WO2011010459A1 - 光硬化性樹脂組成物 - Google Patents
光硬化性樹脂組成物 Download PDFInfo
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- WO2011010459A1 WO2011010459A1 PCT/JP2010/004673 JP2010004673W WO2011010459A1 WO 2011010459 A1 WO2011010459 A1 WO 2011010459A1 JP 2010004673 W JP2010004673 W JP 2010004673W WO 2011010459 A1 WO2011010459 A1 WO 2011010459A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0388—Macromolecular compounds which are rendered insoluble or differentially wettable with ethylenic or acetylenic bands in the side chains of the photopolymer
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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
- G03F7/20—Exposure; Apparatus therefor
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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
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2014—Contact or film exposure of light sensitive plates such as lithographic plates or circuit boards, e.g. in a vacuum frame
- G03F7/2016—Contact mask being integral part of the photosensitive element and subject to destructive removal during post-exposure processing
- G03F7/202—Masking pattern being obtained by thermal means, e.g. laser ablation
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
Definitions
- the present invention relates to a photocurable resin composition used as, for example, a solder resist for a printed wiring board.
- the photo-curable resin composition can be finely processed by applying the principle of photolithography. Furthermore, since a cured product having excellent physical properties can be obtained, it is used in electronic devices and printing plates.
- the photo-curable resin composition includes a solvent development type and an alkali development type.
- an alkali development type that can be developed with a dilute weak alkaline aqueous solution has become mainstream from the viewpoint of environmental measures.
- an alkali development type photocurable resin composition is used in printed wiring board manufacture, liquid crystal display board manufacture, or printing plate making.
- the cured product when used as a solder resist in the manufacture of printed wiring boards, the cured product has heat resistance that can withstand processing under high temperature conditions such as soldering, reliability such as electroless gold plating resistance, electrical characteristics, and PCT resistance.
- a photo-curable resin composition that satisfies the requirements for migration and satisfies the migration resistance and thermal cycle resistance to some extent as cured products
- carboxyl group-containing epoxy (meth) acrylates polyfunctional epoxy resins and (meth) acrylates are used.
- a photocurable resin composition in which a number of double bonds are introduced into the resin skeleton is used. With such a configuration, it is considered that the crosslink density can be increased, and heat resistance and dimensional stability can be improved.
- a resin composition with higher sensitivity has been demanded in order to increase the size of a substrate to be applied or to further improve productivity.
- a polymer compound having a radically polymerizable vinyl group in the side chain is capable of high-speed curing because of a crosslinking reaction caused by polymerization of the side chain vinyl group, and can be expected to improve sensitivity (for example, Patent Document 2). reference).
- Patent Document 2 Patent Document 2
- compatibility with alkali developability is difficult.
- the present invention has sensitivity equal to or higher than that of the prior art and alkali developability, and the cured product does not exhibit brittleness due to temperature change, and is excellent in reliability such as water resistance, electrical insulation, PCT resistance, etc. It aims at providing a photocurable resin composition.
- a photocurable resin composition comprising a carboxyl group-containing resin, a photopolymerization initiator, a vinyl group-containing elastomer, and a styryl group-containing compound.
- the photocurable resin composition of one embodiment of the present invention preferably further contains a mercapto compound. With such a configuration, the adhesion can be improved.
- the carboxyl group-containing resin preferably has a photosensitive group.
- the photocurability of the photocurable resin composition increases, and the sensitivity can be improved.
- the photopolymerization initiator is an oxime ester photopolymerization initiator represented by the following general formula (I), and an amino represented by the following general formula (II). It is preferably a mixture of an acetophenone photopolymerization initiator and one or more photopolymerization initiators selected from the group consisting of acylphosphine oxide photopolymerization initiators represented by the following general formula (III).
- R 1 represents a hydrogen atom, a phenyl group (which may be substituted with an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a halogen atom), an alkyl group having 1 to 20 carbon atoms (one or more). Or a cycloalkyl group having 5 to 8 carbon atoms, an alkanoyl group having 2 to 20 carbon atoms, or benzoyl.
- R 2 is a phenyl group (substituted with an alkyl group having 1 to 6 carbon atoms, a phenyl group or a halogen atom).
- an alkyl group having 1 to 20 carbon atoms (which may be substituted with one or more hydroxyl groups, and may have one or more oxygen atoms in the middle of the alkyl chain), carbon number 5 -8 cycloalkyl groups,
- R 3 and R 4 are each independently 1 to 12 carbon atoms
- R 5 and R 6 each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a cyclic alkyl ether group in which two are bonded
- R 7 and R 8 Each independently represents a linear or branched alkyl group having 1 to 10 carbon atoms, a cyclohexyl group, a cyclopentyl group, an aryl group, or an aryl group substituted with a halogen atom, an al
- the photocurable resin composition of one embodiment of the present invention preferably further contains a thermosetting component.
- a thermosetting component By containing a thermosetting component, it is possible to impart heat resistance, increase the tensile elongation rate of the cured film, and improve crack resistance and punching resistance.
- the photocurable resin composition of one embodiment of the present invention can further contain a colorant.
- a colorant By containing a colorant, it can be suitably used as a solder resist.
- a dry film obtained by applying and drying the above-described photocurable resin composition on a film.
- a resist layer can be easily formed without applying a photocurable resin composition on a substrate.
- the above-described photocurable resin composition or dry film can be used as a cured product obtained by photocuring by active energy ray irradiation.
- the above-described photocurable resin composition or a dry film thereof can be used as a printed wiring board having a cured product pattern obtained by photocuring by irradiation with active energy rays.
- PCT resistance can be improved without impairing the migration resistance.
- the photocurable resin composition has sensitivity equal to or higher than that of the conventional one and alkali developability, and the cured product does not exhibit brittleness due to temperature change and has good water resistance. It is possible to obtain reliability such as reliability, electrical insulation and PCT resistance.
- the present inventors can achieve the above-described object by using a photocurable thermosetting resin composition containing a carboxyl group-containing resin, a photopolymerization initiator, a vinyl group-containing elastomer, and a styryl group-containing compound. As a result, the present invention has been completed.
- both exposure sensitivity and alkali developability can be achieved.
- flexibility can be provided to the hardened
- the cross-linking by the vinyl group occurs, so that the cross-linking density increases and the heat resistance and weather resistance can be improved.
- the photocurable resin composition of the present embodiment will be described in detail.
- various known carboxyl group-containing resins having a carboxyl group in the molecule can be used for the purpose of imparting alkali developability. .
- a carboxyl group-containing photosensitive resin having an ethylenically unsaturated double bond in the molecule is more preferable in terms of photocurability and development resistance.
- the unsaturated double bond is preferably derived from acrylic acid, methacrylic acid or derivatives thereof.
- carboxyl group-containing resin examples include the following compounds (any of oligomers and polymers) are preferable.
- a carboxyl group-containing resin obtained by copolymerization of an unsaturated carboxylic acid such as (meth) acrylic acid and an unsaturated group-containing compound such as styrene, ⁇ -methylstyrene, lower alkyl (meth) acrylate, and isobutylene.
- Diisocyanates such as aliphatic diisocyanates, branched aliphatic diisocyanates, alicyclic diisocyanates, aromatic diisocyanates, carboxyl group-containing dialcohol compounds such as dimethylolpropionic acid and dimethylolbutanoic acid, polycarbonate polyols, polyethers
- a carboxyl group-containing urethane resin by a polyaddition reaction of a diol compound such as a polyol, a polyester-based polyol, a polyolefin-based polyol, an acrylic polyol, a bisphenol A-based alkylene oxide adduct diol, a compound having a phenolic hydroxyl group and an alcoholic hydroxyl group.
- Diisocyanate and bifunctional epoxy resin such as bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, bixylenol type epoxy resin, biphenol type epoxy resin (Photosensitive carboxyl group-containing urethane resin by polyaddition reaction of (meth) acrylate or its modified partial anhydride, carboxyl group-containing dialcohol compound and diol compound.
- a polyfunctional epoxy resin obtained by epoxidizing a hydroxyl group of a bifunctional (solid) epoxy resin as described later with epichlorohydrin is reacted with (meth) acrylic acid, and a dibasic acid anhydride is added to the resulting hydroxyl group.
- Added photosensitive carboxyl group-containing resin is reacted with (meth) acrylic acid, and a dibasic acid anhydride is added to the resulting hydroxyl group.
- a carboxyl group-containing polyester resin obtained by reacting a difunctional oxetane resin as described later with a dicarboxylic acid and adding a dibasic acid anhydride to the resulting primary hydroxyl group.
- Reaction product obtained by reacting a compound obtained by reacting a compound having a plurality of phenolic hydroxyl groups in one molecule with an alkylene oxide such as ethylene oxide or propylene oxide with an unsaturated group-containing monocarboxylic acid.
- a carboxyl group-containing photosensitive resin obtained by reacting a product with a polybasic acid anhydride.
- (10) Obtained by reacting a compound having a plurality of phenolic hydroxyl groups in one molecule with a reaction product obtained by reacting a cyclic carbonate compound such as ethylene carbonate or propylene carbonate with an unsaturated group-containing monocarboxylic acid.
- a carboxyl group-containing photosensitive resin obtained by reacting a reaction product with a polybasic acid anhydride.
- (11) A photosensitive carboxyl group-containing resin obtained by adding a compound having one epoxy group and one or more (meth) acrylic groups in one molecule to the resins (1) to (10) described above.
- (meth) acrylate is a term that collectively refers to acrylate, methacrylate, and mixtures thereof, and the same applies to other similar expressions.
- the acid value of the carboxyl group-containing resin is preferably in the range of 40 to 200 mgKOH / g.
- the acid value of the carboxyl group-containing resin is less than 40 mgKOH / g, alkali development becomes difficult.
- it exceeds 200 mgKOH / g dissolution of the exposed portion by the developer proceeds, so the line becomes thinner than necessary, and in some cases, dissolution and peeling occur with the developer without distinguishing between the exposed portion and the unexposed portion, It becomes difficult to draw a normal resist pattern. More preferably, it is in the range of 45 to 120 mg KOH / g.
- the weight average molecular weight of the carboxyl group-containing resin varies depending on the resin skeleton, but is generally preferably 2,000 to 150,000. If the weight average molecular weight is less than 2,000, the tack-free performance may be inferior, the moisture resistance of the coated film after exposure may be poor, the film may be reduced during development, and the resolution may be greatly inferior. On the other hand, when the weight average molecular weight exceeds 150,000, developability may be remarkably deteriorated, and storage stability may be inferior. More preferably, it is in the range of 5,000 to 100,000.
- the amount of such a carboxyl group-containing resin is preferably in the range of 20 to 60% by mass in the entire composition.
- the blending amount is less than 20% by mass, the film strength is lowered.
- it is more than 60% by mass, the viscosity of the composition becomes high, and the applicability and the like deteriorate. More preferably, it is in the range of 30 to 50% by mass.
- the photopolymerization initiator is represented by the following general formula (I).
- An oxime ester photopolymerization initiator having a group, an ⁇ -aminoacetophenone photopolymerization initiator having a group represented by the following general formula (II), and / or an acyl having a group represented by the following formula (III) By using one or more photopolymerization initiators selected from the group consisting of phosphine oxide photopolymerization initiators, it becomes possible to obtain good resolution in a resist having a pigment at a high concentration.
- R 1 represents a hydrogen atom, a phenyl group (which may be substituted with an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a halogen atom), an alkyl group having 1 to 20 carbon atoms (one or more). Or a cycloalkyl group having 5 to 8 carbon atoms, an alkanoyl group having 2 to 20 carbon atoms, or benzoyl.
- R 2 is a phenyl group (substituted with an alkyl group having 1 to 6 carbon atoms, a phenyl group or a halogen atom).
- an alkyl group having 1 to 20 carbon atoms (which may be substituted with one or more hydroxyl groups, and may have one or more oxygen atoms in the middle of the alkyl chain), carbon number 5 -8 cycloalkyl groups,
- R 3 and R 4 are each independently 1 to 12 carbon atoms
- R 5 and R 6 each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a cyclic alkyl ether group in which two are bonded
- R 7 and R 8 Each independently represents a linear or branched alkyl group having 1 to 10 carbon atoms, a cyclohexyl group, a cyclopentyl group, an aryl group, or an aryl group substituted with a halogen atom, an al
- oxime ester photopolymerization initiator having a group represented by the general formula (I)
- 2- (acetyloxyiminomethyl) thioxanthen-9-one represented by the following general formula (IV) is preferable.
- the compound represented by the following general formula (V) and the compound represented by the following general formula (VI) are mentioned.
- R 9 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, a cyclopentyl group, a cyclohexyl group, a phenyl group, a benzyl group, a benzoyl group, an alkanoyl group having 2 to 12 carbon atoms, or 2 carbon atoms
- R 10 and R 12 each independently represents a phenyl group (an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a halogen atom may be substituted).
- an alkyl group having 1 to 20 carbon atoms (which may be substituted with one or more hydroxyl groups, and may have one or more oxygen atoms in the middle of the alkyl chain).
- a cycloalkyl group having 5 to 8 carbon atoms an alkanoyl group having 2 to 20 carbon atoms, or a benzoyl group (which may be substituted with an alkyl group having 1 to 6 carbon atoms or a phenyl group)
- R 11 Are a hydrogen atom, a phenyl group (which may be substituted with an alkyl group having 1 to 6 carbon atoms, a phenyl group or a halogen atom), an alkyl group having 1 to 20 carbon atoms (which is substituted with one or more hydroxyl groups).
- Or may have one or more oxygen atoms in the middle of the alkyl chain), a cycloalkyl group having 5 to 8 carbon atoms, an alkanoyl group having 2 to 20 carbon atoms or a benzoyl group (having 1 to And 6 may be substituted with an alkyl group or a phenyl group)
- R 13 , R 14 and R 19 each independently represents an alkyl group having 1 to 12 carbon atoms
- R 15 , R 16 , R 17 and R 18 each independently represents a hydrogen atom or a carbon atom.
- M represents O, S or NH
- x and y each independently represents an integer of 0 to 5
- oxime ester photopolymerization initiators 2- (acetyloxyiminomethyl) thioxanthen-9-one represented by general formula (I) and a compound represented by general formula (V) are more preferable.
- Commercially available products include CGI-325 manufactured by Ciba Japan, Irgacure (registered trademark) OXE01, Irgacure OXE02, N-1919 manufactured by ADEKA, and the like. These oxime ester photopolymerization initiators can be used alone or in combination of two or more.
- the ⁇ -aminoacetophenone photopolymerization initiator having a group represented by the general formula (II) includes 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.
- Examples of the acylphosphine oxide photopolymerization initiator having a group represented by the general formula (III) include 2,4,6-trimethylbenzoyldiphenylphosphine oxide and bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide. Bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide, and the like. Examples of commercially available products include Lucilin TPO manufactured by BASF and Irgacure 819 manufactured by Ciba Japan.
- the blending amount of such a photopolymerization initiator is preferably 0.01 to 30 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin.
- the blending amount of the photopolymerization initiator is less than 0.01 parts by mass, the photocurability on copper is insufficient, and the coating film is peeled off or the coating properties such as chemical resistance are deteriorated.
- it exceeds 30 parts by mass light absorption on the surface of the solder resist coating film of the photopolymerization initiator becomes intense, and the deep curability tends to decrease. More preferably, it is 0.5 to 15 parts by mass.
- the blending amount is preferably 0.01 to 20 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin. More preferably, it is 0.01 to 5 parts by mass.
- Photopolymerization initiators, photoinitiator assistants and sensitizers that can be suitably used for the photocurable resin composition of the present embodiment include benzoin compounds, acetophenone compounds, anthraquinone compounds, thioxanthone compounds, ketal compounds, Examples include benzophenone compounds, xanthone compounds, and tertiary amine compounds.
- 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-benzoyl diphenyl sulfide, 4-benzoyl-4′-methyl diphenyl sulfide, 4-benzoyl-4′-ethyl diphenyl sulfide, 4-benzoyl-4′-propyl diphenyl sulfide, and the like. It is done.
- an ethanolamine compound a compound having a dialkylaminobenzene structure
- 4,4′-dimethylaminobenzophenone (Nisso MABP manufactured by Nippon Soda Co., Ltd.), 4,4′-diethylaminobenzophenone (Hodogaya Chemical Co., Ltd.) Dialkylaminobenzophenones such as EAB); dialkylamino group-containing coumarin compounds such as 7- (diethylamino) -4-methyl-2H-1-benzopyran-2-one (7- (diethylamino) -4-methylcoumarin); Ethyl dimethylaminobenzoate (Kayacure (registered trademark) EPA, manufactured by Nippon Kayaku Co., Ltd.), Ethyl 2-dimethylaminobenzoate (Quantacure DMB, manufactured by International Bio-Synthetics), 4-dimethylaminobenzoic
- a compound having a dialkylaminobenzene structure is preferable, and among them, a dialkylaminobenzophenone compound and a dialkylamino group-containing coumarin compound having a maximum absorption wavelength of 350 to 410 nm are preferable.
- the dialkylaminobenzophenone compound 4,4'-diethylaminobenzophenone is preferable because of its low toxicity.
- the dialkylamino group-containing coumarin compound having a maximum absorption wavelength of 350 to 410 nm is not colored because the maximum absorption wavelength is in the ultraviolet region, and uses not only a colorless and transparent photosensitive composition but also a colored pigment. A colored solder resist film reflecting the color can be provided.
- 7- (diethylamino) -4-methyl-2H-1-benzopyran-2-one is preferable because it exhibits an excellent sensitizing effect on laser light having a wavelength of 400 to 410 nm.
- thioxanthone compounds and tertiary amine compounds are preferable.
- the composition of the present embodiment preferably contains a thioxanthone compound from the viewpoint of deep curable properties.
- 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-diisopropyl Thioxanthone compounds such as thioxanthone are preferred.
- a compounding quantity of a thioxanthone compound 20 mass parts or less are preferable with respect to 100 mass parts of carboxyl group-containing resin.
- the compounding quantity of a thioxanthone compound exceeds 20 mass parts, thick film sclerosis
- the compounding amount of the tertiary amine compound is preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the carboxyl group-containing 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.
- a ratio of 0.1 to 10 parts by mass is more preferable.
- 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 resin. When it exceeds 35 parts by mass, the deep curability tends to decrease due to light absorption.
- N-phenylglycines phenoxyacetic acids, thiophenoxyacetic acids, mercaptothiazole and the like can be used as chain transfer agents in order to improve sensitivity.
- chain transfer agent include mercaptosuccinic acid, mercaptoacetic acid, mercaptopropionic acid, methionine, cysteine, thiosalicylic acid and derivatives thereof. These chain transfer agents can be used alone or in combination of two or more.
- the vinyl group-containing elastomer used in the photocurable resin composition of the present embodiment enables both exposure sensitivity and alkali developability, imparts flexibility to the cured product of the photocurable resin composition, and provides a cured product. Used to improve brittleness. Furthermore, cross-linking by vinyl groups occurs, so that the cross-linking density is increased and heat resistance and weather resistance can be improved.
- the vinyl group-containing elastomer used in the photocurable resin composition of the present embodiment is not particularly limited as long as it is an elastomer containing a vinyl group.
- R-45HT Poly bd HTP-9 (all manufactured by Idemitsu Kosan Co., Ltd.), Eporide (registered trademark) PB3600 (manufactured by Daicel Chemical Industries), Denarex (registered trademark) R-45EPT (Nagase ChemteX) Ricon (registered trademark) 130, Ricon 131, Ricon 134, Ricon 142, Ricon 150, Ricon 152, Ricon 153, Ricon 154, Ricon 156, Ricon 157, Ricon 100, Ricon 181, Ricon 184, Ricon 130MA, Ricon 130MA13, Ricon 130MA20, Ricon 131MA5, Ricon 131MA10, Ricon 131MA17, Ricon 131MA20, R con 184MA6, Ricon 156MA17 (both Sartomer
- the compounding amount of such a vinyl group-containing elastomer is preferably 3 to 100 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin.
- the blending amount is less than 3 parts by mass, it becomes difficult to obtain sufficient flexibility and stress relaxation.
- it exceeds 100 parts by mass the developability of the composition is lowered, and it becomes difficult to obtain good resolution. More preferably, it is 10 to 60 parts by mass.
- the styryl compound that can be used in the photocurable resin composition of the present embodiment is used for imparting heat resistance.
- a styryl group-containing compound may be synthesized by a conventional method, or a commercially available product may be used.
- Examples of the method for synthesizing a styryl group-containing compound include, for example, a reaction between a mono / polyfunctional phenol and a halogenated methylstyrene, a monofunctional group having a functional group capable of reacting with an epoxy group (for example, an amino group, a hydroxyl group, a carboxyl group, etc.).
- -Reaction of a polyfunctional compound and vinyl benzyl glycidyl ether is mentioned.
- the styryl compound examples include vinyl naphthalene, divinyl naphthalene, divinyl biphenyl, a polyvinyl benzyl ether compound obtained by the reaction of polyphenol and vinyl benzyl halide, and an oligophenylene ether compound of terminal styrene (OPE manufactured by Mitsubishi Gas Chemical Company).
- -2St a compound obtained by the reaction of bisphenol A and vinylbenzyl halide ((Loxy (registered trademark) BPV-1X manufactured by Showa Polymer Co., Ltd.), and the like.
- a styryl compound can be used individually by 1 type or in combination of 2 or more types.
- the amount of such a styryl group-containing compound is preferably 1 to 50 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin.
- the blending amount is less than 1 part by mass, it becomes difficult to obtain sufficient heat resistance.
- it exceeds 50 parts by mass a development residue is generated. More preferably, it is 1 to 10 parts by mass.
- an additional reagent, a chain transfer agent, and / or a mercapto compound that acts as an adhesion-imparting agent is added for the purpose of improving curability and adhesion of the resulting cured product to the substrate. be able to.
- Examples of mercapto compounds include chain transfer agents having a hydroxyl group such as mercaptoethanol, mercaptopropanol, mercaptobutanol, mercaptopropanediol, mercaptobutanediol, hydroxybenzenethiol and derivatives thereof; 1-butanethiol, butyl-3-mercaptopro Pionate, methyl-3-mercaptopropionate, 2,2- (ethylenedioxy) diethanethiol, ethanethiol, 4-methylbenzenethiol, dodecyl mercaptan, propanethiol, butanethiol, pentanethiol, 1-octanethiol , Cyclopentanethiol, cyclohexanethiol, thioglycerol, 4,4-thiobisbenzenethiol and the like.
- chain transfer agents having a hydroxyl group such as mercaptoethanol, mer
- Examples of these commercially available products include BMPA, MPM, EHMP, NOMP, MBMP, STMP, TMMP, PEMP, DPMP, and TEMPIC (all manufactured by Sakai Chemical Industry Co., Ltd.), Karenz MT (registered trademark) -PE1, Karenz MT- BD1, Karenz (registered trademark) -NR1 (all manufactured by Showa Denko KK) and the like can be mentioned.
- mercapto-4-butyrolactone also known as 2-mercapto-4-butanolide
- 2-mercapto-4-methyl-4-butyrolactone 2-mercapto-4-ethyl-4 -Butyrolactone
- 2-mercapto-4-butyrothiolactone 2-mercapto-4-butyrolactam
- 2-mercapto-4-butyrolactam N-methoxy-2-mercapto-4-butyrolactam
- N-ethoxy-2-mercapto-4-butyrolactam N-methyl- 2-mercapto-4-butyrolactam
- N-ethyl-2-mercapto-4-butyrolactam N- (2-methoxy) ethyl-2-mercapto-4-butyrolactam
- 2-ethoxy) ethyl-2-mercapto- 4-butyrolactam 2-mercapto-5-valerolactone, 2-me Capto-5-valerolactam
- Disnet® F 2-dibutylamino-4,6-dimercapto-s-triazine
- Disnet DB 2-anilino- 4,6-dimercapto-s-triazine
- 2-mercaptobenzimidazole, 2-mercaptobenzoxazole, 2-mercaptobenzothiazole (Axel M manufactured by Kawaguchi Chemical Industry Co., Ltd.) as a mercapto compound having a heterocyclic ring that does not impair the developability of the photocurable resin composition 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.
- These mercapto compounds can be used alone or in combination of two or more.
- thermosetting component can be added to the photocurable resin composition of the present embodiment in order to impart heat resistance.
- thermosetting components used in the present invention include amino resins such as melamine resins, benzoguanamine resins, melamine derivatives, and benzoguanamine derivatives, block isocyanate compounds, cyclocarbonate compounds, polyfunctional epoxy compounds, polyfunctional oxetane compounds, episulfide resins, and the like.
- the thermosetting resin can be used.
- Particularly preferred is a thermosetting component having two or more cyclic ether groups and / or cyclic thioether groups (hereinafter abbreviated as cyclic (thio) ether groups) in the molecule.
- thermosetting component having a plurality of cyclic (thio) ether groups in the molecule has either one of the three, four or five-membered cyclic (thio) ether groups or two types 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
- thioether groups in the molecule A compound having the same, that is, an episulfide resin.
- Examples of the polyfunctional epoxy compound include jER (registered trademark) 828, jER834, jER1001, jER1004 (all manufactured by Mitsubishi Chemical Corporation), Epicron (registered trademark) 840, Epicron 850, Epicron 1050, and Epicron 2055 (all DIC Corporation).
- Epototo registered trademark
- YD-011, YD-013, YD-127, YD-128 all manufactured by Nippon Steel Chemical Co., Ltd.
- Bisphenol A type epoxy resin such as 664 (all manufactured by Asahi Kasei Kogyo Co., Ltd.); jERYL903 (manufactured by Mitsubishi Chemical), Epicron 152, Epicron 165 (all manufactured by DIC), Epototo YDB-400, YDB-500 (all new) Manufactured by Nippon Steel Chemical Co., Ltd.)
- E. R. 542 manufactured by Dow Chemical Company
- Araldite 8011 manufactured by Ciba Japan
- Sumiepoxy ESB-400, ESB-700 both manufactured by Sumitomo Chemical Co., Ltd.
- Brominated epoxy resins such as 714 (both manufactured by Asahi Kasei Kogyo Co., Ltd.); jER152, jER154 (both manufactured by Mitsubishi Chemical Co., Ltd.); E. N. 431, D.D. E. N.
- E. R. Novolak type epoxy resins such as ECN-235 and ECN-299 (both manufactured by Asahi Kasei Kogyo Co., Ltd.); Epicron 830 (manufactured by DIC), jER807 (manufactured by Mitsubishi Chemical), Epototo YDF-170, YDF-175, YDF-2004 Bisphenol F epoxy resins such as Araldite XPY306 (manufactured by Ciba Japan); Epototo ST-2004, ST-2007, ST-3000 (all manufactured by Nippon Steel Chemical Co., Ltd.) Hydrogenated bisphenol A type epoxy resins such as jER604 (Japan epoxy resin ⁇ Mitsubishi Chemical Co., Ltd.), Epototo YH-434 (Nippon Steel Chemical Co., Ltd.), Araldite MY720 (Ciba Japan Co., Ltd.), Sumiepoxy ELM-120 ( Glycidylamine type epoxy resin such as Sumitomo Chemical Co., Ltd.
- Trihydroxyphenylmethane type epoxy resins such as EPPN (registered trademark) -501 and EPPN-502 (all manufactured by Nippon Kayaku Co., Ltd.); YL-6056, YX-4000, YL-6121 (all manufactured by Mitsubishi Chemical Corporation) Bisylenol type or biphenol type epoxy resins such as bisphenol S type epoxy resins such as EBPS-200 (manufactured by Nippon Kayaku Co., Ltd.), EPX-30 (manufactured by ADEKA), EXA-1514 (manufactured by DIC) Bisphenol A novolak type epoxy resin such as jER157S (Mitsubishi Chemical); tetraphenylolethane type epoxy resin such as jERYL-931 (Mitsubishi Chemical), Araldite 163 (Ciba Japan); Araldite PT810 (Ciba) ⁇ Product made in Japan, TEPIC (product made in Nissan Chemical Industries) Heterocyclic epoxy resins such as Bre
- CTBN modified epoxy resins e.g., manufactured by Nippon Steel Chemical Co., Ltd. of YR-102, YR-450, etc.
- These epoxy resins can be used alone or in combination of two or more.
- a novolac type epoxy resin, a heterocyclic epoxy resin, a bisphenol A type epoxy resin or a mixture thereof is particularly preferable.
- Polyfunctional oxetane compounds 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) In addition to 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 novolac resin, poly (P-hydroxystyrene), card
- Examples of the compound having a plurality of cyclic thioether groups in the molecule include bisphenol A type episulfide resin YL7000 manufactured by Mitsubishi Chemical Corporation. Moreover, episulfide resin etc. which substituted the oxygen atom of the epoxy group of the novolak-type epoxy resin by the sulfur atom using the same synthesis method can also be used.
- the blending 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 resin.
- the blending amount of the thermosetting component having a plurality of cyclic (thio) ether groups in the molecule is less than 0.6, a carboxyl group remains in the solder resist film, and heat resistance, alkali resistance, electrical insulation, etc. are lowered. .
- the amount exceeds 2.5 equivalents the low molecular weight cyclic (thio) ether group remains in the dry coating film, thereby reducing the strength of the coating film. More preferably, it is 0.8 to 2.0 equivalents.
- thermosetting components include amino resins such as melamine derivatives and benzoguanamine derivatives.
- amino resins such as melamine derivatives and benzoguanamine derivatives.
- methylol melamine compounds there are methylol melamine compounds, methylol benzoguanamine compounds, methylol glycoluril compounds and methylol urea compounds.
- the alkoxymethylated melamine compound, alkoxymethylated benzoguanamine compound, alkoxymethylated glycoluril compound and 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 alone or in combination of two or more.
- a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule can be added to the photocurable resin composition of the present embodiment in order to improve curability and toughness of the resulting cured film.
- Examples of such a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule include polyisocyanate compounds or blocked isocyanate compounds.
- the blocked isocyanate group is a group in which the isocyanate group is protected by the reaction with the blocking agent and temporarily inactivated, and the blocking agent is dissociated when heated to a predetermined temperature. Produces.
- polyisocyanate compound for example, aromatic polyisocyanate, aliphatic polyisocyanate or alicyclic polyisocyanate is used.
- aromatic polyisocyanate examples include, for example, 4,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, naphthalene-1,5-diisocyanate, o-xylylene diisocyanate, Examples thereof include m-xylylene diisocyanate and 2,4-tolylene dimer.
- aliphatic polyisocyanate examples include tetramethylene diisocyanate, hexamethylene diisocyanate, methylene diisocyanate, trimethylhexamethylene diisocyanate, 4,4-methylenebis (cyclohexyl isocyanate), and isophorone diisocyanate.
- alicyclic polyisocyanate examples include bicycloheptane triisocyanate.
- adduct bodies, burette bodies and isocyanurate bodies of the isocyanate compounds mentioned above may be mentioned.
- the blocked isocyanate compound an addition reaction product of an isocyanate compound and an isocyanate blocking agent is used.
- an isocyanate compound which can react with a blocking agent the above-mentioned polyisocyanate compound etc. are mentioned, for example.
- isocyanate blocking agent examples include phenolic blocking agents such as phenol, cresol, xylenol, chlorophenol and ethylphenol; lactam blocking agents such as ⁇ -caprolactam, ⁇ -palerolactam, ⁇ -butyrolactam and ⁇ -propiolactam; Active methylene blocking agents such as ethyl acetoacetate and acetylacetone; methanol, ethanol, propanol, butanol, amyl alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, benzyl Ether, methyl glycolate, butyl glycolate, diacetone alcohol, lactic acid And alcohol blocking agents such as ethyl lactate; oxime blocking agents such as formaldehyde oxime, acetaldoxime, acetoxime, methyl e
- 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.
- TPLS-2078, TPLS-2117, Desmotherm 2170, Desmotherm 2265 (all manufactured by Sumitomo Bayer Urethane Co., Ltd.), Coronate (registered trademark) 2512, Coronate 2513, Coronate 2520 (all manufactured by Nippon Polyurethane Industry Co., Ltd.), B-830, B-815, B-846, B-870, B-874, B-882 (all manufactured by Mitsui Takeda Chemical), TPA-B80E, 17B-60PX, E402-B80T (all manufactured by Asahi Kasei Chemicals), etc. Can be mentioned.
- Sumijoules BL-3175 and BL-4265 are obtained using methyl ethyl oxime as a blocking agent.
- a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule can be used alone or in combination of two or more.
- the compounding amount of the compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule is preferably 1 to 100 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin.
- the blending amount is less than 1 part by mass, sufficient coating film toughness cannot be obtained.
- a ratio of 2 to 70 parts by mass is more preferable.
- 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 imidazole compounds) manufactured by Shikoku Kasei Kogyo Co., Ltd., U-CAT3503N and U-CAT3502T manufactured by San Apro ( Dimethylamine block isocyanate compounds), DBU, DBN, U-CATSA102, U-CAT (registered trademark) 5002 (all are trade names of bicyclic amidine compounds and salts thereof), and the like.
- 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 in the usual quantitative ratio.
- the amount is 0.1 to 20 parts by mass, more preferably 0.5 to 15 parts by mass.
- the photocurable resin composition of this embodiment can mix
- known colorants such as red, blue, green and yellow can be used, and any of pigments, dyes and pigments may be used. However, it is preferable not to contain a halogen from the viewpoint of reducing the environmental burden and affecting the human body.
- red colorants examples include monoazo, diazo, azo lake, benzimidazolone, perylene, diketopyrrolopyrrole, condensed azo, anthraquinone, and quinacridone.
- CI issued by The Society of Dyers and Colorists
- 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 colorants include phthalocyanine and anthraquinone, and pigments include 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, and dye series 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. In addition to these, metal-substituted or unsubstituted phthalocyanine compounds can also be used.
- the green colorant there are phthalocyanine series, anthraquinone series, and perylene series.
- Pigment Green 7, Pigment Green 36, Solvent Green 3, Solvent Green 5, Solvent Green 20, Solvent Green 28, etc. may be used. it can.
- metal-substituted or unsubstituted phthalocyanine compounds can also be used.
- yellow colorants 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.
- the blending ratio of such a colorant is not particularly limited, but is preferably 10 parts by mass or less, particularly preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin. .
- the compound having a plurality of ethylenically unsaturated groups in the molecule used in the photocurable resin composition of the present embodiment is photocured by irradiation with active energy rays, and an ethylenically unsaturated group-containing carboxyl group-containing resin is obtained. Insolubilizes or helps insolubilize in an aqueous alkali solution.
- glycol diacrylates such as ethylene glycol, methoxytetraethylene glycol, polyethylene glycol, and propylene glycol; hexanediol, trimethylolpropane, pentaerythritol, dipentaerythritol, tris-hydroxyethyl isocyanurate, and the like.
- Polyhydric acrylates such as polyhydric alcohols or their ethylene oxide adducts or propylene oxide adducts; Phenoxy acrylate, bisphenol A diacrylate, and polyhydric acrylates such as ethylene oxide adducts or propylene oxide adducts of these phenols
- Phenoxy acrylate, bisphenol A diacrylate, and polyhydric acrylates such as ethylene oxide adducts or propylene oxide adducts of these phenols
- 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.
- the epoxy urethane acrylate compound etc. which made the half urethane compound react are mentioned.
- Such an epoxy acrylate resin can improve photocurability without deteriorating the touch drying property.
- the compounding amount of the compound having a plurality of ethylenically unsaturated groups in the molecule is preferably 5 to 100 parts by mass with respect to 100 parts by mass of the carboxyl group-containing resin.
- 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.
- it exceeds 100 mass parts the solubility with respect to alkaline aqueous solution falls, and a coating film becomes weak.
- a ratio of 1 to 70 parts by mass is more preferable.
- a filler can be blended as necessary in order to increase the physical strength of the coating film.
- known inorganic or organic fillers can be used.
- barium sulfate, spherical silica, hydrotalcite and talc are preferably used.
- metal hydroxides such as titanium oxide, metal oxide, and aluminum hydroxide can be used as extender pigment fillers.
- the blending amount of the filler is preferably 75% by mass or less of the total amount of the composition.
- the blending amount of the filler exceeds 75% by mass of the total amount of the composition, the viscosity of the insulating composition is increased, and the coating and moldability are lowered, or the cured product is brittle. More preferably, the content is 0.1 to 60% by mass.
- the photocurable resin composition of the present embodiment can use an organic solvent for the synthesis of a carboxyl group-containing resin, the preparation of the composition, or the viscosity adjustment for application to a substrate or a film. .
- organic solvents examples include ketones, aromatic hydrocarbons, glycol ethers, glycol ether acetates, esters, alcohols, aliphatic hydrocarbons, petroleum solvents, and the like. More specifically, 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 a
- the photocurable resin composition of the present invention prevents oxidation, (1) radical scavengers that invalidate the generated radicals and / or (2) peroxide decomposers that decompose the generated peroxides into harmless substances and prevent new radicals from being generated. Antioxidants can be added.
- 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 (all manufactured by ADEKA), IRGANOX (registered trademark) 1010, IRGANOX 1035, IRGANOX 1076, IRGANOX 1135, TINUVIN (registered trademark) 111FDL, TINUVIN 123, TINUVIN 144, TINUVIN 152, TINUVIN 29, 2 , TINUVIN ⁇ ⁇ ⁇ 5100 (both manufactured by Ciba Japan).
- 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 (manufactured by ADEKA), Mark AO-412S (manufactured by Adeka Argus Chemical Co., Ltd.), Sumilyzer (registered trademark) TPS (manufactured by Sumitomo Chemical). Etc.
- Such antioxidants can be used singly or in combination of two or more.
- the photocurable resin composition of the present invention includes an ultraviolet absorber in addition to the antioxidant in order to take a countermeasure against stabilization against ultraviolet rays. Can be used.
- ultraviolet absorbers examples include benzophenone derivatives, benzoate derivatives, benzotriazole derivatives, triazine derivatives, benzothiazole derivatives, cinnamate derivatives, anthranilate derivatives, dibenzoylmethane derivatives, and the like.
- benzophenone derivatives examples include 2-hydroxy-4-methoxy-benzophenone 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone and 2 , 4-dihydroxybenzophenone and the like.
- benzoate derivatives include 2-ethylhexyl salicylate, phenyl salicylate, pt-butylphenyl salicylate, 2,4-di-t-butylphenyl-3,5-di-t-butyl- Examples thereof include 4-hydroxybenzoate and hexadecyl-3,5-di-t-butyl-4-hydroxybenzoate.
- benzotriazole derivatives examples include 2- (2′-hydroxy-5′-t-butylphenyl) benzotriazole, 2- (2′-hydroxy-5′-methylphenyl) enzotriazole, 2- (2′- Hydroxy-3′-t-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) -5-chlorobenzotriazole, Examples include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole and 2- (2′-hydroxy-3 ′, 5′-di-t-amylphenyl) benzotriazole.
- triazine derivative examples 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 (both manufactured by Ciba Japan) and the like.
- Such ultraviolet absorbers can be used singly or in combination of two or more, and the stability of the cured product obtained from the photocurable resin composition of the present embodiment when used in combination with an antioxidant. Can be achieved.
- the photo-curable resin composition of the present embodiment further includes a known thickener such as a known thermal polymerization inhibitor, finely divided silica, organic bentonite, and montmorillonite, silicone-based, fluorine-based, polymer-based, etc.
- a known thickener such as a known thermal polymerization inhibitor, finely divided silica, organic bentonite, and montmorillonite, silicone-based, fluorine-based, polymer-based, etc.
- the known antifoaming agent and / or leveling agent, imidazole-based, thiazole-based, triazole-based silane coupling agents, antioxidants, rust inhibitors, and the like can be blended.
- the thermal polymerization inhibitor can be used to prevent thermal polymerization or temporal polymerization of the polymerizable compound contained in the photocurable resin composition of the present embodiment.
- 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, phenothiazine, nitroso compound, chelate of nitros
- an adhesion promoter can be used in order to improve adhesion between layers or adhesion between the photosensitive resin layer and the substrate.
- an adhesion promoter can be used in order to improve adhesion between layers or adhesion between the photosensitive resin layer and the substrate.
- the photocurable resin composition of the present embodiment configured as described above is prepared to a predetermined composition, it is adjusted to a viscosity suitable for a coating method with an organic solvent, for example, on a substrate, a dip coating method, It is applied by a method such as a flow coating method, a roll coating method, a bar coater method, a screen printing method or a curtain coating method.
- the organic solvent contained in the composition is volatilized and dried (temporarily dried) at a temperature of about 60 to 100 ° C. to form a tack-free coating film (resin insulating layer).
- the volatile drying is performed by using a hot air circulation drying furnace, an IR furnace, a hot plate, a convection oven or the like (using a method having a heat source of an air heating method using steam in a countercurrent contact with hot air in the dryer) A method of spraying on a support).
- a resin insulating layer may be formed by forming a dry film from the photocurable resin composition and pasting it on a substrate.
- the dry film has a structure in which, for example, a carrier film such as polyethylene terephthalate, a resin insulating layer such as a solder resist layer, and a peelable cover film used as necessary are laminated in this order.
- a carrier film such as polyethylene terephthalate
- a resin insulating layer such as a solder resist layer
- a peelable cover film used as necessary are laminated in this order.
- the resin insulation layer is a layer obtained by applying and drying a photocurable resin composition on a carrier film or a cover film.
- the photocurable resin composition of the present embodiment is uniformly applied to a carrier film with a thickness of 10 to 150 ⁇ m using a blade coater, a lip coater, a comma coater, a film coater, etc., and then dried. Formed. And a dry film is formed by laminating
- the carrier film may be laminated after the photocurable resin composition is applied to the cover film and dried.
- thermoplastic film such as a polyester film having a thickness of 2 to 150 ⁇ m is used.
- 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.
- paper phenol, paper epoxy, glass cloth epoxy, glass polyimide, glass cloth / non-woven cloth epoxy, glass cloth / paper epoxy, synthetic fiber epoxy All grades (FR-4, etc.) of copper clad laminates such as copper clad laminates for high frequency circuits using fluorine, polyethylene, PPO, cyanate esters, etc., other polyimide films, PET films, A glass substrate, a ceramic substrate, a wafer board, etc. can be mentioned.
- exposure is selectively performed with an active energy ray or directly with a laser direct exposure machine through a photomask having a pattern formed by a contact method (or non-contact method).
- a direct drawing device for example, a laser direct imaging device that draws an image directly with a laser using CAD data from a computer
- an exposure device equipped with a metal halide lamp for example, an exposure machine mounted, an exposure machine equipped with a mercury short arc lamp, or a direct drawing apparatus using an ultraviolet lamp such as a (super) high pressure mercury lamp.
- the active energy ray it is preferable to use laser light having a wavelength in the range of 350 to 410 nm. As the active energy ray, it is preferable to use laser light having a wavelength in the range of 350 to 410 nm. By setting the maximum wavelength within this range, radicals can be efficiently generated from the photoinitiator. If a laser beam in this range is used, either a gas laser or a solid laser may be used.
- the exposure amount varies depending on the film thickness and the like, but can be generally in the range of 5 to 200 mJ / cm 2 , preferably 5 to 100 mJ / cm 2 , more preferably 5 to 50 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 wavelength of 350 to 410 nm.
- the exposed portion portion irradiated with the active energy ray
- the unexposed portion is diluted with a dilute alkaline aqueous solution (for example, 0.3 to 3 wt% Na 2 CO 3 aqueous solution).
- Development is performed to form a cured product (pattern).
- the developing method can be a dipping method, a shower method, a spray method, a brush method, or the like.
- an alkaline aqueous solution such as potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium phosphate, sodium silicate, ammonia, amines and the like can be used.
- thermosetting component when added, for example, by heating to a temperature of about 140 to 180 ° C. and thermosetting, the carboxyl group of the carboxyl group-containing resin and, for example, a plurality of cyclic (thio) ether groups in the molecule are added.
- the thermosetting component which it has reacts and can form hardened
- reaction solution was cooled to room temperature, and 1.56 g of 89% phosphoric acid was added to and mixed with the reaction solution to neutralize potassium hydroxide.
- a novolak-type cresol resin propylene oxide reaction solution was obtained. This was an average of 1.08 moles of alkylene oxide added per equivalent of phenolic hydroxyl group.
- ⁇ Optimum exposure amount> The photocurable / thermosetting resin compositions of the examples and comparative examples were coated on the entire surface by screen printing after applying a circuit board with a copper thickness of 35 ⁇ m after buffing, washing with water and drying, and heated at 80 ° C. Dry in a circulating drying oven for 60 minutes. After drying, exposure is performed through a step tablet (Kodak No. 2) using an exposure apparatus equipped with a high-pressure mercury lamp (short arc lamp), and development (30 ° C., 0.2 MPa, 1 wt% Na 2 CO 3 aqueous solution) is performed at 60. When the pattern of the step tablet remaining when it was performed in seconds was 7 steps, the optimum exposure amount was set.
- Characteristic test The composition of each example and comparative example was applied onto the patterned copper foil substrate so that the film thickness after drying by screen printing was 20 ⁇ m, dried at 80 ° C. for 30 minutes, and allowed to cool to room temperature. To do.
- the substrate is exposed to a solder resist pattern at an optimum exposure amount using an exposure apparatus equipped with a high-pressure mercury lamp (short arc lamp), and a 1 wt% Na 2 CO 3 aqueous solution at 30 ° C. is applied for 60 seconds under a spray pressure of 2 kg / cm 2. Development was performed to obtain a resist pattern.
- This substrate was irradiated with ultraviolet rays under a condition of an integrated exposure amount of 1000 mJ / cm 2 in a UV conveyor furnace, and then cured by heating at 150 ° C. for 60 minutes.
- the characteristics of the obtained printed circuit board (evaluation board) were evaluated as follows.
- ⁇ Electroless gold plating resistance> Using commercially available electroless nickel plating bath and electroless gold plating bath, plating is performed under the conditions of nickel 0.5 ⁇ m and gold 0.03 ⁇ m, and the presence or absence of peeling of the resist layer or plating penetration by tape peel After evaluating the presence or absence, the presence or absence of peeling of the resist layer was evaluated. The judgment criteria are as follows. A: No soaking or peeling is observed. ⁇ : Slight penetration is confirmed after plating, but does not peel off after tape peeling. ⁇ : Slight penetration after plating and peeling after tape peel. X: There is peeling after plating.
- HAST ⁇ Insulation after humidification test
- ⁇ TCT resistance> A solder resist was applied to a substrate on which a 2 mm copper line pattern was formed, exposed and developed, and then thermally cured to produce an evaluation substrate on which a 3 mm square resist pattern was formed on the copper line.
- This evaluation substrate was put into a thermal cycle machine in which a temperature cycle was performed between ⁇ 65 ° C. and 150 ° C., and TCT (Thermal Cycle Test) was performed. The appearance at 600 cycles, 800 cycles and 1000 cycles was observed. A: No abnormality at 1000 cycles. ⁇ : No abnormality at 800 cycles, cracks occurred at 1000 cycles. ⁇ : No abnormality at 600 cycles, crack occurred at 800 cycles. X: Cracks occurred at 600 cycles.
- ⁇ PCT resistance> The evaluation substrate on which the solder resist cured coating film was formed was subjected to PCT (Pressure Cooker Test) at 168, 192 hours under the conditions of 121 ° C., saturation and 0.2 MPa using a PCT apparatus (HAST SYSTEM TPC-412MD manufactured by Espec). went. The state of the coating film after PCT was evaluated. Judgment criteria are as follows. A: No swelling, peeling, discoloration or elution from 192 hours. ⁇ : No swelling, peeling, discoloration, or elution from 168 hours. ⁇ : Some swelling, peeling, discoloration, and elution. X: Swelling, peeling, discoloration, and elution are often observed.
- Dry film evaluation Evaluation substrates were prepared for the resin compositions of Example 2 and Comparative Example 1 by the method shown below, and evaluated in the same manner.
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Abstract
Description
このような構成により、露光感度とアルカリ現像性を両立させることができ、また、その硬化物において、良好な無電解金めっき耐性、電気特性及びPCT耐性を得ることが可能となる。
また、スチリル化合物が耐熱性を付与することが可能となる。
先ず、本実施形態の光硬化性樹脂組成物を構成するカルボキシル基含有樹脂としては、アルカリ現像性を付与する目的で分子中にカルボキシル基を有している公知の各種カルボキシル基含有樹脂を使用できる。
(1)(メタ)アクリル酸等の不飽和カルボン酸と、スチレン、α-メチルスチレン、低級アルキル(メタ)アクリレート、イソブチレン等の不飽和基含有化合物との共重合により得られるカルボキシル基含有樹脂。
(2)脂肪族ジイソシアネート、分岐脂肪族ジイソシアネート、脂環式ジイソシアネート、芳香族ジイソシアネート等のジイソシアネートと、ジメチロールプロピオン酸、ジメチロールブタン酸等のカルボキシル基含有ジアルコール化合物及びポリカーボネート系ポリオール、ポリエーテル系ポリオール、ポリエステル系ポリオール、ポリオレフィン系ポリオール、アクリル系ポリオール、ビスフェノールA系アルキレンオキシド付加体ジオール、フェノール性ヒドロキシル基及びアルコール性ヒドロキシル基を有する化合物等のジオール化合物の重付加反応によるカルボキシル基含有ウレタン樹脂。
(3)ジイソシアネートと、ビスフェノールA型エポキシ樹脂、水添ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、ビスフェノールS型エポキシ樹脂、ビキシレノール型エポキシ樹脂、ビフェノール型エポキシ樹脂等の2官能エポキシ樹脂の(メタ)アクリレートもしくはその部分酸無水物変性物、カルボキシル基含有ジアルコール化合物及びジオール化合物の重付加反応による感光性カルボキシル基含有ウレタン樹脂。
(4)上述した(2)又は(3)の樹脂の合成中に、ヒドロキシアルキル(メタ)アクリレート等の分子内に1つの水酸基と1つ以上の(メタ)アクリル基を有する化合物を加え、末端(メタ)アクリル化した感光性カルボキシル基含有ウレタン樹脂。
(5)上述した(2)又は(3)の樹脂の合成中に、イソホロンジイソシアネートとペンタエリスリトールトリアクリレート等のモル反応物等、分子内に1つのイソシアネート基と1つ以上の(メタ)アクリル基を有する化合物を加え末端(メタ)アクリル化した感光性カルボキシル基含有ウレタン樹脂。
(6)後述するような2官能又はそれ以上の多官能(固形)エポキシ樹脂に(メタ)アクリル酸を反応させ、側鎖に存在する水酸基に2塩基酸無水物を付加させた感光性カルボキシル基含有樹脂。
(7)後述するような2官能(固形)エポキシ樹脂の水酸基をさらにエピクロロヒドリンでエポキシ化した多官能エポキシ樹脂に(メタ)アクリル酸を反応させ、生じた水酸基に2塩基酸無水物を付加させた感光性カルボキシル基含有樹脂。
(8)後述するような2官能オキセタン樹脂にジカルボン酸を反応させ、生じた1級の水酸基に2塩基酸無水物を付加させたカルボキシル基含有ポリエステル樹脂。
(9)1分子中に複数のフェノール性水酸基を有する化合物とエチレンオキシド、プロピレンオキシド等のアルキレンオキシドとを反応させて得られる反応生成物に不飽和基含有モノカルボン酸を反応させ、得られる反応生成物に多塩基酸無水物を反応させて得られるカルボキシル基含有感光性樹脂。
(10)1分子中に複数のフェノール性水酸基を有する化合物とエチレンカーボネート、プロピレンカーボネート等の環状カーボネート化合物とを反応させて得られる反応生成物に不飽和基含有モノカルボン酸を反応させ、得られる反応生成物に多塩基酸無水物を反応させて得られるカルボキシル基含有感光性樹脂。
(11)上述した(1)~(10)の樹脂にさらに1分子内に1つのエポキシ基と1つ以上の(メタ)アクリル基を有する化合物を付加してなる感光性カルボキシル基含有樹脂。
光重合開始剤としては、下記一般式(I)で表される基を有するオキシムエステル系光重合開始剤、下記一般式(II)で表される基を有するα-アミノアセトフェノン系光重合開始剤、又は/及び下記式(III)で表される基を有するアシルホスフィンオキサイド系光重合開始剤よりなる群から選択される1種以上の光重合開始剤を使用することにより、高濃度で顔料を有するレジストにおいて良好な解像性を得ることが可能となる。
香酸2-エチルヘキシル(Van Dyk社製 Esolol507)等のジアルキルアミノ安息香酸エステルが挙げられる。
本実施形態の光硬化性樹脂組成物は、着色剤を配合することができる。着色剤としては、赤、青、緑、黄等の公知の着色剤を使用することができ、顔料、染料、色素のいずれでもよい。但し、環境負荷低減並びに人体への影響の観点からハロゲンを含有しないことが好ましい。
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。
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。
ジエチレングリコールモノエチルエーテルアセテート600gにオルソクレゾールノボラック型エポキシ樹脂〔大日本インキ化学工業社製、EPICLON(登録商標)N-695、軟化点95℃、エポキシ当量214、平均官能基数7.6〕1070g(グリシジル基数(芳香環総数):5.0モル)、アクリル酸360g(5.0モル)、及びハイドロキノン1.5gを仕込み、100℃に加熱攪拌し、均一溶解した。
温度計、窒素導入装置兼アルキレンオキサイド導入装置及び撹拌装置を備えたオートクレーブに、ノボラック型クレゾール樹脂(昭和高分子社製、商品名「ショーノールCRG951」、OH当量:119.4)119.4g、水酸化カリウム1.19g及びトルエン119.4gを仕込み、撹拌しつつ系内を窒素置換し、加熱昇温した。次に、プロピレンオキサイド63.8gを徐々に滴下し、125~132℃、0~4.8kg/cm2で16時間反応させた。
実施例1~13及び比較例1~3
各合成例の樹脂溶液を用い、表1に示す種々の成分、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。
*1:ZFR-1124(日本化薬社製)
*2:ZCR-1601H(日本化薬社製)
*3:2-メチル-1-(4-メチルチオフェニル)-2-モルフォリノプロパン-1-オン(チバ・ジャパン社製)
*4:エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]1,1-(O-アセチルオキシム)(チバ・ジャパン社製)
*5:エポキシ化ポリブタジエン(ダイセル化学社製)
*6:水酸基末端ポリブタジエン(出光興産社製)
*7:リポキシBPV-1X(昭和高分子社製)
*8:末端スチレンのオリゴフェニレンエーテル化合物(三菱ガス化学社製)
*9:2-メルカプトベンゾチアゾール (川口化学工業社製)
*10:1,4-ビス(3-メルカプトブチリルオキシ)ブタン(昭和電工社製)
*11:2,4,6-トリメルカプト-s-トリアジン(三協化成社製)
*12:フェノールノボラック型エポキシ樹脂(ダウケミカル社製)
*13:ビキシレノール型エポキシ樹脂(三菱化学社製)
*14:ブロックイソシアネート(旭化成ケミカルズ社製)
*15:メチル化メラミン樹脂(三和ケミカル社製)
*16:酸化防止剤(チバ・ジャパン社製)
*17:ジペンタエリスリトールヘキサアクリレート(日本化薬社製)
*18:B-30(堺化学社製)
*19:C.I.Pigment Blue 15:3
*20:C.I.Pigment Yellow 147
*21:ジプロピレングリコールモノメチルエーテル
<最適露光量>
実施例及び比較例の光硬化性・熱硬化性樹脂組成物を、銅厚35μm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60分間乾燥させる。乾燥後、高圧水銀灯(ショートアークランプ)搭載の露光装置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7段の時を最適露光量とした。
各実施例及び比較例の光硬化性樹脂組成物を、銅ベタ基板上にスクリーン印刷法により乾燥後、約25μmになるように塗布し、80℃の熱風循環式乾燥炉で30分間乾燥させた。乾燥後、1質量%炭酸ナトリウム水溶液によって現像を行い、乾燥塗膜が除去されるまでの時間をストップウォッチにより計測した。
各実施例及び比較例の組成物を、パターン形成された銅箔基板上にスクリーン印刷で乾燥後の膜厚が20μmになるように全面塗布し、80℃で30分乾燥し、室温まで放冷する。この基板に高圧水銀灯(ショートアークランプ)搭載の露光装置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2kg/cm2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、UVコンベア炉にて積算露光量1000mJ/cm2の条件で紫外線照射した後、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。
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0.5μm、金0.03μmの条件でめっきを行い、テープピールにより、レジスト層の剥がれの有無やめっきのしみ込みの有無を評価した後、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。
△:めっき後にほんの僅かしみ込みが見られ、テープピール後に剥がれも見られる。
×:めっき後に剥がれが有る。
クシ型電極(ライン/スペース=50μm/50μm)が形成された基板に、ソルダーレジストを塗布し、露光・現像した後、熱硬化して、評価基板を作製した。この評価基板を、130℃、湿度85%の雰囲気下の高温高湿槽に入れ、電圧5Vを荷電し、192時間、HAST(Highly Accelerated Stress Test)を行った。そして、HAST後の電気絶縁性を測定した。
2mmの銅ラインパターンが形成された基板に、ソルダーレジストを塗布し、露光・現像した後、熱硬化して、銅ライン上に3mm角のレジストパターンが形成された評価基板を作製した。この評価基板を、-65℃と150℃の間で温度サイクルが行われる冷熱サイクル機に入れ、TCT(Thermal Cycle Test)を行った。そして、600サイクル時、800サイクル時および1000サイクル時の外観を観察した。
◎:1000サイクルで異常なし。
○:800サイクルで異常なし、1000サイクルでクラック発生。
△:600サイクルで異常なし、800サイクルでクラック発生。
×:600サイクルでクラック発生。
ソルダーレジスト硬化塗膜を形成した評価基板を、PCT装置(エスペック社製 HAST SYSTEM TPC-412MD)を用いて、121℃、飽和、0.2MPaの条件で168、192時間PCT(Pressure Cooker Test)を行った。PCT後の塗膜の状態を評価した。判定基準は以下の通りである。
◎:192時間膨れ、剥がれ、変色、溶出のないもの。
○:168時間膨れ、剥がれ、変色、溶出のないもの。
△:若干の膨れ、剥がれ、変色、溶出があるもの。
×:膨れ、剥がれ、変色、溶出が多く見られるもの。
実施例2及び比較例1の樹脂組成物を、以下に示す方法にて評価基板を作成し、同様に評価を行った。
実施例2及び比較例1の樹脂組成物をそれぞれメチルエチルケトンで適宜希釈した後、アプリケーターを用いて、乾燥後の膜厚が20μmになるようにPETフィルム(東レ社製 FB-50:16μm)に塗布し、80℃で30分乾燥させドライフィルムを得た。
<基板作製>
回路形成された基板をバフ研磨した後、ドライフィルムを真空ラミネーター(名機製作所製 MVLP(登録商標)-500)を用いて加圧度:0.8MPa、70℃、1分、真空度:133.3Paの条件で加熱ラミネートして、未露光のソルダーレジスト層を有する基板(未露光の基板)を得た。
評価結果を表2に示す。
Claims (5)
- カルボキシル基含有樹脂、光重合開始剤、ビニル基含有エラストマー、スチリル基含有化合物を含むことを特徴とする光硬化性樹脂組成物。
- メルカプト化合物を含むことを特徴とする請求項1に記載の光硬化性樹脂組成
物。 - 請求項1または2に記載の光硬化性樹脂組成物を、フィルム上に塗布乾燥して得られることを特徴とするドライフィルム。
- 請求項1または2に記載の光硬化性樹脂組成物を基材に塗布乾燥して得られる乾燥塗膜、または前記光硬化性樹脂組成物をフィルム上に塗布乾燥して得られるドライフィルムを基材にラミネートして得られる塗膜を、活性エネルギー線の照射により光硬化させて得られることを特徴とする硬化物。
- 請求項1または2に記載の光硬化性樹脂組成物を基材に塗布乾燥して得られる乾燥塗膜、または前記光硬化性樹脂組成物をフィルム上に塗布乾燥して得られるドライフィルムを基材にラミネートして得られる塗膜を、活性エネルギー線の照射により光硬化させて得られる硬化物のパターンを有することを特徴とするプリント配線板。
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| CN201080032508.XA CN102471424B (zh) | 2009-07-21 | 2010-07-21 | 光固化性树脂组合物 |
| US13/384,716 US8765831B2 (en) | 2009-07-21 | 2010-07-21 | Photocurable resin composition |
| KR1020127001503A KR101372116B1 (ko) | 2009-07-21 | 2010-07-21 | 광경화성 수지 조성물 |
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| JP2009170304A JP5439075B2 (ja) | 2009-07-21 | 2009-07-21 | 光硬化性樹脂組成物 |
| JP2009-170304 | 2009-07-21 |
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| KR (1) | KR101372116B1 (ja) |
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| JP5415923B2 (ja) | 2009-12-14 | 2014-02-12 | 太陽ホールディングス株式会社 | 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 |
| KR101629064B1 (ko) * | 2013-02-21 | 2016-06-21 | 주식회사 엘지화학 | 자외선 차단 기능이 우수한 광학 필름 및 이를 포함하는 편광판 |
| JP5507023B1 (ja) * | 2013-08-28 | 2014-05-28 | 太陽インキ製造株式会社 | 感光性樹脂組成物、ドライフィルム、硬化物およびプリント配線板 |
| JP5723958B1 (ja) * | 2013-12-02 | 2015-05-27 | 太陽インキ製造株式会社 | 感光性樹脂組成物、ドライフィルム、硬化物およびプリント配線板 |
| JP6368984B2 (ja) * | 2014-04-15 | 2018-08-08 | 株式会社スリーボンド | 光硬化性組成物 |
| US9650716B2 (en) * | 2015-01-22 | 2017-05-16 | Eastman Kodak Company | Patterning continuous webs with protected electrically-conductive grids |
| EP3663369A4 (en) * | 2017-08-02 | 2021-05-05 | Kao Corporation | AQUATIC PIGMENT DISPERSION |
| TWI813852B (zh) * | 2019-02-12 | 2023-09-01 | 日商納美仕有限公司 | 光硬化性樹脂組成物、包含該組成物的薄膜、使該組成物或該薄膜硬化而得的硬化物、配線構造體、電子構件、及半導體裝置 |
| WO2021259610A1 (en) | 2020-06-22 | 2021-12-30 | Huntsman Advanced Materials Licensing (Switzerland) Gmbh | A photocurable composition |
| US20240174883A1 (en) * | 2021-04-15 | 2024-05-30 | Dic Corporation | Aqueous pigment dispersion, inkjet ink, and method for producing printed material |
| US12247133B2 (en) * | 2022-02-17 | 2025-03-11 | Canon Kabushiki Kaisha | Photocurable composition including a reactive polymer |
| JP2023183616A (ja) * | 2022-06-16 | 2023-12-28 | Dic株式会社 | 硬化性樹脂組成物、硬化物、絶縁材料及びレジスト部材 |
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| JP2011026370A (ja) | 2011-02-10 |
| CN102471424B (zh) | 2015-02-18 |
| KR20120036988A (ko) | 2012-04-18 |
| US20120125672A1 (en) | 2012-05-24 |
| JP5439075B2 (ja) | 2014-03-12 |
| CN102471424A (zh) | 2012-05-23 |
| US8765831B2 (en) | 2014-07-01 |
| KR101372116B1 (ko) | 2014-03-07 |
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