WO2013108696A1 - 導電ペーストおよび導電パターンの製造方法 - Google Patents
導電ペーストおよび導電パターンの製造方法 Download PDFInfo
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- WO2013108696A1 WO2013108696A1 PCT/JP2013/050250 JP2013050250W WO2013108696A1 WO 2013108696 A1 WO2013108696 A1 WO 2013108696A1 JP 2013050250 W JP2013050250 W JP 2013050250W WO 2013108696 A1 WO2013108696 A1 WO 2013108696A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
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- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
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- 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
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
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- 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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- 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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C09D201/06—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
- C09D201/08—Carboxyl groups
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0047—Photosensitive materials characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0218—Composite particles, i.e. first metal coated with second metal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0221—Insulating particles having an electrically conductive coating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/032—Materials
- H05K2201/0326—Inorganic, non-metallic conductor, e.g. indium-tin oxide [ITO]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/05—Patterning and lithography; Masks; Details of resist
- H05K2203/0502—Patterning and lithography
- H05K2203/0514—Photodevelopable thick film, e.g. conductive or insulating paste
Definitions
- the present invention relates to a conductive paste for forming a conductive pattern.
- alkali-soluble organic components imparted with photosensitivity generally have a high acid value, so that tin oxide is corroded even when antimony-doped tin oxide fine powder is added, and connection reliability with ITO is obtained.
- adhesion was deteriorated and residues were generated.
- An object of the present invention is to solve the above-mentioned problems, and to provide a conductive paste suitable for obtaining a conductive pattern, which has high connection reliability with ITO and includes a compound having a high acid value, and is capable of fine patterning. It is to obtain a method for producing a conductive pattern.
- the present invention comprises a composite particle (A) obtained by coating the surface of a core made of an inorganic material with an antimony-containing compound, a compound (B) having an acid value in the range of 30 to 250 mgKOH / g, and a conductive filler (C). And a conductive pattern manufacturing method characterized in that the conductive paste is coated on a substrate, dried, exposed, developed and then cured at a temperature of 100 ° C. or higher and 300 ° C. or lower. .
- a wiring of a narrow pitch can be formed not only on a rigid board
- the conductive paste of the present invention is a composite particle (A) obtained by coating an antimony-containing compound on the surface of a core made of an inorganic material, a compound (B) having an acid value in the range of 30 to 250 mgKOH / g, and a conductive filler ( C).
- the conductive paste of the present invention is applied onto a substrate, dried as necessary to remove the solvent, and then subjected to exposure, development, and a curing process at a temperature of 100 ° C. to 300 ° C. to achieve a desired conductive property on the substrate.
- a pattern can be obtained.
- the conductive pattern obtained by using the paste of the present invention is a composite of an organic component and an inorganic component, and the conductivity is developed when the conductive fillers are brought into contact with each other by curing shrinkage during curing.
- the composite particle (A) formed by coating an antimony-containing compound on the surface of a core material made of an inorganic material, contained in the conductive paste of the present invention, has a thickness of 1 nm or more on the surface of the core material made of an inorganic material.
- the antimony-containing compound include antimony sulfide, antimony trioxide, antimony pentoxide, lead antimonate, indium antimonide, and antimony-doped tin oxide.
- Inorganic materials that form the core include titanium oxide, barium sulfate, aluminum oxide, silicon dioxide, zinc oxide, magnesium oxide, calcium oxide, iron oxide, nickel oxide, ruthenium oxide, indium oxide, copper oxide, carbon, silver (Ag ), Gold (Au), copper (Cu), platinum (Pt), lead (Pb), tin (Sn), nickel (Ni), aluminum (Al), tungsten (W), molybdenum (Mo), chromium (Cr ) And titanium (Ti).
- the volume average particle diameter of the composite particles (A) obtained by coating the surface of the core material made of an inorganic material with an antimony-containing compound is preferably 0.03 to 10 ⁇ m, more preferably 0.1 to 6 ⁇ m.
- the volume average particle size is 0.03 ⁇ m or more, the dispersibility and dispersion stability are high, and the generation of aggregates can be suppressed, so that the effect of connection reliability with ITO can be sufficiently obtained with respect to the added amount. Therefore, it is preferable.
- a volume average particle size of 6 ⁇ m or less is preferable because the surface smoothness, pattern accuracy, and dimensional accuracy of the printed circuit pattern are improved.
- the volume average particle diameter can be determined by a Coulter counter method, a photon correlation method, a laser diffraction method, or the like.
- the aspect ratio of the composite particles (A) in which the surface of the core material made of an inorganic material is coated with an antimony-containing compound (A) is in the range of 1.5 to 50, the tap density becomes low, and the connection reliability with ITO is low with a low addition amount.
- the aspect ratio is more preferably in the range of 10 to 50.
- the amount of the composite particles (A) formed by coating the surface of the core material made of an inorganic material with the antimony-containing compound is within the range of 0.1 to 20% by weight with respect to the total solid content in the conductive paste. And more preferably 1 to 10% by weight.
- the content of 0.1% by weight or more is preferable because the contact probability with ITO is improved and the connection reliability with ITO is particularly high. Moreover, it is preferable to make it 20% by weight or less because the influence on the conductivity of the conductive pattern can be reduced.
- the total solid content is obtained by removing the solvent from the conductive paste.
- the compound (B) having an acid value in the range of 30 to 250 mgKOH / g contained in the conductive paste of the present invention refers to a compound having at least one carboxyl group in the molecule. More than seeds can be used.
- compound (B) examples include acrylic copolymers, polyester resins, polyurethane resins and the like.
- the acrylic copolymer is a copolymer containing at least an acrylic monomer as a copolymerization component, and as a specific example of the acrylic monomer, all compounds having a carbon-carbon double bond can be used.
- Alkali solubility is imparted to the acrylic copolymer by using an unsaturated acid such as an unsaturated carboxylic acid as a monomer.
- unsaturated acid include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, vinyl acetate, and acid anhydrides thereof. By adding these to the molecular chain, the acid value of the polymer can be adjusted.
- a part of the unsaturated acid in the acrylic polymer obtained by using the unsaturated acid such as the unsaturated carboxylic acid as a monomer as a monomer, a group that reacts with the unsaturated acid such as glycidyl (meth) acrylate, and the unsaturated acid can be prepared.
- the acid value of the compound (B) contained in the conductive paste of the present invention needs to be 30 to 250 mgKOH / g from the viewpoint of alkali solubility, and if the acid value is 30 mgKOH / g or more, the soluble part is dissolved in the developer. When the acid value is 250 mgKOH / g or less, the development tolerance can be widened.
- the acid value is measured according to JIS-K0070 (1992).
- the glass transition temperature of the compound (B) contained in the conductive paste of the present invention is preferably ⁇ 10 to 60 ° C., more preferably 10 to 50 ° C.
- Tg is ⁇ 10 ° C. or higher
- the tackiness of the dried film can be suppressed, and when it is 10 ° C. or higher, the shape stability particularly with respect to temperature change is increased.
- Tg is 60 ° C. or lower
- flexibility is exhibited at room temperature
- when it is 50 ° C. or lower internal stress at the time of bending can be relaxed, and generation of cracks can be particularly suppressed.
- the glass transition temperature of the compound (B) contained in the conductive paste of the present invention can also be determined by differential scanning calorimetry (DSC) measurement, but the copolymerization ratio of monomers as copolymerization components and the homopolymer of each monomer It can calculate by following formula (1) using the glass transition temperature of this. In the present invention, this value is used for those that can be calculated, and the cases where the glass transition temperature of the homopolymer is not known are determined from the DSC measurement results.
- DSC differential scanning calorimetry
- Tg is the glass transition temperature of the polymer (unit: K)
- T1, T2, T3... Are the glass transition temperatures of the homopolymer of monomer 1, monomer 2, monomer 3,.
- W2, W3,... Are the weight-based copolymerization ratios of monomer 1, monomer 2, monomer 3,.
- the conductive paste of the present invention can contain one or a mixture of two or more compounds (B) having an acid value in the range of 30 to 250 mgKOH / g, and an acid value of 30 to 250 mgKOH / g. In addition to the compound (B) in the above range, an acid value of less than 30 mgKOH / g or greater than 250 mgKOH / g may be used in combination.
- the compound (B) is a photosensitive compound having an unsaturated double bond
- the conductive paste of the present invention preferably contains a compound that absorbs light of a short wavelength such as ultraviolet rays and decomposes to generate a radical or a photopolymerization initiator (D) that generates a radical by causing a hydrogen abstraction reaction. .
- 1,2-octanedione 1- [4- (phenylthio) -2- (O-benzoyloxime)], 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis (2, 4,6-trimethylbenzoyl) -phenylphosphine oxide, ethanone, 1- [9-ethyl-6-2 (2-methylbenzoyl) -9H-carbazol-3-yl] -1- (O-acetyloxime), Benzophenone, methyl o-benzoylbenzoate, 4,4'-bis (dimethylamino) benzophenone, 4,4'-bis (diethylamino) benzophenone, 4,4'-dichlorobenzophenone, 4-benzoyl-4'-methyldiphenyl ketone , Dibenzyl ketone, fluorenone, 2,2'-diethoxyacetophenone, 2,2-dimeth Ci-2-phenylacetophen
- the amount of the photopolymerization initiator (D) added is 100 parts by weight of the compound (B) having an acid value in the range of 30 to 250 mgKOH / g. , Preferably 0.05 to 30 parts by weight, and more preferably 5 to 20 parts by weight.
- the addition amount of the photopolymerization initiator (D) to 100 parts by weight of the compound (B) to be 5 parts by weight or more, the curing density of the exposed part can be increased, and the remaining film ratio after development can be increased. .
- the amount of addition of the photopolymerization initiator (D) to 100 parts by weight of the compound (B) is 20 parts by weight or less, thereby suppressing excessive light absorption particularly at the upper part of the coating film by the photopolymerization initiator (D). And it can suppress that a conductive pattern becomes a reverse taper shape and adhesiveness with a base material falls.
- the conductive paste of the present invention can be improved in sensitivity by adding a sensitizer together with the photopolymerization initiator (D), or can expand the wavelength range effective for the reaction.
- the sensitizer examples include 2,4-diethylthioxanthone, isopropylthioxanthone, 2,3-bis (4-diethylaminobenzal) cyclopentanone, 2,6-bis (4-dimethylaminobenzal) cyclohexanone, 2,6-bis (4-dimethylaminobenzal) -4-methylcyclohexanone, Michler's ketone, 4,4-bis (diethylamino) benzophenone, 4,4-bis (dimethylamino) chalcone, 4,4-bis (diethylamino) Chalcone, p-dimethylaminocinnamylidene indanone, p-dimethylaminobenzylidene indanone, 2- (p-dimethylaminophenylvinylene) isonaphthothiazole, 1,3-bis (4-dimethylaminophenylvinylene) isonaphthothiazo
- the addition amount is usually 0.05 to 10 parts by weight with respect to 100 parts by weight of the compound (B) having an acid value in the range of 30 to 250 mgKOH / g. It is preferably within the range, more preferably 0.1 to 10 parts by weight.
- the addition amount with respect to 100 parts by weight of the compound (B) 0.1 parts by weight or more the effect of improving the photosensitivity is sufficiently exhibited, and the addition amount with respect to 100 parts by weight of the compound (B) is 10 parts by weight or less. By doing so, it is possible to suppress excessive light absorption particularly in the upper part of the coating film, the conductive pattern having a reverse taper shape, and a decrease in adhesion to the substrate.
- the conductive filler (C) contained in the conductive paste of the present invention contains at least one of Ag, Au, Cu, Pt, Pb, Sn, Ni, Al, W, Mo, ruthenium oxide, Cr, Ti, and indium.
- these conductive fillers can be used alone, as an alloy, or as a mixed powder.
- covered the surface of the insulating particle or electroconductive particle with the above-mentioned component can be used similarly.
- Ag, Cu and Au are preferable from the viewpoint of conductivity, and Ag is more preferable from the viewpoint of cost and stability.
- the volume average particle diameter of the conductive filler (C) is preferably 0.1 to 10 ⁇ m, more preferably 0.5 to 6 ⁇ m.
- the volume average particle diameter is preferably 0.1 to 10 ⁇ m, more preferably 0.5 to 6 ⁇ m.
- the contact probability between the conductive fillers is improved, the specific resistance value of the conductive pattern to be produced, and the disconnection probability can be lowered, and the ultraviolet rays at the time of exposure are film The inside can be smoothly transmitted, and fine patterning becomes easy.
- the volume average particle size is 6 ⁇ m or less, the surface smoothness, pattern accuracy, and dimensional accuracy of the printed circuit pattern are improved.
- the volume average particle diameter can be determined by a Coulter counter method.
- the amount of the conductive filler (C) added is preferably in the range of 70 to 95% by weight, more preferably 80 to 90% by weight, based on the total solid content in the conductive paste.
- the amount of the conductive filler (C) added is preferably in the range of 70 to 95% by weight, more preferably 80 to 90% by weight, based on the total solid content in the conductive paste.
- the conductive paste of the present invention may contain a solvent.
- Solvents include N, N-dimethylacetamide, N, N-dimethylformamide, N-methyl-2-pyrrolidone, dimethylimidazolidinone, dimethyl sulfoxide, diethylene glycol monoethyl ether, diethylene glycol monoethyl ether acetate, ⁇ -butyrolactone, lactic acid Examples include ethyl, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, ethylene glycol mono-n-propyl ether, diacetone alcohol, tetrahydrofurfuryl alcohol, propylene glycol monomethyl ether acetate and the like.
- a solvent can be used individually by 1 type, or 2 or more types can be mixed and used for it. The solvent may be added later for the purpose of adjusting the viscosity after preparing the paste.
- additives such as a plasticizer, a leveling agent, a surfactant, a silane coupling agent, an antifoaming agent, and a pigment can be blended as long as the desired properties are not impaired.
- plasticizer examples include dibutyl phthalate, dioctyl phthalate, polyethylene glycol, glycerin and the like.
- leveling agent examples include a special vinyl polymer and a special acrylic polymer.
- silane coupling agents methyltrimethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, hexamethyldisilazane, 3-methacryloxypropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, vinyltrimethoxysilane Etc.
- the conductive paste of the present invention is produced using a disperser, a kneader or the like. Specific examples of these include, but are not limited to, a three-roller, a ball mill, and a planetary ball mill.
- the paste of the present invention is applied on a substrate, and when the conductive paste contains a solvent, it is heated as necessary to volatilize the solvent and dried. Thereafter, exposure is performed through a pattern formation mask, and a desired pattern is formed on the substrate through a development process. And it cures at the temperature of 100 degreeC or more and 300 degrees C or less, and produces a conductive pattern.
- the substrate used in the present invention is, for example, PET film, polyimide film, polyester film, aramid film, epoxy resin substrate, polyetherimide resin substrate, polyetherketone resin substrate, polysulfone resin substrate, glass substrate, silicon wafer, alumina substrate , An aluminum nitride substrate, a silicon carbide substrate, a decorative layer forming substrate, an insulating layer forming substrate, and the like, but are not limited thereto.
- Examples of methods for applying the conductive paste of the present invention to a substrate include spin coating using a spinner, spray coating, roll coating, screen printing, blade coater, die coater, calendar coater, meniscus coater, bar coater and the like.
- the coating film thickness varies depending on the coating method, the solid content concentration of the composition, the viscosity, and the like, but is usually applied so that the film thickness after drying is in the range of 0.1 to 50 ⁇ m.
- the solvent is removed from the coating film applied on the substrate as necessary.
- the method for removing the solvent include heat drying using an oven, a hot plate, infrared rays, and vacuum drying. Heat drying is preferably performed in the range of 50 ° C. to 180 ° C. for 1 minute to several hours.
- pattern processing is performed on the coating film after removing the solvent by photolithography.
- a light source used for exposure it is preferable to use i-line (365 nm), h-line (405 nm), and g-line (436 nm) of a mercury lamp.
- Developer solutions for alkali development include tetramethylammonium hydroxide, diethanolamine, diethylaminoethanol, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, triethylamine, diethylamine, methylamine, dimethylamine, dimethylaminoethyl acetate
- An aqueous solution of a compound such as dimethylaminoethanol, dimethylaminoethyl methacrylate, cyclohexylamine, ethylenediamine or hexamethylenediamine is preferred.
- these aqueous solutions may contain polar solvents such as N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide and ⁇ -butyrolactone, alcohols such as methanol, ethanol and isopropanol.
- polar solvents such as N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide and ⁇ -butyrolactone
- alcohols such as methanol, ethanol and isopropanol.
- Esters such as ethyl lactate and propylene glycol monomethyl ether acetate
- ketones such as cyclopentanone, cyclohexanone, isobutyl ketone, and methyl isobutyl ketone may be used alone or as a developer.
- what added surfactant to these alkaline aqueous solution can also be
- Developers for organic development include N-methyl-2-pyrrolidone, N-acetyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, dimethyl sulfoxide, hexamethyl phosphortriamide, etc. Can be used alone or in combination with methanol, ethanol, isopropyl alcohol, xylene, water, methyl carbitol, ethyl carbitol and the like.
- the development can be performed by spraying the developer on the coating film surface while the substrate is allowed to stand or rotate, immersing the substrate in the developer, or applying ultrasonic waves while immersing.
- a rinsing treatment with water may be performed.
- alcohols such as ethanol and isopropyl alcohol
- esters such as ethyl lactate and propylene glycol monomethyl ether acetate may be added to water for rinsing treatment.
- the paste composition film is cured to develop conductivity.
- the curing method include oven drying, inert oven, hot plate, heat drying using infrared rays, vacuum drying, and the like.
- the curing temperature is preferably in the range of 100 to 300 ° C, more preferably 120 to 180 ° C. By setting the heating temperature to 120 ° C. or higher, the volume shrinkage of the resin can be increased, and the specific resistivity is decreased.
- the conductive paste of the present invention can obtain high conductivity with a relatively low temperature cure of 180 ° C. or lower, it can be used on a substrate having low heat resistance or in combination with a material having low heat resistance. Thus, a conductive pattern can be produced through a curing process.
- a conductive paste is applied on a PET film to a dry thickness of 10 ⁇ m, dried in a drying oven at 90 ° C. for 5 minutes, and a group of straight lines arranged in a constant line and space (L / S) is defined as one unit.
- a conductive pattern was obtained by exposure, development, and curing at 130 ° C. for 1 hour through a photomask having a light-transmitting pattern having 9 types of units having different values of / S.
- the L / S values of each unit were 500/500, 250/250, 100/100, 50/50, 40/40, 30/30, 25/25, 20/20, and 15/15 (respective line widths).
- a conductive paste is applied on a PET film so as to have a dry thickness of 10 ⁇ m, dried in a drying oven at 90 ° C. for 10 minutes, exposed through a photomask having a light-transmitting portion A having a pattern shown in FIG.
- a conductive pattern for specific resistance measurement was obtained by curing in a drying oven at 130 ° C. for 1 hour.
- the line width of the conductive pattern is 0.400 mm, and the line length is 80 mm.
- the ends of the obtained pattern were connected with a surface resistance meter, the surface resistance value was measured, and the specific resistivity was calculated by applying to the following calculation formula.
- FIG. 2 schematically shows a sample used for the flexibility test.
- a conductive paste is applied on a 10 mm long and 100 mm wide rectangular PET film (thickness 40 ⁇ m) to a dry thickness of 10 ⁇ m and dried in a drying oven at 90 ° C. for 10 minutes.
- a photomask with A is placed and exposed so that the translucent part is at the center of the sample, developed, cured in a drying oven at 130 ° C. for 1 hour to form a conductive pattern, and measured for resistance using a tester did.
- the conductive pattern was bent so that the inner side and the outer side were alternately bent, the sample short side B and the sample short side C were brought into contact, and the bending operation to return to the original was repeated 100 times, and then the resistance value was measured again with a tester.
- the change amount of the resistance value was 20% or less, and the case where the conductive pattern was not cracked, peeled off or disconnected was marked with ⁇ , and the others were marked with x.
- a conductive paste is applied on a transparent conductive film obtained by sputtering ITO on a PET film to a dry thickness of 10 ⁇ m, and dried in a drying oven at 90 ° C. for 10 minutes.
- the light-transmitting portion A having the pattern shown in FIG.
- the sample was exposed through a photomask, developed, and cured in a drying oven at 130 ° C. for 1 hour to obtain a connection reliability evaluation sample with ITO.
- the line width of the conductive pattern is 100 ⁇ m, the distance between the lines is 5 mm, and the terminal portion is a circle having a diameter of 2 mm.
- inorganic particles ET-300W (trade name, manufactured by Ishihara Sangyo Co., Ltd., composite particles in which a core material made of titanium oxide is coated with antimony-doped tin oxide, aspect ratio 1.1, volume average particle size 0.03 to 0.06 ⁇ m) ET-500W (trade name, manufactured by Ishihara Sangyo Co., Ltd., composite particles in which a core made of titanium oxide is coated with antimony-doped tin oxide, aspect ratio 1.1, volume average particle diameter 0.2 to 0.3 ⁇ m) FT-1000 (trade name, manufactured by Ishihara Sangyo Co., Ltd., composite particles in which a core made of titanium oxide is coated with antimony-doped tin oxide, aspect ratio 12.9, volume average particle diameter 0.18 ⁇ m) Pastoran (registered trademark) 4410 (trade name, manufactured by Mitsui Mining & Smelting Co., Ltd., composite particles obtained by
- Synthesis Example 2 Compound B-2 whose acid value is in the range of 30 to 250 mg KOH / g Ethylene oxide-modified bisphenol A diacrylate FA-324A (product name, manufactured by Hitachi Chemical Co., Ltd.) / EA / AA copolymer (copolymerization ratio: 50 parts by weight / 10 parts by weight / 15 parts by weight) and glycidyl methacrylate ( GMA) was subjected to an addition reaction of 5 parts by weight.
- a reaction vessel in a nitrogen atmosphere was charged with 150 g of diethylene glycol monoethyl ether acetate and heated to 80 ° C. using an oil bath.
- a mixture of 50 g of ethylene oxide-modified bisphenol A diacrylate FA-324A, 20 g of ethyl acrylate, 15 g of acrylic acid, 0.8 g of 2,2′-azobisisobutyronitrile and 10 g of diethylene glycol monoethyl ether acetate was added. It was added dropwise over time. After completion of the dropping, a polymerization reaction was further performed for 6 hours. Thereafter, 1 g of hydroquinone monomethyl ether was added to terminate the polymerization reaction.
- Epoxy ester 70PA (manufactured by Kyoeisha Chemical Co., Ltd., molecular weight: 332.4, aliphatic chain type epoxy acrylate) / 2-ethylhexyl methacrylate (2-EHMA) / styrene (St) / acrylic acid (AA)
- Diethylene glycol monoethyl in a reaction vessel in a nitrogen atmosphere 150 g of ether acetate was charged and the temperature was raised to 80 ° C.
- the acid value of the obtained compound B-5 was 89 mgKOH / g, and the glass transition temperature obtained from DSC measurement was 27.2 ° C.
- ⁇ Conductive filler (C) The materials listed in Table 1 and those having a volume average particle size were used. The volume average particle size was determined by the following method. ⁇ Photopolymerization initiator (D) IRGACURE (registered trademark) 369 (trade name, manufactured by Ciba Japan Co., Ltd.) ⁇ Measurement of volume average particle diameter> The volume average particle diameter of the conductive filler (C) was measured with a dynamic light scattering particle size distribution meter manufactured by HORIBA.
- Monomer Light acrylate BP-4EA (manufactured by Kyoeisha Chemical Co., Ltd.) ⁇ Solvent: Diethylene glycol monoethyl ether acetate (manufactured by Tokyo Chemical Industry Co., Ltd.) Antimony-containing compound not containing inorganic particles and conductive tin oxide particles SN-100P (trade name, manufactured by Ishihara Sangyo Co., Ltd.) FS-10P (trade name, manufactured by Ishihara Sangyo Co., Ltd.) T-1 (trade name, manufactured by Mitsubishi Materials Electronics Chemical Co., Ltd.) Example 1 In a 100 mL clean bottle, put 10.0 g of compound B-1, 0.50 g of photopolymerization initiator IRGACURE (registered trademark) 369 (manufactured by Ciba Japan Co., Ltd.) and 5.0 g of diethylene glycol monoethyl ether acetate. Taro "(registered trademark; trade name, ARE-310, manufactured by
- the obtained paste was applied on a PET film having a thickness of 100 ⁇ m by screen printing, and dried in a drying oven at 90 ° C. for 10 minutes. Thereafter, full-line exposure was performed using an exposure apparatus “PEM-6M” (trade name, manufactured by Union Optics Co., Ltd.) with an exposure amount of 200 mJ / cm 2 (wavelength 365 nm conversion), and 50% with a 0.25% Na 2 CO 3 solution. Second-second immersion development was performed, rinsed with ultrapure water, and then cured in a drying oven at 140 ° C. for 30 minutes. The film thickness of the patterned conductive pattern was 10 ⁇ m.
- Example 2 A conductive paste having the composition shown in Table 1 was produced in the same manner as in Example 1, and the evaluation results are shown in Table 2.
- the conductive pastes of Examples 1 to 11 were all excellent in patterning property and connection reliability, but the conductive pastes of Comparative Examples 1 to 3 were all free from residue even in the pattern having a line / space of 500 ⁇ m / 500 ⁇ m. It was generated and the patterning property was inferior, the resistance change rate was high, and the connection reliability was inferior.
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Abstract
Description
光重合開始剤(D)の添加量としては、酸価が30~250mgKOH/gの範囲内である化合物(B)100重量部に対し、好ましくは0.05~30重量部の範囲で添加され、より好ましくは、5~20重量部である。化合物(B)100重量部に対する光重合開始剤(D)の添加量を5重量部以上とすることにより、特に露光部の硬化密度が増加し、現像後の残膜率を高くすることができる。また、化合物(B)100重量部に対する光重合開始剤(D)の添加量を20重量部以下とすることで、特に光重合開始剤(D)による塗布膜上部での過剰な光吸収を抑制し、導電パターンが逆テーパー形状となり基材との接着性が低下することを抑制することができる。
複合粒子(A)のアスペクト比はSEMもしくはTEM画像から100個の粒子のアスペクト比を求め、その平均値とした。
PETフィルム上に導電ペーストを乾燥厚みが10μmになるように塗布、90℃の乾燥オーブンで5分間乾燥し、一定のラインアンドスペース(L/S)で配列する直線群を1つのユニットとし、L/Sの値が異なる9種類のユニットを有する透光パターンを有するフォトマスクを介して露光、現像、そして130℃で1時間キュアすることによって導電パターンを得た。各ユニットのL/Sの値は500/500、250/250、100/100、50/50、40/40、30/30、25/25、20/20、15/15とした(それぞれライン幅(μm)/間隔(μm)を表す)。パターンを光学顕微鏡により観察し、パターン間に残渣がなく、かつパターン剥がれのない最小のL/Sの値を持つパターンを確認し、この最小のL/Sの値を現像可能なL/Sとした。
PETフィルム上に導電ペーストを乾燥厚みが10μmになるように塗布、90℃の乾燥オーブンで10分間乾燥し、図1に示すパターンの透光部Aを有するフォトマスクを介して露光し、現像そして130℃で1時間乾燥オーブンでキュアすることによって比抵抗率測定用導電性パターンを得た。導電性パターンのライン幅は0.400mm、ライン長さは80mmである。得られたパターンの端部を表面抵抗計でつなぎ、表面抵抗値を測定し、下記の計算式に当てはめて比抵抗率を算出した。なお膜厚の測定は触針式段差計“サーフコム(登録商標)1400”(商品名、(株)東京精密製)を用いて行った。膜厚の測定はランダムに3箇所の位置にて測り、その3点の平均値を膜厚とした。測長は1mm、走査速度は0.3mm/sとした。線幅はパターンを光学顕微鏡でランダムに3箇所の位置を観察し、画像データを解析して得られた3点の平均値を線幅とした。
比抵抗率=表面抵抗値×膜厚×線幅/ライン長
<屈曲性の評価方法>
図2は屈曲性試験に用いたサンプルを模式的に示したものである。縦10mm、横100mmの長方形のPETフィルム(厚み40μm)上に導電ペーストを乾燥厚みが10μmになるように塗布し、90℃の乾燥オーブンで10分間乾燥し、図1に示すパターンの透光部Aを有するフォトマスクを、透光部がサンプル中央になるように配置して露光し、現像、130℃で1時間乾燥オーブンでキュアして導電パターンを形成し、テスターを用いて抵抗値を測定した。その後導電パターンが内側、外側と交互になるように曲げてサンプル短辺Bとサンプル短辺Cを接触させ、元に戻す屈曲動作を100回繰り返した後、再度テスターで抵抗値を測定した。その結果抵抗値の変化量が20%以下であること、且つ導電パターンにクラック、剥がれ、断線などがないものを○とし、そうでないものを×とした。
PETフィルムにITOが全面スパッタされた透明導電フィルム上に導電ペーストを乾燥厚みが10μmになるように塗布し、90℃の乾燥オーブンで10分間乾燥し、図3に示すパターンの透光部Aを有するフォトマスクを介して露光し、現像そして130℃で1時間乾燥オーブンでキュアすることによってITOとの接続信頼性評価サンプルを得た。導電性パターンのライン幅は100μm、ライン間は5mm、端子部は直径2mmの円形である。得られたサンプルの端子部をテスターでつなぎ、初期抵抗を測定した後、85℃、85%RHの恒温恒湿槽“LU-113”(商品名、エスペック(株))に500h投入した。その後、取り出したサンプルの端子部を再度テスターでつなぎ抵抗値を測定し、下記式を用いて抵抗変化率を算出し、1.3以下のものを○、1.3より大きいものは×とした。
抵抗変化率=抵抗値(500h後)/初期抵抗値
実施例、比較例で用いた材料は以下の通りである。
・無機粒子表面にアンチモン含有化合物が被覆されている粒子(A)
ET-300W(商品名、石原産業株式会社製、酸化チタンからなる芯材をアンチモンドープ酸化スズで被覆した複合粒子、アスペクト比1.1、体積平均粒子径0.03~0.06μm)
ET-500W(商品名、石原産業株式会社製、酸化チタンからなる芯材をアンチモンドープ酸化スズで被覆した複合粒子、アスペクト比1.1、体積平均粒子径0.2~0.3μm)
FT-1000(商品名、石原産業株式会社製、酸化チタンからなる芯材をアンチモンドープ酸化スズで被覆した複合粒子、アスペクト比12.9、体積平均粒子径0.18μm)
パストラン(登録商標)4410(商品名、三井金属鉱業株式会社製、硫酸バリウムからなる芯材をアンチモンドープ酸化スズで被覆した複合粒子、アスペクト比1.2、体積平均粒子径0.1μm)
・酸価が30~250mgKOH/gの範囲内である化合物(B)
KAYARAD(登録商標) ASP-010(商品名、日本化薬株式会社製、不飽和二重結合を有さないアクリル系共重合物、酸価46mgKOH/g、ガラス転移温度60℃(DSC測定))
Curalite(登録商標) 2300(商品名、Perstorp社製、ポリエステル系樹脂、酸価229mgKOH/g、ガラス転移温度45℃(DSC測定))
(合成例1)酸価が30~250mgKOH/gの範囲内である化合物 B-1
エチルアクリレート(EA)/メタクリル酸2-エチルヘキシル(2-EHMA)/スチレン(St)/アクリル酸(AA)の共重合体(共重合比率:20重量部/40重量部/20重量部/15重量部)にグリシジルメタクリレート(GMA)を5重量部付加反応させたもの
窒素雰囲気の反応容器中にジエチレングリコールモノエチルエーテルアセテート150gを仕込みオイルバスを用いて80℃まで昇温した。これに、エチルアクリレート20g、メタクリル酸2-エチルヘキシル40g、スチレン20g、アクリル酸15g、2,2’-アゾビスイソブチロニトリル0.8gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を1時間かけて滴下した。滴下終了後、さらに6時間重合反応を行った。その後、ハイドロキノンモノメチルエーテル1gを添加して重合反応を停止した。引き続きグリシジルメタクリレート5g、トリエチルベンジルアンモニウムクロライド1gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を0.5時間かけて滴下した。滴下終了後、さらに2時間付加反応を行った。得られた反応溶液をメタノールで精製することで未反応不純物を除去し、さらに24時間真空乾燥することで化合物B-1を得た。得られた化合物B-1の酸価は103mgKOH/g、式(1)より求めたガラス転移温度は21.7℃であった。
(合成例2)酸価が30~250mgKOH/gの範囲である化合物 B-2
エチレンオキサイド変性ビスフェノールAジアクリレートFA-324A(製品名、日立化成工業株式会社製)/EA/AAの共重合体(共重合比率:50重量部/10重量部/15重量部)にグリシジルメタクリレート(GMA)を5重量部付加反応させたもの
窒素雰囲気の反応容器中にジエチレングリコールモノエチルエーテルアセテート150gを仕込みオイルバスを用いて80℃まで昇温した。これに、エチレンオキサイド変性ビスフェノールAジアクリレートFA-324Aを50g、エチルアクリレート20g、アクリル酸15g、2,2’-アゾビスイソブチロニトリル0.8gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を1時間かけて滴下した。滴下終了後、さらに6時間重合反応を行った。その後、ハイドロキノンモノメチルエーテル1gを添加して重合反応を停止した。引き続きグリシジルメタクリレート5g、トリエチルベンジルアンモニウムクロライド1gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を0.5時間かけて滴下した。滴下終了後、さらに2時間付加反応を行った。得られた反応溶液をメタノールで精製することで未反応不純物を除去し、さらに24時間真空乾燥することで化合物B-2を得た。得られた化合物B-2の酸価は96mgKOH/g、式(1)より求めたガラス転移温度は19.9℃であった。
(合成例3)エポキシエステル3000A(共栄社化学(株)製、分子量:476.7、ビスフェノールA骨格を有する)/メタクリル酸2-エチルヘキシル(2-EHMA)/スチレン(St)/アクリル酸(AA)の共重合体(共重合比率:20重量部/40重量部/20重量部/15重量部)にグリシジルメタクリレート(GMA)を5重量部付加反応させたもの
窒素雰囲気の反応容器中にジエチレングリコールモノエチルエーテルアセテート150gを仕込みオイルバスを用いて80℃まで昇温した。これに、エポキシエステル3000A20g、メタクリル酸2-エチルヘキシル40g、スチレン20g、アクリル酸15g、2,2’-アゾビスイソブチロニトリル0.8gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を1時間かけて滴下した。滴下終了後、さらに6時間重合反応を行った。その後、ハイドロキノンモノメチルエーテル1gを添加して重合反応を停止した。引き続きグリシジルメタクリレート5g、トリエチルベンジルアンモニウムクロライド1gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を0.5時間かけて滴下した。滴下終了後、さらに2時間付加反応を行った。得られた反応溶液をメタノールで精製することで未反応不純物を除去し、さらに24時間真空乾燥することで化合物B-3を得た。得られた化合物B-3の酸価は98mgKOH/g、DSC測定から得られたガラス転移温度は43.2℃であった。
(合成例4)エポキシエステル70PA(共栄社化学(株)製、分子量:332.4、脂肪鎖型エポキシアクリレート)/メタクリル酸2-エチルヘキシル(2-EHMA)/スチレン(St)/アクリル酸(AA)の共重合体(共重合比率:20重量部/40重量部/20重量部/15重量部)にグリシジルメタクリレート(GMA)を5重量部付加反応させたもの
窒素雰囲気の反応容器中にジエチレングリコールモノエチルエーテルアセテート150gを仕込みオイルバスを用いて80℃まで昇温した。これに、エポキシエステル70PA20g、メタクリル酸2-エチルヘキシル40g、スチレン20g、アクリル酸15g、2,2’-アゾビスイソブチロニトリル0.8gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を1時間かけて滴下した。滴下終了後、さらに6時間重合反応を行った。その後、ハイドロキノンモノメチルエーテル1gを添加して重合反応を停止した。引き続きグリシジルメタクリレート5g、トリエチルベンジルアンモニウムクロライド1gおよびジエチレングリコールモノエチルエーテルアセテート10gからなる混合物を0.5時間かけて滴下した。滴下終了後、さらに2時間付加反応を行った。得られた反応溶液をメタノールで精製することで未反応不純物を除去し、さらに24時間真空乾燥することで化合物B-4を得た。得られた化合物B-4の酸価は96mgKOH/g、DSC測定から得られたガラス転移温度は23.5℃であった。
(合成例5)反応容器にエポキシエステル3000A(共栄社化学(株)製、分子量:476.7、ビスフェノールA骨格を有する)200g、反応用溶媒としてジエチレングリコールモノエチルエーテルアセテート500g、熱重合禁止剤として2-メチルハイドロキノンを0.5g、カルボキシル基を有するジオール化合物としてジヒドロキシプロピオン酸(分子量:106.1)75g加え、45℃に昇温させた。この溶液にヘキサメチレンジイソシアネート(分子量:168.2)84.1g加え、反応温度が50℃を超えないように徐々に滴下した。滴下終了後、温度を80℃に上昇させ、赤外吸収スペクトル測定法により、2250cm-1付近の吸収がなくなるまで6時間反応させた。この溶液に分子中にグリシジルメタクリレート(分子量:142.2)165g添加後、95℃に昇温し、6時間反応させることで化合物B-5を得た。得られた化合物B-5の51.2重量%の樹脂溶液を得た。得られた化合物B-5の酸価は89mgKOH/g、DSC測定から得られたガラス転移温度は27.2℃であった。
・導電性フィラー(C)
表1に記載の材料、体積平均粒子径のものを用いた。なお、体積平均粒子径は以下の方法により求めた。
・光重合開始剤(D)
IRGACURE(登録商標)369(商品名、チバジャパン株式会社製)
<体積平均粒子径の測定>
HORIBA社製動的光散乱式粒度分布計により、導電性フィラー(C)の体積平均粒子径を測定した。
・モノマー:ライトアクリレートBP-4EA(共栄社化学株式会社製)
・溶剤:ジエチレングリコールモノエチルエーテルアセテート(東京化成工業株式会社製)
・無機粒子を含まないアンチモン含有化合物および導電性酸化スズ粒子
SN-100P(商品名、石原産業株式会社製)
FS-10P(商品名、石原産業株式会社製)
T-1(商品名、三菱マテリアル電子化成株式会社製)
(実施例1)
100mLクリーンボトルに化合物B-1を10.0g、光重合開始剤IRGACURE(登録商標)369(チバジャパン株式会社製)を0.50g、ジエチレングリコールモノエチルエーテルアセテートを5.0gいれ、“あわとり錬太郎”(登録商標;商品名、ARE-310、株式会社シンキー社製)で混合し、樹脂溶液15.5g(固形分67.7重量%)を得た。
表1に示す組成の導電ペーストを実施例1と同様の方法で製造し、評価結果を表2に示した。
表1に示す組成の導電ペーストを実施例1と同様の方法で製造し、評価結果を表2に示した。
B、C サンプル短辺
D 導電パターン
E PETフィルム
Claims (12)
- 無機材料からなる芯材表面をアンチモン含有化合物で被覆してなる複合粒子(A)、酸価が30~250mgKOH/gの範囲である化合物(B)、導電性フィラー(C)を含むことを特徴とする導電ペースト。
- 前記化合物(B)が不飽和二重結合を有することを特徴とする請求項1に記載の導電ペースト。
- 光重合開始剤(D)を含むことを特徴とする請求項1または2記載の導電ペースト。
- 前記アンチモン含有化合物がアンチモンドープ酸化スズであることを特徴とする請求項1~3のいずれかに記載の導電ペースト。
- 前記複合粒子(A)の芯材が、酸化チタン、硫酸バリウム、酸化アルミニウム、二酸化ケイ素、酸化鉄、酸化ニッケル、酸化銅、カーボン、金、白金、タングステン及びチタンからなる群から選ばれる金属化合物からなることを特徴とする請求項1~4のいずれかに記載の導電ペースト。
- 前記複合粒子(A)の芯材が、酸化チタン、硫酸バリウム、二酸化ケイ素及びカーボンからなる群から選ばれる金属化合物からなることを特徴とする請求項1~5のいずれかに記載の導電ペースト。
- 前記複合粒子(A)のアスペクト比が1.5~50であることを特徴とする請求項1~6のいずれかに記載の導電ペースト。
- 前記複合粒子(A)のアスペクト比が10~50であることを特徴とする請求項1~7のいずれかに記載の導電ペースト。
- 前記複合粒子(A)を0.5~2重量%および導電性フィラー(C)を70~90重量%含むことを特徴とする請求項1~8のいずれかに記載の導電ペースト。
- 前記化合物(B)のガラス転移温度が-10~60℃の範囲内であることを特徴とする請求項1~9のいずれかに記載の導電ペースト。
- 請求項1~10のいずれかに記載の導電ペーストを基板上に塗布し、露光し、現像した後に100℃以上300℃以下の温度でキュアすることを特徴とする導電パターンの製造方法。
- 請求項11記載の導電パターンと、ITOとが接触した周囲配線を備えることを特徴とするタッチパネル。
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| US14/372,566 US20140360763A1 (en) | 2012-01-19 | 2013-01-10 | Conductive paste and method for producing conductive pattern |
| JP2013509328A JP5967079B2 (ja) | 2012-01-19 | 2013-01-10 | 導電ペーストおよび導電パターンの製造方法 |
| CN201380005985.0A CN104040640B (zh) | 2012-01-19 | 2013-01-10 | 导电浆料和导电图案的制造方法 |
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| JP2018162387A (ja) * | 2017-03-27 | 2018-10-18 | オート化学工業株式会社 | 硬化性組成物 |
| JP2022535260A (ja) * | 2019-06-03 | 2022-08-05 | バリュー アンド インテレクチュアル プロパティーズ マネージメント ゲーエムベーハー | 可撓な基材上に電気部品を製造するための方法および装置 |
| JP7445682B2 (ja) | 2019-06-03 | 2024-03-07 | バリュー アンド インテレクチュアル プロパティーズ マネージメント ゲーエムベーハー | 可撓な基材上に電気部品を製造するための方法および装置 |
Also Published As
| Publication number | Publication date |
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| US20140360763A1 (en) | 2014-12-11 |
| CN104040640B (zh) | 2017-03-29 |
| JP5967079B2 (ja) | 2016-08-10 |
| TWI597740B (zh) | 2017-09-01 |
| CN104040640A (zh) | 2014-09-10 |
| JPWO2013108696A1 (ja) | 2015-05-11 |
| KR20140115316A (ko) | 2014-09-30 |
| TW201340123A (zh) | 2013-10-01 |
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