WO2011074528A1 - 感光性樹脂組成物、そのドライフィルム及びそれらを用いたプリント配線板 - Google Patents
感光性樹脂組成物、そのドライフィルム及びそれらを用いたプリント配線板 Download PDFInfo
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- WO2011074528A1 WO2011074528A1 PCT/JP2010/072355 JP2010072355W WO2011074528A1 WO 2011074528 A1 WO2011074528 A1 WO 2011074528A1 JP 2010072355 W JP2010072355 W JP 2010072355W WO 2011074528 A1 WO2011074528 A1 WO 2011074528A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
- C08G18/6407—Reaction products of epoxy resins with at least equivalent amounts of compounds containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
-
- 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
-
- 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
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
- G03F7/031—Organic compounds not covered by group G03F7/029
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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
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/035—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polyurethanes
-
- 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
- H05K3/281—Applying non-metallic protective coatings by means of a preformed insulating foil
-
- 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
- H05K2201/01—Dielectrics
- H05K2201/0104—Properties and characteristics in general
- H05K2201/012—Flame-retardant; Preventing of inflammation
Definitions
- the present invention relates to a photosensitive resin composition capable of forming a solder resist having a non-halogen composition, a low environmental load, flame retardancy, low warpage, and excellent bendability.
- the present invention also relates to a dry film using the photosensitive resin composition and a flame retardant printed wiring board.
- a printed wiring board and a flexible wiring board are required to be flame retardant because they are mounted on an electronic device, and a solder resist that is a part of them is also required to have flame resistance.
- FPC is usually a polyimide substrate, and is a thin film unlike a printed wiring board of a glass epoxy substrate.
- the solder resist to be applied has the same film thickness on both the printed wiring board and the FPC, in the case of a thin-film FPC, the burden on the solder resist is relatively increased.
- Patent Document 1 discloses (a) a binder polymer, (b) a halogenated aromatic ring such as a bromophenyl group, and a polymerizable ethylenic group such as a (meth) acryloyl group.
- Patent Document 2 discloses a polybasic reaction product of a biphenyl novolac epoxy resin and an unsaturated monocarboxylic acid.
- An alkali aqueous solution-soluble resin obtained by adding an acid anhydride, a biphenyl novolac type epoxy resin as a curing agent, and a photopolymerization initiator-containing photosensitive resin composition have been proposed. Regarding sex, it was not enough.
- the present invention has a non-halogen composition, has a low environmental load, is flame retardant, has low warpage, has excellent bendability, and is a printed wiring board, particularly TAB (tape automated ponding), COF (chip on film).
- a photosensitive resin composition for printed wiring boards that can be developed with an alkali, which is optimal as a solder resist for a flexible wiring board (FPC) represented by, for example, and has excellent characteristics such as solder heat resistance and gold plating resistance.
- the purpose is to provide.
- the object of the present invention is to use such a photosensitive resin composition to have a dry film having low warpage and excellent properties such as flame retardancy and bendability, and a flame retardant coating having such excellent properties. It is to provide a printed wiring board.
- an alkali development comprising a carboxyl group-containing urethane resin having a biphenyl novolac structure, a photopolymerization initiator, and an aluminum hydroxide and / or a phosphorus-containing compound.
- a possible photosensitive resin composition for a printed wiring board is provided.
- the carboxyl group-containing urethane resin is obtained by reacting a diol compound obtained by reacting a monobasic acid with an epoxy resin having a biphenyl novolak structure, a diol compound having a carboxyl group, and a diisocyanate compound.
- a urethane resin containing carboxyl group e.g., a urethane resin containing carboxyl group.
- the said photoinitiator contains an oxime ester compound.
- it can be set as a photocurable thermosetting resin composition by containing a thermosetting component other than said each component.
- a colorant is further contained.
- Such a photosensitive resin composition can be suitably used for forming a solder resist on a printed wiring board.
- a dry film obtained by applying and drying the photosensitive resin composition on a film Furthermore, according to the present invention, a coating film formed by applying the photosensitive resin composition on a substrate or a dry film obtained by applying and drying the photosensitive resin composition on a film is laminated on the substrate. A printed wiring board having a cured film obtained by photocuring the formed coating film in a pattern is also provided.
- the photosensitive resin composition of the present invention contains a carboxyl group-containing urethane resin having a biphenyl novolak structure, a photopolymerization initiator, aluminum hydroxide and / or a phosphorus-containing compound. It is possible to form a film excellent in various properties such as solder heat resistance and gold plating resistance as well as excellent in flammability, low warpage and bendability. Therefore, by using the photosensitive resin composition of the present invention, it has a dry film having low warpage and excellent properties such as flame retardancy and bendability, and a flame retardant solder resist film having such excellent properties.
- a printed wiring board can be provided.
- a photosensitive resin composition containing a carboxyl group-containing urethane resin having a biphenyl novolac structure, a photopolymerization initiator, aluminum hydroxide and / or a phosphorus-containing compound.
- the object has been found to have a low warpage and excellent bendability, and also has a remarkable effect on flame retardancy, and has completed the present invention. Achieving all these characteristics was a surprising effect in view of the problems of the prior art.
- each structural component of the photosensitive resin composition of this invention is demonstrated in detail.
- the carboxyl group-containing urethane resin having a biphenyl novolak structure contained in the photosensitive resin composition of the present invention can be obtained by reacting a monobasic acid with an epoxy resin having a biphenyl novolak structure having the structure of the following formula (I):
- a resin obtained by reacting a diol compound, a diol compound having a carboxyl group, and a diisocyanate compound can be suitably used.
- n represents an average value and is 1.01 to 5
- the epoxy resin having the biphenyl novolak structure is commercially available as NC-3000 (manufactured by Nippon Kayaku Co., Ltd.).
- monobasic acid from the point which can introduce photosensitivity (acryloyl group or methacryloyl group) into the carboxyl group-containing urethane resin obtained, and can provide photocurability, unsaturated monocarboxylic acid
- Particularly preferred are those having a (meth) acryloyl group.
- Specific examples include acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, ⁇ -acryloxypropionic acid, hydroxyalkyl (meth) acrylate and dibasic acid having one hydroxyl group and one (meth) acryloyl group.
- Reaction product with anhydride reaction product of polyfunctional (meth) acrylate having one hydroxyl group and plural (meth) acryloyl groups and dibasic acid anhydride, caprolactone modified product of these monobasic acids, etc. 1 type or 2 types or more can be used.
- preferred are those having a (meth) acryloyl group such as acrylic acid and methacrylic acid.
- (meth) acrylate is a term that collectively refers to acrylate, methacrylate, and mixtures thereof, and the same applies to other similar expressions.
- reaction between the epoxy resin having a biphenyl novolac structure and a monobasic acid a conventionally known method of reaction between an epoxy group and a carboxyl group can be employed.
- the reaction is usually carried out at about 50 to 150 ° C. in the presence or absence of an organic solvent as described later and in the presence of a polymerization inhibitor such as hydroquinone or oxygen.
- a tertiary amine such as triethylamine, a quaternary ammonium salt such as triethylbenzylammonium chloride, an imidazole compound such as 2-ethyl-4-methylimidazole, a phosphorus compound such as triphenylphosphine is added as a catalyst as necessary. May be.
- the ratio of each component in the above reaction is 1.0 to 1.2 equivalents of acid groups of monobasic acid with respect to 1 equivalent of epoxy groups of epoxy resin having a biphenyl novolac structure. A proportion is preferred.
- the diol compound obtained by reacting a monobasic acid with the epoxy resin having a biphenyl novolak structure, the diol compound having a carboxyl group, and the diisocyanate compound have a biphenyl novolak structure of the present invention.
- a carboxyl group-containing urethane resin is obtained.
- a conventionally well-known method can be employ
- the ratio of each component in the above reaction is a diol compound (a diol compound obtained by reacting a monobasic acid with an epoxy resin having a biphenyl novolak structure) with respect to 1 equivalent of an isocyanate group of a diisocyanate compound.
- a diol compound having a carboxyl group are preferably in a ratio such that the total hydroxyl group is 1.0 to 2.5 equivalents.
- the hydroxyl equivalent ratio of the diol compound obtained by reacting a monobasic acid with an epoxy resin having a biphenyl novolak structure and the diol compound having a carboxyl group is preferably in a ratio of 2: 8 to 8: 2.
- the carboxyl group-containing diol compound used for the synthesis of the carboxyl group-containing urethane resin having the biphenyl novolak structure is not particularly limited, and examples thereof include dimethylolpropionic acid, dimethylolbutanoic acid, trifunctional or more functional polyol compounds, and many more.
- a reaction product with a basic acid anhydride, etc. are mentioned. These may be used alone or in combination of two or more.
- the diisocyanate compound used for the synthesis of the carboxyl group-containing urethane resin having the biphenyl novolak structure a known and commonly used aromatic or aliphatic diisocyanate compound can be used.
- a diisocyanate compound that is not synthesized using a phosgene method is preferable in order to reduce the halogen content of the obtained resin.
- aliphatic isocyanate is more preferable.
- 1,6-hexamethylene diisocyanate 1,4-tetramethylene diisocyanate, 1,12-dodecamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexa And methylene diisocyanate.
- diisocyanate compounds 2,4,4-trimethylhexamethylene diisocyanate is particularly preferable from the viewpoint of flexibility.
- the carboxyl group-containing urethane resin having the biphenyl novolak structure has a large number of carboxyl groups in the side chain of the backbone polymer, it becomes a cross-linking point during thermosetting. Further, when a photosensitive composition is used, development with an alkaline aqueous solution becomes possible.
- the acid value of the carboxyl group-containing urethane resin having a biphenyl novolak structure is desirably in the range of 30 to 200 mgKOH / g, more preferably in the range of 40 to 120 mgKOH / g. From the viewpoint of alkali developability, if the acid value of the carboxyl group-containing urethane resin is less than 30 mgKOH / g, alkali development becomes difficult. On the other hand, if it exceeds 200 mgKOH / g, dissolution of the exposed portion by the developer proceeds. It is not preferable because the line becomes thinner than necessary, or in some cases, the resist is dissolved and peeled with a developer without distinction between the exposed and unexposed areas, making it difficult to draw a normal resist pattern.
- the weight average molecular weight of the carboxyl group-containing urethane resin having a biphenyl novolac structure varies depending on the resin skeleton, but is generally in the range of 2,000 to 150,000, and more preferably 5,000 to 100,000. Is preferred. When the weight average molecular weight is less than 2,000, the heat resistance is insufficient. On the other hand, when the weight average molecular weight exceeds 150,000, the storage stability may be inferior.
- the blending amount of the carboxyl group-containing urethane resin having such a biphenyl novolak structure is 5 to 60% by mass, preferably 10 to 50% by mass in the total composition.
- the amount is less than the above range, the coating strength is lowered, which is not preferable.
- the amount is larger than the above range, the viscosity becomes high and the coating property and the like deteriorate, which is not preferable.
- the photopolymerization initiator is one or more selected from the group consisting of an oxime ester photopolymerization initiator having an oxime ester group, an ⁇ -aminoacetophenone photopolymerization initiator, and an acylphosphine oxide photopolymerization initiator.
- a photopolymerization initiator can be used.
- oxime ester photopolymerization initiators examples include CGI-325 manufactured by Ciba Japan, Irgacure (registered trademark) OXE01, Irgacure OXE02, N-1919 manufactured by ADEKA Corporation, Adeka Arcles NCI- 831 etc. are mentioned.
- numerator can also be used suitably, Specifically, the oxime ester compound which has a carbazole structure represented with the following general formula is mentioned.
- X is a hydrogen atom, an alkyl group having 1 to 17 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a phenyl group (an alkyl group having 1 to 17 carbon atoms, an alkoxy group having 1 to 8 carbon atoms).
- Y and Z are each a hydrogen atom, an alkyl group having 1 to 17 carbon atoms, or a carbon atom having 1 carbon atom), substituted with an alkyl group having a C 1-8 alkyl group or a dialkylamino group.
- X and Y are each a methyl group or an ethyl group
- Z is methyl or phenyl
- n is 0, and Ar is preferably phenylene, naphthylene, thiophene or thienylene.
- the blending amount of such an oxime ester photopolymerization initiator is preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the carboxyl group-containing urethane resin.
- it is less than 0.01 parts by mass, the photocurability on copper is insufficient, the coating film is peeled off, and the coating properties such as chemical resistance are deteriorated.
- it exceeds 5 parts by mass light absorption on the surface of the solder resist coating film becomes violent, and the deep curability tends to decrease. More preferably, it is 0.5 to 3 parts by mass.
- ⁇ -aminoacetophenone photopolymerization initiators include 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone-1, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone, N , N-dimethylaminoacetophenone and the like.
- Examples of commercially available products include Irgacure 907, Irgacure 369, and Irgacure 379 manufactured by Ciba Japan.
- acylphosphine oxide photopolymerization initiators include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and bis (2,6-dimethoxy). And benzoyl) -2,4,4-trimethyl-pentylphosphine oxide.
- Commercially available products include Lucilin TPO manufactured by BASF, Irgacure 819 manufactured by Ciba Japan.
- the blending amount of these ⁇ -aminoacetophenone photopolymerization initiator and acylphosphine oxide photopolymerization initiator is preferably 0.01 to 15 parts by mass with respect to 100 parts by mass of the carboxyl group-containing urethane resin. If it is less than 0.01 parts by mass, the photo-curability on copper is similarly insufficient, the coating film peels off, and the coating properties such as chemical resistance deteriorate. On the other hand, when the amount exceeds 15 parts by mass, the effect of reducing the outgas cannot be obtained, the light absorption on the surface of the solder resist coating film becomes intense, and the deep curability tends to be lowered. More preferably, it is 0.5 to 10 parts by mass.
- photopolymerization initiators, photoinitiator assistants, and sensitizers that can be suitably used in the photosensitive resin composition of the present invention include benzoin compounds, acetophenone compounds, anthraquinone compounds, thioxanthone compounds, ketal compounds, and benzophenone compounds.
- a tertiary amine compound, a xanthone compound, etc. can be mentioned.
- benzoin compound examples include benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin isopropyl ether.
- acetophenone compound examples include acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, and the like.
- anthraquinone compound examples include 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butylanthraquinone, 1-chloroanthraquinone and the like.
- thioxanthone compound examples include 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-diisopropylthioxanthone, and the like.
- ketal compound examples include acetophenone dimethyl ketal and benzyl dimethyl ketal.
- benzophenone compound examples include benzophenone, 4-benzoyldiphenyl sulfide, 4-benzoyl-4′-methyldiphenyl sulfide, 4-benzoyl-4′-ethyldiphenyl sulfide, and 4-benzoyl-4′-propyldiphenyl. And sulfides.
- the tertiary amine compound include an ethanolamine compound and a compound having a dialkylaminobenzene structure, such as 4,4′-dimethylaminobenzophenone (Nisso Cure MABP manufactured by Nippon Soda Co., Ltd.), Dialkylaminobenzophenone such as 4,4′-diethylaminobenzophenone (EAB manufactured by Hodogaya Chemical Co., Ltd.), 7- (diethylamino) -4-methyl-2H-1-benzopyran-2-one (7- (diethylamino) -4- Dialkylamino group-containing coumarin compounds such as methylcoumarin), ethyl 4-dimethylaminobenzoate (Kayacure (registered trademark) EPA manufactured by Nippon Kayaku Co., Ltd.), ethyl 2-dimethylaminobenzoate (International Bio-Synthetics) Quantacure DMB), 4-dimethyla
- thioxanthone compounds and tertiary amine compounds are preferred.
- the inclusion of a thioxanthone compound is preferable from the viewpoint of deep curability.
- thioxanthone compounds such as 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, and 2,4-diisopropylthioxanthone are preferably included.
- the amount of such a thioxanthone compound is preferably 20 parts by mass or less with respect to 100 parts by mass of the carboxyl group-containing urethane resin.
- the blending amount of the thioxanthone compound exceeds 20 parts by mass, the thick film curability is lowered and the cost of the product is increased. More preferably, it is 10 parts by mass or less.
- a compound having a dialkylaminobenzene structure is preferable, and among them, a dialkylaminobenzophenone compound, a dialkylamino group-containing coumarin compound having a maximum absorption wavelength of 350 to 450 nm, and ketocoumarins are particularly preferable.
- dialkylaminobenzophenone compound 4,4′-diethylaminobenzophenone is preferable because of its low toxicity.
- the dialkylamino group-containing coumarin compound has a maximum absorption wavelength of 350 to 410 nm in the ultraviolet region, so it is less colored and uses a colored pigment as well as a colorless and transparent photosensitive composition, and reflects the color of the colored pigment itself. It becomes possible to provide a solder resist film.
- 7- (diethylamino) -4-methyl-2H-1-benzopyran-2-one is preferred because it exhibits an excellent sensitizing effect on laser light having a wavelength of 400 to 410 nm.
- the compounding amount of such a tertiary amine compound is preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the carboxyl group-containing urethane resin.
- the amount of the tertiary amine compound is less than 0.1 parts by mass, a sufficient sensitizing effect tends not to be obtained.
- the amount exceeds 20 parts by mass light absorption on the surface of the dry solder resist coating film by the tertiary amine compound becomes intense, and the deep curability tends to decrease. More preferably, it is 0.1 to 10 parts by mass.
- photopolymerization initiators can be used alone or as a mixture of two or more.
- the total amount of such photopolymerization initiator, photoinitiator assistant, and sensitizer is preferably 35 parts by mass or less with respect to 100 parts by mass of the carboxyl group-containing urethane resin having the biphenyl novolac structure. When it exceeds 35 parts by mass, the deep curability tends to decrease due to light absorption.
- the photosensitive resin composition of the present invention preferably uses an oxime ester photopolymerization initiator.
- the effect is that not only a sufficient sensitivity can be obtained even in a small amount, but also the shrinkage of the cured coating film can be suppressed because the volatilization of the photopolymerization initiator in the post-heating process at the time of thermosetting and mounting is small. Therefore, it is possible to greatly reduce the warpage.
- the use of an acylphosphine oxide-based photopolymerization initiator improves the deep curability during photoreaction, and further incorporates an initiator-derived phosphorus-containing compound component cleaved by light irradiation into the cured product network, thereby allowing the cured coating.
- the phosphorus concentration in the film can be effectively increased, and further flame retardancy can be improved.
- the photopolymerization initiator, photoinitiator assistant, and sensitizer as described above absorb a specific wavelength, so that the sensitivity may be lowered in some cases and may function as an ultraviolet absorber. However, they are not used only for the purpose of improving the sensitivity of the composition. Absorbs light of a specific wavelength as necessary to improve the photoreactivity of the surface, change the resist line shape and opening to vertical, tapered, reverse taper, and processing accuracy of line width and opening diameter Can be improved.
- the photosensitive resin composition of the present invention it is effective to use either an oxime ester photopolymerization initiator or an acylphosphine oxide photopolymerization initiator, but the balance between the resist line shape and the opening described above is effective. From the standpoints of improving processing accuracy, and further improving low warpage, bendability, and flame retardancy, the combined use of an oxime ester photopolymerization initiator and an acylphosphine oxide photopolymerization initiator is more preferable.
- the aluminum hydroxide general-purpose known ones can be used, for example, Showa Denko Co., Ltd. Hygielite series, HW, H21, H31, H32, H42M, H43M and the like can be used.
- the one where the particle size of aluminum hydroxide is fine is more effective for bending resistance, it is dispersed in advance to the primary particle size with a bead mill or the like together with a solvent or resin, and filtered to 3 ⁇ m or more, more preferably 1 ⁇ m. It is preferable to filter and select the above from the viewpoint of flame retardancy and bendability of the resulting cured film.
- the amount of these aluminum hydroxides is desirably in the range of 0 to 300 parts by weight, preferably 0 to 200 parts by weight, more preferably 0 to 150 parts by weight, based on 100 parts by weight of the carboxyl group-containing urethane resin.
- the amount is preferably 10 to 120 parts by mass. If it exceeds 300 parts by mass, sufficient bendability cannot be obtained.
- the photosensitive resin composition of the present invention preferably contains a phosphorus-containing compound.
- a phosphorus-containing compound those conventionally known as organic phosphorus flame retardants are good, and there are phosphoric acid esters and condensed phosphoric acid esters, cyclic phosphazene compounds, phosphazene oligomers, or compounds represented by the following general formula (II). .
- R 1 , R 2 and R 3 each independently represent a substituent other than a halogen atom.
- Examples of commercially available phosphorus-containing compounds represented by the general formula (II) include HCA, SANKO-220, M-ESTER, and HCA-HQ (all are trade names of Sanko Co., Ltd.).
- Particularly preferred phosphorus-containing compounds used in the present invention include those having an acrylate group as a reactive group, those having a phenolic hydroxyl group, oligomers or polymers, phosphazene oligomers, phosphinates and the like.
- the phosphorus element-containing (meth) acrylate is preferably a compound having a phosphorus element and having a plurality of (meth) acryloyl groups in the molecule, specifically, R 1 in the general formula (II) and Examples include compounds in which R 2 is a hydrogen atom and R 3 is a (meth) acrylate derivative. In general, it can be synthesized by a Michael addition reaction of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with a known and commonly used polyfunctional (meth) acrylate monomer.
- glycol diacrylates such as ethylene glycol, methoxytetraethylene glycol, polyethylene glycol, and propylene glycol; hexanediol, trimethylolpropane, pentaerythritol, dipentaerythritol, and tris-hydroxy.
- Polyhydric alcohols such as ethyl isocyanurate or polyethyl acrylates such as these ethylene oxide adducts, propylene oxide adducts or caprolactone adducts; phenoxy acrylate, bisphenol A diacrylate, and ethylene oxide adducts of these phenols or Polyhydric acrylates such as propylene oxide adducts; and urethane acrylates of the above polyalcohols
- Polyglycerides of glycidyl ether such as glycerin diglycidyl ether, glycerin triglycidyl ether, trimethylolpropane triglycidyl ether, triglycidyl isocyanurate; and melamine acrylate and / or methacrylates corresponding to the above acrylate .
- a phosphorus-containing compound having a phenolic hydroxyl group is highly hydrophobic and heat resistant, has no deterioration in electrical properties due to hydrolysis, and has high solder heat resistance. Further, as an appropriate combination, when an epoxy resin is used among thermosetting resins, there is an advantage that it does not bleed out after curing because it reacts with the epoxy group and is taken into the network.
- Commercially available products include HCA-HQ manufactured by Sanko Co., Ltd.
- the phosphorus-containing compound which is an oligomer or polymer, has the advantage that there is little decrease in bendability due to the influence of the alkyl chain, and there is no bleed-out after curing due to the large molecular weight.
- Commercially available products include M-Ester-HP manufactured by Sanko Co., Ltd., and phosphorus-containing Byron 337 manufactured by Toyobo Co., Ltd.
- a phenoxyphosphazene compound is effective, and there is a substituted or unsubstituted phenoxyphosphazene oligomer or a trimer, a tetramer, a pentamer, and a liquid or solid powder.
- any of them can be preferably used.
- Commercially available products include FP-100, FP-300, and FP-390 manufactured by Fushimi Pharmaceutical Co., Ltd.
- phenoxyphosphazene oligomers substituted with alkyl groups or polar groups such as hydroxyl groups and cyano groups have high solubility in carboxyl group-containing resins, and there are no problems such as recrystallization even when added in large amounts. preferable.
- phosphinate flame retardancy can be improved without impairing the cured coating film flexibility.
- phosphinate having excellent heat resistance, the bleed-out of the flame retardant can be suppressed in the hot press during mounting.
- Commercially available products include EXOLIT OP 930 and EXOLIT OP 935 manufactured by Clariant.
- the amount of the phosphorus-containing compound as a flame retardant is preferably in the range of 0 to 200 parts by weight, particularly preferably 0 to 100 parts by weight, with respect to 100 parts by weight of the carboxyl group-containing urethane resin having the biphenyl novolac structure. More preferably, it is 10 to 80 parts by mass. If blended in a larger amount than this, the bending properties of the resulting cured film will deteriorate, such being undesirable.
- thermosetting component can be added to the photosensitive resin composition of the present invention in order to impart heat resistance.
- thermosetting component used in the present invention include known and commonly used blocked isocyanate compounds, amino resins, maleimide compounds, benzoxazine resins, carbodiimide resins, cyclocarbonate compounds, polyfunctional epoxy compounds, polyfunctional oxetane compounds, episulfide resins, and the like.
- a thermosetting resin can be used.
- a preferable thermosetting component is a thermosetting component having a plurality of cyclic ether groups and / or cyclic thioether groups (hereinafter abbreviated as cyclic (thio) ether groups) in one molecule.
- cyclic (thio) ether groups There are many commercially available thermosetting components having a cyclic (thio) ether group, and various properties can be imparted depending on the structure.
- thermosetting component having a plurality of cyclic (thio) ether groups in the molecule includes either one of a three-, four- or five-membered cyclic ether group or a cyclic thioether group or two kinds of groups in the molecule.
- 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 plurality of thioether groups in the molecule
- the compound which has this, ie, an episulfide resin etc. are mentioned.
- Examples of the polyfunctional epoxy compound include jER (registered trademark) 828, jER834, jER1001, and jER1004 manufactured by Japan Epoxy Resin, Epicron (registered trademark) 840, Epicron 850, Epicron 1050, Epicron 1050, and Toto, manufactured by DIC Corporation.
- Bisphenol A type epoxy resin such as 664 (all trade names); jERYL903 manufactured by Japan Epoxy Resin, Epicron 152, Epicron 165 manufactured by DIC, Epototo YDB-400, YDB-500 manufactured by Tohto Kasei Co., Ltd., Dow Chemical D. E. R. 542, Araldide 8011 manufactured by Ciba Japan, Sumi-epoxy ESB-400, ESB-700 manufactured by Sumitomo Chemical Co., Ltd. E. R. 711, A.I. E. R. 714 (both trade names) brominated epoxy resin; jER152, jER154 manufactured by Japan Epoxy Resin, D.C. E. N. 431, D.D. E. N.
- Novolak type epoxy resins such as ECN-235, ECN-299, etc. (both trade names); Epicron 830 manufactured by DIC, jER807 manufactured by Japan Epoxy Resin, Epotote YDF-170, YDF-175, YDF-175 manufactured by Toto Kasei 2004, Bisphenol F type epoxy resin such as Araldide XPY306 manufactured by Ciba Japan Co., Ltd. (all trade names); Hydrogenated bisphenol such as Epototo ST-2004, ST-2007, ST-3000 (trade names) manufactured by Tohto Kasei Co., Ltd.
- Type A epoxy resin jER604 manufactured by Japan Epoxy Resin, Epototo YH-434 manufactured by Tohto Kasei Co., Ltd., Araldide MY720 manufactured by Ciba Japan, Sumi-epoxy ELM-120 manufactured by Sumitomo Chemical Co., Ltd. ) Glycidylamine type epoxy resin; Hydantoin type epoxy resin such as Araldide CY-350 (trade name) manufactured by Bread; Celoxide (registered trademark) 2021 manufactured by Daicel Chemical Industries, Araldide CY175, CY179 manufactured by Ciba Japan (all trade names) Alicyclic epoxy resin: YL-933 manufactured by Japan Epoxy Resin Co., Ltd. E. N.
- EPPN-501, EPPN-502, etc. trihydroxyphenylmethane type epoxy resin
- Xylenol type or biphenol type epoxy resins or mixtures thereof bisphenol S type epoxy resins such as Nippon Kayaku EBPS-200, ADEKA EPX-30, DIC EXA-1514 (trade name); Japan epoxy resin Bisphenol A novolac type epoxy resin such as jER157S (trade name) manufactured by KK; tetraphenylolethane type epoxy resin such as jERYL-931 manufactured by Japan Epoxy Resin, Araldide 163 manufactured by Ciba Japan Co., Ltd.
- These epoxy resins can be used alone or in combination of two or more.
- a biphenyl novolac type epoxy resin, a bixylenol type epoxy resin or a mixture thereof is 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-oxetanyl)
- polyfunctional oxetanes such as 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-hydroxystyrene
- Examples of the episulfide resin having a plurality of cyclic thioether groups in the molecule include YL7000 (bisphenol A type episulfide resin) manufactured by Japan Epoxy Resin, YSLV-120TE manufactured by Tohto Kasei Co., Ltd., and the like. 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.
- the amount of the thermosetting component having a plurality of cyclic (thio) ether groups in the molecule is preferably 0.6 to 2.5 equivalents relative to 1 equivalent of the carboxyl group of the carboxyl group-containing urethane resin. A range of 0.8 to 2.0 equivalents is preferred.
- the compounding amount of thermosetting components having multiple cyclic (thio) ether groups in the molecule is less than 0.6, carboxyl groups remain in the solder resist film, resulting in decreased heat resistance, alkali resistance, electrical insulation, etc. Therefore, it is not preferable.
- the amount exceeds 2.5 equivalents the low molecular weight cyclic (thio) ether group remains in the dry coating film, which is not preferable because the strength of the coating film decreases.
- thermosetting components that can be suitably used include amino resins such as melamine derivatives and benzoguanamine derivatives.
- amino resins such as melamine derivatives and benzoguanamine derivatives.
- examples 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 can be used individually or in combination of 2 or more types.
- a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule is added to the photosensitive resin composition of the present invention in order to improve the curability of the composition and the toughness of the resulting cured film.
- Such a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule is a compound having a plurality of isocyanate groups in one molecule, that is, a polyisocyanate compound, or a plurality of blocked isocyanate groups in one molecule.
- the compound which has, ie, a blocked isocyanate compound, etc. are mentioned.
- polyisocyanate compound for example, aromatic polyisocyanate, aliphatic polyisocyanate or alicyclic polyisocyanate is used.
- aromatic polyisocyanate include 4,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, naphthalene-1,5-diisocyanate, o-xylylene diisocyanate, m- Examples include 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.
- adduct bodies, burette bodies, and isocyanurate bodies of the isocyanate compounds listed above may be mentioned.
- the blocked isocyanate group contained in the blocked isocyanate compound is a group in which the isocyanate group is protected by reaction with a blocking agent and temporarily deactivated. When heated to a predetermined temperature, the blocking agent is dissociated to produce isocyanate groups.
- the blocked isocyanate compound an addition reaction product of an isocyanate compound and an isocyanate blocking agent is used.
- the isocyanate compound that can react with the blocking agent include isocyanurate type, biuret type, and adduct type.
- aromatic polyisocyanate, aliphatic polyisocyanate, or alicyclic polyisocyanate is used, for example.
- Specific examples of the aromatic polyisocyanate, aliphatic polyisocyanate, and alicyclic polyisocyanate include the compounds exemplified above.
- isocyanate blocking agent for example, phenol 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, lactic acid Alcohol-based blocking agents such as chill and ethyl lactate; oxime-based blocking agents such as formaldehyde oxime, acetaldoxime, acetoxi
- the blocked isocyanate compound may be commercially available, for example, Sumidur (registered trademark) BL-3175, BL-4165, BL-1100, BL-1265, Desmodur (registered trademark) TPLS-2957, TPLS-2062.
- the compounds having a plurality of isocyanate groups or blocked isocyanate groups in one molecule can be used singly or in combination of two or more.
- the compounding amount of such a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule is 1 to 100 parts by mass, more preferably 2 to 70 parts per 100 parts by mass of the carboxyl group-containing urethane resin. The proportion of parts by mass is appropriate. When the amount is less than 1 part by mass, sufficient toughness of the coating film cannot be obtained, which is not preferable. On the other hand, when it exceeds 100 parts by mass, the storage stability is lowered, which is not preferable.
- a urethanization catalyst can be added to the photosensitive resin composition of the present invention in order to accelerate the curing reaction of hydroxyl groups or carboxyl groups with isocyanate groups.
- the urethanization catalyst one or more urethanization catalysts selected from the group consisting of tin-based catalysts, metal chlorides, metal acetylacetonate salts, metal sulfates, amine compounds, and / or amine salts should be used. Is preferred.
- tin catalyst examples include organic tin compounds such as stannous octoate and dibutyltin dilaurate, and inorganic tin compounds.
- the metal chloride is a metal chloride made of Cr, Mn, Co, Ni, Fe, Cu, or Al, and examples thereof include cobalt chloride, ferrous nickel chloride, and ferric chloride.
- the metal acetylacetonate salt is a metal acetylacetonate salt made of Cr, Mn, Co, Ni, Fe, Cu or Al, for example, cobalt acetylacetonate, nickel acetylacetonate, iron acetylacetonate, etc. Is mentioned.
- the metal sulfate is a metal sulfate composed of Cr, Mn, Co, Ni, Fe, Cu, or Al, and examples thereof include copper sulfate.
- Examples of the amine compound include conventionally known triethylenediamine, N, N, N ′, N′-tetramethyl-1,6-hexanediamine, bis (2-dimethylaminoethyl) ether, N, N, N ′.
- N ′′, N ′′ -pentamethyldiethylenetriamine N-methylmorpholine, N-ethylmorpholine, N, N-dimethylethanolamine, dimorpholinodiethyl ether, N-methylimidazole, dimethylaminopyridine, triazine, N′- (2-hydroxyethyl) -N, N, N′-trimethyl-bis (2-aminoethyl) ether, N, N-dimethylhexanolamine, N, N-dimethylaminoethoxyethanol, N, N, N′-trimethyl-N '-(2-hydroxyethyl) ethylenediamine, N- (2-hydroxy Chill) -N, N ′, N ′′, N ′′ -tetramethyldiethylenetriamine, N- (2-hydroxypropyl) -N, N ′, N ′′, N ′′ -tetramethyldiethylenetriamine, N, N, N′-trimethyl
- Examples of the amine salt include an organic acid salt amine salt of DBU (1,8-diaza-bicyclo [5.4.0] undecene-7).
- the compounding amount of the urethanization catalyst is sufficient in an ordinary quantitative ratio, and for example, it is preferably 0.1 to 20 parts by mass, more preferably 0.5 to 100 parts by mass with respect to 100 parts by mass of the carboxyl group-containing urethane resin. 10.0 parts by mass.
- thermosetting component having a plurality of cyclic (thio) ether groups in the molecule
- thermosetting catalysts include imidazole, 2-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 4-phenylimidazole, 1-cyanoethyl-2-phenylimidazole.
- Imidazole derivatives such as 1- (2-cyanoethyl) -2-ethyl-4-methylimidazole; dicyandiamide, benzyldimethylamine, 4- (dimethylamino) -N, N-dimethylbenzylamine, 4-methoxy-N, N -Amine compounds such as dimethylbenzylamine and 4-methyl-N, N-dimethylbenzylamine; hydrazine compounds such as adipic acid dihydrazide and sebacic acid dihydrazide; and phosphorus compounds such as triphenylphosphine.
- Examples of commercially available products include 2MZ-A, 2MZ-OK, 2PHZ, 2P4BHZ, 2P4MHZ (both trade names of imidazole compounds) manufactured by Shikoku Kasei Kogyo Co., Ltd., and U-CAT manufactured by San Apro. (Registered trademark) 3503N, U-CAT3502T (all are trade names of blocked isocyanate compounds of dimethylamine), DBU, DBN, U-CATSA102, U-CAT5002 (all are bicyclic amidine compounds and salts thereof), etc. .
- thermosetting catalyst for epoxy resins or oxetane compounds or a catalyst that promotes the reaction of epoxy groups and / or oxetanyl groups with carboxyl groups, either alone or in combination of two or more. Can be used.
- thermosetting catalysts is sufficient at a normal quantitative ratio, for example, with respect to 100 parts by mass of the carboxyl group-containing urethane resin or thermosetting component having a plurality of cyclic (thio) ether groups in the molecule.
- the amount is preferably 0.1 to 20 parts by mass, more preferably 0.5 to 15.0 parts by mass.
- the photosensitive resin composition of the present invention can contain a colorant.
- a colorant conventionally known colorants such as red, blue, green and yellow can be used, and any of pigments, dyes and dyes may be used. Specific examples include those with the following color index numbers (CI; issued by The Society of Dyers and Colorists). However, it is preferable not to contain a halogen from the viewpoint of reducing the environmental burden and affecting the human body.
- Red colorant examples include monoazo, diazo, azo lake, benzimidazolone, perylene, diketopyrrolopyrrole, condensed azo, anthraquinone, and quinacridone. It is done.
- Monoazo Pigment Red 1, 2, 3, 4, 5, 6, 8, 9, 12, 14, 15, 16, 17, 21, 22, 23, 31, 32, 112, 114, 146, 147, 151 , 170, 184, 187, 188, 193, 210, 245, 253, 258, 266, 267, 268, 269.
- Disazo Pigment Red 37, 38, 41.
- Monoazo lakes Pigment Red 48: 1, 48: 2, 48: 3, 48: 4, 49: 1, 49: 2, 50: 1, 52: 1, 52: 2, 53: 1, 53: 2, 57 : 1, 58: 4, 63: 1, 63: 2, 64: 1,68.
- Benzimidazolone series Pigment Red 171, Pigment Red 175, Pigment Red 176, Pigment Red 185, Pigment Red 208.
- Perylene series Solvent Red 135, Solvent Red 179, Pigment Red 123, Pigment Red 149, Pigment Red 166, Pigment Red 178, Pigment Red 179, Pigment Red 190, Pigment Red 194, Pigment Red 224.
- Diketopyrrolopyrrole series Pigment Red 254, Pigment Red 255, Pigment Red 264, Pigment Red 270, Pigment Red 272.
- Condensed azo series Pigment Red 220, Pigment Red 144, Pigment Red 166, Pigment Red 214, Pigment Red 220, Pigment Red 221 and Pigment Red 242.
- Anthraquinone series Pigment Red 168, Pigment Red 177, Pigment Red 216, Solvent Red 149, Solvent Red 150, Solvent Red 52, Solvent Red 207.
- Kinacridone series Pigment Red 122, Pigment Red 202, Pigment Red 206, Pigment Red 207, Pigment Red 209.
- Blue colorant include phthalocyanine and anthraquinone, and pigments are compounds classified as Pigment, specifically: Pigment Blue 15, Pigment Blue 15: 1, Pigment Blue 15: 2, Pigment Blue 15: 3, Pigment Blue 15: 4, Pigment Blue 15: 6, Pigment Blue 16, Pigment Blue 60.
- the dye systems include Solvent Blue 35, Solvent Blue 63, Solvent Blue 68, Solvent Blue 70, Solvent Blue 83, Solvent Blue 87, Solvent Blue 94, Solvent Blue 97, Solvent Blue 122, Solvent Blue 136, Solvent Blue 67, Solvent Blue 70 etc. can be used.
- a metal-substituted or unsubstituted phthalocyanine compound can also be used.
- Green colorant examples include phthalocyanine, anthraquinone, and perylene. Specifically, Pigment Green 7, Pigment Green 36, Solvent Green 3, Solvent Green 5, Solvent Green 20, Solvent Green 28, etc. are used. be able to. In addition to the above, a metal-substituted or unsubstituted phthalocyanine compound can also be used.
- Yellow colorant examples include monoazo, disazo, condensed azo, benzimidazolone, isoindolinone, anthraquinone, and the like.
- Anthraquinone series Solvent Yellow 163, Pigment Yellow 24, Pigment Yellow 108, Pigment Yellow 193, Pigment Yellow 147, Pigment Yellow 199, Pigment Yellow 202.
- Isoindolinone type Pigment Yellow 110, Pigment Yellow 109, Pigment Yellow 139, Pigment Yellow 179, Pigment Yellow 185.
- Condensed azo series Pigment Yellow 93, Pigment Yellow 94, Pigment Yellow 95, Pigment Yellow 128, Pigment Yellow 155, Pigment Yellow 166, Pigment Yellow 180.
- Benzimidazolone series Pigment Yellow 120, Pigment Yellow 151, Pigment Yellow 154, Pigment Yellow 156, Pigment Yellow 175, Pigment Yellow 181.
- Monoazo Pigment Yellow 1, 2, 3, 4, 5, 6, 9, 10, 12, 61, 62, 62: 1, 65, 73, 74, 75, 97, 100, 104, 105, 111, 116 , 167, 168, 169, 182, 183.
- Disazo Pigment Yellow 12, 13, 14, 16, 17, 55, 63, 81, 83, 87, 126, 127, 152, 170, 172, 174, 176, 188, 198.
- a colorant such as purple, orange, brown, or black may be added for the purpose of adjusting the color tone.
- the blending ratio of the colorant as described above is not particularly limited, but is preferably 0 to 10 parts by weight, particularly preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the carboxyl group-containing urethane resin. Is enough.
- a photosensitive compound having a plurality of ethylenically unsaturated groups in the molecule can be used. This is photocured by active energy ray irradiation to insolubilize or insolubilize the carboxyl group-containing urethane resin in an alkaline aqueous solution.
- a photosensitive compound having a plurality of ethylenically unsaturated groups in the molecule. This is photocured by active energy ray irradiation to insolubilize or insolubilize the carboxyl group-containing urethane resin in an alkaline aqueous solution.
- polyester (meth) acrylate, polyether (meth) acrylate, urethane (meth) acrylate, carbonate (meth) acrylate, epoxy (meth) acrylate, and the like can be used.
- Hydroxyalkyl acrylates such as 2-hydroxyethyl acrylate and 2-hydroxypropyl acrylate; Diacrylates of glycols such as ethylene glycol, methoxytetraethylene glycol, polyethylene glycol, propylene glycol; N, N-dimethylacrylamide, N-methylolacrylamide Acrylamides such as N, N-dimethylaminopropyl acrylamide; N, N-dimethylaminoethyl acrylate, N, N-dimethylaminopropyl Aminoalkyl acrylates such as acrylates; polyhydric alcohols such as hexanediol, trimethylolpropane, pentaerythritol, dipentaerythritol, tris-hydroxyethyl isocyanurate, or their ethylene oxide adducts, propylene oxide adducts, or ⁇ -caprolactone Polyvalent acrylates such as adducts; polyvalent
- an epoxy acrylate resin obtained by reacting acrylic acid with a polyfunctional epoxy resin such as a cresol novolac type epoxy resin, and further, a hydroxy acrylate such as pentaerythritol triacrylate and a diisocyanate such as isophorone diisocyanate on the hydroxyl group of the epoxy acrylate resin.
- a polyfunctional epoxy resin such as a cresol novolac type epoxy resin
- a hydroxy acrylate such as pentaerythritol triacrylate
- a diisocyanate such as isophorone diisocyanate
- polyhydric acrylates such as polyhydric alcohols or their ethylene oxide adducts, propylene oxide adducts, or ⁇ -caprolactone adducts, and polyphenols such as ethylene oxide adducts or propylene oxide adducts of phenols are used.
- polyhydric acrylates such as polyhydric alcohols or their ethylene oxide adducts, propylene oxide adducts, or ⁇ -caprolactone adducts
- polyphenols such as ethylene oxide adducts or propylene oxide adducts of phenols
- the compounding amount of the compound having a plurality of ethylenically unsaturated groups in the molecule is 5 to 100 parts by mass, more preferably 5 to 70 parts by mass with respect to 100 parts by mass of the carboxyl group-containing urethane resin. It is a ratio.
- the blending amount is less than 5 parts by mass, photocurability is lowered, and pattern formation becomes difficult by alkali development after irradiation with active energy rays, which is not preferable.
- the amount exceeds 100 parts by mass the solubility in an alkaline aqueous solution is lowered, and the coating film becomes brittle.
- a filler can be blended as necessary in order to increase the physical strength of the coating film.
- known and commonly used inorganic or organic fillers can be used.
- barium sulfate, spherical silica and talc are preferably used.
- metal hydroxides such as titanium oxide and metal oxides can be used as extender pigment fillers.
- the amount of these fillers is preferably 300 parts by mass or less, more preferably 0.1 to 200 parts by mass, and particularly preferably 1 to 100 parts by mass with respect to 100 parts by mass of the carboxyl group-containing urethane resin.
- a binder polymer can be used for the purpose of improving dryness to touch and improving handling properties.
- polyester polymers, polyurethane polymers, polyester urethane polymers, polyamide polymers, polyester amide polymers, acrylic polymers, cellulose polymers, polylactic acid polymers, phenoxy polymers, and the like can be used.
- These binder polymers can be used alone or as a mixture of two or more.
- the photosensitive resin composition of the present invention can use an elastomer for the purpose of imparting flexibility and improving brittleness of the cured product.
- an elastomer for the purpose of imparting flexibility and improving brittleness of the cured product.
- a polyester elastomer, a polyurethane elastomer, a polyester urethane elastomer, a polyamide elastomer, a polyesteramide elastomer, an acrylic elastomer, or an olefin elastomer can be used.
- resins in which a part or all of epoxy groups of epoxy resins having various skeletons are modified with carboxylic acid-modified butadiene-acrylonitrile rubber at both ends can be used.
- epoxy-containing polybutadiene elastomers acrylic-containing polybutadiene elastomers, hydroxyl group-containing polybutadiene elastomers, hydroxyl group-containing isoprene elastomers and the like can also be used. These elastomers can be used alone or as a mixture of two or more.
- the photosensitive resin composition of the present invention may use an organic solvent for the synthesis of the carboxyl group-containing urethane resin and the preparation of the composition, or for adjusting the viscosity for application to a substrate or a carrier film.
- organic solvents include ketones, aromatic hydrocarbons, glycol ethers, glycol ether acetates, esters, alcohols, aliphatic hydrocarbons, petroleum solvents, and the like.
- ketones such as methyl ethyl ketone and cyclohexanone; aromatic hydrocarbons such as toluene, xylene and tetramethylbenzene; cellosolve, methyl cellosolve, butyl cellosolve, carbitol, methyl carbitol, butyl carbitol, propylene glycol monomethyl Glycol ethers such as ether, dipropylene glycol monomethyl ether, dipropylene glycol diethyl ether, triethylene glycol monoethyl ether; ethyl acetate, butyl acetate, dipropylene glycol methyl ether acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, Esters such as propylene glycol butyl ether acetate; ethanol, propano , Ethylene glycol, alcohols such as propylene glycol; octane
- the photosensitive resin composition of the present invention prevents oxidation.
- a radical scavenger that invalidates the generated radicals and / or an antioxidant such as a peroxide decomposer that decomposes the generated peroxide into harmless substances and prevents new radicals from being generated.
- an antioxidant is used in a composition that uses a butadiene-based elastomer used in the present invention, PCT resistance is improved, and peeling and discoloration during HAST are reduced, which is effective.
- antioxidant that acts as a radical scavenger
- hydroquinone 4-t-butylcatechol, 2-t-butylhydroquinone, hydroquinone monomethyl ether, 2,6-di-t-butyl-p- Cresol, 2,2-methylene-bis (4-methyl-6-tert-butylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3, 5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, 1,3,5-tris (3 ′, 5′-di-t-butyl-4) -Hydroxybenzyl) -S-triazine-2,4,6- (1H, 3H, 5H) trione and other phenolic compounds, quinone compounds such as metaquinone and benzoquinone, bis (2,2,6, - tetramethyl-4-piperidyl) -
- the radical scavenger may be commercially available, for example, ADK STAB (registered trademark) AO-30, ADK STAB AO-330, ADK STAB AO-20, ADK STAB LA-77, ADK STAB LA-57, ADK STAB LA-67, ADK STAB LA-68, ADK STAB LA-87 (trade name, manufactured by ADEKA Corporation), IRGANOX (registered trademark) 1010, IRGANOX 1035, IRGANOX 1076, IRGANOX 1135, TINUVIN (registered trademark) 111FDL, TINUVIN 123, TINUVIN 144, TINUVIN 152, TINUVIN 292, TINUVIN 5100 (trade name, manufactured by Ciba Japan Co., Ltd.) and the like.
- antioxidant that acts as a peroxide decomposer
- phosphorus compounds such as triphenyl phosphite, pentaerythritol tetralauryl thiopropionate, dilauryl thiodipropionate, distearyl 3,3 ′.
- -Sulfur compounds such as thiodipropionate.
- the peroxide decomposing agent may be commercially available, for example, Adeka Stub TPP (trade name, manufactured by ADEKA Corporation), Mark AO-412S (trade name, manufactured by Adeka Argus Chemical Co., Ltd.), Smizer ( Registered trademark) TPS (trade name, manufactured by Sumitomo Chemical Co., Ltd.), and the like.
- Said antioxidant can be used individually by 1 type or in combination of 2 or more types.
- the photosensitive resin composition of the present invention includes, in addition to the above antioxidant, in order to take a countermeasure against stabilization against ultraviolet rays. UV absorbers can be used.
- ultraviolet absorber examples include benzophenone derivatives, benzoate derivatives, benzotriazole derivatives, triazine derivatives, benzothiazole derivatives, cinnamate derivatives, anthranilate derivatives, dibenzoylmethane derivatives, and the like.
- benzophenone derivative examples include 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, and 2,4-dihydroxybenzophenone. Is mentioned.
- benzoate derivatives include 2-ethylhexyl salicylate, phenyl salicylate, pt-butylphenyl salicylate, 2,4-di-t-butylphenyl-3,5-di-t. -Butyl-4-hydroxybenzoate and hexadecyl-3,5-di-t-butyl-4-hydroxybenzoate.
- benzotriazole derivative examples include 2- (2′-hydroxy-5′-t-butylphenyl) benzotriazole, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2 -(2'-hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5 -Chlorobenzotriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t-amylphenyl) benzotriazole and the like.
- the triazine derivative include hydroxyphenyl triazine, bisethylhexyloxyphenol methoxyphenyl triazine, and the like.
- Ultraviolet absorbers may be commercially available, for example, TINUVIN PS, TINUVIN 99-2, TINUVIN 109, TINUVIN 384-2, TINUVIN 900, TINUVIN 928, TINUVIN 1130, TINUVIN 400, TINUVIN 405, TINUVIN 460, TINUVIN 479 (manufactured by Ciba Japan, trade name) and the like.
- Said ultraviolet absorber can be used individually by 1 type or in combination of 2 or more types, By using together with the said antioxidant, the molding obtained from the photosensitive resin composition of this invention can be stabilized. I can plan.
- N-phenylglycines phenoxyacetic acids, thiophenoxyacetic acids, mercaptothiazole and the like can be used as chain transfer agents in order to improve sensitivity.
- chain transfer agents include, for example, chain transfer agents having a carboxyl group such as mercaptosuccinic acid, mercaptoacetic acid, mercaptopropionic acid, methionine, cysteine, thiosalicylic acid and derivatives thereof; mercaptoethanol, mercaptopropanol, mercaptobutanol Chain transfer agents having a hydroxyl group such as 1-butanethiol, butyl-3-mercaptopropionate, methyl-3-mercaptopropionate, 2,2 -(Ethylenedioxy) diethanethiol, ethanethiol, 4-methylbenzenethiol, dodecyl mercaptan, propanethiol, butanethiol, pentanethiol, 1-octanethiol, cyclo Ntanchioru, cyclohexane thiol, thioglycerol, 4,4-thiobisbenzene
- Polyfunctional mercaptan compounds can be used and are not particularly limited.
- Aliphatic thiols such as xylylene dimercaptan, 4,4′-dimercaptodiphenyl sulfide, and aromatic thiols such as 1,4-benzenedithiol; ethylene glycol bis (mercaptoacetate), polyethylene glycol bis (mercaptoacetate), Propylene glycol bis (mercaptoacetate), glycerin tris (mercaptoacetate), trimethylol ethane tris (mercaptoacetate), trimethylolpropane tris (mercaptoacetate), pentaerythri Poly (mercaptoacetate) s of polyhydric alcohols such as tetrakis (mercaptoacetate) and dipent
- Examples of these commercially available products include BMPA, MPM, EHMP, NOMP, MBMP, STMP, TMMP, PEMP, DPMP, and TEMPIC (manufactured by Sakai Chemical Industry Co., Ltd.), Karenz (registered trademark) MT-PE1, Karenz MT-BD1, Karenz-NR1 (above, manufactured by Showa Denko KK) and the like can be mentioned.
- heterocyclic compound having a mercapto group acting as a chain transfer agent examples include mercapto-4-butyrolactone (also known as 2-mercapto-4-butanolide), 2-mercapto-4-methyl-4-butyrolactone, 2-mercapto.
- heterocyclic compound having a mercapto group which is a chain transfer agent that does not impair the developability of the photosensitive resin composition mercaptobenzothiazole, 3-mercapto-4-methyl-4H-1,2,4-triazole 5-methyl-1,3,4-thiadiazole-2-thiol and 1-phenyl-5-mercapto-1H-tetrazole are preferred.
- chain transfer agents can be used alone or in combination of two or more.
- an adhesion promoter can be used in order to improve adhesion between layers or adhesion between the photosensitive resin layer and the substrate.
- Specific examples include, for example, benzimidazole, benzoxazole, benzothiazole, 2-mercaptobenzoimidazole, 2-mercaptobenzoxazole, 2-mercaptobenzothiazole (trade name: Axel M manufactured by Kawaguchi Chemical Industry Co., Ltd.), 3-morpholinomethyl-1-phenyl-triazole-2-thione, 5-amino-3-morpholinomethyl-thiazole-2-thione, 2-mercapto-5-methylthio-thiadiazole, triazole, tetrazole, benzotriazole, carboxybenzotriazole Amino group-containing benzotriazole, silane coupling agents and the like.
- the photosensitive resin composition of the present invention may further contain a thixotropic agent such as finely divided silica, organic bentonite, montmorillonite, hydrotalcite, etc., if necessary.
- a thixotropic agent such as finely divided silica, organic bentonite, montmorillonite, hydrotalcite, etc.
- Organic bentonite and hydrotalcite are preferred as the thixotropic agent over time, and hydrotalcite is particularly excellent in electrical characteristics.
- thermal polymerization inhibitors silicone-based, fluorine-based, polymer-based antifoaming agents and / or leveling agents, imidazole-based, thiazole-based, triazole-based silane coupling agents, rust preventives, and bisphenols
- Known and conventional additives such as copper damage prevention agents such as those based on triazine and triazine thiols can be blended.
- the thermal polymerization inhibitor can be used to prevent thermal polymerization or temporal polymerization of the polymerizable compound.
- the thermal polymerization inhibitor include 4-methoxyphenol, hydroquinone, alkyl or aryl-substituted hydroquinone, t-butylcatechol, pyrogallol, 2-hydroxybenzophenone, 4-methoxy-2-hydroxybenzophenone, cuprous chloride, phenothiazine, Chloranil, naphthylamine, ⁇ -naphthol, 2,6-di-tert-butyl-4-cresol, 2,2′-methylenebis (4-methyl-6-tert-butylphenol), pyridine, nitrobenzene, dinitrobenzene, picric acid, 4-Toluidine, methylene blue, copper and organic chelating agent reactant, methyl salicylate, and phenothiazine, nitroso compound, chelate of nitroso compound and Al, and the like.
- the photosensitive resin composition of the present invention is adjusted to a viscosity suitable for the coating method with, for example, the organic solvent, and on the substrate, a dip coating method, a flow coating method, a roll coating method, a bar coater method, a screen printing method,
- a tack-free coating film can be formed by applying the organic solvent contained in the composition at a temperature of about 60 to 100 ° C. and performing volatile drying (temporary drying) at a temperature of about 60 to 100 ° C. Thereafter, the contact pattern (or non-contact pattern) is selectively exposed with an active energy ray through a photomask on which a pattern is formed, or directly exposed with a pattern using a laser direct exposure machine.
- a resist pattern is formed by development with a 3 to 3% sodium carbonate aqueous solution.
- a composition containing a thermosetting component for example, by heating to a temperature of about 140 to 180 ° C. and thermosetting, the carboxyl group of the carboxyl group-containing urethane resin and a plurality of molecules in the molecule
- a thermosetting component having a cyclic ether group and / or a cyclic thioether group reacts to form a cured coating film excellent in various properties such as heat resistance, chemical resistance, moisture absorption resistance, adhesion, and electrical characteristics. it can.
- thermosetting even when it does not contain a thermosetting component, by performing heat treatment, the ethylenically unsaturated bond of the photocurable component remaining in an unreacted state at the time of exposure undergoes thermal radical polymerization, and the coating film characteristics are improved. Therefore, heat treatment (thermosetting) may be performed depending on the purpose and application.
- the base material examples include printed circuit boards and flexible printed circuit boards that are pre-formed with a circuit, paper-phenol resin, paper-epoxy resin, glass cloth-epoxy resin, glass-polyimide, glass cloth / non-woven cloth-epoxy resin. , Glass cloth / paper-epoxy resin, synthetic fiber-epoxy resin, copper-clad laminates of all grades (FR-4 etc.) using polyimide, polyethylene, PPO, cyanate ester, etc., polyimide film, PET A film, a glass substrate, a ceramic substrate, a wafer plate, or the like can be used.
- Volatile drying performed after applying the photosensitive resin composition of the present invention is performed in a dryer using a hot air circulation drying oven, an IR oven, a hot plate, a convection oven or the like (equipped with a heat source of an air heating method using steam). It is possible to use a method in which hot air is brought into countercurrent contact and a method in which a hot air is blown onto a support.
- the obtained coating film is exposed (irradiated with active energy rays).
- the exposed portion (the portion irradiated by the active energy ray) is cured.
- a direct drawing apparatus for example, a laser direct imaging apparatus that directly draws an image with a laser using CAD data from a computer
- an exposure apparatus equipped with a metal halide lamp and an (ultra) high pressure mercury lamp.
- either a gas laser or a solid laser may be used as long as laser light having a maximum wavelength in the range of 350 to 410 nm is used.
- the exposure amount varies depending on the film thickness and the like, but is generally 5 to 300 mJ / cm 2 , preferably 5 to 200 mJ / cm 2 .
- the direct drawing apparatus for example, those manufactured by Nippon Orbotech, Pentax, etc. can be used, and any apparatus may be used as long as it oscillates laser light having a maximum wavelength of 350 to 410 nm. .
- the developing method can be a dipping method, a shower method, a spray method, a brush method or the like, and as a developer, potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium phosphate, sodium silicate, Alkaline aqueous solutions such as ammonia and amines can be used.
- the photosensitive resin composition of the present invention is used in the form of a dry film having a solder resist layer formed by previously applying a solder resist on a film of polyethylene terephthalate or the like in addition to a method of directly applying to a substrate in a liquid state. You can also The case where the photosensitive resin composition of this invention is used as a dry film is shown below.
- the dry film has a structure in which a carrier film, a solder resist layer, and a peelable cover film used as necessary are laminated in this order.
- the solder resist layer is a layer obtained by applying and drying an alkali-developable photosensitive resin composition on a carrier film or a cover film. After forming a solder resist layer on the carrier film, a cover film is laminated thereon, or a solder resist layer is formed on the cover film, and this laminate is laminated on the carrier film to obtain a dry film.
- thermoplastic film such as a polyester film having a thickness of 2 to 150 ⁇ m is used.
- the solder resist layer is formed by uniformly applying an alkali-developable photosensitive resin composition to a carrier film or cover film with a thickness of 10 to 150 ⁇ m using a blade coater, lip coater, comma coater, film coater, and the like, and then drying. .
- cover film a polyethylene film, a polypropylene film or the like can be used, but it is preferable that the adhesive force with the solder resist layer is smaller than that of the carrier film.
- a protective film permanent protective film
- peel off the cover film layer the solder resist layer and the substrate on which the circuit is formed, and bond them together using a laminator, etc.
- a solder resist layer is formed on the formed substrate. If the formed solder resist layer is exposed, developed, and heat cured in the same manner as described above, a cured coating film can be formed.
- the carrier film may be peeled off either before exposure or after exposure.
- Synthesis example 1 In a flask equipped with a stirrer and a reflux tube, as an epoxy resin having a plurality of epoxy groups in one molecule, 300.0 g of NC-3000 (epoxy equivalent 255 g / eq.) Manufactured by Nippon Kayaku Co., Ltd.
- the carboxyl group-containing resin used in Comparative Example 1 is a carboxyl group-containing photosensitive resin containing a photosensitive group and using a polyfunctional epoxy having a bisphenol F structure.
- Varnish 3 The carboxyl group-containing resin used in Comparative Example 2 is a photosensitive carboxyl group-containing resin that contains a photosensitive group-containing polyfunctional epoxy having a bisphenol structure. ZCR-1601 (solid content 65%) manufactured by Nippon Kayaku Co., Ltd. The acid value as a resin is 98 mgKOH / g).
- Varnish 4 The carboxyl group-containing resin used in Comparative Example 3 is a photosensitive carboxyl group-containing resin containing a photosensitive group and having a urethane structure.
- Preparation of aluminum hydroxide slurry 700 g of aluminum hydroxide (Heidilite 42M manufactured by Showa Denko KK), 295 g of carbitoacetate as a solvent, and 5 g of a wet dispersant were mixed and stirred, and dispersion treatment was performed using 0.5 ⁇ m zirconia beads in a bead mill. This was repeated three times to produce an aluminum hydroxide slurry that passed through a 3 ⁇ m filter.
- silica slurry 700 g of true spherical silica (SO-E2 manufactured by Admatech Co., Ltd.), 295 g of carbitol acetate as a solvent, and 5 g of a vinyl silane coupling agent as a silane coupling agent were mixed and stirred, and subjected to a dispersion treatment in the same manner as described above. This was repeated three times to produce a silica slurry filtered through a 3 ⁇ m filter.
- Examples 1 to 14 and Comparative Examples 1 to 3 Using the resin solution of the above synthesis example, the various components shown in Tables 1 and 2 are blended in the proportions (parts by mass) shown in Tables 1 and 2, premixed with a stirrer, and then kneaded with a three-roll mill. Then, a photosensitive resin composition for solder resist was prepared. Here, it was 15 micrometers or less when the dispersion degree of the obtained photosensitive resin composition was evaluated by the particle size measurement by the grindometer by Eriksen.
- Optimal exposure The photosensitive resin compositions of Examples 1 to 14 and Comparative Examples 1 to 3 were coated on the entire surface by a screen printing method after the circuit pattern substrate having a copper thickness of 18 ⁇ m was polished by buffing, washed with water, dried, and then applied at 80 ° C. For 30 minutes in a hot air circulation drying oven. After drying, exposure is performed through a step tablet (Kodak No. 2) using an exposure apparatus (HMW-680-GW20) equipped with a metal halide lamp, and development (30 ° C., 0.2 MPa, 1 wt% Na 2 CO 3 aqueous solution) When the pattern of the step tablet remaining when performing for 60 seconds was 6 steps, the optimum exposure amount was set.
- compositions of Examples 1 to 14 and Comparative Examples 1 to 3 were screen printed on a polyimide film substrate on which a circuit pattern was formed or on Kapton 100H (a polyimide film manufactured by Toray DuPont Co., Ltd., thickness 25 ⁇ m). The whole surface was applied, dried at 80 ° C. for 30 minutes, and allowed to cool to room temperature. The obtained substrate is exposed to a solder resist pattern at an optimum exposure amount using an exposure apparatus (HMW-680-GW20) equipped with a metal halide lamp, and a 1 wt% Na 2 CO 3 aqueous solution at 30 ° C. is sprayed at a pressure of 0.2 MPa. Was developed for 60 seconds to obtain a resist pattern. This substrate was cured by heating at 150 ° C. for 60 minutes. The characteristics of the obtained printed circuit board (evaluation board) were evaluated as follows.
- ⁇ Solder heat resistance> Applying rosin-based flux to a characteristic evaluation board prepared on a polyimide film substrate on which a circuit pattern is formed, immersing it in a solder bath set in advance at 260 ° C., washing the flux with denatured alcohol, and then visually expanding the resist layer ⁇ Evaluated for peeling.
- the judgment criteria are as follows. ⁇ : No peeling is observed after one immersion for 10 seconds. (Triangle
- ⁇ Electroless gold plating resistance> Using a commercially available electroless nickel plating bath and electroless gold plating bath, plating is performed under the conditions of nickel 3 ⁇ m and gold 0.03 ⁇ m, and the presence or absence of resist layer peeling or plating solution penetration by tape peeling Then, the presence or absence of peeling of the resist layer was evaluated by tape peeling. The judgment criteria are as follows. ⁇ : Infiltration and peeling are not seen. ⁇ : Slight penetration is observed after plating, but does not peel off after tape peeling. X: There is peeling after plating.
- ⁇ Low warpage> The cured film produced on Kapton 100H was cut out to 50 ⁇ 50 mm, and the four corners were measured to obtain an average value and evaluated according to the following criteria.
- the obtained double-side coated substrate was exposed to the entire surface of the solder resist with an optimum exposure amount using an exposure apparatus (HMW-680-GW20) equipped with a metal halide lamp, and a 1 wt% Na 2 CO 3 aqueous solution at 30 ° C. was sprayed to 0.2 MPa. Development was performed for 60 seconds under the conditions, and then heat curing was performed at 150 ° C. for 60 minutes to obtain an evaluation sample. This flame retardant evaluation sample was subjected to a thin material vertical combustion test based on the UL94 standard. The evaluation was expressed as VTM-0 or VTM-1 based on the UL94 standard.
- Examples 15-28 The composition excluding the silicone antifoaming agents of Examples 1 to 14 was diluted with methyl ethyl ketone, applied onto a PET film, and dried at 80 ° C. for 30 minutes to form a photosensitive resin composition layer having a thickness of 20 ⁇ m. did. Further, a cover film was laminated thereon to produce a dry film, which were designated as Examples 15 to 28, respectively. The cover film was peeled off from the obtained dry film, the film was heat-laminated on the patterned copper foil substrate, and then exposed under the same conditions as the substrate used for the coating film property evaluation of the above Examples. After the exposure, the carrier film was peeled off, and a 1 wt% Na 2 CO 3 aqueous solution at 30 ° C.
- the photosensitive resin composition of the present invention not only achieves both solder heat resistance and electroless gold plating resistance that are in a trade-off relationship with low warpage. It has become possible to achieve excellent bendability and even flame retardancy.
- the photosensitive resin composition for printed wiring boards of the present invention capable of alkali development has a non-halogen composition, has a low environmental impact, is flame retardant, has low warpage, and has excellent bendability. Therefore, the printed wiring board, particularly TAB (tape automated) -Optimal as a solder resist for flexible printed circuit boards (FPC) represented by ponding and COF (chip-on-film).
- TAB tape automated
- COF chip-on-film
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Abstract
Description
一方、ハロゲンフリーで難燃性のソルダーレジストとしては、例えば、特開2007-41107号公報(特許文献2)には、ビフェニルノボラック型エポキシ樹脂と不飽和モノカルボン酸との反応生成物に多塩基酸無水物を付加させて得られるアルカリ水溶液可溶性樹脂、硬化剤としてのビフェニルノボラック型エポキシ樹脂及び光重合開始剤を含有するアルカリ水溶液可溶性感光性樹脂組成物が提案されているが、低反り及び屈曲性に関しては充分ではなかった。
さらに本発明の目的は、かかる感光性樹脂組成物を用いることによって、低反りで難燃性や折り曲げ性等の諸特性に優れたドライフィルム及びこのような優れた特性の難燃性皮膜を有するプリント配線板を提供することにある。
以下、本発明の感光性樹脂組成物の各構成成分について詳しく説明する。
上記ビフェニルノボラック構造を有するエポキシ樹脂は、NC-3000(日本化薬(株)製)として市販されている。
なお、本明細書において、(メタ)アクリレートとは、アクリレート、メタクリレート及びそれらの混合物を総称する用語で、他の類似の表現についても同様である。
また、上記反応における各成分の割合(原料の仕込み割合)は、ビフェニルノボラック構造を有するエポキシ樹脂のエポキシ基1当量に対して、一塩基酸の酸基が1.0~1.2当量となる割合が好ましい。
このような光重合開始剤、光開始助剤、及び増感剤の総量は、前記ビフェニルノボラック構造を有するカルボキシル基含有ウレタン樹脂100質量部に対して35質量部以下であることが好ましい。35質量部を超えると、これらの光吸収により深部硬化性が低下する傾向にある。
また、アシルホスフィンオキサイド系光重合開始剤の使用は、光反応時の深部硬化性を向上させ、更に光照射により開裂した開始剤由来リン含有化合物成分が硬化物ネットワークに組み込まれることにより、硬化塗膜中のリン濃度を効果的に高めることができ、更なる難燃性の向上を可能とする。
上記熱硬化性成分は単独で又は2種以上を併用することができる。
このような1分子中に複数のイソシアネート基又はブロック化イソシアネート基を有する化合物の配合量は、前記カルボキシル基含有ウレタン樹脂100質量部に対して、1~100質量部、より好ましくは、2~70質量部の割合が適当である。前記配合量が、1質量部未満の場合、十分な塗膜の強靭性が得られず、好ましくない。一方、100質量部を超えた場合、保存安定性が低下するので好ましくない。
赤色着色剤としてはモノアゾ系、ジズアゾ系、アゾレーキ系、ベンズイミダゾロン系、ペリレン系、ジケトピロロピロール系、縮合アゾ系、アントラキノン系、キナクリドン系などがあり、具体的には以下のものが挙げられる。
モノアゾ系:Pigment Red 1, 2, 3, 4, 5, 6, 8, 9, 12, 14, 15, 16, 17, 21, 22, 23, 31, 32, 112, 114, 146, 147, 151, 170, 184, 187, 188, 193, 210, 245, 253, 258, 266, 267, 268, 269。
ジスアゾ系:Pigment Red 37, 38, 41。
モノアゾレーキ系:Pigment Red 48:1, 48:2, 48:3, 48:4, 49:1, 49:2, 50:1, 52:1, 52:2, 53:1, 53:2, 57:1, 58:4, 63:1, 63:2, 64:1,68。
ベンズイミダゾロン系:Pigment Red 171、Pigment Red 175、Pigment Red 176、Pigment Red 185、Pigment Red 208。
ぺリレン系:Solvent Red 135、Solvent Red 179、Pigment Red 123、Pigment Red 149、Pigment Red 166、Pigment Red 178、Pigment Red 179、Pigment Red 190、Pigment Red 194、Pigment Red 224。
ジケトピロロピロール系:Pigment Red 254、Pigment Red 255、Pigment Red 264、Pigment Red 270、Pigment Red 272。
縮合アゾ系:Pigment Red 220、Pigment Red 144、Pigment Red 166、Pigment Red 214、Pigment Red 220、Pigment Red 221、Pigment Red 242。
アンスラキノン系:Pigment Red 168、Pigment Red 177、Pigment Red 216、Solvent Red 149、Solvent Red 150、Solvent Red 52、Solvent Red 207。
キナクリドン系:Pigment Red 122、Pigment Red 202、Pigment Red 206、Pigment Red 207、Pigment Red 209。
青色着色剤としてはフタロシアニン系、アントラキノン系があり、顔料系はピグメント(Pigment)に分類されている化合物、具体的には:Pigment Blue 15、Pigment Blue 15:1、Pigment Blue 15:2、Pigment Blue 15:3、Pigment Blue 15:4、Pigment Blue 15:6、Pigment Blue 16、Pigment Blue 60。
染料系としては、Solvent Blue 35、Solvent Blue 63、Solvent Blue 68、Solvent Blue 70、Solvent Blue 83、Solvent Blue 87、Solvent Blue 94、Solvent Blue 97、Solvent Blue 122、Solvent Blue 136、Solvent Blue 67、Solvent Blue 70等を使用することができる。上記以外にも、金属置換もしくは無置換のフタロシアニン化合物も使用することができる。
緑色着色剤としては、同様にフタロシアニン系、アントラキノン系、ペリレン系があり、具体的にはPigment Green 7、Pigment Green 36、Solvent Green 3、Solvent Green 5、Solvent Green 20、Solvent Green 28等を使用することができる。上記以外にも、金属置換もしくは無置換のフタロシアニン化合物も使用することができる。
黄色着色剤としてはモノアゾ系、ジスアゾ系、縮合アゾ系、ベンズイミダゾロン系、イソインドリノン系、アントラキノン系等があり、具体的には以下のものが挙げられる。
アントラキノン系:Solvent Yellow 163、Pigment Yellow 24、Pigment Yellow 108、Pigment Yellow 193、Pigment Yellow 147、Pigment Yellow 199、Pigment Yellow 202。
イソインドリノン系:Pigment Yellow 110、Pigment Yellow 109、Pigment Yellow 139、Pigment Yellow 179、Pigment Yellow 185。
縮合アゾ系:Pigment Yellow 93、Pigment Yellow 94、Pigment Yellow 95、Pigment Yellow 128、Pigment Yellow 155、Pigment Yellow 166、Pigment Yellow 180。
ベンズイミダゾロン系:Pigment Yellow 120、Pigment Yellow 151、Pigment Yellow 154、Pigment Yellow 156、Pigment Yellow 175、Pigment Yellow 181。
モノアゾ系:Pigment Yellow 1, 2, 3, 4, 5, 6, 9, 10, 12, 61, 62, 62:1, 65, 73, 74, 75, 97, 100, 104, 105, 111, 116, 167, 168, 169, 182, 183。
ジスアゾ系:Pigment Yellow 12, 13, 14, 16, 17, 55, 63, 81, 83, 87, 126, 127, 152, 170, 172, 174, 176, 188, 198。
具体的に例示すれば、Pigment Violet 19、23、29、32、36、38、42、Solvent Violet 13、36、C.I.ピグメントオレンジ1、C.I.ピグメントオレンジ5、C.I.ピグメントオレンジ13、C.I.ピグメントオレンジ14、C.I.ピグメントオレンジ16、C.I.ピグメントオレンジ17、C.I.ピグメントオレンジ24、C.I.ピグメントオレンジ34、C.I.ピグメントオレンジ36、C.I.ピグメントオレンジ38、C.I.ピグメントオレンジ40、C.I.ピグメントオレンジ43、C.I.ピグメントオレンジ46、C.I.ピグメントオレンジ49、C.I.ピグメントオレンジ51、C.I.ピグメントオレンジ61、C.I.ピグメントオレンジ63、C.I.ピグメントオレンジ64、C.I.ピグメントオレンジ71、C.I.ピグメントオレンジ73、C.I.ピグメントブラウン23、C.I.ピグメントブラウン25、C.I.ピグメントブラック1、C.I.ピグメントブラック7等がある。
このような有機溶剤としては、ケトン類、芳香族炭化水素類、グリコールエーテル類、グリコールエーテルアセテート類、エステル類、アルコール類、脂肪族炭化水素、石油系溶剤などが挙げることができる。より具体的には、メチルエチルケトン、シクロヘキサノン等のケトン類;トルエン、キシレン、テトラメチルベンゼン等の芳香族炭化水素類;セロソルブ、メチルセロソルブ、ブチルセロソルブ、カルビトール、メチルカルビトール、ブチルカルビトール、プロピレングリコールモノメチルエーテル、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールジエチルエーテル、トリエチレングリコールモノエチルエーテル等のグリコールエーテル類;酢酸エチル、酢酸ブチル、ジプロピレングリコールメチルエーテルアセテート、プロピレングリコールメチルエーテルアセテート、プロピレングリコールエチルエーテルアセテート、プロピレングリコールブチルエーテルアセテートなどのエステル類;エタノール、プロパノール、エチレングリコール、プロピレングリコール等のアルコール類;オクタン、デカン等の脂肪族炭化水素;石油エーテル、石油ナフサ、水添石油ナフサ、ソルベントナフサ等の石油系溶剤などである。このような有機溶剤は、単独で又は2種以上の混合物として用いられる。
上記の酸化防止剤は、1種を単独で又は2種以上を組み合わせて用いることができる。
上記活性エネルギー線照射に用いられる露光機としては、直接描画装置(例えばコンピューターからのCADデータにより直接レーザーで画像を描くレーザーダイレクトイメージング装置)、メタルハライドランプを搭載した露光機、(超)高圧水銀ランプを搭載した露光機、水銀ショートアークランプを搭載した露光機、もしくは(超)高圧水銀ランプなどの紫外線ランプを使用した直接描画装置を用いることができる。活性エネルギー線としては、最大波長が350~410nmの範囲にあるレーザー光を用いていればガスレーザー、固体レーザーどちらでもよい。また、その露光量は膜厚等によって異なるが、一般には5~300mJ/cm2、好ましくは5~200mJ/cm2である。上記直接描画装置としては、例えば日本オルボテック社製、ペンタックス社製等のものを使用することができ、最大波長が350~410nmのレーザー光を発振する装置であればいずれの装置を用いてもよい。
攪拌装置、還流管をつけたフラスコ中に、1分子中に複数のエポキシ基を有するエポキシ樹脂として、日本化薬(株)製 NC-3000(エポキシ当量255g/eq.)を300.0g、分子中にエチレン性不飽和基を有するモノカルボン酸としてアクリル酸を84.7g、熱重合禁止剤として2,6ージターシャリーブチルー4ーメチルフェノールを1.8g、反応触媒としてトリフェニルホスフィンを1.8g、反応溶媒としてプロピレングリコールモノメチルエーテルアセテート(PGMEA)207.2gを仕込み、反応温度98℃にて反応液酸価が1mgKOH/g以下になるまで反応させ、水酸基含有エポキシカルボキシレート化合物を得た。
次いで、得られた水酸基含有エポキシカルボキシレート化合物含有の反応液335.5g、カルボキシル基含有ジオール化合物としてジメチロールブタン酸60.7g、脂肪族系ジイソシアネート化合物として2,4,4-トリメチルヘキサメチレンジイソシアネート104.1g、反応溶剤としてPGMEA 88.7gを仕込み、反応温度80℃で反応させ、NCO含有量が0.1%以下となったところを反応の終点とし、ビフェニル骨格を有するカルボキシル基含有ウレタン樹脂を得た(以下、ワニス1という)。固形分65%樹脂としての酸価は60mgKOH/gであった。
比較例1に用いたカルボキシル基含有樹脂は、感光性基含有でビスフェノールF構造の多官能エポキシを使用したカルボキシル基含有感光性樹脂であり、日本化薬(株)製ZFR-1124(固形分63%、樹脂としての酸価は102mgKOH/g)である。
比較例2に用いたカルボキシル基含有樹脂は、感光性基含有でビスフェノール構造の多官能エポキシを使用した感光性カルボキシル基含有樹脂であり、日本化薬(株)製ZCR-1601(固形分65%、樹脂としての酸価は98mgKOH/g)である。
比較例3に用いたカルボキシル基含有樹脂は、感光性基含有でウレタン構造を持つ感光性カルボキシル基含有樹脂であり、共栄社化学(株)製P7B-53(固形分53%、樹脂としての酸価は49mgKOH/g)である。
水酸化アルミニウム(昭和電工(株)製ハイジライト42M)700gと、溶剤としてカルビトーアセテート295g、湿潤分散剤5gを混合攪拌し、ビーズミルにて0.5μmのジルコニアビーズを用い分散処理を行った。これを3回繰り返して3μmのフィルターを通した水酸化アルミニウムスラリーを作製した。
真球状シリカ(アドマテック社製SO-E2)700g、溶剤としてカルビトールアセテート295g、シランカップリング剤としてビニルシランカップリング剤5gを混合攪拌したものを、上記と同じくビーズミルで分散処理を行った。これを3回繰り返して3μmフィルターでろ過したシリカスラリーを作製した。
上記合成例の樹脂溶液を用い、表1及び表2に示す種々の成分とともに表1及び表2に示す割合(質量部)にて配合し、攪拌機にて予備混合した後、3本ロールミルで混練し、ソルダーレジスト用感光性樹脂組成物を調製した。ここで、得られた感光性樹脂組成物の分散度をエリクセン社製グラインドメータによる粒度測定にて評価したところ、15μm以下であった。
上記実施例1~14及び比較例1~3の感光性樹脂組成物を、銅厚18μmの回路パターン基板をバフロール研磨後、水洗し、乾燥してからスクリーン印刷法により全面に塗布し、80℃の熱風循環式乾燥炉で30分間乾燥させた。乾燥後、メタルハライドランプ搭載の露光装置(HMW-680-GW20)を用いてステップタブレット(Kodak No.2)を介して露光し、現像(30℃、0.2MPa、1wt%Na2CO3水溶液)を60秒で行った際残存するステップタブレットのパターンが6段の時を最適露光量とした。
上記実施例1~14及び比較例1~3の各組成物を、回路パターン形成されたポリイミドフィルム基板上、又はカプトン100H(東レ・デュポン(株)製ポリイミドフィルム、厚さ25μm)上にスクリーン印刷で全面塗布し、80℃で30分乾燥し、室温まで放冷した。得られた基板にメタルハライドランプ搭載の露光装置(HMW-680-GW20)を用いて最適露光量でソルダーレジストパターンを露光し、30℃の1wt%Na2CO3水溶液をスプレー圧0.2MPaの条件で60秒間現像を行い、レジストパターンを得た。この基板を、150℃で60分加熱して硬化した。得られたプリント基板(評価基板)に対して以下のように特性を評価した。
回路パターン形成されたポリイミドフィルム基板上に作製した特性評価基板にロジン系フラックスを塗布し、予め260℃に設定したはんだ槽に浸漬し、変性アルコールでフラックスを洗浄した後、目視によるレジスト層の膨れ・剥がれについて評価した。判定基準は以下のとおりである。
○:10秒間浸漬を1回で剥がれが認められない。
△:5秒間浸漬を1回で剥がれが認められない。
×:5秒間浸漬を1回でレジスト層に膨れ、剥がれがある。
市販品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3μm、金0.03μmの条件でめっきを行い、テープピーリングにより、レジスト層の剥がれの有無やめっき液のしみ込みの有無を評価した後、テープピーリングによりレジスト層の剥がれの有無を評価した。判定基準は以下のとおりである。
○:染み込み、剥がれが見られない。
△:めっき後に少し染み込みが確認されるが、テープピール後は剥がれない。
×:めっき後に剥がれが有る。
カプトン100H上に作製した硬化被膜を50×50mmに切り出し、4角の反りを測定して平均値を求め、以下の基準で評価した。
○:反りが0~3mm未満であるもの。
△:反りが3mm以上、7mm未満であるもの。
×:反りが7mm以上であるもの。
カプトン100H上に作製した硬化被膜を用いてはぜ折りを行い、クラックの入る手前の回数を記録した。
各実施例及び比較例の組成物を、25μm厚のポリイミドフィルム(カプトン100H)及び12.5μm厚のポリイミドフィルム(カプトン50H)にスクリーン印刷で全面塗布し、80℃で20分乾燥して室温まで放冷した。さらに裏面を同様にスクリーン印刷で全面塗布し、80℃で20分乾燥して室温まで放冷し、両面塗布基板を得た。得られた両面塗布基板にメタルハライドランプ搭載の露光装置(HMW-680-GW20)を用いて最適露光量でソルダーレジストを全面露光し、30℃の1wt%Na2CO3水溶液をスプレー圧0.2MPaの条件で60秒間現像を行い、次いで150℃で60分間熱硬化を行い、評価サンプルとした。この難燃性評価用サンプルついて、UL94規格に準拠した薄材垂直燃焼試験を行った。評価はUL94規格に基づいて、VTM-0又はVTM-1と表した。
従って、本発明によれば、低そり性、折り曲げ性、難燃性の全てを兼ね備えた感光性樹脂組成物が得られることがわかる。
前記実施例1~14のシリコーン系消泡剤を除いた組成物をメチルエチルケトンで希釈し、PETフィルム上に塗布して80℃で30分乾燥し、厚さ20μmの感光性樹脂組成物層を形成した。さらにその上にカバーフィルムを貼り合わせてドライフィルムを作製し、それぞれ実施例15~28とした。得られたドライフィルムからカバーフィルムを剥がし、パターン形成された銅箔基板に、フィルムを熱ラミネートし、次いで、前記実施例の塗膜特性評価に用いた基板と同様の条件で露光した。露光後、キャリアフィルムを剥がし、30℃の1wt%Na2CO3水溶液をスプレー圧0.2MPaの条件で60秒間現像を行い、レジストパターンを得た。この基板を150℃で60分加熱して硬化し、得られた硬化皮膜を有する試験基板について、前述した試験方法及び評価方法にて、各特性の評価試験を行った。その結果を表5に示す。
Claims (6)
- ビフェニルノボラック構造を有するカルボキシル基含有ウレタン樹脂、
光重合開始剤、
水酸化アルミニウム及び/又はリン含有化合物
を含有することを特徴とするアルカリ現像可能なプリント配線板用感光性樹脂組成物。 - 前記カルボキシル基含有ウレタン樹脂が、ビフェニルノボラック構造を有するエポキシ樹脂に一塩基酸を反応させて得られるジオール化合物と、カルボキシル基を有するジオール化合物と、ジイソシアネート化合物とを反応させることにより得られるカルボキシル基含有ウレタン樹脂であることを特徴とする請求項1に記載の感光性樹脂組成物。
- 前記光重合開始剤が、オキシムエステル化合物を含むことを特徴とする請求項1に記載の感光性樹脂組成物。
- さらに熱硬化性成分を含有することを特徴とする請求項1に記載の感光性樹脂組成物。
- 請求項1乃至4のいずれか一項に記載の感光性樹脂組成物をフィルムに塗布乾燥して得られるドライフィルム。
- 請求項1乃至4のいずれか一項に記載の感光性樹脂組成物を基材上に塗布して形成した塗膜、又は前記感光性樹脂組成物をフィルムに塗布乾燥して得られるドライフィルムを基材上にラミネートし形成した塗膜を、パターン状に光硬化させて得られる硬化皮膜を有するプリント配線板。
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Also Published As
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TWI499607B (zh) | 2015-09-11 |
CN102656518B (zh) | 2014-05-28 |
TW201136965A (en) | 2011-11-01 |
JP2011123420A (ja) | 2011-06-23 |
US20120250268A1 (en) | 2012-10-04 |
CN102656518A (zh) | 2012-09-05 |
KR101322582B1 (ko) | 2013-10-28 |
US8962712B2 (en) | 2015-02-24 |
JP5415923B2 (ja) | 2014-02-12 |
KR20120086723A (ko) | 2012-08-03 |
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