present disclosure may further include a drying step of drying the coating film between the coating film forming step and the plating step.
- the drying step is a step for vaporizing the dispersion medium.
- the dispersion medium may be vaporized at room temperature, or may be vaporized by a method such as oven or vacuum drying. Considering the heat resistance of the base material, it is preferable to dry at a temperature of 150 ° C. or lower, and it is more preferable to dry at a temperature of 100 ° C. or lower. Further, nitrogen or hydrogen mixed nitrogen (for example, a mixed gas containing about 3% by volume of hydrogen in a total of 100% by volume of hydrogen and nitrogen) may be introduced at the time of drying.
- nitrogen or hydrogen mixed nitrogen for example, a mixed gas containing about 3% by volume of hydrogen in a total of 100% by volume of hydrogen and nitrogen
- One aspect of the method of the present disclosure may include a reduction step prior to the plating step.
- a copper-containing film is obtained by reducing a copper oxide-containing film which is a coating film that has undergone or has not undergone a drying step.
- the copper oxide-containing particles in the copper oxide-containing film are reduced to generate copper, and the copper-containing film (reduced copper layer) can be formed by fusing and integrating the copper itself.
- this step may be omitted.
- a reduction method a method of reducing at a temperature of 100 ° C. or higher and 500 ° C.
- the reduction step is a step of immersing the copper oxide-containing film in the reducing solution, that is, a wet reducing step.
- the reducing solution contains a reducing agent.
- the reducing agent may be inorganic or organic.
- examples of the inorganic reducing agent include sodium borohydride, sulfur dioxide, sodium nitrite, metallic aluminum, cerium chloride, sodium thiosulfate and the like, and examples of the organic reducing agent include hydrazine, formaldehyde, methanol, citric acid and the like.
- Glycin compound represented by in the present disclosure, also simply referred to as a glycine compound
- L-ascorbic acid and its salt L-ascorbic acid and its salt
- thioglycolic acid hydroxylamine hydrochloride
- hydroquinone hydrosulfite
- erythorbic acid erythorbic acid salt
- thiourea Tin-based reducing agent, iron-based reducing agent, zinc-based reducing agent and the like.
- the glycine compound represented by the above formula (2) is glycine or a derivative thereof.
- the glycine derivative include N- [N- (benzyloxycarbonyl) glycine] -L-proline, N-carbobenzoxyglycine 4-nitrophenyl, L- (2-chlorophenyl) glycine chloride, and BOC-N ⁇ -methyl.
- R 1 is preferably a monovalent group having 1 to 4 carbon atoms having one or more hydroxy groups.
- R 2 is preferably hydrogen or It is a hydrocarbon group having 1 to 3 carbon atoms.
- a compound having a structure having two or more hydroxy groups in the molecule is suitable.
- a glycine derivative having two or more hydroxyl groups is advantageous in that the speed of the plating step, which is a subsequent step, can be increased and the film is less likely to peel off during the step.
- the compound having a structure having two or more hydroxy groups in the molecule are N, N-di (2-hydroxyethyl) glycine, N- [tris (hydroxymethyl) methyl] glycine, and the like.
- the concentration of the reducing agent in the reducing solution is, for example, 1.0 g / L or more, or 3.0 g / L or more, or from the viewpoint that the reduction rate is good and stable reduction can be performed. It may be 5.0 g / L or more, or 10.0 g / L or more, for example, 600 g / L or less, or 570 g / L or less, or 550 g / L or less, or 520 g / L or less, or 500 g / L or less. It may be there.
- the concentration of the reducing agent in the reducing solution is, for example, 0.1% by mass or more, 0.3% by mass or more, or 0.5% by mass or more, or 1. It may be 0% by mass or more, and may be, for example, 60% by mass or less, 57% by mass or less, 55% by mass or less, 52% by mass or less, or 50% by mass or less.
- the reducing solution contains the glycine compound represented by the above formula (2).
- the concentration of the glycine compound in the reducing solution is preferably 1% by mass or more, 8% by mass or more, or 16% by mass or more, and preferably 50% by mass or less, or 32% by mass or less.
- the reducing solution contains a solvent.
- the solvent system may be an aqueous system or an organic solvent system.
- the solvent include water, ethanol, 1-butanol, 2-propanol, toluene, hexane, benzene, chloroform, methylene chloride, acetic acid, ethyl acetate, tetrahydrofuran, acetone, acetonitrile, N, N-dimethylformamide, dimethyl sulfoxide and the like.
- water, ethanol, 1-butanol, and 2-propanol are preferable from the viewpoint of reuse.
- Water is particularly preferable as the solvent in the reducing liquid, and a combination of the glycine compound and water is particularly preferable from the viewpoint of cost and productivity.
- the reducing solution is particularly preferably an aqueous solution in which the concentration of the glycine compound is 1% by mass or more and 50% by mass.
- the reducing solution contains N, N-di (2-hydroxyethyl) glycine and / or citric acid from the viewpoint of productivity, that is, from the viewpoint of rapid reduction.
- N, N-di (2-hydroxyethyl) glycine it is preferable in that copper becomes a divalent ion in the reducing solution to form a complex with glycine, thereby promoting the reduction from copper oxide to copper.
- the reducing solution preferably contains copper ions and / or copper oxide in an predetermined amount or more. This makes it possible to prevent the coating film from falling off during wet reduction.
- the copper ion concentration, the copper oxide concentration, or the total concentration of copper ions and copper oxide in the reducing solution is preferably 1% by mass or more, or 5% by mass or more, and preferably 99% by mass or less. Or 90% by mass or less.
- one or more selected from the group consisting of a dispersion containing copper acetate, copper chloride, copper oxide, metallic copper, and copper oxide-containing particles of the present disclosure is added to a solvent to prepare a reducing solution.
- copper ions and / or copper oxide may be contained in the reducing solution.
- the reducing solution may contain copper oxide by diffusing copper oxide from the coating film into the solvent.
- the temperature of the wet reduction step is preferably 20 ° C. or higher, more preferably 30 ° C. or higher, and even more preferably 40 ° C. or higher from the viewpoint of rapid reduction. Further, from the viewpoint of obtaining a uniform copper-containing film, 100 ° C. or lower is preferable, and 90 ° C. or lower is more preferable.
- the wet reduction process and the electroless plating in the plating process can be performed at the same time. From the viewpoint of improving productivity, it is preferable to perform the wet reduction step and the plating step at the same time. Specifically, since the plating solution described later also contains a reducing agent, the wet reduction step and the plating step can be performed at the same time. In this case, the solvent amount may be adjusted so that the concentration of the reducing agent and the concentration of the plating substance (copper concentration in one embodiment) in the plating solution are within the ranges exemplified for the reducing solution and the plating solution in the present disclosure. preferable.
- ⁇ Washing process> In the case of wet reduction, after the wet reduction, the unreduced portion and the reduced liquid may be removed by using an appropriate cleaning liquid. This leaves a clean reducing region on the substrate. On the other hand, it is not necessary to perform the cleaning step. In either case, a base material to which conductivity is imparted by the reduction region as the conductive pattern (hereinafter, also referred to as a conductive base material) can be obtained. However, when the copper oxide-containing film is plated as it is, this step may be omitted.
- a liquid that disperses or dissolves copper oxide can be used as the cleaning liquid for cleaning.
- Specific examples include water, propylene glycol monomethyl ether acetate, 3-methoxy-3-methyl-butyl acetate, ethoxyethyl propionate, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, and propylene glycol tasher.
- the above solvent is suitable because copper oxide can be washed off well, especially when the coating film contains a dispersant.
- a dispersant water, ethanol, butanol, i-propanol, and acetone are particularly preferable.
- the above cleaning liquid may contain a dispersant in addition to the solvent.
- the dispersant those described above can be used, and more preferably a phosphorus-containing organic substance.
- One aspect of the method of the present disclosure may include a step of degreasing the copper oxide-containing film or the copper-containing film before the plating step.
- productivity can be improved by directly degreasing copper oxide without reducing it.
- copper oxide may be reduced (for example, in the reduction step described above) and then degreased.
- Examples of the degreasing method include a UV method and a wet degreasing method. The degreasing step speeds up the subsequent growth rate of plating and improves productivity.
- the porosity of the conductive layer after plating (that is, the plated layer and the reduced copper layer in the embodiment in which the copper oxide in the copper oxide-containing film is reduced) is reduced, that is, the final conductivity. Contributes to the porosity of the sex layer.
- degreasing may be performed together with electroless plating, and in this case, the degreasing step may be omitted.
- the degreasing step is preferably performed by immersing a copper oxide-containing film or a copper-containing film in a degreasing solution containing a compound containing an amino group.
- the amino group-containing compound include amino acids such as alanine, arginine, asparagine, cysteine, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, treonine, tryptophan, tyrosine, and valine, and methylamine.
- Alkylamines such as dimethylamine, ethylamine, trimethylamine, diethylamine, triethylamine, propylamine, isopropylamine, diisopropylamine, 2-aminoethanol, diethanolamine, triethanolamine, N-methylethanolamine, N, N-dimethylethanolamine
- Alkanolamines such as ethylenediamine, diethylenetriamine, tetraethylenepentamine, tris (hydroxymethyl) aminomethane, m-xylylene diamine, p-xylylene diamine, polyamines such as 1,3-bis (aminomethyl) cyclohexane, etc.
- Examples thereof include aminosulfonic acids such as taurine, aminothiols such as 2-aminoethanethiol, and nitrogen-containing heterocyclic compounds such as 3-picorylamine and 3-pyridinemethanol.
- 2-Aminoethanol is particularly preferred from the viewpoint of contributing to the growth rate of plating.
- the degreasing solution may be a commercially available product, specifically, ALC-009 (including 2-aminoethanol as a compound having an amino group) available from Uemura Kogyo Co., Ltd., and Atotech Japan Co., Ltd. Included is Cleaner Securigant 902 (containing 2-aminoethanol as a compound having an amino group) and the like.
- the concentration of the compound containing an amino group in the degreasing solution is preferably 5 mmol / L or more, more preferably 10 mmol / L or more, and more preferably 20 mmol / L or more from the viewpoint of removing the inhibitor of the plating reaction. Further, from the viewpoint of accelerating the plating reaction, 100 mmol / L or less is preferable, 90 mmol / L or less is more preferable, and 80 mmol / L or less is more preferable.
- the immersion time of the copper oxide-containing film or the copper-containing film in the degreasing solution is preferably 1 minute or longer, more preferably 2 minutes or longer, from the viewpoint of contributing to the growth rate of plating. Further, from the viewpoint of reducing damage to the substrate, 15 minutes or less is preferable, and 10 minutes or less is more preferable. Immersion under stirring is preferable from the viewpoint of uniform degreasing.
- the immersion temperature is preferably 15 ° C. or higher, more preferably 30 ° C. or higher, and even more preferably 40 ° C. or higher in order to enhance the effect of promoting the growth rate of plating. Further, from the viewpoint of reducing damage to the base material, 70 ° C. or lower is preferable, and 60 ° C. or lower is more preferable.
- a coating film that has undergone or has not undergone a drying step, a reducing step and / or a degreasing step (in one embodiment, a coating film that has undergone or has not undergone a wet reducing step and / or a degreasing step after the drying step. ),
- the copper oxide-containing film or the copper-containing film is electroplated.
- productivity can be improved by directly plating the copper oxide-containing film without reducing it.
- the electroless plating may reduce a part or all of the copper oxide in the copper oxide-containing film, or may not reduce the copper oxide.
- the conductivity can be improved by electroless plating the copper-containing film obtained by reducing (for example, wet reducing) the copper oxide-containing film.
- electroless plating a conductive pattern composed of a layer containing copper oxide and / or copper which is a reduced product thereof and a plating layer can be formed. This makes it possible to manufacture a structure with a conductive pattern.
- Electroless plating is advantageous in terms of wide applicability to patterns.
- a general electroless plating method may be applied. For example, electroless plating may be performed together with the degreasing step or the cleaning step.
- the plating solution contains EDTA (ethylenediaminetetraacetic acid). Since EDTA functions as a complexing agent and forms a highly stable complex with copper ions, it suppresses side reactions in the plating bath, stabilizes the bath, and promotes plating precipitation uniformly, thereby copper oxide.
- EDTA ethylenediaminetetraacetic acid
- the use of the plating solution containing EDTA contributes to the production of a structure with a conductive pattern having excellent interlayer adhesion. Further, since EDTA is stable even in a high-temperature liquid, it also contributes to increasing the plating speed when the plating liquid containing EDTA is used under heating (for example, 30 ° C. or higher). Further, it is particularly preferable to perform plating with a plating solution containing EDTA (ethylenediaminetetraacetic acid) after wet reduction because the growth of copper plating is promoted and the productivity is improved.
- a plating solution containing EDTA ethylenediaminetetraacetic acid
- the amount of EDTA in the plating solution is preferably 7 g / L or more, 10 g / L or more, or 15 g / L or more from the viewpoint of obtaining the advantages of EDTA well, and reduces impurities in the plating precipitate. From the viewpoint of lowering the electrical resistance, it is preferably 50 g / L or less, 45 g / L or less, or 40 g / L or less.
- the plating solution contains a copper ion source and a reducing agent.
- the copper ion source may exist as an ion in the liquid.
- the copper oxide-containing film or the copper-containing film may be immersed in the plating solution while performing air bubbling. Copper ions in the plating solution are reduced by electrolytic plating, and copper is deposited on the surface of the copper oxide-containing film or the copper-containing film to form a plated copper layer. In electroplating, some or all of the copper oxide in the copper oxide-containing film may or may not be reduced by the plating solution, and thus on the copper oxide and / or copper-containing layer. A plated copper layer is formed on the surface.
- the copper concentration of the plating solution is preferably 1.5 g / L or more, 1.8 g / L or more, or 2.0 g / L or more, and the uniformity of the plating film is high. From the viewpoint, it is preferably 5.0 g / L or less, 4.0 g / L or less, 3.5 g / L or less, or 3.0 g / L or less. In particular, when wet reduction and plating are combined, the copper concentration of the plating solution is preferably 1.8 g / L or more and 3.5 g / L or less.
- Examples of the copper ion source contained in the plating solution include CuSO 4 , CuCl 2 , CuCl, CuNO 3 , Cu 3 (PO 4 ) 2 , etc., and CuCl 2 and CuSO 4 from the viewpoint of forming a plating layer having excellent adhesion. Is preferable.
- the plating solution may contain, as a reducing agent, one or more selected from the group consisting of formaldehyde (CH 2 O), potassium tetrahydroate, dimethylamine borane, glyoxylic acid, and phosphinic acid.
- the amount of the reducing agent in the plating solution is preferably 0.1 g / L or more, 0.5 g / L or more, or 1.0 g / L or more, and preferably 15.0 g / L or less, or 12 It is 0.0 g / L or less, or 9.0 g / L or less.
- the plating solution may further contain an additional complexing agent in addition to EDTA (ethylenediaminetetraacetic acid).
- additional complexing agent include Rochelle salt, triethanolamine, ammonium sulfate, citric acid, glycine and the like.
- the amount of the additional complexing agent in the plating solution is preferably 5 g / L or more, or 7 g / L or more, or 10 g / L or more, and preferably 50 g / L or less, or 45 g / L or less, or. It is 40 g / L or less.
- the plating solution may further contain a surfactant, if desired.
- the plating solution may be a commercially available product.
- Sulcup ELC-SP available from Uemura Kogyo Co., Ltd.
- Melplate CU-390 available from Meltex Inc.
- Melplate CU-5100P and Okuno Pharmaceutical Industry Co., Ltd.
- OPC Copper NCA, C4500 available from Roam and Hearth Co., Ltd.
- PrintganthUPplus available from Atotech Inc.
- Cu-510 available from McDermid Japan Co., Ltd., and the like can be used.
- the temperature of the electroless plating bath with the plating solution is preferably 25 ° C. or higher, 30 ° C. or higher, or 35 ° C. or higher, and preferably 80 ° C. or lower, or 70 ° C., because faster plating growth can be expected. Below, or below 65 ° C.
- the plating time is preferably 5 minutes or more, or 10 minutes or more, and preferably 60 minutes or less, 50 minutes or less, or 40 minutes or less.
- the layer thickness of the plated layer is preferably 300 nm or more, 500 nm or more, or 1 ⁇ m or more in that the current required for the structure with a conductive pattern can be passed. Alternatively, it is 2 ⁇ m or more, preferably 100 ⁇ m or less, 50 ⁇ m or less, or 30 ⁇ m or less.
- electroless plating may be followed by electroplating.
- a general electroplating method can be applied to electrolytic plating.
- the electrode and the conductive base material to be plated are placed in a solution (plating bath) containing copper ions.
- a direct current is applied between the electrode and the conductive base material from the external direct current power source.
- a current can be applied to the reduced copper layer by connecting a jig (for example, a clip) connected to one of the electrode pairs of the external DC power supply to the reduced copper layer on the conductive substrate.
- a jig for example, a clip
- a copper sulfate bath for example, a copper sulfate bath, a borohydride copper bath, a copper cyanide bath, and a copper pyrophosphate bath can be used. From the viewpoint of safety and productivity, a copper sulfate bath and a copper pyrophosphate bath are preferable.
- the copper sulfate plating bath for example, a copper sulfate acidic copper sulfate plating bath containing copper sulfate pentahydrate, sulfuric acid and chlorine is preferably used.
- the concentration of copper sulfate pentahydrate in the copper sulfate plating bath is preferably 50 g / L or more, or 100 g / L or more, and preferably 300 g / L or less, or 200 g / L or less.
- the concentration of sulfuric acid is preferably 40 g / L or more, or 80 g / L or more, and preferably 160 g / L or less, or 120 g / L or less.
- the solvent for the plating bath is usually water.
- the temperature of the plating bath is preferably 20 ° C. or higher, or 30 ° C. or higher, and preferably 60 ° C. or lower, or 50 ° C. or lower.
- the current density during the electrolytic treatment is preferably 1 A / dm 2 or more, or 2 A / dm 2 or more, and preferably 15 A / dm 2 or less, or 10 A / dm 2 or less.
- the copper pyrophosphate plating bath for example, a plating bath containing copper pyrophosphate and potassium pyrophosphate is suitable.
- the concentration of copper pyrophosphate in the copper pyrophosphate plating bath is preferably 60 g / L or more, or 70 g / L or more, and preferably 110 g / L or less, or 90 g / L or less.
- the concentration of potassium pyrophosphate is preferably 240 g / L or more, or 300 g / L or more, and preferably 470 g / L or less, or 400 g / L or less.
- the solvent for the plating bath is usually water.
- the pH of the plating bath is preferably 8.0 or more, or 8.2 or more, and preferably 9.0 or less, or 8.8 or less. Ammonia water or the like may be added for adjusting the pH value.
- the temperature of the plating bath is preferably 20 ° C. or higher, or 30 ° C. or higher, and preferably 60 ° C. or lower, or 50 ° C. or lower.
- the current density during the electrolytic treatment is preferably 0.5 A / dm 2 or more, or 1 A / dm 2 or more, and preferably 10 A / dm 2 or less, or 7 A / dm 2 or less.
- the plating bath for electrolytic plating may further contain a surfactant.
- the dispersion containing copper oxide is printed on the substrate by an inkjet method, a gravure printing method, or the like (FIG. 2 (e)) to form a coating film, and then dried.
- a copper oxide-containing film (copper oxide layer) 2c containing copper oxide and a dispersant is formed on the base material 1 (FIG. 2 (f)).
- a copper oxide-containing film is immersed in a degreasing solution containing a compound containing an amino group to perform a degreasing step, and then a plating step is performed (FIG. 2 (g)).
- the degreasing step may be omitted.
- a part or all of the copper oxide in the copper oxide layer may be reduced.
- a layer 2d of copper oxide and / or copper that is, a reduced product of copper oxide
- a plated copper layer 2e are formed on the base material 1 (FIG. 2 (h)).
- the conductive layer can be produced at a very low cost and with low energy, so that the structure with a conductive pattern can be produced more easily.
- the structure with a conductive pattern of the present disclosure may have an additional layer in addition to the base material and the conductive layer as described above.
- Examples of the additional layer include a resin layer and a solder layer.
- a part of the conductive layer is covered with a resin layer. Since a part of the conductive layer is covered with the resin layer, oxidation of the conductive pattern is prevented and reliability is improved. Further, since the conductive layer has a portion not covered with the resin layer, the parts can be electrically joined.
- An example of a resin layer is a sealing material layer.
- the resin layer can be formed by, for example, transfer molding, compression molding, or the like.
- the resin used include polyethylene (PE), polypropylene (PP), polyimide (PI), polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), etc.), and polyether sulfone.
- PES Polycarbonate
- PC Polyvinyl Alcohol
- PVB Polyvinyl Butyral
- POM Polyacetal
- Polyallylate PAR
- Polyetherketone PA6, PA66, etc.
- Polyamideimide PAI
- PEI polyphenylene ether
- PPS polyphenylene sulfide
- PEK polyetherketone
- PEEK polyetheretherketone
- PPA poly Ethernitrile
- PBI polybenzimidazole
- silicone polymer polysiloxane
- PMMA Polymethylmethacrylate resin
- PMMA polybutene, polypentene, ethylene-propylene copolymer, ethylene-butene-diene copolymer, polybutadiene, polyisoprene, ethylene-propylene-diene copolymer, butyl rubber, polymethylpentene (PMP) ), Polystyrene (PS), styrene
- the encapsulant layer protects the conductive pattern from external stress in the finished product after manufacturing (the structure with the conductive pattern itself and the product containing it), and provides long-term stability of the structure with the conductive pattern. Can be improved.
- the moisture permeability of the encapsulant layer which is an example of the resin layer, is preferably 1.0 g / m 2 / day or less, more preferably 0.8 g / m 2 / day, from the viewpoint of ensuring good long-term stability. Below, it is more preferably 0.6 g / m 2 / day or less.
- the moisture permeability is a value measured by the cup method.
- the encapsulant layer can be a functional layer that imparts an oxygen barrier function to the structure with a conductive pattern even after the oxygen barrier layer that may be used during manufacturing is peeled off.
- Other functions include scratch resistance when handling a structure with a conductive pattern, stain resistance to protect the structure with a conductive pattern from external contamination, and a conductive pattern when a tough resin is used. It may have functions such as improving the rigidity of the structure.
- solder layer In one embodiment, it is preferable that the solder layer is formed on a part of the conductive layer on the side opposite to the base material side.
- the solder layer can connect the conductive layer to other members.
- the solder layer can be formed by, for example, a reflow method.
- the solder layer includes Sn-Pb system, Pb-Sn-Sb system, Sn-Sb system, Sn-Pb-Bi system, Bi-Sn system, Sn-Cu system, Sn-Pb-Cu system, Sn-In system, and the like. It may be a solder layer such as Sn-Ag system, Sn-Pb-Ag system, Pb-Ag system and the like.
- the thickness of the solder layer is preferably 0.1 ⁇ m or more, 0.5 ⁇ m or more, and preferably 2 mm or less, or 1 mm or less.
- ⁇ Conductive pattern structure manufacturing kit> One aspect of the present disclosure provides a conductive pattern structure manufacturing kit comprising at least two of the dispersion of the present disclosure, the plating solution of the present disclosure, and the reducing solution of the present disclosure.
- the kit may be advantageous for easily producing a structure with a conductive pattern having good interlayer adhesion.
- one aspect of the present disclosure is Dispersion containing copper oxide-containing particles, Plating solution containing EDTA (ethylenediaminetetraacetic acid) and the following formula: (R 1 ) 2 NC-COOR 2 (In the formula, R 1 and R 2 are independently hydrogen or monovalent groups, and a plurality of R 1s in the formula may be the same or different from each other.)
- the conductive pattern structure manufacturing kit preferably contains the dispersion of the present disclosure and the plating solution of the present disclosure, or contains the dispersion liquid of the present disclosure, the plating solution of the present disclosure, and the reduction liquid of the present disclosure.
- ⁇ Evaluation method> Hydrazine was quantified by the standard addition method. To 50 ⁇ L of the sample (dispersion), 33 ⁇ g of hydrazine, 33 ⁇ g of surrogate substance (hydrazine 15 N 2 H 4 ), and 1 ml of benzaldehyde 1% by mass acetonitrile solution were added. Finally, 20 ⁇ L of phosphoric acid was added, and after 4 hours, GC / MS (gas chromatograph / mass spectrometry) measurement was performed.
- the mass of the added hydrazine / the mass of the added surrogate substance was taken on the x-axis, and the peak area value of the hydrazine / the peak area value of the surrogate substance was taken on the y-axis to obtain a calibration curve by the standard addition method.
- the value of the Y-intercept obtained from the calibration curve was divided by the mass of the added hydrazine / the mass of the added surrogate substance to obtain the mass of hydrazine.
- the average particle size of the dispersion was measured by the cumulant method using FPAR-1000 manufactured by Otsuka Electronics.
- Example 1 806 g of copper (II) acetate monohydrate (manufactured by Kanto Chemical Co., Inc.) was dissolved in a mixed solvent of 7560 g of distilled water (manufactured by Kyoei Pharmaceutical Co., Ltd.) and 3494 g of 1,2-propylene glycol (manufactured by Kanto Chemical Co., Inc.). The liquid temperature was adjusted to -5 ° C by an external temperature controller. Add 235 g of hydrazine monohydrate (manufactured by Tokyo Chemical Industry Co., Ltd.) over 20 minutes, stir for 30 minutes in a nitrogen atmosphere, bring the liquid temperature to 25 ° C with an external temperature controller, and stir for 90 minutes in a nitrogen atmosphere. bottom.
- the dispersion was well dispersed and the average particle size was 36 nm.
- the amount of hydrazine was 3000 mass ppm.
- the obtained dispersion was printed on a polyimide (PI) film (manufactured by Toray DuPont, Kapton 500H, thickness 125 ⁇ m) by inkjet printing.
- the solvent in the coating film was volatilized in the atmosphere of 25 ° C. for 24 hours to obtain Sample 1 which is a copper oxide-containing film.
- the film thickness of the obtained sample 1 was 400 nm.
- the OPC copper NCA (aqueous solution, EDTA amount in the plating bath of about 2.6% by mass) manufactured by In The Back Pharmaceutical Industry Co., Ltd., which is an electroless plating solution containing EDTA (ethylenediaminetetraacetic acid), was heated to 60 ° C.
- Sample 1 was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water. After washing with water, the resistance value of this sample was measured by the 4-terminal method and found to be 80 ⁇ ⁇ cm.
- the thickness of the sample after the treatment was 1000 nm, and the thickness of the plating layer was 600 nm. It was confirmed that copper was plated and grown.
- Example 2 806 g of copper (II) acetate monohydrate (manufactured by Kanto Chemical Co., Inc.) was dissolved in a mixed solvent of 7560 g of distilled water (manufactured by Kyoei Pharmaceutical Co., Ltd.) and 3494 g of 1,2-propylene glycol (manufactured by Kanto Chemical Co., Inc.). The liquid temperature was adjusted to -5 ° C by an external temperature controller. Add 235 g of hydrazine monohydrate (manufactured by Tokyo Chemical Industry Co., Ltd.) over 20 minutes, stir for 30 minutes in a nitrogen atmosphere, bring the liquid temperature to 25 ° C with an external temperature controller, and stir for 90 minutes in a nitrogen atmosphere. bottom.
- the dispersion was well dispersed and the average particle size was 36 nm.
- the amount of hydrazine was 3000 mass ppm.
- Colcoat PX manufactured by Colcoat Co., Ltd.
- a PET film Cosmo Shine A4100 manufactured by Toyobo Co., Ltd., thickness 100 ⁇ m
- the dispersion was printed on the PET film with a coating layer by inkjet printing.
- the solvent in the coating film was volatilized in the atmosphere of 25 ° C. for 24 hours to obtain Sample 2 which is a copper oxide-containing film.
- the film thickness of the obtained sample 2 was 400 nm.
- the OPC copper NCA manufactured by Okuno Pharmaceutical Industry Co., Ltd. which is an electroless plating solution, was heated to 60 ° C., and the sample 2 was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water. After washing with water, the resistance value of this sample was measured by the 4-terminal method and found to be 93 ⁇ ⁇ cm. The thickness of the sample after the treatment was 800 nm, and the thickness of the plating layer was 400 nm. It was confirmed that copper was plated and grown.
- Example 3 806 g of copper (II) acetate monohydrate (manufactured by Kanto Chemical Co., Inc.) was dissolved in a mixed solvent of 7560 g of distilled water (manufactured by Kyoei Pharmaceutical Co., Ltd.) and 3494 g of 1,2-propylene glycol (manufactured by Kanto Chemical Co., Inc.). The liquid temperature was adjusted to -5 ° C by an external temperature controller. Add 235 g of hydrazine monohydrate (manufactured by Tokyo Chemical Industry Co., Ltd.) over 20 minutes, stir for 30 minutes in a nitrogen atmosphere, bring the liquid temperature to 25 ° C with an external temperature controller, and stir for 90 minutes in a nitrogen atmosphere. bottom.
- the dispersion was well dispersed and the average particle size was 36 nm.
- the amount of hydrazine was 3000 mass ppm.
- the obtained dispersion was printed on a polyimide film (manufactured by Toray DuPont, Kapton 500H, thickness 125 ⁇ m) by inkjet printing.
- the film thickness of the obtained sample 3 was 200 nm.
- N, N-di (2-hydroxyethyl) glycine was dissolved in water to prepare a 32% by mass solution. This was used as a reducing solution, and the copper oxide-containing membrane was immersed in the reducing solution heated to 80 ° C. for 5 minutes. Then, it was washed with ethanol to obtain a copper film.
- the OPC copper NCA manufactured by Okuno Pharmaceutical Industry Co., Ltd. which is an electroless plating solution, was heated to 60 ° C., and the sample was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water. After washing with water, the resistance value of this sample was measured by the 4-terminal method and found to be 12 ⁇ ⁇ cm. The thickness of the sample after the treatment was 1500 nm, and the thickness of the plating layer was 1300 nm. It was confirmed that copper was plated and grown.
- Example 4 806 g of copper (II) acetate monohydrate (manufactured by Kanto Chemical Co., Inc.) was dissolved in a mixed solvent of 7560 g of distilled water (manufactured by Kyoei Pharmaceutical Co., Ltd.) and 3494 g of 1,2-propylene glycol (manufactured by Kanto Chemical Co., Inc.). The liquid temperature was adjusted to -5 ° C by an external temperature controller. Add 235 g of hydrazine monohydrate (manufactured by Tokyo Chemical Industry Co., Ltd.) over 20 minutes, stir for 30 minutes in a nitrogen atmosphere, bring the liquid temperature to 25 ° C with an external temperature controller, and stir for 90 minutes in a nitrogen atmosphere. bottom.
- the dispersion was well dispersed and the average particle size was 30 nm.
- the amount of hydrazine was 3000 mass ppm.
- the obtained dispersion was applied to a polyimide film (manufactured by Toray Industries, Ltd., Kapton 500H, thickness 125 ⁇ m) by a spin coating method, dried in the air at 25 ° C. for 24 hours, and the solvent in the coating film was volatilized.
- Sample 4 which is a copper oxide-containing film was obtained.
- the film thickness of the obtained sample 4 was 1200 nm.
- N, N-di (2-hydroxyethyl) glycine was dissolved in water to prepare a 16% by mass solution. This was used as a reducing solution, and the copper oxide-containing membrane was immersed in the reducing solution heated to 73 ° C. for 10 minutes. Then, it was washed with water to obtain a copper film.
- ACL-009 manufactured by C. Uyemura & Co., Ltd. which is a pretreatment liquid for plating, was dissolved in water so as to have a concentration of 50 mL / L to obtain a treatment liquid.
- Sample 4 was immersed in the treatment liquid heated to 50 ° C. for 5 minutes. After the treatment, the sample was taken out and washed with water.
- the OPC copper NCA manufactured by Okuno Pharmaceutical Industry Co., Ltd. which is an electroless plating solution, was heated to 60 ° C., and the sample was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water. After washing with water, the resistance value of this sample was measured by the 4-terminal method and found to be 36 ⁇ ⁇ cm. The thickness of the sample after the treatment grew by 7200 nm as compared with that before the plating treatment. It was confirmed that copper was plated and grown.
- Example 5 Sample 5 was obtained in the same manner as in Example 4 except that the temperature of the N, N-di (2-hydroxyethyl) glycine aqueous solution was set to 60 ° C. When the resistance value of this sample was measured by the 4-terminal method, it was 19 ⁇ ⁇ cm. The thickness of the sample after the treatment grew by 8200 nm as compared with that before the plating treatment. It was confirmed that copper was plated and grown.
- Example 6 Sample 6 was obtained in the same manner as in Example 5 except that the time for immersing the copper oxide-containing film in the N, N-di (2-hydroxyethyl) glycine aqueous solution was 5 minutes. When the resistance value of this sample was measured by the 4-terminal method, it was 21 ⁇ ⁇ cm. The thickness of the sample after the treatment grew by 8200 nm as compared with that before the plating treatment. It was confirmed that copper was plated and grown.
- Example 7 The same as in Example 6 except that the concentration of the N, N-di (2-hydroxyethyl) glycine aqueous solution is 8% by mass and the temperature of the N, N-di (2-hydroxyethyl) glycine aqueous solution is 73 ° C. Sample 7 was obtained. When the resistance value of this sample was measured by the 4-terminal method, it was 13 ⁇ ⁇ cm. The thickness of the sample after the treatment grew by 9600 nm as compared with that before the plating treatment. It was confirmed that copper was plated and grown.
- Example 8 Sample 8 was obtained in the same manner as in Example 7 except that the time for immersing the copper oxide-containing film in the N, N-di (2-hydroxyethyl) glycine aqueous solution was 10 minutes. When the resistance value of this sample was measured by the 4-terminal method, it was 10 ⁇ ⁇ cm. The thickness of the sample after the treatment grew by 9600 nm as compared with that before the plating treatment. It was confirmed that copper was plated and grown.
- Example 9 806 g of copper (II) acetate monohydrate (manufactured by Kanto Chemical Co., Inc.) was dissolved in a mixed solvent of 7560 g of distilled water (manufactured by Kyoei Pharmaceutical Co., Ltd.) and 3494 g of 1,2-propylene glycol (manufactured by Kanto Chemical Co., Inc.). The liquid temperature was adjusted to -5 ° C by an external temperature controller. Add 235 g of hydrazine monohydrate (manufactured by Tokyo Chemical Industry Co., Ltd.) over 20 minutes, stir for 30 minutes in a nitrogen atmosphere, bring the liquid temperature to 25 ° C with an external temperature controller, and stir for 90 minutes in a nitrogen atmosphere. bottom.
- the dispersion was well dispersed and the average particle size was 28 nm.
- the amount of hydrazine was 3000 mass ppm.
- the obtained dispersion was applied to a polyimide film (manufactured by Toray Industries, Ltd., Kapton 500H, thickness 125 ⁇ m) by a spin coating method, dried in the air at 25 ° C. for 24 hours, and the solvent in the coating film was volatilized.
- Sample 9 which is a copper oxide-containing film was obtained.
- the film thickness of the obtained sample 9 was 500 nm.
- Citric acid was dissolved in water to prepare a 24% by mass solution. This was used as a reducing solution, and the copper oxide-containing membrane was immersed in the reducing solution heated to 60 ° C. for 5 minutes. Then, it was washed with water to obtain a copper film.
- ACL-009 manufactured by C. Uyemura & Co., Ltd. which is a pretreatment liquid for plating, was dissolved in water so as to have a concentration of 50 mL / L to obtain a treatment liquid.
- Sample 9 was immersed in the treatment liquid heated to 50 ° C. for 5 minutes. After the treatment, the sample was taken out and washed with water.
- the OPC copper NCA manufactured by Okuno Pharmaceutical Industry Co., Ltd. which is an electroless plating solution, was heated to 60 ° C., and the sample was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water.
- the thickness of the sample after the treatment grew by 1300 nm as compared with that before the plating treatment.
- the resistance value of this sample was measured by the 4-terminal method, it was 13 ⁇ ⁇ cm. It was confirmed that copper was plated and grown.
- Example 10 (Evaluation of inkjet aptitude)
- the dispersion (ink) is the same procedure as in Example 1 except that the solvent of the dispersion is changed to butanol (Example 10), hexanol (Example 11), heptanol (Example 12), or octanol (Example 13). ) was prepared.
- the intermittent stability of the inkjet was evaluated for the obtained ink. The time until nozzle clogging occurred when intermittent discharge was performed was measured and evaluated as 1 hour or more: A, 30 minutes or more and less than 1 hour: B, and less than 30 minutes: C.
- the evaluation conditions for intermittent stability are as follows.
- Judgment of discharge presence Visual inspection with DropWatcher
- the butanol solvent ink was evaluated C, the hexanol solvent ink was evaluated B, and the heptanol solvent ink and the octanol solvent ink were evaluated A. From these results, it was found that the ink jet suitability was good in the ink using heptanol or octanol as a solvent.
- the dispersion was well dispersed and the average particle size was 21 nm.
- the amount of hydrazine was 3000 mass ppm.
- the obtained dispersion was applied to a polyimide film (manufactured by Toray Industries, Ltd., Kapton 500H, thickness 125 ⁇ m) by a spin coating method, and heated in an oven at 100 ° C. in the air for 1 hour to volatilize the solvent in the coating film.
- a sample 10 which is a copper oxide-containing film was obtained.
- the film thickness of the obtained sample 10 was 1100 nm.
- a solution containing glycol (PEG) (100 mg / L) and an aqueous solution of sodium hydroxide (added until the pH reached 12) was heated to 60 ° C., and the sample was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water. When the sample was observed, all the formed copper oxide-containing film was peeled off, and the copper plating growth could not be confirmed.
- PEG glycol
- sodium hydroxide added until the pH reached 12
- ⁇ Comparative Example 3> As a pretreatment for plating, a liquid obtained by mixing sulfuric acid (36% by mass), ethylene glycol (4.3% by mass), polyoxyethylene lauryl ether (1.7% by mass), and water (58% by mass) is mixed with water by volume. A sample 12 was obtained in the same manner as in Comparative Example 1 except that the sample diluted 10 times was heated to 40 ° C. and the sample was immersed for 5 minutes. When the sample was observed, all the copper oxide-containing film formed was peeled off, and the copper plating growth could not be confirmed.
- the dispersion was well dispersed and the average particle size was 30 nm.
- the amount of hydrazine was 3000 mass ppm.
- the obtained dispersion was applied to a polyimide film (manufactured by Toray DuPont, Kapton 500H, thickness 125 ⁇ m) by a spray method, dried in the air at 25 ° C. for 24 hours, and the solvent in the coating film was volatilized.
- Sample 13 which is a copper oxide-containing film was obtained.
- the film thickness of the obtained sample was 200 nm.
- N, N-di (2-hydroxyethyl) glycine was dissolved in water to prepare a 16% by mass solution. This was used as a reducing solution, and the copper oxide-containing membrane was immersed in the reducing solution heated to 73 ° C. for 30 minutes. Then, it was washed with water to obtain a copper film.
- a solution containing glycol (PEG) (100 mg / L) and an aqueous solution of sodium hydroxide (added until the pH reached 12) was heated to 60 ° C., and the sample was immersed for 30 minutes. After the treatment, the sample was taken out and washed with water. When the sample was observed, all the formed copper oxide-containing film was peeled off, and the copper plating growth could not be confirmed.
- PEG glycol
- sodium hydroxide added until the pH reached 12
- the resistance values were evaluated as less than 15 ⁇ ⁇ cm: 3 points, 15 ⁇ ⁇ cm or more and less than 50 ⁇ ⁇ cm: 2 points, and 50 ⁇ ⁇ cm or more: 1 point.
- the plating growth film thickness was evaluated as less than 1000 nm: 1 point, 1000 nm or more and less than 5000 nm: 2 points, and 5000 nm or more: 3 points.
- the sum of the evaluation points of the resistance value and the evaluation points of the plating growth film thickness was taken as the total evaluation points. The results are shown in Table 1.
- the present invention is not limited to the above-described embodiment or embodiment. Design changes and the like may be added to the above-described embodiment or embodiment based on the knowledge of those skilled in the art, and the above-mentioned embodiments or examples may be arbitrarily combined, and such modifications and the like may be added. It is included in the scope of the present invention.
- One aspect of the present invention can be suitably applied to the manufacture of printed wiring boards, electronic devices, electromagnetic wave shields, antistatic films and the like.
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Abstract
Description
本発明の一態様は、かかる状況に鑑み、製造工程が簡便であり、かつ層間密着性が良好な導電性パターン付構造体を形成できる、導電性パターン付構造体の製造方法を提供することを目的とする。
[1] 酸化銅含有粒子を含む分散体を基材に印刷して塗布膜を得る塗布膜形成工程と、
前記塗布膜に、めっき液を用いて無電解めっきを行うめっき工程と
を含み、
前記めっき液は、EDTA(エチレンジアミン四酢酸)を含む、導電性パターン付構造体の製造方法。
[2] 前記めっき工程の前に還元工程を更に含む、上記態様1に記載に導電性パターン付構造体の製造方法。
[3] 前記還元工程が湿式還元工程である、上記態様2に記載に導電性パターン付構造体の製造方法。
[4] 前記還元工程は、下記式:
(R1)2N-C-COOR2
(式中、R1及びR2は、各々独立に水素又は1価の基であり、式中の複数のR1は互いに同じでも異なってもよい。)
で表されるグリシン化合物を含む溶液に前記塗布膜を浸漬することを含む、上記態様2又は3に記載の導電性パターン付構造体の製造方法。
[5] 前記グリシン化合物は、N,N-ジ(2-ヒドロキシエチル)グリシンである、上記態様4に記載の導電性パターン付構造体の製造方法。
[6] 前記溶液は水溶液であり、前記グリシン化合物の濃度が1質量%以上、50質量%以下である、上記態様4又は5に記載の導電性パターン付構造体の製造方法。
[7] 前記めっき工程の前に脱脂工程を更に含む、上記態様1~6のいずれかに記載に導電性パターン付構造体の製造方法。
[8] 前記塗布膜形成工程は、インクジェット印刷によって行う、上記態様1~7のいずれかに記載の導電性パターン付構造体の製造方法。
[9] 前記塗布膜形成工程と前記めっき工程との間に、前記塗布膜を乾燥する乾燥工程を更に含む、上記態様1~8のいずれかに記載の導電性パターン付構造体の製造方法。
[10] 前記分散体は、リン酸エステルを含む分散剤を含む、上記態様1~9のいずれかに記載の導電性パターン付構造体の製造方法。
[11] 前記分散剤の酸価(mgKOH/g)は、20以上、130以下である、上記態様10に記載の導電性パターン付構造体の製造方法。
[12] 前記分散体は還元剤を含有し、前記還元剤はヒドラジンである、上記態様1~11のいずれかに記載の導電性パターン付構造体の製造方法。
[13] 前記分散体は、1-ヘキサノール、1-ヘプタノール、及び1-オクタノールからなる群から選択される1種以上の分散媒を含む、上記態様1~12のいずれかに記載の導電性パターン付構造体の製造方法。
[14] 前記酸化銅含有粒子は、平均粒子径が1nm以上100nm以下である、上記態様1~13のいずれかに記載の導電性パターン付構造体の製造方法。
[15] 前記めっき液は、銅イオン源及び還元剤を含む、上記態様1~14のいずれかに記載の導電性パターン付構造体の製造方法。
[16] 前記銅イオン源は、CuSO4、CuCl2、CuCl、CuNO3、及びCu3(PO4)2からなる群から選択される1種以上である、上記態様15に記載の導電性パターン付構造体の製造方法。
[17] 前記還元剤は、ホルムアルデヒド、テトラヒドロ酸カリウム、ジメチルアミンボラン、グリオキシル酸、及びホスフィン酸からなる群から選択される1種以上である、上記態様15又は16に記載の導電性パターン付構造体の製造方法。
[18] 前記基材が密着層を有し、
前記塗布膜形成工程において、前記分散体を前記密着層に印刷する、上記態様1~17のいずれかに記載の導電性パターン付構造体の製造方法。
[19] 酸化銅含有粒子を含む分散体、
EDTA(エチレンジアミン四酢酸)を含むめっき液、及び
下記式:
(R1)2N-C-COOR2
(式中、R1及びR2は、各々独立に水素又は1価の基であり、式中の複数のR1は互いに同じでも異なってもよい。)
で表されるグリシン化合物を含む還元液、
からなる群から選択される少なくとも2つを含む、導電性パターン構造体製造キット。
一態様において、めっき液は、EDTA(エチレンジアミン四酢酸)を含む。
以下、各工程の好適例について説明する。
本工程では、酸化銅含有粒子を含む分散体(本開示で、酸化銅インクともいう。)を基材に塗布して、塗布膜を得る。
分散体(酸化銅インク)は、酸化銅含有粒子を含む。酸化銅含有粒子は、典型的には酸化銅からなるが、本発明の効果を損なわない範囲で他の成分を含み得る。分散体は、分散媒、分散剤、及び/又は、還元剤を更に含んでもかまわない。
酸化銅としては、酸化第一銅(Cu2O)及び酸化第二銅(CuO)が挙げられるが、酸化第一銅が好ましい。酸化第一銅は、価格的にも銅であるがゆえに銀等の貴金属類と比較し安価である点、及びマイグレーションが生じ難い点で有利である、酸化銅としては、市販品又は合成品を用いてよい。
(1)ポリオール溶剤中に、水と銅アセチルアセトナト錯体を加え、いったん有機銅化合物を加熱溶解させ、次に、反応に必要な水を後添加し、さらに昇温して有機銅の還元温度で加熱して加熱還元する方法。
(2)有機銅化合物(例えば銅-N-ニトロソフェニルヒドロキシアミン錯体)を、ヘキサデシルアミン等の保護剤存在下、不活性雰囲気中で、300℃程度の高温で加熱する方法。
(3)水溶液中に溶解した銅塩をヒドラジンで還元する方法。
この中では(3)の方法は操作が簡便で、かつ、平均粒子径の小さい酸化第一銅が得られるので好ましい。
(1)塩化第二銅又は硫酸銅の水溶液に水酸化ナトリウムを加えて水酸化銅を生成させた後、加熱する方法。
(2)硝酸銅、硫酸銅、炭酸銅、水酸化銅等を空気中で600℃程度の温度に加熱して熱分解する方法。
この中で(1)の方法は粒子径が小さい酸化第二銅が得られるので好ましい。
分散媒は、酸化銅含有粒子を分散させることができるものである。一態様において、分散媒は、分散剤を溶解させることができる。酸化銅インクを用いて導電性パターンを形成するという観点から、分散媒の揮発性が作業性に影響を与える。したがって、分散媒は、導電性パターンの形成方法、例えば塗布の方式(特に印刷)に適するものであることが好ましい。すなわち、分散媒は分散性と印刷の作業性とに合わせて選択することが好ましい。
分散剤としては、酸化銅を分散媒中に分散させることができる化合物を使用できる。分散剤の数平均分子量は、好ましくは、300以上、又は350以上、又は400以上であり、好ましくは、300,000以下、又は200,000以下、又は150,000以下である。なお本開示の数平均分子量は、ゲルパーミエーションクロマトグラフィを用い、標準ポリスチレン換算で求められる値である。数平均分子量が300以上であると、絶縁性に優れ、分散体の分散安定性への寄与も大きい傾向があり、300,000以下であると、取扱い性の点で好ましい。分散剤は、酸化銅に対する親和性を有する基を有していることが好ましい。この観点から、分散剤は、好ましくは、リン含有有機物を含み又はリン含有有機物であり、又は、リン酸エステルを含み又はリン酸エステルであり、又は、ポリマーのリン酸エステルを含み又はポリマーのリン酸エステルである。ポリマーのリン酸エステルとして、例えば、下記式(1):
で示される構造は、酸化銅、特に酸化第一銅への吸着性、及び基材への密着性に優れるため、好ましい。
化学式(1)中、lは、より好ましくは1~5000、更に好ましくは1~3000である。
化学式(1)中、mは、より好ましくは1~5000、更に好ましくは1~3000である。
化学式(1)中、nは、より好ましくは1~5000、更に好ましくは1~3000である。
一態様において、分散体は還元剤を含む。還元剤としては、ヒドラジン、ナトリウム、水素化ホウ酸ナトリウム、ヨウ化カリウム、亜硫酸塩、チオ硫酸ナトリウム、蟻酸、シュウ酸、アスコルビン酸、硫化鉄(II)、塩化スズ(II)、水素化ジイソブチルアルミニウム、カーボン等が挙げられ、好ましくはヒドラジンである。ヒドラジンはヒドラジン水和物の形態であってもよい(すなわち、本開示のヒドラジンとは、ヒドラジン水和物も包含する概念である。)。分散体がヒドラジンを含むことにより、めっき工程において、ヒドラジンが酸化銅、特に酸化第一銅の還元に寄与し、より抵抗の低い還元銅層(銅含有膜として)を形成することができる。また、ヒドラジンは、分散体の分散安定性の維持においても有利であり、めっき時の生産性向上の観点からも好ましい。分散体中のヒドラジンは、酸化銅含有粒子中の成分として、及び/又は酸化銅含有粒子とは別に、存在してよい。
図1は、本発明の一態様で使用できる分散体(酸化銅インク)における、酸化銅とリン酸エステル塩との関係を示す断面模式図である。図1を参照し、本発明の一態様において、酸化銅インク100が、酸化銅12とリン酸エステル塩13(分散剤としてのリン酸エステルの例)とを含む場合、酸化銅12の周囲を、リン酸エステル塩13が、リン13aを内側に、エステル塩13bを外側にそれぞれ向けて取り囲んでいる。リン酸エステル塩13は電気絶縁性を示すため、互いに隣接する酸化銅12間の電気的導通は、リン酸エステル塩13によって妨げられている。また、リン酸エステル塩13は、立体障害効果により酸化銅インク100の凝集を抑制している。したがって、酸化銅12は半導体である(すなわちある程度の導電性を有する)が、電気絶縁性を示すリン酸エステル塩13で覆われているので、酸化銅インク100は電気絶縁性を示す。
本実施形態で用いられる基材は、塗布膜を形成する表面を有するものであり、配線パターンを形成するための回路基板シートの基板材料等を例示できる。基材は、無機材料若しくは有機材料又はこれらの組合せで構成されてよく、一態様において密着層を有してよい。
分散体の塗布方法としては、インクジェット印刷、スクリーン印刷、凹版ダイレクト印刷、凹版オフセット印刷、フレキソ印刷、オフセット印刷等を用いることができる。塗布は、ダイコート、スピンコート、スリットコート、バーコート、ナイフコート、スプレーコート、ディップコート等の方法を用いて実施できる。塗布方法は、好ましくはインクジェット印刷である。インクジェット法は印刷版が不要でかつ、配線間に余分な成分が付着することがないので、マイグレーション性に優れる。
本開示の方法の一態様は、塗布膜形成工程とめっき工程との間に、塗布膜を乾燥する乾燥工程を更に含んでよい。乾燥工程では、塗布膜形成工程で得た塗布膜を乾燥させる。乾燥工程は分散媒を気化させるための工程である。分散媒は、室温で気化させてもよいし、オーブン、真空乾燥等の方法で気化させてもよい。基材の耐熱性を考慮すると、150℃以下の温度で乾燥させることが好ましく、100℃以下の温度で乾燥させることがさらに好ましい。また、乾燥時に窒素又は水素混合窒素(例えば水素と窒素との合計100体積%中水素を3体積%程度含有する混合気体)を導入しても良い。
本開示の方法の一態様は、めっき工程の前に還元工程を含んでよい。還元工程においては、乾燥工程を経た又は経ていない塗布膜である酸化銅含有膜を還元することで銅含有膜を得る。本工程では、酸化銅含有膜中の酸化銅含有粒子を還元して銅を生成させ、銅自体の融着及び一体化により銅含有膜(還元銅層)を形成することができる。ただし、酸化銅含有粒子をそのままめっきする場合は、本工程を省略してよい。還元方法としては、窒素雰囲気下で100℃以上、500℃以下の温度で還元を行う方法、水素混合窒素(例えば水素と窒素との合計100体積%中水素を3体積%程度含有する混合気体)中で100℃以上、500℃以下の温度で還元を行う方法、還元液中に酸化銅含有膜を浸漬する方法(すなわち湿式還元)等が挙げられる。一態様において、還元工程は、酸化銅含有膜を還元液に浸漬する工程、すなわち湿式還元工程である。
(R1)2N-C-COOR2 (2)
(式中、R1及びR2は、各々独立に水素又は1価の基であり、式中の複数のR1は互いに同じでも異なってもよい。)
で表されるグリシン化合物(本開示で、単にグリシン化合物ともいう。)、L-アスコルビン酸及びその塩、チオグリコール酸、塩酸ヒドロキシルアミン、ハイドロキノン、ハイドロサルファイト、エリソルビン酸、エリソルビン酸塩、チオ尿素、錫系還元剤、鉄系還元剤、亜鉛系還元剤などが挙げられる。
上記式(2)中、R2は、好ましくは、水素、又は炭素数1~3の炭化水素基である。
湿式還元を行う場合には、当該湿式還元後、適切な洗浄液を用いて、未還元部及び還元液を除去してもよい。これにより、基材の上に清浄な還元領域が残される。一方、洗浄工程を行わなくてもよい。いずれの場合も、導電性パターンとしての還元領域によって導電性が付与された基材(以下、導電性基材ともいう。)が得られる。ただし、酸化銅含有膜をそのままめっきする場合は、本工程を省略できる場合がある。
本開示の方法の一態様は、めっき工程の前に、酸化銅含有膜又は銅含有膜を脱脂する工程を有してよい。一態様においては、酸化銅を還元せずに直接脱脂することで、生産性を向上させることができる。また別の一態様においては、酸化銅を還元(例えば前述の還元工程で)した後脱脂してよい。脱脂方法としては、UV法、湿式脱脂法等が挙げられる。脱脂工程により、その後のめっきの成長速度が速くなり、生産性が向上する。また、本工程は、めっき後の導電性層(すなわち、めっき層、及び酸化銅含有膜中の酸化銅が還元される態様においては更に還元銅層)の空隙率低減、すなわち、最終的な導電性層の空隙率に寄与する。なお、無電解めっきと共に脱脂を行ってもよく、この場合、脱脂工程を省略してもよい。
本発明の一態様においては、乾燥工程、還元工程及び/又は脱脂工程を経た又は経ていない塗布膜(一態様において、乾燥工程後の、湿式還元工程及び/又は脱脂工程を経た又は経ていない塗布膜)としての、酸化銅含有膜又は銅含有膜に対して、無電解めっきを行う。一態様においては、酸化銅含有膜を還元せずに直接めっきを行うことで、生産性を向上させることができる。無電解めっきは、酸化銅含有膜中の酸化銅の一部若しくは全部を還元してよく、又は当該酸化銅を還元しなくてもよい。また別の一態様においては、酸化銅含有膜を還元(例えば湿式還元)して得た銅含有膜を無電解めっきすることで、導電性を向上させることができる。無電解めっきにより、酸化銅及び/又はその還元物である銅を含む層と、めっき層とで構成された導電性パターンを形成できる。これにより、導電性パターン付構造体を製造できる。無電解めっきは、パターンへの適用性の広さの観点で有利である。めっき方法としては、一般的な無電解めっき法を適用してよい。例えば、脱脂工程又は洗浄工程と共に、無電解めっきを行ってよい。
以下、図2を参照して、導電性パターン付構造体の製造方法のより具体的な好適例を説明する。
まず、水とプロピレングリコール(PG)との混合溶媒A中に酢酸銅Bを溶かし、ヒドラジンCを加えて攪拌する(図2(a))。
次いで、遠心分離(図2(b))によって、生成物溶液(上澄み2a)と酸化第一銅(沈殿物2b)とを固液分離する(図2(c))。
次いで、沈殿物2bに、分散剤D及びアルコールEを加え、沈殿物を分散させて、酸化銅を含む分散体を得る(図2(d))。
次いで、酸化銅を含む分散体を、インクジェット法又はグラビア印刷法等によって基材上に印刷して(図2(e))塗布膜を形成し、次いで乾燥させる。この結果、基材1上に、酸化銅及び分散剤を含む酸化銅含有膜(酸化銅層)2cが形成される(図2(f))。
以上の手順で、導電性パターン付構造体を製造できる。
本開示の導電性パターン付構造体は、前述したような基材及び導電性層に加え、追加の層を有してもよい。追加の層としては、樹脂層及びハンダ層を例示できる。
一態様においては、導電性層の一部が樹脂層で覆われていることが好ましい。導電性層の一部が樹脂層で覆われていることにより、導電性パターンの酸化が防止され、信頼性が向上する。また、導電性層に樹脂層で覆われていない部分が存在することで、部品を電気的に接合することができる。
一態様において、導電性層の基材側とは反対側の一部にハンダ層が形成されていることが好ましい。ハンダ層によって導電性層と他の部材とを接続できる。ハンダ層は例えばリフロー法によって形成できる。ハンダ層は、Sn-Pb系、Pb-Sn-Sb系、Sn-Sb系、Sn-Pb-Bi系、Bi-Sn系、Sn-Cu系、Sn-Pb-Cu系、Sn-In系、Sn-Ag系、Sn-Pb-Ag系、Pb-Ag系等のハンダ層であってよい。ハンダ層の厚みは、好ましくは、0.1μm以上、又は0.5μm以上であり、好ましくは、2mm以下、又は1mm以下である。
本開示の一態様は、本開示の分散体、本開示のめっき液、及び本開示の還元液のうち、少なくとも2つを含む、導電性パターン構造体製造キットを提供する。当該キットは、層間密着性が良好な導電性パターン付構造体を簡便に製造するのに有利であり得る。より具体的には、本開示の一態様は、
酸化銅含有粒子を含む分散体、
EDTA(エチレンジアミン四酢酸)を含むめっき液、及び
下記式:
(R1)2N-C-COOR2
(式中、R1及びR2は、各々独立に水素又は1価の基であり、式中の複数のR1は互いに同じでも異なってもよい。)
で表されるグリシン化合物を含む還元液、
からなる群から選択される、少なくとも2つを含む、導電性パターン構造体製造キットを提供する。本開示の導電性パターン構造体製造キットが含み得る分散体、めっき液及び還元液の各々の好ましい構成例は、本開示において前述したとおりであってよく、ここでは説明を繰り返さない。導電性パターン構造体製造キットは、好ましくは、本開示の分散体及び本開示のめっき液を含み、又は、本開示の分散液、本開示のめっき液及び本開示の還元液を含む。
[ヒドラジン定量方法]
標準添加法によりヒドラジンの定量を行った。
サンプル(分散体)50μLに、ヒドラジン33μg、サロゲート物質(ヒドラジン15N2H4)33μg、ベンズアルデヒド1質量%アセトニトリル溶液1mlを加えた。最後にリン酸20μLを加え、4時間後、GC/MS(ガスクロマトグラフ/質量分析)測定を行った。
分散体の平均粒子径は、大塚電子製FPAR-1000を用いてキュムラント法によって測定した。
触診式膜厚測定機を用いて測定した。
装置:Bruker社製DektakXT
Stylus Force: 3mg
Speed:200μm/s
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及び1-ヘプタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
装置:DIMATIXマテリアルプリンターDMP-2831
ヘッド:DMC-11610
電圧:25V
印刷後、25℃の大気下で24時間塗布膜内の溶媒を揮発させて、酸化銅含有膜である試料1を得た。得られた試料1の膜厚は400nmであった。
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及び1-ヘプタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
装置:DIMATIXマテリアルプリンターDMP-2831
ヘッド:DMC-11610
電圧:25V
印刷後、25℃の大気下で24時間塗布膜内の溶媒を揮発させて、酸化銅含有膜である試料2を得た。得られた試料2の膜厚は400nmであった。
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及び1-ヘプタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
装置:DIMATIXマテリアルプリンターDMP-2831
ヘッド:DMC-11610
電圧:25V
印刷後、25℃の大気下で24時間乾燥し、塗布膜内の溶媒を揮発させて、酸化銅含有膜である試料3を得た。得られた試料3の膜厚は200nmであった。
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及び1-ヘプタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
N,N-ジ(2-ヒドロキシエチル)グリシン水溶液の温度を60℃とする以外は実施例4と同様にして試料5を得た。4端子法による本試料の抵抗値を測定したところ、19μΩ・cmであった。処理後の試料の厚みはめっき処理前に比べて8200nm成長していた。銅がめっき成長することが確認できた。
N,N-ジ(2-ヒドロキシエチル)グリシン水溶液に酸化銅含有膜を浸漬する時間を5分間とする以外は実施例5と同様にして試料6を得た。4端子法による本試料の抵抗値を測定したところ、21μΩ・cmであった。処理後の試料の厚みはめっき処理前に比べて8200nm成長していた。銅がめっき成長することが確認できた。
N,N-ジ(2-ヒドロキシエチル)グリシン水溶液の濃度を8質量%とし、N,N-ジ(2-ヒドロキシエチル)グリシン水溶液の温度を73℃とする以外は実施例6と同様にして試料7を得た。4端子法による本試料の抵抗値を測定したところ、13μΩ・cmであった。処理後の試料の厚みはめっき処理前に比べて9600nm成長していた。銅がめっき成長することが確認できた。
N,N-ジ(2-ヒドロキシエチル)グリシン水溶液に酸化銅含有膜を浸漬する時間を10分間とする以外は実施例7と同様にして試料8を得た。4端子法による本試料の抵抗値を測定したところ、10μΩ・cmであった。処理後の試料の厚みはめっき処理前に比べて9600nm成長していた。銅がめっき成長することが確認できた。
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及び1-ヘプタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
(インクジェット適性の評価)
分散体の溶媒をブタノール(実施例10)、ヘキサノール(実施例11)、ヘプタノール(実施例12)、又はオクタノール(実施例13)に変更した他は実施例1と同様の手順で分散体(インク)を調製した。得られたインクについて、インクジェットの間欠安定性を評価した。間欠吐出を行った時にノズルのつまりが起きるまでの時間を計測し、1時間以上:A,30分以上1時間未満:B,30分未満:Cとして評価した。間欠安定性の評価条件は以下のとおりである。
装置:DIMATIXマテリアルプリンターDMP-2831
ヘッド:DMC-11610
電圧:25V
吐出ノズル数:7(No.5~11)
吐出有無判断:DropWatcherでの目視
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及びエタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
めっき液に硫酸ニッケル0.5g/Lを加える以外は比較例1と同様にして試料11を得た。試料を観察すると、形成されていた酸化銅含有膜はすべて剥がれており、銅のめっき成長は確認できなかった。
めっきの前処理として、硫酸(36質量%)、エチレングリコール(4.3質量%)、ポリオキシエチレンラウリルエーテル(1.7質量%)、水(58質量%)を混合した液体を水で体積を10倍に薄めたものを40℃に加温し、試料を5分間浸漬する以外は比較例1と同様にして試料12を得た。試料を観察すると、形成していた酸化銅含有膜はすべて剥がれており、銅のめっき成長は確認できなかった。
蒸留水(共栄製薬株式会社製)7560g、1,2-プロピレングリコール(関東化学株式会社製)3494gの混合溶媒中に酢酸銅(II)一水和物(関東化学株式会社製)806gを溶かし、外部温調器によって液温を-5℃にした。ヒドラジン一水和物(東京化成工業株式会社製)235gを20分間かけて加え、窒素雰囲気下で30分間攪拌した後、外部温調器によって液温を25℃にし、窒素雰囲気下で90分間攪拌した。攪拌後、遠心分離で上澄みと沈殿物に分離した。得られた沈殿物390gに、DISPERBYK-145(ビッグケミー製)(酸価:76mgKOH/g、アミン価:71mgKOH/gのリン含有有機物)13.7g(分散剤含有量4g)、及び1-ヘプタノール(関東化学株式会社製)907gを加え、窒素雰囲気下でホモジナイザーを用いて分散し、酸化第一銅を含む分散体1365gを得た。
導電性能の観点から、抵抗値は低い方が望ましい。また、生産性の観点から、めっきの成長速度は速い方が望ましい。抵抗値について、15μΩ・cm未満:3点、15μΩ・cm以上50μΩ・cm未満:2点、50μΩ・cm以上:1点として評価した。また、めっき成長膜厚について、1000nm未満:1点、1000nm以上5000nm未満:2点、5000nm以上:3点として評価した。加えて、抵抗値の評価点とめっき成長膜厚の評価点との合計を評価点合計とした。結果を表1に示す。
12 酸化銅
13 リン酸エステル塩
13a リン
13b エステル塩
1 基材
2a 上澄み
2b 沈殿物
2c 酸化銅含有膜
2d 酸化銅及び/又は銅の層
2e めっき銅層
Claims (19)
- 酸化銅含有粒子を含む分散体を基材に印刷して塗布膜を得る塗布膜形成工程と、
前記塗布膜に、めっき液を用いて無電解めっきを行うめっき工程と
を含み、
前記めっき液は、EDTA(エチレンジアミン四酢酸)を含む、導電性パターン付構造体の製造方法。 - 前記めっき工程の前に還元工程を更に含む、請求項1に記載に導電性パターン付構造体の製造方法。
- 前記還元工程が湿式還元工程である、請求項2に記載に導電性パターン付構造体の製造方法。
- 前記還元工程は、下記式:
(R1)2N-C-COOR2
(式中、R1及びR2は、各々独立に水素又は1価の基であり、式中の複数のR1は互いに同じでも異なってもよい。)
で表されるグリシン化合物を含む溶液に前記塗布膜を浸漬することを含む、請求項2又は3に記載の導電性パターン付構造体の製造方法。 - 前記グリシン化合物は、N,N-ジ(2-ヒドロキシエチル)グリシンである、請求項4に記載の導電性パターン付構造体の製造方法。
- 前記溶液は水溶液であり、前記グリシン化合物の濃度が1質量%以上、50質量%以下である、請求項4又は5に記載の導電性パターン付構造体の製造方法。
- 前記めっき工程の前に脱脂工程を更に含む、請求項1~6のいずれか一項に記載に導電性パターン付構造体の製造方法。
- 前記塗布膜形成工程は、インクジェット印刷によって行う、請求項1~7のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記塗布膜形成工程と前記めっき工程との間に、前記塗布膜を乾燥する乾燥工程を更に含む、請求項1~8のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記分散体は、リン酸エステルを含む分散剤を含む、請求項1~9のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記分散剤の酸価(mgKOH/g)は、20以上、130以下である、請求項10に記載の導電性パターン付構造体の製造方法。
- 前記分散体は還元剤を含有し、前記還元剤はヒドラジンである、請求項1~11のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記分散体は、1-ヘキサノール、1-ヘプタノール、及び1-オクタノールからなる群から選択される1種以上の分散媒を含む、請求項1~12のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記酸化銅含有粒子は、平均粒子径が1nm以上100nm以下である、請求項1~13のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記めっき液は、銅イオン源及び還元剤を含む、請求項1~14のいずれか一項に記載の導電性パターン付構造体の製造方法。
- 前記銅イオン源は、CuSO4、CuCl2、CuCl、CuNO3、及びCu3(PO4)2からなる群から選択される1種以上である、請求項15に記載の導電性パターン付構造体の製造方法。
- 前記還元剤は、ホルムアルデヒド、テトラヒドロ酸カリウム、ジメチルアミンボラン、グリオキシル酸、及びホスフィン酸からなる群から選択される1種以上である、請求項15又は16に記載の導電性パターン付構造体の製造方法。
- 前記基材が密着層を有し、
前記塗布膜形成工程において、前記分散体を前記密着層に印刷する、請求項1~17のいずれか一項に記載の導電性パターン付構造体の製造方法。 - 酸化銅含有粒子を含む分散体、
EDTA(エチレンジアミン四酢酸)を含むめっき液、及び
下記式:
(R1)2N-C-COOR2
(式中、R1及びR2は、各々独立に水素又は1価の基であり、式中の複数のR1は互いに同じでも異なってもよい。)
で表されるグリシン化合物を含む還元液、
からなる群から選択される少なくとも2つを含む、導電性パターン構造体製造キット。
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