WO2015068499A1 - プリント配線板用硬化型組成物、これを用いた硬化塗膜及びプリント配線板 - Google Patents
プリント配線板用硬化型組成物、これを用いた硬化塗膜及びプリント配線板 Download PDFInfo
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- WO2015068499A1 WO2015068499A1 PCT/JP2014/076102 JP2014076102W WO2015068499A1 WO 2015068499 A1 WO2015068499 A1 WO 2015068499A1 JP 2014076102 W JP2014076102 W JP 2014076102W WO 2015068499 A1 WO2015068499 A1 WO 2015068499A1
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- printed wiring
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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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
- C08F20/12—Esters of monohydric alcohols or phenols
- C08F20/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F20/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
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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
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
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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
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment 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
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/066—Copolymers with monomers not covered by C09D133/06 containing -OH groups
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
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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
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0373—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement containing additives, e.g. fillers
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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
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/285—Permanent coating compositions
- H05K3/287—Photosensitive compositions
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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
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3452—Solder masks
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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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
- H05K2201/0209—Inorganic, non-metallic particles
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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
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0756—Uses of liquids, e.g. rinsing, coating, dissolving
- H05K2203/0759—Forming a polymer layer by liquid coating, e.g. a non-metallic protective coating or an organic bonding layer
Definitions
- the present invention relates to a curable composition for a printed wiring board, in particular, an ultraviolet curable composition used in an ink jet system, a coating film for printed wiring board of at least one of resist and marking using the composition, and
- the present invention relates to a printed wiring board having a pattern obtained by use.
- compositions for printed wiring boards such as solder resist
- a method of adding a filler for the purpose of improving the physical strength of the coating film is generally used, but it is compatible with inkjet and spin coating methods.
- the filler settles out during long-term storage, so that changes in printability and deterioration in coating film characteristics have been problems.
- JP-A-5-7079 Japanese Patent Laid-Open No. 5-7080 JP 5-7081
- the present invention has been made to solve the above-described problems of the prior art, and its main purpose is that the coating film has high physical strength such as solder heat resistance and pencil hardness. It is an object of the present invention to provide a curable composition for a printed wiring board in which sedimentation of contained components hardly occurs during long-term storage even when the viscosity is low enough to cope with the law.
- a curable composition for a printed wiring board comprising a specific filler, a (meth) acrylate compound having a hydroxyl group, and a photopolymerization initiator. It was issued.
- the curable composition for printed wiring boards of the present invention comprises (A) a filler having a specific gravity of 3 or less, (B) a (meth) acrylate compound having a hydroxyl group, and (C) a photopolymerization initiator. It is characterized by.
- the filler (A) having a specific gravity of 3 or less is preferably an inorganic filler.
- the maximum particle size of the particles contained in the composition is preferably 0.1 to 5 ⁇ m or less.
- the curable composition for printed wiring boards of the present invention further contains a bifunctional (meth) acrylate compound.
- the viscosity of the bifunctional (meth) acrylate compound at 25 ° C. is preferably 5 to 50 mPa ⁇ s.
- the curable composition for a printed wiring board of the present invention further includes a thermosetting component.
- the curable composition for printed wiring boards of the present invention preferably has a viscosity at 50 ° C. of 5 to 50 mPa ⁇ s.
- the cured coating film of the present invention is obtained by irradiating one of the above-mentioned curable compositions for printed wiring boards with light.
- the printed wiring board of the present invention is characterized by having a pattern cured coating film obtained by printing one of the above-mentioned curable compositions for a printed wiring board on a substrate and irradiating it with light. .
- the printed wiring board according to the present invention is characterized in that any one of the above-mentioned curable compositions for printed wiring boards is printed on a substrate by an ink jet printing method and has a pattern cured coating film obtained by irradiating it with light. To do.
- the printed wiring board of the present invention is characterized in that the substrate is a plastic substrate.
- the physical strength of the coating film such as solder heat resistance and pencil hardness is high, and even when the viscosity is low enough to be compatible with the ink jet printing method, spin coating method, etc. It becomes possible to provide a curable composition for a printed wiring board which does not easily settle.
- the curable composition of the present invention is excellent in adhesion to a substrate or the like, and can provide a cured coating film excellent in various properties such as hardness and chemical resistance.
- the curable composition of the present invention can be suitably used as an inkjet composition.
- the curable composition for printed wiring boards of the present invention (hereinafter also referred to as curable composition) comprises (A) a filler having a specific gravity of 3 or less (component A), and (B) a (meth) acrylate compound having a hydroxyl group (component). B) and (C) a photopolymerization initiator (component C).
- (meth) acrylate is a term generically referring to acrylate, methacrylate and a mixture thereof, and the same applies to other similar expressions.
- (A) Filler with specific gravity of 3 or less As the filler having a specific gravity of 3 or less, a conventionally known filler can be used. As a filler of a component (A), although an inorganic filler is preferable, an organic filler may be sufficient. The filler of component (A) preferably has a specific gravity of 1 to 3.
- fillers having a specific gravity of 3 or less include aluminum hydroxide (specific gravity: 2.42), magnesium hydroxide (specific gravity: 2.3 to 2.4), talc (specific gravity: 2.7 to 2.8), silica (specific gravity: 2.2), Magnesium carbonate (specific gravity: 2.98), calcium carbonate (specific gravity: 2.4-2.7), hydrotalcite (2.03-2.09), calcium hydroxide (2.21), sepiolite (2.0-2.3), calcium sulfate (2.96, anhydride), (2.36, dihydrate), kaolin (2.6), mica (2.8-3.0), magnesium sulfate (2.65), carbon black (1.8-2.1), fly ash (1.9-2.1), wollastonite (2.9-3.0) ) And the like. Due to the blending of a filler having a specific gravity of 3 or less, the occurrence of settling in the curable composition for printed wiring boards can be prevented, and the coating strength such as solder heat resistance and pencil hardness can be improved.
- the filler having a specific gravity of more than 3 is not substantially contained in the curable composition of the present invention, but does not impair the characteristics of the curable composition of the present invention and the purpose of the invention. However, it is not excluded that a filler having a specific gravity of more than 3 is included. As the filler having a specific gravity of more than 3, known and commonly used fillers can be used.
- fillers with a specific gravity exceeding 3 include barium sulfate (4.5), titanium oxide (4), barium titanate (6.02), alumina (about 4), boehmite (3.04), zinc oxide ( 5.6), magnesium oxide (3.65), calcium oxide (3.35), potassium titanate (3.5), copper (8.74), iron (7.87), and the like.
- the blending amount of the filler having a specific gravity of 3 or less is preferably 5 to 30 parts by mass, more preferably 10 to 30 parts by mass in 100 parts by mass of the curable composition of the present invention. If it is 5 parts by mass or more, an improvement in physical strength can be expected. On the other hand, if it is 30 parts by mass or less, a decrease in (inkjet) printability due to an increase in viscosity or an increase in thixotropy can be suppressed.
- the maximum particle size of the particles contained in the curable composition of the present invention is preferably 0.1 to 5 ⁇ m or less, and more preferably 0.1 to 1 ⁇ m. If the maximum particle size is 0.1 ⁇ m or more, the cohesive force of the particles will not be too high, and if it is 5 ⁇ m or less, the possibility of problems such as nozzle clogging during ink jet printing is reduced, which is preferable. .
- the maximum particle size of the particles contained in the composition can be measured with a particle size distribution meter, and the D100 value is taken as the maximum particle size.
- (B) (Meth) acrylate compound having a hydroxyl group As the (B) hydroxyl group-containing (meth) acrylate compound, a low molecular weight material such as a monomer or an oligomer is used. Specifically, a material having a molecular weight in the range of 100 to 1000, preferably in the range of a molecular weight of 110 to 700 is used. .
- (B) hydroxyl group-containing (meth) acrylate compound examples include 2-hydroxy-3-acryloyloxypropyl (meth) acrylate, 2-hydroxy-3-phenoxyethyl (meth) acrylate, and 1,4-cyclohexane.
- Dimethanol mono (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol monohydroxypenta Examples include meth) acrylate and 2-hydroxypropyl (meth) acrylate.
- 2-hydroxy-3-acryloyloxypropyl acrylate 2-hydroxy-3-phenoxyethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 1,4-cyclohexanedimethanol Monoacrylate is preferably used.
- a monofunctional (meth) acrylate compound is preferably used because of easy viscosity adjustment.
- the amount of the (meth) acrylate compound having a hydroxyl group is preferably 5 to 50 parts by mass, more preferably 10 to 30 parts by mass in 100 parts by mass of the curable composition of the present invention.
- the compounding quantity of the (meth) acrylate which has a hydroxyl group is 5 mass parts or more, the adhesiveness which is the characteristics of the composition of this invention becomes more favorable.
- the blending amount is 50 parts by mass or less, a decrease in ink compatibility can be suppressed.
- the curable composition of the present invention has a low viscosity due to the combination of the component (A) and the component (B), sedimentation of the contained components hardly occurs during long-term storage, and Excellent adhesion to both plastic substrates and conductor circuit metals, and exhibits excellent substrate protection performance as resist inks (etching resist ink, solder resist ink, plating resist ink) for printed wiring boards, for example. . Moreover, even if it is a low exposure amount, it exhibits excellent cured coating film characteristics.
- (C) Photopolymerization initiator (C) It does not specifically limit as a photoinitiator,
- a photoradical polymerization initiator can be used.
- this radical photopolymerization initiator any compound can be used as long as it is a compound that generates radicals by light, laser, electron beam or the like and initiates radical polymerization reaction.
- Examples of the photopolymerization initiator include benzoin and benzoin alkyl ethers such as benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin isopropyl ether; 2-hydroxy-2-methyl-1-phenyl-propane-1- Alkylphenones such as ON; acetophenones such as acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone; 2-methyl-1- [4 Amino such as-(methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, N, N-dimethylaminoacetophenone Acetophenones; 2-methyl Anthraquinones such as nthraquinone, 2-ethylanth
- Ketals such as acetophenone dimethyl ketal and benzyl dimethyl ketal; 2,4,5-triarylimidazole dimer; Riboflavin tetrabutyrate; 2-mercaptobenzimidazole, 2-mercaptobenzoxazole, 2-mercaptobenzothiazole Thiol compounds such as 2,4,6-tris-s-triazine, 2,2,2-tribromoethanol, tribromomethylphenylsulfone and the like organic halogen compounds; , Benzophenones such as 4,4'-bisdiethylaminobenzophenone or xanthones; acylphosphine such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide Finoxides; bis (cyclopentadienyl) -di-phenyl-titanium, bis
- photopolymerization initiators can be used alone or as a mixture of two or more thereof, and further, N, N-dimethylaminobenzoic acid ethyl ester, N, N-dimethylaminobenzoic acid isoamyl ester, pentyl-4- Photoinitiator aids such as tertiary amines such as dimethylaminobenzoate, triethylamine, triethanolamine can be added.
- the blending ratio of the photopolymerization initiator is preferably in the range of 0.5 to 10 parts by mass in 100 parts by mass of the curable composition of the present invention.
- the curable composition for printed wiring boards of the present invention preferably further contains a bifunctional (meth) acrylate compound (excluding those having a hydroxyl group).
- a bifunctional (meth) acrylate compound excluding those having a hydroxyl group
- the compatibility of each component in the curable composition for printed wiring boards can be further improved.
- bifunctional (meth) acrylate examples include 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,9-nonanediol diacrylate, 1,10 -Diacrylates of diols such as decanediol diacrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, Polypropylene glycol diacrylate, neopentyl glycol diacrylate, neopentyl glycol with ethylene oxide and propylene oxide Diols of diols obtained by adding at least one of the above, diacrylates of glycols such as caprolactone modified hydroxypivalic acid neopentyl glycol diacrylate, bisphenol A
- diacrylates of diols having an alkyl chain having 4 to 12 carbon atoms particularly 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,9- Nonanediol diacrylate and 1,10-decanediol diacrylate are preferred.
- the blending amount of these bifunctional acrylate compounds is preferably 20 to 80 parts by mass, more preferably 40 to 70 parts by mass in 100 parts by mass of the curable composition of the present invention.
- the blending amount of the bifunctional (meth) acrylate is 20 parts by mass or more, the ink compatibility is good.
- the blending amount is 80 parts by mass or less, the ink adhesion is good.
- the viscosity of the bifunctional (meth) acrylate compound at 25 ° C. is preferably 5 to 50 mPa ⁇ s, particularly 5 to 30 mPa ⁇ s. In this viscosity range, the handleability as a diluent of a bifunctional (meth) acrylate compound becomes good, and each component can be mixed uniformly. As a result, it can be expected that the entire surface of the coating film adheres uniformly to the substrate.
- thermosetting component can be added to the curable composition of the present invention. It can be expected that adhesion and heat resistance are improved by adding a thermosetting component.
- thermosetting components used in the present invention include amino resins such as melamine resins, benzoguanamine resins, melamine derivatives, and benzoguanamine derivatives, blocked isocyanate compounds, cyclocarbonate compounds, thermosetting components having a cyclic (thio) ether group, bismaleimide, Known thermosetting resins such as carbodiimide resins can be used. Particularly preferred are blocked isocyanate compounds from the viewpoint of excellent storage stability.
- thermosetting component having a plurality of cyclic (thio) ether groups in the molecule is a compound having any one of the three, four or five-membered cyclic (thio) ether groups in the molecule or a plurality of two types of groups.
- a compound having a plurality of epoxy groups in the molecule that is, a polyfunctional epoxy compound, a compound having a plurality of oxetanyl groups in the molecule, that is, a polyfunctional oxetane compound, a compound having a plurality of thioether groups in the molecule, That is, episulfide resin etc. are mentioned.
- polyfunctional epoxy compound examples include epoxidized vegetable oils such as Adekasizer O-130P, Adekasizer O-180A, Adekasizer D-32, and Adekasizer D-55 manufactured by ADEKA; jER828, jER834 manufactured by Mitsubishi Chemical Corporation; jER1001, jER1004, Daicel EHPE3150, DIC Epicron 840, Epicron 850, Epicron 1050, Epicron 2055, Toto Kasei Epototo YD-011, YD-013, YD-127, YD-128, Dow Chemical D. E. R. 317, D.E. E. R. 331, D.D. E. R. 661, D.E. E. R.
- E. R. 330 Sumi-epoxy ESA-011, ESA-014, ELA-115, ELA-128 manufactured by Sumitomo Chemical Co., Ltd.
- E. R. 330 A.I. E. R. 331, A.I. E. R. 661, A.I. E. R.
- Brominated epoxy resins such as 714 (both trade names); jER152 and jER154 manufactured by Mitsubishi Chemical Corporation, and D.C. E. N. 431, D.D. E. N. 438, Epicron N-730, Epicron N-770, Epicron N-865 manufactured by DIC, Epototo YDCN-701, YDCN-704 manufactured by Tohto Kasei Co., Ltd. EPPN-201, EOCN-1025, EOCN manufactured by Nippon Kayaku Co., Ltd. -1020, EOCN-104S, RE-306, Sumitomo Epoxy ESCN-195X, ESCN-220, manufactured by Sumitomo Chemical Co., Ltd. E. R.
- Novolak type epoxy resins such as ECN-235 and ECN-299 (both trade names); biphenol novolak type epoxy resins such as NC-3000 and NC-3100 manufactured by Nippon Kayaku; Epicron 830 manufactured by DIC, Mitsubishi Chemical JER807 manufactured by Toto Kasei Co., Ltd. Etototo YDF-170, YDF-175, YDF-2004, etc. (all trade names) bisphenol F type epoxy resin; Toto Kasei Co., Ltd.
- Epototo ST-2004, ST-2007, ST- Hydrogenated bisphenol A type epoxy resin such as 3000 (trade name); jER604 manufactured by Mitsubishi Chemical Co., Ltd., Epotot YH-434 manufactured by Tohto Kasei Co., Ltd., Sumi-epoxy ELM-120 manufactured by Sumitomo Chemical Co., Ltd. ) Glycidylamine type epoxy resin; hydantoin type epoxy resin; manufactured by Daicel Alicyclic epoxy resins Rokisaido 2021 etc. (all trade names); manufactured by Mitsubishi Chemical Corporation YL-933, Dow Chemical Co. of T. E. N. , EPPN-501, EPPN-502, etc.
- epoxy resin having a dicyclopentadiene skeleton such as HP-7200 and HP-7200H manufactured by DIC
- glycidyl methacrylate copolymer epoxy resin such as CP-50S and CP-50M manufactured by NOF Corporation
- the present invention is not limited to these.
- These epoxy resins can be used alone or in combination of two or more.
- novolak-type epoxy resins bixylenol-type epoxy resins, biphenol-type epoxy resins, biphenol novolac-type epoxy resins, naphthalene-type epoxy resins or mixtures thereof are particularly preferable.
- polyfunctional oxetane compound examples include bis [(3-methyl-3-oxetanylmethoxy) methyl] ether, bis [(3-ethyl-3-oxetanylmethoxy) methyl] ether, 1,4-bis [(3- Methyl-3-oxetanylmethoxy) methyl] benzene, 1,4-bis [(3-ethyl-3-oxetanylmethoxy) methyl] benzene, (3-methyl-3-oxetanyl) methyl acrylate, (3-ethyl-3- In addition to polyfunctional oxetanes such as oxetanyl) methyl acrylate, (3-methyl-3-oxetanyl) methyl methacrylate, (3-ethyl-3-oxetanyl) methyl methacrylate and oligomers or copolymers thereof, oxetane alcohol and novolak resin , Poly (p-hydroxy
- Examples of the compound having a plurality of cyclic thioether groups in the molecule include bisphenol A type episulfide resin YL7000 manufactured by Mitsubishi Chemical Corporation. Moreover, episulfide resin etc. which replaced the oxygen atom of the epoxy group of the novolak-type epoxy resin with the sulfur atom using the same synthesis method can be used.
- amino resins such as melamine derivatives and benzoguanamine derivatives
- amino resins include methylol melamine compounds, methylol benzoguanamine compounds, methylol glycoluril compounds, and methylol urea compounds.
- the alkoxymethylated melamine compound, the alkoxymethylated benzoguanamine compound, the alkoxymethylated glycoluril compound and the alkoxymethylated urea compound have the methylol group of the respective methylolmelamine compound, methylolbenzoguanamine compound, methylolglycoluril compound and methylolurea compound. Obtained by conversion to an alkoxymethyl group.
- the type of the alkoxymethyl group is not particularly limited and can be, for example, a methoxymethyl group, an ethoxymethyl group, a propoxymethyl group, a butoxymethyl group, or the like.
- a melamine derivative having a formalin concentration which is friendly to the human body and the environment is preferably 0.2% or less.
- thermosetting component examples include Cymel 300, 301, 303, 370, 325, 327, 701, 266, 267, 238, 1141, 272, 202, 1156. 1158, 1123, 1170, 1174, UFR65, 300 (all manufactured by Mitsui Cyanamid), Nicalak Mx-750, Mx-032, Mx-270, Mx-280, Mx- 290, Mx-706, Mx-708, Mx-40, Mx-31, Ms-11, Mw-30, Mw-30HM, Mw-390, Mw-100LM, Mw- 750LM (all manufactured by Sanwa Chemical Co., Ltd.).
- Such a thermosetting component may be used individually by 1 type, and may be used in combination of 2 or more type.
- An isocyanate compound and a blocked isocyanate compound are compounds having a plurality of isocyanate groups or blocked isocyanate groups in one molecule.
- Examples of such a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule include polyisocyanate compounds or blocked isocyanate compounds.
- the blocked isocyanate group is a group in which the isocyanate group is protected by the reaction with the blocking agent and temporarily inactivated, and the blocking agent is dissociated when heated to a predetermined temperature. Produces. It was confirmed that the curability and toughness of the resulting cured product were improved by adding the polyisocyanate compound or the blocked isocyanate compound.
- polyisocyanate compound for example, aromatic polyisocyanate, aliphatic polyisocyanate or alicyclic polyisocyanate is used.
- aromatic polyisocyanate include, for example, 4,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, naphthalene-1,5-diisocyanate, o-xylylene diisocyanate, and m-xylylene diisocyanate and 2,4-tolylene dimer.
- aliphatic polyisocyanate examples include tetramethylene diisocyanate, hexamethylene diisocyanate, methylene diisocyanate, trimethylhexamethylene diisocyanate, 4,4-methylenebis (cyclohexyl isocyanate), and isophorone diisocyanate.
- alicyclic polyisocyanate examples include bicycloheptane triisocyanate.
- adducts, burettes and isocyanurates of the above-mentioned isocyanate compounds can be used.
- the blocked isocyanate compound an addition reaction product of an isocyanate compound and an isocyanate blocking agent is used.
- an isocyanate compound which can react with a blocking agent the above-mentioned polyisocyanate compound etc. are mentioned, for example.
- isocyanate blocking agent examples include phenolic blocking agents such as phenol, cresol, xylenol, chlorophenol and ethylphenol; lactam blocking agents such as ⁇ -caprolactam, ⁇ -palerolactam, ⁇ -butyrolactam and ⁇ -propiolactam; Active methylene blocking agents such as ethyl acetoacetate and acetylacetone; methanol, ethanol, propanol, butanol, amyl alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, benzyl Ether, methyl glycolate, butyl glycolate, diacetone alcohol, Alcohol blocking agents such as methyl acid and ethyl lactate; oxime blocking agents such as formaldehyde oxime, acetaldoxime, acetoxime, methyl e
- the blocked isocyanate compound may be commercially available, for example, Sumidur BL-3175, BL-4165, BL-1100, BL-1265, Death Module TPLS-2957, TPLS-2062, TPLS-2078, TPLS-2117.
- thermosetting component is preferably 1 to 30 parts by mass in 100 parts by mass of the curable composition of the present invention.
- the blending amount is 1 part by mass or more, sufficient toughness and heat resistance of the coating film can be obtained. On the other hand, if it is 30 mass parts or less, it can suppress that storage stability falls.
- a surface tension adjuster in addition to the above components, a surfactant, a matting agent, a polyester resin for adjusting film physical properties, and a polyurethane resin as necessary.
- Vinyl resins acrylic resins, rubber resins, waxes, phthalocyanine blue, phthalocyanine green, iodin green, disazo yellow, crystal violet, titanium oxide, carbon black, naphthalene black and the like
- Known and commonly used additives such as adhesion-imparting agents such as at least one antifoaming agent and leveling agent such as silicone, fluorine and polymer, imidazole, thiazole, triazole and silane coupling agent Can be blended.
- resin can be mix
- skeleton is preferable.
- the polyene skeleton is preferably formed by polymerization using, for example, polybutadiene or isoprene, or both of them, in particular, the general formula (I), (In the formula, n represents 10 to 300.) It is preferable that it is comprised from the repeating unit represented by these. Due to the olefinic double bond of such repeating units, flexibility is imparted to the curable resist composition for printed wiring boards, the followability to the substrate is increased, and good adhesion is obtained.
- the repeating unit represented by the general formula I is preferably 50% or more, and more preferably 80% or more.
- polyene skeleton of the (meth) acrylate compound has the following general formula (II), The unit represented by may be included.
- liquid polybutadiene urethane (meth) acrylate obtained by subjecting 2-hydroxyethyl (meth) acrylate to a urethane addition reaction with a hydroxyl group of liquid polybutadiene via 2,4-tolylene diisocyanate, and maleic anhydride were added.
- Examples of commercially available products include NISSO PB TE-2000, NISSO PB TEA-1000, NISSO PB TE-3000, NISSO PB TEAI-1000 (all of which are manufactured by Nippon Soda Co., Ltd.), CN301, CN303, CN307 (SARTOMER) , BAC-15 (manufactured by Osaka Organic Chemical Industry), BAC-45 (manufactured by Osaka Organic Chemical Industry), EY RESIN BR-45UAS (manufactured by Light Chemical Industry), and the like.
- (Meth) acrylate having a polyene skeleton can be used alone or in combination.
- the curable composition for printed wiring boards of this invention can mix
- Diluents include diluent solvents, photoreactive diluents, heat reactive diluents, and the like. Of these diluents, photoreactive diluents are preferred.
- Photoreactive diluents include (meth) acrylates, vinyl ethers, ethylene derivatives, styrene, chloromethylstyrene, ⁇ -methylstyrene, maleic anhydride, dicyclopentadiene, N-vinylpyrrolidone, N-vinylformamide, xylyl
- examples thereof include compounds having an unsaturated double bond, oxetanyl group, and epoxy group, such as range oxetane, oxetane alcohol, 3-ethyl-3- (phenoxymethyl) oxetane, resorcinol diglycidyl ether, and the like.
- (meth) acrylates are preferable, and monofunctional (meth) acrylates are more preferable.
- monofunctional (meth) acrylates include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, 2- Examples include (meth) acrylates such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and glycidyl methacrylate, acryloylmorpholine, and the like.
- the blending amount of these diluents is preferably 1 to 30 parts by mass in 100 parts by mass of the curable composition of the present invention.
- the curable composition for printed wiring boards of the present invention contains a tri- or higher functional (meth) acrylate compound (excluding those having a hydroxyl group) for the purpose of improving the tackiness after UV curing of the composition. I can do it.
- Trifunctional or higher (meth) acrylate compounds include trimethylolpropane triacrylate, trimethylolmethane triacrylate, ethylene oxide modified trimethylolpropane triacrylate, propylene oxide modified trimethylolpropane triacrylate, epichlorohydrin modified trimethylolpropane triacrylate, penta Erythritol tetraacrylate, tetramethylol methane tetraacrylate, ethylene oxide modified phosphate triacrylate, propylene oxide modified phosphate triacrylate, epichlorohydrin modified glycerol triacrylate, dipentaerythritol hexaacrylate, ditrimethylolpropane tetraacrylate, or their silsesquioxanes
- Polyfunctional acrylate or methacrylate monomers corresponding to these are include ⁇ -caprolactone-modified trisacryloxyethyl isocyanurate. The blending amount of the trifunctional or
- the curable composition for a printed wiring board of the present invention having the above components is applied to a printing method such as a screen printing method, an inkjet method, a dip coating method, a flow coating method, a roll coating method, a bar coater method, or a curtain coating method.
- a printing method such as a screen printing method, an inkjet method, a dip coating method, a flow coating method, a roll coating method, a bar coater method, or a curtain coating method.
- the viscosity at 50 ° C. of the curable composition for printed wiring boards of the present invention is preferably 5 to 50 mPa ⁇ s. More preferably, it is 5 to 20 mPa ⁇ s.
- the viscosity refers to a viscosity measured at normal temperature (25 ° C.) or 50 ° C. according to JIS K2283. If the viscosity at room temperature is 150 mPa ⁇ s or less, or the viscosity at 50 ° C. is 5 to 50 mPa ⁇ s, printing by the ink jet printing method is possible.
- the curable composition for a printed wiring board of the present invention when applied as an ink for an ink jet system with the above composition, it can be printed on a flexible wiring board in a roll-to-roll system. In this case, it is possible to form a pattern cured coating film at high speed by attaching a light irradiation light source described later after passing through the ink jet printer.
- the light irradiation is performed by irradiation with ultraviolet rays or active energy, but ultraviolet rays are preferable.
- a light source for light irradiation a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a xenon lamp, a metal halide lamp, or the like is appropriate.
- electron beams, ⁇ rays, ⁇ rays, ⁇ rays, X rays, neutron rays, and the like can also be used.
- the heating temperature is, for example, 80 to 200 ° C. By setting this heating temperature range, it can be sufficiently cured.
- the heating time is, for example, 10 to 100 minutes.
- the curable composition for a printed wiring board of the present invention has excellent adhesion to a printed wiring board including a plastic substrate mainly composed of polyimide and the like and a conductor circuit provided thereon, and is a solder.
- Pattern cured coatings excellent in various properties such as heat resistance, chemical resistance, solvent resistance, pencil hardness, electroless gold plating resistance, and bendability can be formed.
- part means part by mass unless otherwise specified.
- Examples 1 to 5 and Comparative Examples 1 and 2 The components shown in Table 1 were blended in the proportions (unit: part) shown in the table, and premixed with a stirrer to prepare a curable composition.
- Pencil hardness (surface hardness) evaluation The pencil hardness of the cured coating film obtained on the surface and the surface was measured according to JIS K 5600-5-4.
- the flexible copper-clad laminate was coated on the substrate using a piezo-type inkjet printer so that the film thickness was 15 ⁇ m by inkjet printing. At this time, UV temporary curing was performed with a high-pressure mercury lamp attached to the inkjet head immediately after printing. Thereafter, curing was performed by heating at 150 ° C. for 1 hour to obtain a test piece.
- MIT test condition load 500 gf Angle: Angle facing 135 ° Speed: 175 times / min Tip: R 0.38 mm cylinder Evaluation criteria ⁇ : 50 times or more x: Less than 50 times
- Electroless plating resistance 5 Using a commercially available electroless nickel plating bath and electroless gold plating bath, under conditions of nickel 0.5 ⁇ m and gold 0.03 ⁇ m. The cured coating film obtained in 1 was plated and the surface state of the cured coating film was observed. Judgment criteria are as follows. Evaluation criteria ⁇ : No change is observed. X: Significant whitening or clouding occurred.
- the curable compositions for printed wiring boards of Examples 1 to 5 according to the present invention are settled after standing for 1 month, dry to touch after UV curing, adhesion to polyimide, Good results were exhibited in all of adhesion to copper, pencil hardness, bendability, solvent resistance, chemical resistance, solder heat resistance, and electroless gold plating resistance.
- Comparative Example 1 using a filler having a specific gravity exceeding 3 instead of Component A of the present invention, sedimentation was confirmed after standing for 1 month. Further, both Comparative Example 1 and Comparative Example 2 lacking Component A of the present invention have poor pencil hardness, solvent resistance, chemical resistance, solder heat resistance, and electroless gold plating resistance, and sufficient characteristics are not obtained. It was confirmed.
- the curable composition for printed wiring boards of the present invention is a fine composition excellent in various properties such as solder heat resistance, chemical resistance, pencil hardness, and electroless gold plating required as a solder resist.
- a pattern can be formed.
- the viscosity must be low to enable jetting.
- low-viscosity photocurable compositions are said to have poor adhesion and heat resistance, but the composition is low-viscosity, but it is a solder resist based on the inkjet method of printed wiring boards. It can also be suitably used for pattern formation. Therefore, for example, it can be used for applications such as UV molding material, stereolithography material, and 3D inkjet material.
- the photocurable composition for printed wiring boards of the present invention can be used as a marking ink in addition to a resist ink other than a solder resist, for example, an etching resist ink, a solder resist ink, and a plating resist ink.
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Abstract
Description
(A)比重3以下のフィラーは公知慣用のものを用いることができる。成分(A)のフィラーとしては、無機フィラーが好ましいが、有機フィラーであってもよい。
また、成分(A)のフィラーとして、比重が1~3のものが好ましい。
(A)比重3以下のフィラーの具体例としては、水酸化アルミニウム(比重:2.42)、水酸化マグネシウム(比重:2.3~2.4)、タルク(比重:2.7~2.8)、シリカ(比重:2.2)、炭酸マグネシウム(比重:2.98)、炭酸カルシウム(比重:2.4~2.7)、ハイドロタルサイト(2.03~2.09)、水酸化カルシウム(2.21)、セピオライト(2.0~2.3)、硫酸カルシウム(2.96、無水物)、(2.36、2水和物)、カオリン(2.6)、マイカ(2.8~3.0)、硫酸マグネシウム(2.65)、カーボンブラック(1.8~2.1)、フライアッシュ(1.9~2.1)、ウォラストナイト(2.9~3.0)等が挙げられる。比重3以下のフィラーを配合することに起因して、プリント配線板用硬化型組成物における沈降の発生を防止でき、さらにはんだ耐熱性や鉛筆硬度といった塗膜強度を向上することができる。
組成物中に含まれる粒子の最大粒径は、粒度分布計により測定することができ、そのD100値を最大粒径とする。
(B)水酸基を有する(メタ)アクリレート化合物は、モノマー又はオリゴマー等の低分子量の材料が使用され、具体的には分子量100~1000の範囲、好ましくは分子量110~700の範囲の材料が用いられる。
(C)光重合開始剤としては、特に限定されるものではなく、例えば光ラジカル重合開始剤を用いることができる。この光ラジカル重合開始剤としては、光、レーザー、電子線等によりラジカルを発生し、ラジカル重合反応を開始する化合物であれば全て用いることができる。
本発明のプリント配線板用硬化型組成物は、更に、2官能(メタ)アクリレート化合物(水酸基を有するものを除く)を含むことが好ましい。2官能(メタ)アクリレート化合物(水酸基を有するものを除く)を添加することにより、プリント配線板用硬化型組成物における各成分の相溶性をさらに向上させることができる。
本発明の硬化型組成物には、熱硬化成分を加えることができる。熱硬化成分を加えることにより密着性や耐熱性が向上することが期待できる。本発明に用いられる熱硬化成分としては、メラミン樹脂、ベンゾグアナミン樹脂、メラミン誘導体、ベンゾグアナミン誘導体等のアミノ樹脂、ブロックイソシアネート化合物、シクロカーボネート化合物、環状(チオ)エーテル基を有する熱硬化成分、ビスマレイミド、カルボジイミド樹脂等の公知の熱硬化性樹脂が使用できる。特に好ましいのは、保存安定性に優れる点より、ブロックイソシアネート化合物である。
芳香族ポリイソシアネートの具体例としては、例えば、4,4’-ジフェニルメタンジイソシアネート、2,4-トリレンジイソシアネート、2,6-トリレンジイソシアネート、ナフタレン-1,5-ジイソシアネート、o-キシリレンジイソシアネート、m-キシリレンジイソシアネートおよび2,4-トリレンダイマー等が挙げられる。
(式中、nは10~300を示す。)
で表わされる繰り返し単位から構成されることが好ましい。このような繰り返し単位のオレフィン性二重結合に起因して、プリント配線板用硬化型レジスト組成物に柔軟性が与えられ、基材への追従性が増し、良好な密着性が得られる。
希釈剤としては、希釈溶剤、光反応性希釈剤、熱反応性希釈剤等が挙げられる。これらの希釈剤の中でも光反応性希釈剤が好ましい。
光反応性希釈剤としては、(メタ)アクリレート類、ビニルエーテル類、エチレン誘導体、スチレン、クロロメチルスチレン、α-メチルスチレン、無水マレイン酸、ジシクロペンタジエン、N-ビニルピロリドン、N-ビニルホルムアミド、キシリレンジオキセタン、オキセタンアルコール、3-エチル-3-(フェノキシメチル)オキセタン、レゾルシノールジグリシジルエーテル等の不飽和二重結合やオキセタニル基、エポキシ基を有する化合物が挙げられる。
これらの中でも(メタ)アクリレート類が好ましく、さらに好ましくは単官能(メタ)アクリレート類が好ましい。単官能(メタ)アクリレート類としては、例えば、メチル(メタ)アクリレート、エチル(メタ)アクリレート、ブチル(メタ)アクリレート、イソブチル(メタ)アクリレート、ラウリル(メタ)アクリレート、ステアリル(メタ)アクリレート、2-ヒドロキシエチル(メタ)アクリレート、ヒドロキシプロピル(メタ)アクリレート、ヒドロキシブチル(メタ)アクリレート、グリシジルメタクリレート等の(メタ)アクリレート類や、アクリロイルモルホリン等を挙げることができる。
これらの希釈剤の配合量は、本発明の硬化型組成物100質量部中、1~30質量部が好ましい。
3官能以上の(メタ)アクリレート化合物としては、トリメチロールプロパントリアクリレート、トリメチロールメタントリアクリレート、エチレンオキシド変性トリメチロールプロパントリアクリレート、プロピレンオキシド変性トリメチロールプロパントリアクリレート、エピクロルヒドリン変性トリメチロールプロパントリアクリレート、ペンタエリスリトールテトラアクリレート、テトラメチロールメタンテトラアクリレート、エチレンオキシド変性リン酸トリアクリレート、プロピレンオキシド変性リン酸トリアクリレート、エピクロルヒドリン変性グリセロールトリアクリレート、ジペンタエリスリトールヘキサアクリレート、ジトリメチロールプロパンテトラアクリレート、あるいはこれらのシルセスキオキサン変性物等に代表される多官能アクリレート、あるいはこれらに対応するメタアクリレートモノマー、εカプロラクトン変性トリスアクリロキシエチルイソシアヌレートが挙げられる。当該3官能以上の多官能(メタ)アクリレート化合物の配合量は本発明の組成物100質量部中、1~40質量部が好ましい。
表1に示す成分を、同表に示す割合(単位:部)にて配合し、攪拌機にて予備混合し、硬化型組成物を調製した。
表1中の実施例1~5及び比較例1~2の配合に従った調製により得られたプリント配線板用硬化型組成物を透明なガラス瓶の容器に適量入れ密閉した後、25℃で1ヶ月間放置した後、沈殿物の有無を目視にて確認し、以下の評価基準にて評価した。
○:沈殿物が確認されず均一。
×:沈殿物が確認された。
-:(フィラー未配合の為)沈殿物が生じず。
測定結果を表2に示す。
1.で用いた1ヶ月静置後の実施例1~5及び比較例1~2の各プリント配線板用硬化型組成物を30μmのアプリケーター(ERICHSEN社製)を使ってポリイミド基材(ユーピレックス25S)に塗布し、高圧水銀灯(ORC社製HMW-713)150mJ/cm2にて硬化を行い、塗膜の表面の指触乾燥性を評価した。
○:タック性無し
×:硬化せず、液状のまま
測定結果を表2に示す。
1.で用いた1ヶ月静置後の実施例1~5及び比較例1~2の各プリント配線板用硬化型組成物を30μmのアプリケーター(ERICHSEN社製)を使ってポリイミド基材(ユーピレックス25S)上に塗布し、高圧水銀灯(ORC社製HMW-713)150mJ/cm2にて硬化を行った。 その後、150℃の熱風循環式乾燥炉にて60分間加熱処理を行った。作製したサンプルに対してクロスカットテープピール試験(JIS K5600)を実施した。
○:剥離なし
×:剥離あり
測定結果を表2に示す。
1.で用いた1ヶ月静置後の実施例1~5及び比較例1~2の各プリント配線板用硬化型組成物を30μmのアプリケーター(ERICHSEN社製)を使ってFR-4基材上に塗布し、高圧水銀灯(ORC社製HMW-713)150mJ/cm2にて硬化を行った。その後、150℃の熱風循環式乾燥炉にて60分間加熱処理を行った。作製したサンプルに対してクロスカットテープピール試験(JIS K5600)を実施した。
○:剥離なし
×:剥離あり
測定結果を表2に示す。
1.で用いた1ヶ月静置後の実施例1~5及び比較例1~2の各プリント配線板用硬化型組成物を30μmのアプリケーター(ERICHSEN社製)を使って銅箔上に塗布し、高圧水銀灯(ORC社製HMW-713)150mJ/cm2にて硬化を行った。その後、150℃の熱風循環式乾燥炉にて60分間加熱処理を行った。作製したサンプルに対してクロスカットテープピール試験を実施した。
○:剥離なし
×:剥離あり
測定結果を表2に示す。
5.で得られた硬化塗膜、表面における鉛筆硬度をJIS K 5600-5-4に準拠して測定を行った。
厚さ25μmのポリイミドフィルムと、厚さ12μmの銅箔により形成された櫛形の銅配線(配線パターン)とから構成されるフレキシブル銅張り積層板(長さ110mm、幅60mm、銅配線幅/銅配線間幅=200μm/200μm)を準備した。このフレキシブル銅張り積層板の基板にピエゾ型インクジェット印刷機を用いてインクジェット印刷により膜厚が15μmになるように塗布した。この時、印刷直後にインクジェットヘッドに付帯の高圧水銀灯にてUV仮硬化を行った。その後150℃で1時間の加熱により硬化を行い試験片を得た。硬化後の試験片に対して、MIT(Massachusetts Institute of Technology)試験機を用いて下記条件にて保護膜を内側にして折り曲げを繰り返し実施し、導通がとれなくなるサイクル数を求めた。1回の評価につき33試験片に対して試験を実施し、導通がとれなくなる平均値を計算した。試験条件及び判定基準は以下に示す通りである。
耐MIT試験条件
荷重:500gf
角度:角対向135°
速度:175回/分
先端:R0.38mm円筒
評価基準
○:50回以上
×:50回未満
5.で得られた硬化塗膜をアセトンに30分間浸漬した後の塗膜状態を目視にて観察し、以下の基準で評価した。
評価基準
○:全く変化が認められないもの。
×:塗膜の膨潤又は剥離が認められるもの。
5.で得られた硬化塗膜を5wt%の硫酸水溶液に10分間浸漬した後の塗膜状態を目視にて観察し、以下の基準で観察した。
評価基準
○:全く変化が認められないもの。
×:塗膜の膨潤又は剥離が認められるもの。
5.で得られた硬化塗膜を、JIS C-5012の方法に準拠し、260℃のはんだ槽に10秒間浸漬後、セロハン粘着テープによるピーリング試験を行った後の塗膜状態を目視にて観察し、以下の基準で評価した。
評価基準
○:塗膜に変化がないもの。
△:塗膜が変化しているもの。
×:塗膜が剥離したもの。
市販の無電解ニッケルめっき浴及び無電解金めっき浴を用いて、ニッケル0.5μm、金0.03μmの条件で5.で得られた硬化塗膜にめっきを行ない、硬化塗膜表面状態の観察を行った。判定基準は以下の通りである。
評価基準
○:全く変化が認められないもの。
×:顕著に白化若しくは曇りが生じたもの。
※1:DPGDA、ジプロピレングリコールジアクリレート(BASFジャパン社製)
※2:4HBA、4-ヒドロキシブチルアクリレート(日本化成社製)
※3:Laromer LR8863:EO変性トリメチロールプロパントリアクリレート(BASFジャパン社製)
※4:エベクリル168(ダイセル・オルネクス社製)
※5:ダロキュア1173、2-ヒドロキシ-2-メチル-1-フェニル-プロパン-1-オン(BASFジャパン社製)
※6:2-エチルAQ、2-エチルアントラキノン(BASFジャパン社製)
※7:イルガキュア 819、ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド(BASFジャパン社製)
※8:BI7982、ブロックイソシアネート(Baxenden社製)
※9:disperbyk-111、湿潤分散剤(ビックケミー・ジャパン社製)
※10:BYK-307、シリコン系添加剤(ビックケミー・ジャパン社製)
※11:Nipsil SS-70、比重2.2(東ソー・シリカ社製)
※12:ハイジライト H43、比重2.5(昭和電工社製)
※13:LMP-100、比重2.7(富士タルク工業社製)
※14:B-30、比重4.5 (堺化学工業社製)
Claims (12)
- (A)比重3以下のフィラーと、
(B)水酸基を有する(メタ)アクリレート化合物と、
(C)光重合開始剤と、を含むことを特徴とするプリント配線板用硬化型組成物。 - 前記(A)比重3以下のフィラーが無機フィラーであることを特徴とする請求項1に記載のプリント配線板用硬化型組成物。
- 組成物中に含まれる粒子の最大粒径が0.1~5μm以下であることを特徴とする請求項1に記載のプリント配線板用硬化型組成物。
- さらに、2官能(メタ)アクリレート化合物を含むことを特徴とする請求項1に記載のプリント配線板用硬化型組成物。
- 前記2官能(メタ)アクリレート化合物の25℃における粘度が5~50mPa・sであることを特徴とする請求項4に記載のプリント配線板用硬化型組成物。
- さらに、熱硬化成分を含むことを特徴とする請求項1に記載のプリント配線板用硬化型組成物。
- 50℃における粘度が5~50mPa・sである請求項1に記載のプリント配線板用硬化型組成物。
- 請求項1に記載のプリント配線板用硬化型組成物に対して光照射することにより得られることを特徴とする硬化塗膜。
- 請求項1に記載のプリント配線板用硬化型組成物が基板上に印刷され、これを光照射することにより得られるパターン硬化塗膜を有することを特徴とするプリント配線板。
- 請求項1に記載のプリント配線板用硬化型組成物がインクジェット印刷法により基板上に印刷され、これを光照射することにより得られるパターン硬化塗膜を有することを特徴とするプリント配線板。
- 前記基板がプラスチック基板であることを特徴とする請求項9に記載のプリント配線板。
- 前記基板がプラスチック基板であることを特徴とする請求項10に記載のプリント配線板。
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| JP5632978B1 (ja) * | 2013-06-28 | 2014-11-26 | 太陽インキ製造株式会社 | 光硬化性組成物およびその硬化物 |
| JP5968291B2 (ja) * | 2013-09-30 | 2016-08-10 | 太陽インキ製造株式会社 | プリント配線板用白色硬化型組成物、これを用いた硬化塗膜及びプリント配線板 |
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2013
- 2013-11-05 JP JP2013229678A patent/JP5758472B2/ja active Active
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2014
- 2014-09-30 KR KR1020167014331A patent/KR102196310B1/ko active Active
- 2014-09-30 EP EP14860632.0A patent/EP3067371B1/en active Active
- 2014-09-30 US US15/028,955 patent/US10005911B2/en active Active
- 2014-09-30 CN CN201480060735.1A patent/CN105705525B/zh active Active
- 2014-09-30 WO PCT/JP2014/076102 patent/WO2015068499A1/ja not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105705525A (zh) | 2016-06-22 |
| JP2015089903A (ja) | 2015-05-11 |
| KR102196310B1 (ko) | 2020-12-29 |
| EP3067371A1 (en) | 2016-09-14 |
| KR20160083024A (ko) | 2016-07-11 |
| EP3067371A4 (en) | 2017-07-19 |
| EP3067371B1 (en) | 2020-02-12 |
| US10005911B2 (en) | 2018-06-26 |
| CN105705525B (zh) | 2018-04-03 |
| US20160251520A1 (en) | 2016-09-01 |
| JP5758472B2 (ja) | 2015-08-05 |
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