WO2023120352A1 - 感光性樹脂組成物、硬化物、硬化物の製造方法、有機el表示装置および表示装置 - Google Patents
感光性樹脂組成物、硬化物、硬化物の製造方法、有機el表示装置および表示装置 Download PDFInfo
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- WO2023120352A1 WO2023120352A1 PCT/JP2022/046156 JP2022046156W WO2023120352A1 WO 2023120352 A1 WO2023120352 A1 WO 2023120352A1 JP 2022046156 W JP2022046156 W JP 2022046156W WO 2023120352 A1 WO2023120352 A1 WO 2023120352A1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
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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
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/037—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polyamides or polyimides
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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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images
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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
- G03F7/26—Processing photosensitive materials; 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
Definitions
- the invention relates to a photosensitive resin composition that can be suitably used for planarizing layers, insulating layers, etc. of organic EL display devices.
- an organic EL display device has a drive circuit, a planarizing layer, a first electrode, an insulating layer, a light-emitting layer and a second electrode on a substrate, and a voltage is applied between the first electrode and the second electrode facing each other. can be applied to emit light.
- a photosensitive resin composition that can be patterned by ultraviolet irradiation is generally used as the flattening layer material and the insulating layer material.
- a photosensitive resin composition using a polyimide-based resin has high heat resistance of the resin and little gas component generated from the cured product, so that it is preferably used in terms of obtaining a highly reliable organic EL display device. ing.
- a method of adding a coloring agent such as for example, a method of adding an esterified quinonediazide compound and at least one colorant selected from dyes, inorganic pigments, and organic pigments to an alkali-soluble heat-resistant resin (see Patent Document 1), a quinonediazide compound to an alkali-soluble resin, and an alkaline developer.
- Patent Document 2 a method of adding an acid dye soluble in both organic solvents (see Patent Document 2), a photosensitive agent and yellow, red, blue dyes and / or pigments in an alkali-soluble resin made of polyimide and / or polyimide precursor a method of adding (see Patent Document 3), and the like.
- the photosensitive resin composition of the present invention comprises an alkali-soluble resin (a), an ionic dye (b) that forms an ion pair between organic ions in molecules, and a photosensitive compound (c). ), wherein n types of the ionic dye (b) are included, and (n+1) types of organic ions are contained in the photosensitive resin composition. (n represents an integer of 2 to 10.)
- the photosensitive resin composition of the present invention has high sensitivity, can form patterns without residue, and has high storage stability during frozen storage.
- FIG. 1 is a cross-sectional view of an example of an organic EL display device
- FIG. 1 is a cross-sectional view of an example of a display device
- FIG. It is a schematic diagram of the manufacturing procedure of the organic EL display device in the example.
- the photosensitive resin composition of the present invention is a photosensitive resin containing an alkali-soluble resin (a), an ionic dye (b) that forms an ion pair between organic ions in molecules, and a photosensitive compound (c).
- the composition contains n types of the ionic dye (b), and (n+1) types of organic ions are contained in the photosensitive resin composition. (n represents an integer of 2 to 10.)
- the photosensitive resin composition of the present invention contains an alkali-soluble resin (a). Alkali solubility means that a solution obtained by dissolving a resin in ⁇ -butyrolactone is coated on a silicon wafer and prebaked at 120° C.
- a prebaked film having a film thickness of 10 ⁇ m ⁇ 0.5 ⁇ m. It refers to a dissolution rate of 50 nm/min or more, which is obtained from the decrease in film thickness when the film is immersed in a 2.38% by mass tetramethylammonium hydroxide aqueous solution at ⁇ 1° C. for 1 minute and then rinsed with pure water.
- the alkali-soluble resin (a) is alkali-soluble, it has hydroxyl groups and/or acidic groups in the structural units of the resin and/or at the ends of its main chain.
- the acidic group can have, for example, a carboxy group, a phenolic hydroxyl group, a sulfonic acid group, and the like.
- alkali-soluble resin (a) examples include polyimides, polyimide precursors, polybenzoxazoles, polybenzoxazole precursors, polyamideimides, polyamideimide precursors, polyamides, polymers of radically polymerizable monomers having acidic groups, phenolic resins, and the like. can contain, but is not limited to, The photosensitive resin composition of the present invention may contain two or more of these resins.
- the adhesiveness to development is high, the heat resistance is excellent, and the amount of outgassing at high temperatures is small, so that the cured product has high long-term reliability when used in an organic EL display device.
- polyimide, polyimide precursors, polybenzoxazole, polybenzoxazole precursors, polyamideimide, polyamideimide precursors and copolymers thereof preferably contains one or more selected from the group consisting of polyimide, More preferred are polyimide precursors, polybenzoxazole precursors, and copolymers thereof. Furthermore, a polyimide precursor or a polybenzoxazole precursor is more preferable from the viewpoint of further improving the sensitivity.
- the polyimide precursor refers to a resin that is converted to polyimide by heat treatment or chemical treatment, and may contain, for example, polyamic acid, polyamic acid ester, and the like.
- a polybenzoxazole precursor refers to a resin that is converted to polybenzoxazole by heat treatment or chemical treatment, and may contain, for example, polyhydroxyamide.
- the polyimide precursor and polybenzoxazole precursor described above have a structural unit represented by the following formula (2), and the polyimide has a structural unit represented by the following formula (3). Two or more of these may be contained, or a resin obtained by copolymerizing the structural unit represented by formula (2) and the structural unit represented by formula (3) may be contained.
- X represents an organic group having 4 to 40 carbon atoms and 2 to 8 valences
- Y represents an organic group having 6 to 40 carbon atoms and 2 to 11 valences
- R 11 and R 13 each independently represent a hydroxyl group or a sulfonic acid group
- R 12 and R 14 each independently represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms.
- t, u and w represent an integer of 0-3, and v represents an integer of 0-6.
- the structural unit represented by formula (2) represents the structural unit of the polyimide precursor
- u ⁇ 2 represents the structural unit of the polybenzoxazole precursor.
- v ⁇ 2 at least two of the plurality of R 13 are hydroxyl groups.
- E represents an organic group having 4 to 40 carbon atoms and 4 to 10 valences
- G represents an organic group having 6 to 40 carbon atoms and 2 to 8 valences
- R 15 and R 16 each independently represent a carboxy group, a sulfonic acid group or a hydroxyl group
- x and y each independently represent an integer of 0 to 6; However, x+y>0.
- the polyimide, polyimide precursor, polybenzoxazole precursor or copolymer thereof preferably has 5 to 100000 structural units represented by formula (2) or formula (3). Moreover, in addition to the structural unit represented by Formula (2) or Formula (3), it may have other structural units. In this case, it is preferable that the structural units represented by formula (2) or formula (3) account for 50 mol % or more of all structural units.
- X(R 11 ) t (COOR 12 ) u represents an acid residue.
- X is a divalent to octavalent organic group having 4 to 40 carbon atoms, preferably a divalent to octavalent organic group containing an aromatic ring or a cycloaliphatic group.
- Examples of acid residues represented by X(R 11 ) t (COOR 12 ) u include terephthalic acid, isophthalic acid, diphenyletherdicarboxylic acid, bis(carboxyphenyl)hexafluoropropane, biphenyldicarboxylic acid, benzophenonedicarboxylic acid, tri Residues of dicarboxylic acids such as phenyldicarboxylic acid, residues of tricarboxylic acids such as trimellitic acid, trimesic acid, diphenylethertricarboxylic acid, biphenyltricarboxylic acid, pyromellitic acid, 3,3′,4,4′-biphenyltetracarboxylic acid acid, 2,3,3′,4′-biphenyltetracarboxylic acid, 2,2′,3,3′-biphenyltetracarboxylic acid, 3,3′,4,4′-benzophenonetetracar
- R20 represents an oxygen atom, C( CF3 ) 2 or C( CH3 ) 2 .
- R 21 and R 22 each independently represent a hydrogen atom or a hydroxyl group.
- E(R 15 ) x represents a residue of an acid dianhydride.
- E is an organic group having 4 to 40 carbon atoms and a tetravalent to 10 valent group, preferably an organic group containing an aromatic ring or a cycloaliphatic group.
- acid dianhydride residue represented by E(R 15 ) x include pyromellitic dianhydride, 3,3′,4,4′-biphenyltetracarboxylic dianhydride, 2,3,3′,4′-biphenyltetracarboxylic dianhydride, 2,2′,3,3′-biphenyltetracarboxylic dianhydride, 3,3′,4,4′-benzophenonetetracarboxylic acid dianhydride, 2,2′,3,3′-benzophenonetetracarboxylic dianhydride, 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride, 2,2-bis(2,3 -dicarboxyphenyl)propane dianhydride, 1,1-bis(3,4-dicarboxyphenyl)ethane dianhydride, 1,1-bis(2,3-dicarboxyphenyl)ethane dianhydride, bis( 3,4
- R20 represents an oxygen atom, C( CF3 ) 2 or C( CH3 ) 2 .
- R 21 and R 22 each independently represent a hydrogen atom or a hydroxyl group.
- Y(R 13 ) v (COOR 14 ) w in formula (2) and G(R 16 ) y in formula (3) represent diamine residues.
- Y is an organic group having 6 to 40 carbon atoms and 2 to 11 valences, preferably a 2 to 11 valences organic group containing an aromatic ring or a cycloaliphatic group.
- G is a divalent to octavalent organic group having 6 to 40 carbon atoms, preferably a divalent to octavalent organic group containing an aromatic ring or a cycloaliphatic group.
- diamine residues represented by Y(R 13 ) v (COOR 14 ) w and G(R 16 ) y include 3,4′-diaminodiphenyl ether, 4,4′-diaminodiphenyl ether, 3,4'-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane, 1,4-bis(4-aminophenoxy)benzene, benzidine, m-phenylenediamine, p-phenylenediamine, 1,5-naphthalenediamine, 2, 6-naphthalenediamine, bis(4-aminophenoxy)biphenyl, bis ⁇ 4-(4-aminophenoxy)phenyl ⁇ ether, 1,4-bis(4-aminophenoxy)benzene, 2,2'-dimethyl-4, 4'-diaminobiphenyl, 2,2'-diethyl-4,4'-diaminobiphenyl
- R 20 represents an oxygen atom, C(CF 3 ) 2 or C(CH 3 ) 2 .
- R 21 to R 24 each independently represent a hydrogen atom or a hydroxyl group. Also, the ends of these resins may be capped with a known monoamine, acid anhydride, acid chloride, monocarboxylic acid or active ester compound having an acidic group.
- Alkali-soluble resin (a) may be synthesized by a known method.
- Examples of a method for producing a polyamic acid, which is a polyimide precursor, include a method of reacting a tetracarboxylic dianhydride and a diamine compound in a solvent at a low temperature.
- a diester is obtained with a tetracarboxylic dianhydride and an alcohol, and then a condensing agent
- esterification agent is not particularly limited, and a known method can be applied.
- N,N-dimethylformamide dialkyl acetal is preferable because the obtained resin can be easily purified.
- a method for producing polyhydroxyamide, which is a polybenzoxazole precursor includes, for example, a method of subjecting a bisaminophenol compound and dicarboxylic acid to a condensation reaction in a solvent. Specifically, for example, a method of reacting a dehydration condensing agent such as dicyclohexylcarbodiimide (DCC) with an acid, and then adding a bisaminophenol compound thereto.
- DCC dicyclohexylcarbodiimide
- a method of dropping a solution of a dicarboxylic acid dichloride into a solution of a bisaminophenol compound to which a tertiary amine such as pyridine is added can be used.
- Methods for producing polyimide include, for example, a method of dehydrating and ring-closing the polyamic acid or polyamic acid ester obtained by the above method in a solvent.
- Methods for dehydration and ring closure include chemical treatment with an acid or base, heat treatment, and the like.
- Methods for producing polybenzoxazole include, for example, a method of dehydrating and ring-closing the polyhydroxyamide obtained by the above method in a solvent.
- Methods for dehydration and ring closure include chemical treatment with an acid or base, heat treatment, and the like.
- Polyamideimide precursors include tricarboxylic acids, corresponding tricarboxylic acid anhydrides, and polymers of tricarboxylic acid anhydride halides and diamine compounds. Polymers of trimellitic anhydride chloride and aromatic diamine compounds are preferred.
- Examples of the method for producing a polyamideimide precursor include a method of reacting a tricarboxylic acid, a corresponding tricarboxylic acid anhydride, a tricarboxylic acid anhydride halide, etc. with a diamine compound in a solvent at a low temperature.
- Examples of methods for producing polyamideimide include a method of reacting trimellitic anhydride and an aromatic diisocyanate in a solvent, and a method of dehydrating and ring-closing the polyamideimide precursor obtained by the above method in a solvent.
- Methods for dehydration and ring closure include chemical treatment with an acid or base, heat treatment, and the like.
- polymers of radically polymerizable monomers include acrylic resins and polyhydroxystyrene resins.
- Known materials can be used as radically polymerizable monomers, and examples include o-hydroxystyrene, m-hydroxystyrene and p-hydroxystyrene, alkyl- and alkoxy-substituted products thereof, methacrylic acid and acrylic acid, and Haloalkyl, alkoxy, halogen, nitro, and cyano substituted products of these ⁇ -positions can be mentioned.
- o-hydroxystyrene, m-hydroxystyrene and p-hydroxystyrene, and their alkyl- and alkoxy-substituted products are highly effective in improving sensitivity and resolution during patterning, film retention after development, heat distortion resistance, and resistance to heat distortion. It is preferably used from the viewpoints of solvent property, adhesion to the substrate, storage stability of the solution, and the like. These can be used alone or in combination of two or more.
- radically polymerizable monomers known materials can be used.
- Haloalkyl, nitro, cyano, amide, ester-substituted products, diolefins such as butadiene and isoprene, esters of methacrylic acid or acrylic acid, and the like can be used. These can be used alone or in combination of two or more.
- the polymerization solvent is not particularly limited, and includes alkylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether and propylene glycol monomethyl ether, alkyl acetates such as propyl acetate, butyl acetate, and isobutyl acetate, methyl isobutyl ketone, methyl propyl ketone, and the like.
- ketones alcohols such as butyl alcohol and isobutyl alcohol, ethyl lactate, butyl lactate, dipropylene glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, 3-methoxybutyl acetate, ethylene glycol monoethyl ether acetate, gamma-butyrolactone, N-methyl-2-pyrrolidone, diacetone alcohol, N-cyclohexyl-2-pyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylsulfoxide, propylene glycol monomethyl ether acetate, N,N- dimethylisobutyamide, 3-methoxy-N,N-dimethylpropionamide, 3-butoxy-N,N-dimethylpropionamide, 1,3-dimethyl-2-imidazolidinone, N,N-dimethylpropy
- the photosensitive resin composition of the present invention further contains n kinds of ionic dyes (b) (hereinafter sometimes referred to as ionic dyes (b)) that form ion pairs of organic ions between molecules. and the organic ions contained in the photosensitive resin composition are (n+1) species. However, n represents an integer of 2 to 10, and the organic ion represents an ion of an organic compound containing carbon.
- the photosensitive resin composition contains n types of ionic dyes (b) having different organic anion moieties and different organic cation moieties, the number of organic ions contained in the photosensitive resin composition is (n ⁇ 2).
- the photosensitive resin composition of the present invention contains n types of ionic dyes (b), and the organic ions contained in the photosensitive resin composition are (n+1) types, thereby maintaining sensitivity and eliminating residues. While suppressing it, the storage stability during frozen storage is improved. It is presumed that this is because the ion exchange between the ionic dyes in the photosensitive resin composition was suppressed by limiting the organic ion species for the ionic dye (b).
- n kinds of ionic dyes (b) are included and the number of organic ions contained in the photosensitive resin composition satisfies (n+1) kinds
- the organic anion portion of the n kinds of ionic dyes (b) or the organic A case where all the cation moieties are the same is mentioned.
- n 3
- n ⁇ 3 As a second mode, there is a case where two or more of each of the organic anion moieties and the organic cation moieties of the n ionic dyes (b) are the same.
- n 3
- the organic anion moieties of the ionic dyes 1 and 2 are the same
- the organic cation moieties of the ionic dyes 1 and 3 are the same.
- the first form is preferable from the viewpoint of suppressing ion exchange between ionic dyes and enhancing storage stability during frozen storage. From the viewpoint of enhancing storage stability, n is preferably 2 to 5, more preferably 2 to 3, and even more preferably 2.
- the ionic dye (b) that forms an ion pair between organic ions between molecules in the present invention is a salt-forming compound consisting of an acid dye organic anion portion and a non-dye organic cation portion, and an organic cation of a basic dye. It refers to a salt-forming compound consisting of a moiety and an organic anion moiety of a non-dye, or a salt-forming compound consisting of an organic anion moiety of an acid dye and an organic cation moiety of a basic dye.
- the ionic dye of the present invention is composed of the organic anion portion of the acid dye and the organic cation portion of the basic dye. It is preferable to contain a salt-forming compound.
- a salt-forming compound consisting of an acid dye organic anion portion and a non-dye organic cation portion can be produced by using an acid dye as a raw material and exchanging the counter cation with a non-dye organic cation by a known method.
- a salt-forming compound comprising a basic dye organic cation moiety and a non-dye organic anion moiety can be produced by using a basic dye as a raw material and exchanging the counter anion with a non-dye organic anion by a known method.
- a salt-forming compound comprising an organic anion portion of an acid dye and an organic cation portion of a basic dye can be produced by using an acid dye and a basic dye as starting materials and exchanging their counter ions by a known method.
- the acid dye that is the raw material for the ionic dye (b) is a compound that has an acidic substituent such as a sulfo group or a carboxy group in the dye molecule, or an anionic water-soluble dye that is a salt thereof.
- Acid dyes include those that have an acidic substituent such as a sulfo group or a carboxy group and are classified as direct dyes.
- an acid dye for example, C.I. I. Acid Yellow 1, 17, 18, 23, 25, 36, 38, 42, 44, 54, 59, 72, 78, 151; C.I. I. Acid Orange 7, 10, 12, 19, 20, 22, 28, 30, 52, 56, 74, 127; C.I. I. acid red 1, 3, 4, 6, 8, 11, 12, 14, 18, 26, 27, 33, 37, 53, 57, 88, 106, 108, 111, 114, 131, 137, 138, 151, 154, 158, 159, 173, 184, 186, 215, 257, 266, 296, 337; I. Acid Brown 2, 4, 13, 248; C.I. I. Acid Violet 11, 56, 58; C.I. I.
- azo acid dyes such as Acid Blue 92, 102, 113, 117; C.I. I. Quinoline acid dyes such as Acid Yellow 2, 3, 5; C.I. I. Xanthene acid dyes such as Acid Red 50, 51, 52, 87, 91, 92, 93, 94, 289; C.I. I. Acid Red 82, 92; C.I. I. Acid Violet 41, 42, 43; C.I. I. Acid Blue 14, 23, 25, 27, 40, 45, 78, 80, 127: 1, 129, 145, 167, 230; C.I. I. Anthraquinone acid dyes such as Acid Green 25, 27; C.I. I. Acid Violet 49; C.I. I.
- the acid dye preferably contains a xanthene-based acid dye in terms of high heat resistance.
- Xanthene-based acid dyes include C.I. I. It is more preferable to contain a rhodamine-based acid dye such as Acid Red 50, 52, 289.
- Each R in the ionic formula may independently have a substituent and is a hydrocarbon group having 1 to 20 carbon atoms which may have a heteroatom in the carbon chain.
- the molecular weight of the non-dye organic cation moiety is preferably 1000 or less, preferably 700 or less, and 400 or less. is more preferred.
- the lower limit of the molecular weight of the non-dye organic cation moiety is not particularly limited, it is preferably 1 or more, more preferably 100 or more.
- a basic dye used as a raw material for the ionic dye (b) is a compound having a basic group such as an amino group or an imino group in the molecule, or a salt thereof, and is a dye that becomes a cation in an aqueous solution. is.
- basic dyes for example, C.I. I. Basic Red 17, 22, 23, 25, 29, 30, 38, 39, 46, 46: 1, 82; I. Basic Orange 2, 24, 25; C.I. I. Basic Violet 18; C.I. I. Basic Yellow 15, 24, 25, 32, 36, 41, 73, 80; C.I. I. Basic Brown 1; C.I. I. azo basic dyes such as Basic Blue 41, 54, 64, 66, 67, 129; C.I. I. Basic Red 1, 2; C.I. I. Xanthene-based basic dyes such as Basic Violet 10, 11; C.I. I. Basic Yellow 11, 13, 21, 23, 28; C.I. I. Basic Orange 21; C.I. I. Basic Red 13, 14; C.I. I.
- basic methine dyes such as Basic Violet 16, 39; C.I. I. anthraquinone-based basic dyes such as Basic Blue 22, 35, 45, 47; C.I. I. Basic Violet 1, 2, 3, 4, 13, 14, 23; C.I. I. Basic Blue 1, 5, 7, 8, 11, 15, 18, 21, 24, 26; C.I. I. Examples thereof include triarylmethane-based basic dyes such as Basic Green 1 and 4, and xanthene-based basic dyes having a structure represented by the following formula (9) or (10).
- R 25 to R 31 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms which may have a substituent.
- the basic dye preferably contains a xanthene-based basic dye and a triarylmethane-based basic dye in terms of increasing the blackness of the cured film. It preferably contains a dye.
- non-dye organic anions used as raw materials for the ionic dye (b) include aliphatic or aromatic sulfonate ions, aliphatic or aromatic carboxylate ions, and sulfonimide anions [(RSO 2 ) 2 N ] - , borate anion (BR 4 ) - and the like.
- the anion compound is an aliphatic or aromatic sulfonate ion, an aliphatic or aromatic carboxylate ions are preferred.
- each R in the ionic formula may independently have a substituent and is a hydrocarbon group having 1 to 20 carbon atoms which may have a heteroatom in the carbon chain.
- the molecular weight of the non-dye organic anion portion is preferably 1000 or less, preferably 700 or less, and 400 or less. is more preferred.
- the lower limit of the molecular weight of the non-dye anion portion is not particularly limited, it is preferably 1 or more, more preferably 100 or more.
- the organic anion portion and/or the organic cation portion of the ionic dye (b) preferably has a xanthene skeleton.
- Examples of the organic anions having a xanthene skeleton include the xanthene-based acid dyes described above, and examples of the organic cations having a xanthene skeleton include the xanthene-based basic dyes described above.
- At least one preferably has a xanthene skeleton in the organic anion portion and/or the organic cation portion, and when n ⁇ 3, two or more kinds have the organic anion portion and/or It is more preferable to have a xanthene skeleton in the organic cation part, and it is more preferable that all of the n species have a xanthene skeleton in the organic anion part and/or the organic cation part.
- the ionic dye (b) preferably has an acidic group from the viewpoint of increasing alkali solubility during development and improving sensitivity.
- the acidic group can have, for example, at least one group selected from the group consisting of a carboxy group, a phenolic hydroxyl group, a sulfonic acid group and a sulfonate group, and a sulfonic acid group and/or a sulfonate group are particularly preferred. .
- a salt-forming compound by ion exchange of an acid dye or a basic dye can be produced by a known method. For example, when an aqueous solution of an acid dye and an aqueous solution of a basic dye are separately prepared and mixed slowly while stirring, a salt-forming compound consisting of an organic anion portion of the acid dye and an organic cation portion of the basic dye is formed as a precipitate. Generate. By collecting this by filtration, the salt-forming compound can be obtained. The obtained salt-forming compound is preferably dried at about 60 to 70°C.
- the total content of the two or more ionic dyes (b) contained in the photosensitive resin composition of the present invention is 0.1 parts by mass or more and 300 parts by mass or less with respect to 100 parts by mass of the alkali-soluble resin (a). is preferred, more preferably 0.2 parts by mass or more and 200 parts by mass or less, and particularly preferably 1 part by mass or more and 200 parts by mass or less.
- the content of the ionic dye (b) is 0.1 parts by mass or more, light of the corresponding wavelength can be absorbed. Also, by making it 300 parts by mass or less, it is possible to absorb the light of the corresponding wavelength while maintaining the adhesive strength between the photosensitive colored resin film and the substrate and the heat resistance and mechanical properties of the film after heat treatment.
- the ionic dye (b) of the present invention is an ionic dye (b1) having a maximum absorption wavelength in any of the range of 490 nm or more and less than 580 nm at 350 to 800 nm (hereinafter sometimes referred to as the ionic dye (b1) ) and an ionic dye (b2) (hereinafter sometimes referred to as an ionic dye (b2)) having a maximum absorption wavelength in any of the range of 580 nm or more and less than 800 nm in the range of 350 to 800 nm. preferable.
- the ionic dye (b1) has a maximum absorption wavelength in any range of 490 nm or more and less than 580 nm in the range of 350 to 800 nm, and thus includes, for example, red dyes and violet dyes.
- the ionic dye (b2) has a maximum absorption wavelength in the range of 580 nm or more and 800 nm or less in the range of 350 to 800 nm, and thus includes blue dyes and green dyes.
- the ionic dye (b) is an ionic dye (b3) (hereinafter referred to as an ionic may be referred to as a sexual dye (b3)).
- an ionic dye (b3) hereinafter referred to as an ionic may be referred to as a sexual dye (b3).
- the photosensitive resin composition of the present invention reduces the visible light transmittance of the cured product, It is possible to Since the ionic dye (b3) has a maximum absorption in any wavelength range of 400 nm or more and less than 490 nm, examples thereof include yellow dyes and orange dyes.
- the photosensitive resin composition of the present invention further contains a photosensitive compound (c).
- the content of the photosensitive compound (c) is preferably 0.1 parts by mass or more, more preferably 1 part by mass or more with respect to 100 parts by mass of the alkali-soluble resin (a), from the viewpoint of increasing sensitivity. Part by mass or more is more preferable.
- the content is preferably 100 parts by mass or less.
- the photosensitive compound (c) may contain a photoacid generator (c1), a photopolymerization initiator (c2), and the like.
- the photoacid generator (c1) is a compound that generates an acid upon exposure to light
- the photopolymerization initiator (c2) is a compound that undergoes bond cleavage and/or reaction upon exposure to generate radicals.
- the photoacid generator (c1) By containing the photoacid generator (c1), an acid is generated in the light-irradiated area and the solubility of the light-irradiated area in an alkaline aqueous solution increases, so that a positive relief pattern in which the light-irradiated area dissolves can be obtained. can. Further, by containing the photoacid generator (c1) and an epoxy compound or a thermal cross-linking agent described later, the acid generated in the light-irradiated portion accelerates the cross-linking reaction of the epoxy compound or the thermal cross-linking agent, and the light-irradiated portion becomes insoluble. A negative relief pattern can be obtained.
- the photosensitive compound (c) is a photoacid that can obtain a positive relief pattern. It preferably contains a generator (c1).
- the photoacid generator (c1) may contain, for example, a quinonediazide compound.
- the photosensitive resin composition of the present invention preferably contains two or more kinds of photoacid generators (c1). When two or more kinds of photoacid generators (c1) are contained, a photosensitive resin composition with higher sensitivity can be obtained. .
- Examples of the quinonediazide compound include those in which the sulfonic acid of quinonediazide is bonded to a polyhydroxy compound via an ester bond, the sulfonic acid of quinonediazide to a polyamino compound in a sulfonamide bond, and the sulfonic acid of quinonediazide to a polyhydroxypolyamino compound in an ester bond and/or a sulfone bond.
- An amide bond or the like can be contained.
- both a 5-naphthoquinonediazidesulfonyl group and a 4-naphthoquinonediazidesulfonyl group are preferably used. It may contain a naphthoquinone diazide sulfonyl ester compound having a 4-naphthoquinone diazide sulfonyl group and a 5-naphthoquinone diazide sulfonyl group in the same molecule, or a 4-naphthoquinone diazide sulfonyl ester compound and a 5-naphthoquinone diazide sulfonyl ester compound.
- a 4-naphthoquinonediazide sulfonyl ester compound has absorption in the i-line region of a mercury lamp and is suitable for i-line exposure.
- a 5-naphthoquinonediazide sulfonyl ester compound has absorption extending to the g-line region of a mercury lamp and is suitable for g-line exposure.
- the quinonediazide compound can be synthesized from a compound having a phenolic hydroxyl group and a quinonediazide sulfonic acid compound by any esterification reaction. By using these quinonediazide compounds, the resolution, sensitivity and film retention rate are further improved.
- the content of the photoacid generator (c1) is preferably 0.1 parts by mass or more, more preferably 10 parts by mass or more with respect to 100 parts by mass of the alkali-soluble resin (a), from the viewpoint of increasing sensitivity. More preferably 25 parts by mass or more.
- the content is preferably 100 parts by mass or less.
- Examples of the photopolymerization initiator (c2) include benzyl ketal photopolymerization initiators, ⁇ -hydroxyketone photopolymerization initiators, ⁇ -aminoketone photopolymerization initiators, acylphosphine oxide photopolymerization initiators, and oxime esters.
- photoinitiator, acridine photoinitiator, titanocene photoinitiator, benzophenone photoinitiator, acetophenone photoinitiator, aromatic ketoester photoinitiator, benzoic acid ester photoinitiator agents and the like can be contained.
- the photosensitive resin composition of the present invention may contain two or more photopolymerization initiators (c2).
- the photopolymerization initiator (c2) more preferably contains an ⁇ -aminoketone photopolymerization initiator, an acylphosphine oxide photopolymerization initiator, or an oxime ester photopolymerization initiator.
- ⁇ -aminoketone-based photopolymerization initiators examples include 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4 -morpholinophenyl)-butan-1-one, 2-dimethylamino-2-(4-methylbenzyl)-1-(4-morpholinophenyl)-butan-1-one, 3,6-bis(2-methyl- 2-morpholinopropionyl)-9-octyl-9H-carbazole and the like.
- acylphosphine oxide photopolymerization initiators include 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, and bis(2,6-dimethoxybenzoyl). )-(2,4,4-trimethylpentyl)phosphine oxide and the like.
- oxime ester photopolymerization initiators include 1-phenylpropane-1,2-dione-2-(O-ethoxycarbonyl)oxime, 1-phenylbutane-1,2-dione-2-(O-methoxy carbonyl)oxime, 1,3-diphenylpropane-1,2,3-trione-2-(O-ethoxycarbonyl)oxime, 1-[4-(phenylthio)phenyl]octane-1,2-dione-2-( O-benzoyl)oxime, 1-[4-[4-(carboxyphenyl)thio]phenyl]propane-1,2-dione-2-(O-acetyl)oxime, 1-[9-ethyl-6-(2 -methylbenzoyl)-9H-carbazol-3-yl]ethanone-1-(O-acetyl)oxime, 1-[9-ethyl-6-[2-methyl-4-[1-(2,2-di
- the content of the photopolymerization initiator (c2) is preferably 0.1 parts by mass or more with respect to a total of 100 parts by mass of the alkali-soluble resin (a) and the radically polymerizable compound described later, from the viewpoint of increasing sensitivity. It is more preferably 1 part by mass or more, and even more preferably 10 parts by mass or more. On the other hand, from the viewpoint of further improving the resolution and reducing the taper angle, it is preferably 50 parts by mass or less.
- the photosensitive resin composition of the present invention may contain a coloring agent (d) other than the ionic dye (b).
- a coloring agent (d) By including the coloring agent (d) in addition to the ionic dye (b), the colorant ( It is possible to impart a light-shielding property to block light of a wavelength that is absorbed by d).
- a light-shielding property By imparting a light-shielding property, when the cured product of the present invention described later is used as a planarizing layer and / or an insulating layer of an organic EL display device, deterioration, malfunction, leakage current, etc. due to light penetration into the TFT are prevented. be able to. Furthermore, reflection of external light from wiring and TFTs can be suppressed, and the contrast between light-emitting areas and non-light-emitting areas can be improved.
- At least one colorant (d) is preferably contained, for example, one dye or organic pigment, two or more dyes or pigments, one or more dyes and one It is preferable to contain the above pigments.
- types of nonionic dyes (d1) include oil-soluble dyes, disperse dyes, and the like.
- the coloring agent (d) in the present invention includes nonionic dyes (d1). preferable.
- the pigment (d2) is preferable from the viewpoint of suppressing fading of the colorant in the heat treatment step of the photosensitive resin composition of the present invention, which will be described later.
- the colorant (d) used in the photosensitive resin composition of the present invention includes a colorant (d-1) having a maximum absorption wavelength in any range of 400 nm or more and less than 490 nm at 350 to 800 nm, A coloring agent (d-2) having a maximum absorption wavelength in any range and a coloring agent (d-3) having a maximum absorption wavelength in any range of 580 nm or more and 800 nm or less are preferable, and these may be used in combination. .
- the coloring material (d) is a dye that is soluble in an organic solvent that dissolves the alkali-soluble resin (a) and is compatible with the resin from the viewpoint of storage stability, curing, and fading during light irradiation. It is preferable to contain a dye having high resistance and light resistance.
- the skeleton structure of the nonionic dye (d1) includes, but is not limited to, anthraquinone, azo, phthalocyanine, methine, oxazine, quinoline, triarylmethane, xanthene, and the like.
- anthraquinone-based, azo-based, methine-based, triarylmethane-based, and xanthene-based solvents are preferred from the viewpoint of solubility in organic solvents and heat resistance.
- Xanthene-based resins are more preferable from the viewpoint of high heat resistance.
- the content of the coloring agent (d) is preferably 0.1 to 300 parts by mass, more preferably 0.2 to 200 parts by mass, particularly 1 to 200 parts by mass, relative to 100 parts by mass of the alkali-soluble resin (a). is preferred.
- the content of the coloring agent (d) is 0.1 parts by mass or more, the light of the corresponding wavelength can be absorbed. Also, by making it 300 parts by mass or less, it is possible to absorb the light of the corresponding wavelength while maintaining the adhesive strength between the photosensitive colored resin film and the substrate and the heat resistance and mechanical properties of the film after heat treatment.
- the photosensitive resin composition of the present invention further comprises an aromatic hydrocarbon (f) having at least one aromatic C—H bond and at least three phenolic hydroxyl groups in one aromatic ring (hereinafter referred to as compound (f) ) is preferably included.
- compound (f) an aromatic hydrocarbon having at least one aromatic C—H bond and at least three phenolic hydroxyl groups in one aromatic ring
- compound (g) the triazine ring-containing compound represented by formula (1) described later
- a cross-linking reaction proceeds with the compound (g) contained in the compound (f) by heating, and the cross-linked product takes a quinone structure, thereby absorbing in the wavelength region of 300 nm to 500 nm. It is believed that a chromogenic body having Since the cross-linking reaction does not depend on the heating atmosphere during curing, the transmittance in the wavelength range of 300 nm to 500 nm can be reduced after curing without being subject to restrictions on curing conditions. In addition, in the state before heating, both compound (f) and compound (g) do not have absorption in the wavelength range of 300 nm to 500 nm. It is possible to form a pattern with high sensitivity without blocking light. Furthermore, by containing the ionic dye (b1) and the ionic dye (b2), it is possible to obtain a film having high visible light shielding properties after curing.
- the aromatic hydrocarbon structure possessed by compound (f) includes known monocyclic and condensed polycyclic structures. Also, the aromatic hydrocarbon has at least one aromatic C—H bond and at least three phenolic hydroxyl groups within one aromatic ring. An aromatic hydrocarbon having at least one aromatic C—H bond in one aromatic ring means that one or more unsubstituted aromatic C—H bonds are present in the aromatic. In addition, "within one aromatic ring” means having a predetermined configuration "within a single aromatic ring", for example, an aromatic ring having at least one aromatic C-H bond and one phenolic hydroxyl group A compound having three rings is not included in the aspect of compound (f). Specific examples of the compound (f) include, but are not limited to, structures represented by the following formula (11).
- R 7 independently represents a monovalent organic group having 1 to 20 carbon atoms, k represents an integer of 0 to 2, l represents an integer of 0 to 6, and m represents an integer of 3 to 9. However, k, l and m satisfy the following relational expressions. ⁇ (2k+6)-(l+m) ⁇ 1 (equation).
- the compound (f) By having at least one aromatic C—H bond in one aromatic ring, the compound (f) can form a crosslinked body consisting of the compound (g), and the transmittance in the wavelength region of 300 nm to 500 nm after curing. can be lowered.
- One or more, preferably two or more, more preferably three or more aromatic C—H bonds in one aromatic ring contained in the compound (f) provide a cross-linking point with the compound (g).
- the transmittance in the wavelength region of 300 nm to 500 nm can be more effectively reduced after curing.
- aromatic hydrocarbons having at least one aromatic C—H bond and three phenolic hydroxyl groups in one aromatic ring include phloroglucinol, pyrogallol, 1,2.4-trihydroxybenzene, 2,4 ,5-trihydroxybenzaldehyde, 2,3,4-trihydroxybenzaldehyde, 3,4,5-trihydroxybenzaldehyde, galacetophenone, 2,3,4-trihydroxybenzoic acid, gallic acid, methyl gallate, ethyl gallate , propyl gallate, octyl gallate, 2,3,4-trihydroxybenzophenone, 2,3,4,4′-tetrahydroxybenzophenone and the like.
- aromatic hydrocarbons having at least one aromatic C—H bond and four or more phenolic hydroxyl groups in one aromatic ring include 1,2,3,4-tetrahydroxybenzene, 1,2 , 3,5-tetrahydroxybenzene, 1,2,4,5-tetrahydroxybenzene, leucoquinizarin and the like.
- At least one substitution position of the other phenolic hydroxyl group with respect to any one of the phenolic hydroxyl groups in its structure is preferably the ortho-position or the para-position.
- the substitution position is the ortho-position or the para-position, more preferably the para-position, the transmittance in the wavelength region of 300 nm to 500 nm after curing can be more effectively reduced. It is presumed that this is because the cross-linked product of compound (f) and compound (g) has an orthoquinone or paraquinone structure, thereby increasing color development.
- compounds (f1) in which at least one substitution position of another phenolic hydroxyl group with respect to any phenolic hydroxyl group is at the ortho position include, for example, pyrogallol and 1,2.4-trihydroxybenzene. , 2,4,5-trihydroxybenzaldehyde, 2,3,4-trihydroxybenzaldehyde, 3,4,5-trihydroxybenzaldehyde, galacetophenone, 2,3,4-trihydroxybenzoic acid, gallic acid, methyl gallate , ethyl gallate, propyl gallate, octyl gallate, 2,3,4-trihydroxybenzophenone, 2,3,4,4′-tetrahydroxybenzophenone, 1,2,3,4-tetrahydroxybenzene, 1, 2,3,5-tetrahydroxybenzene, 1,2,4,5-tetrahydroxybenzene and the like.
- the compound (f2) in which at least one substitution position of the other phenolic hydroxyl group with respect to any of the phenolic hydroxyl groups is at the para position includes, for example, 1,2.4-trihydroxybenzene, 2 , 4,5-trihydroxybenzaldehyde, 1,2,3,4-tetrahydroxybenzene, 1,2,3,5-tetrahydroxybenzene, 1,2,4,5-tetrahydroxybenzene, leucoquinizarin and the like.
- the molecular weight of compound (f) is preferably 1000 or less, preferably 800 or less, and more preferably 600 or less. Moreover, the molecular weight of the compound (f) is 126 or more.
- the content of the compound (f) is preferably 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the alkali-soluble resin (a).
- the content is preferably 1 part by mass or more, more preferably 5 parts by mass or more, and even more preferably 10 parts by mass or more, in combination with the compound (g) described later, the transmission in the wavelength region of 300 nm to 500 nm after curing can effectively reduce the rate.
- the content to 50 parts by mass or less, more preferably 40 parts by mass or less, more preferably 30 parts by mass or less, and even more preferably 20 parts by mass or less, the chemical resistance of the cured product can be maintained. can.
- the photosensitive resin composition of the present invention preferably further contains a triazine ring-containing compound (g) represented by formula (1) (also referred to as compound (g)).
- R 1 to R 6 are each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyl ether group having 2 to 10 carbon atoms, It represents a methylol group or an alkoxymethyl group. However, at least one of R 1 to R 6 is a methylol group or an alkoxymethyl group.
- the photosensitive resin composition of the present invention develops color by heating regardless of the atmosphere during curing, and the transmittance in the wavelength range of 300 nm to 500 nm after curing is improved. can be lowered. That is, even if the photosensitive resin composition of the present invention contains the compound (g) and the compound (f) in addition to the ionic dye (b1) and the ionic dye (b2), the visible light transmission of the cured product It is possible to lower the rate and make it black.
- At least one of R 1 to R 6 is a methylol group or an alkoxymethyl group, and the number of methylol groups or alkoxymethyl groups is preferably 2 or more, more preferably 3 or more, still more preferably 4 or more, and 6 Most preferably all are methylol groups or alkoxymethyl groups. As the number of methylol groups or alkoxymethyl groups increases, the number of cross-linking points with compound (f) increases, so that the transmittance in the wavelength region of 300 nm to 500 nm after curing can be more effectively reduced.
- alkoxymethyl group examples include methoxymethyl group, ethoxymethyl group, propoxymethyl group, and butoxymethyl group.
- the content of the compound (g) is preferably 1 part by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the alkali-soluble resin (a).
- the content is 100 parts by mass or less, more preferably 80 parts by mass or less, more preferably 50 parts by mass or less, and more preferably 30 parts by mass or less, thereby effectively increasing the sensitivity of the photosensitive resin composition. can be improved.
- the photosensitive resin composition of the present invention may contain a thermochromic compound.
- the thermochromic compound is a thermochromic compound that develops color by heat treatment and has maximum absorption at 350 nm or more and 700 nm or less, more preferably a thermochromic compound that develops color by heat treatment and has maximum absorption at 350 nm or more and 500 nm or less. is a compound.
- the photosensitive resin composition of the present invention contains a thermochromic compound in addition to the ionic dye (b1) and the ionic dye (b2), the visible light transmittance of the cured product is lowered and the cured product is blackened. Is possible.
- the thermochromic compound is preferably a compound that develops color at a temperature higher than 120°C, more preferably a thermochromic compound that develops color at a temperature higher than 180°C.
- the higher the color-developing temperature of the thermochromic compound the better the heat resistance under high-temperature conditions, and the less the color fades due to long-term irradiation with ultraviolet light and visible light, and the better the light resistance.
- thermochromogenic compound may be a general heat-sensitive dye or pressure-sensitive dye, or may be another compound.
- thermochromic compounds include those that develop color by changing their chemical structure and charge state due to the action of acidic groups coexisting in the system during heat treatment, or those that undergo a thermal oxidation reaction due to the presence of oxygen in the air. It can contain a substance that causes coloration and the like.
- the thermochromic compound of the present invention differs from the colorant (d) because it does not have a maximum absorption in any of the ranges of 350 nm or more and 700 nm or less before heat treatment.
- thermochromic compound having a triarylmethane skeleton is said to develop color when the hydrogen of the methine group is eliminated by heat treatment and one aryl group becomes a quinone structure.
- the ionic dye (b) and the coloring material (d) having a triarylmethane skeleton have a quinone structure even before heat treatment, and thus are different from the thermochromic compound of the present invention.
- the skeleton structure of the thermochromic compound includes a triarylmethane skeleton, a diarylmethane skeleton, a fluorane skeleton, a bislactone skeleton, a phthalide skeleton, a xanthene skeleton, a rhodamine lactam skeleton, a fluorene skeleton, a phenothiazine skeleton, a phenoxazine skeleton, and a spiropyran skeleton.
- a triarylmethane skeleton is preferable because of its high thermal coloring temperature and excellent heat resistance.
- triarylmethane skeleton examples include 2,4′,4′′-methylidynetrisphenol, 4,4′,4′′-methylidynetrisphenol, 4,4′-[(4-hydroxyphenyl) methylene]bis(benzenamine), 4,4'-[(4-aminophenyl)methylene]bisphenol, 4,4'-[(4-aminophenyl)methylene]bis[3,5-dimethylphenol], 4, 4′-[(2-hydroxyphenyl)methylene]bis[2,3,6-trimethylphenol], 4-[bis(4-hydroxyphenyl)methyl]-2-methoxyphenol, 4,4′-[(2 -hydroxyphenyl)methylene]bis[2-methylphenol], 4,4′-[(4-hydroxyphenyl)methylene]bis[2-methylphenol], 4-[bis(4-hydroxyphenyl)methyl]-2 -ethoxyphenol, 4,4'-[(4-hydroxyphenyl)methylene]bis[2,6-dimethylphenol],
- the hydroxyl group-containing compound having a triarylmethane skeleton may be used as a quinonediazide compound by ester-bonding the sulfonic acid of naphthoquinonediazide to the compound.
- the content when the thermochromic compound is contained, the content is preferably 5 to 80 parts by mass, particularly preferably 10 to 60 parts by mass, based on 100 parts by mass of the alkali-soluble resin (a).
- the content of the thermochromic compound is 5 parts by mass or more, the transmittance of the cured product in the ultraviolet-visible region can be reduced. Moreover, if it is 80 parts by mass or less, the heat resistance and strength of the cured product can be maintained, and the water absorption can be reduced.
- the photosensitive resin composition of the invention may contain a radically polymerizable compound.
- the photosensitive resin composition contains a photopolymerization initiator (c2)
- a radically polymerizable compound is a compound having a plurality of ethylenically unsaturated double bonds in its molecule.
- the radicals generated from the photopolymerization initiator (c2) described above promote radical polymerization of the radically polymerizable compound, and insolubilization of the light-irradiated portion can yield a negative pattern.
- the photocuring of the light-irradiated portion is accelerated, and the sensitivity can be further improved.
- the crosslink density after thermosetting is improved, the hardness of the cured product can be improved.
- a compound having a (meth)acrylic group which facilitates the progress of radical polymerization, is preferable.
- Compounds having two or more (meth)acrylic groups in the molecule are more preferable from the viewpoint of improving the sensitivity at the time of exposure and improving the hardness of the cured product.
- the double bond equivalent of the radically polymerizable compound is preferably 80 to 400 g/mol from the viewpoint of improving the sensitivity during exposure and improving the hardness of the cured product.
- radically polymerizable compounds include trimethylolpropane tri(meth)acrylate, ditrimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, and pentaerythritol tetra(meth)acrylate.
- acrylates dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol hepta(meth)acrylate, tripentaerythritol octa(meth)acrylate, 2,2-bis[4-(3-( meth)acryloxy-2-hydroxypropoxy)phenyl]propane, 1,3,5-tris((meth)acryloxyethyl)isocyanuric acid, 1,3-bis((meth)acryloxyethyl)isocyanuric acid, 9,9 -bis[4-(2-(meth)acryloxyethoxy)phenyl]fluorene, 9,9-bis[4-(3-(meth)acryloxypropoxy)phenyl]fluorene, 9,9-bis(4-( It can contain meth)acryloxyphenyl)fluorene or their acid modified products, ethylene oxide modified products, prop
- the content of the radical polymerizable compound is preferably 15 parts by mass or more with respect to a total of 100 parts by mass of the alkali-soluble resin (a) and the radical polymerizable compound. 30 parts by mass or more is more preferable.
- it is preferably 65 parts by mass or less, and 50 parts by mass with respect to the total 100 parts by mass of the alkali-soluble resin (a) and the radically polymerizable compound. The following are more preferred.
- the photosensitive resin composition of the present invention may contain a thermal cross-linking agent.
- a thermal cross-linking agent refers to a compound having at least two thermally reactive functional groups such as an alkoxymethyl group, a methylol group, an epoxy group, and an oxetanyl group in the molecule.
- cross-linking occurs between the thermal cross-linking agent and the alkali-soluble resin (a) or between the thermal cross-linking agents to improve the heat resistance, chemical resistance and bending resistance of the cured product after thermal curing.
- Preferred examples of compounds having at least two alkoxymethyl groups or methylol groups include DML-PC, DML-PEP, DML-OC, DML-OEP, DML-34X, DML-PTBP, DML-PCHP, DML-OCHP, DML-PFP, DML-PSBP, DML-POP, DML-MBOC, DML-MBPC, DML-MTrisPC, DML-BisOC-Z, DML-BisOCHP-Z, DML-BPC, DML-BisOC-P, DMO-PC, DMOM-PTBP, DMOM-MBPC, TriML-P, TriML-35XL, TML-HQ, TML-BP, TML-pp-BPF, TML-BPE, TML-BPA, TML-BPAF, TML-BPAP, TMOM-BP, TMOM-BPE, TMOM-BPA, TMOM-BPAF, TMOM-BPAP, HML-TPPHBA, H
- Preferred examples of compounds having at least two epoxy groups include “Epolite” (registered trademark) 40E, “Epolite” 100E, “Epolite” 200E, “Epolite” 400E, “Epolite” 70P, “Epolite” 200P, “Epolite” “400P,” Epolite” 1500NP, “Epolite” 80MF, “Epolite” 4000, “Epolite” 3002 (manufactured by Kyoeisha Chemical Co., Ltd.), “Denacol” (registered trademark) EX-212L, “Denacol” EX-214L , “Denacol” EX-216L, “Denacol” EX-850L (manufactured by Nagase ChemteX Corporation), GAN, GOT (manufactured by Nippon Kayaku Co., Ltd.), “Epicort” (registered trademark) 828, "Epikote” 1002,
- Compounds having at least two oxetanyl groups include, for example, Ethanacol EHO, Ethanacol OXBP, Ethanacol OXTP, Ethanacol OXMA (manufactured by Ube Industries, Ltd.), oxetaneated phenol novolak, and the like.
- the thermal cross-linking agent may be contained in combination of two or more.
- the content is preferably 1 part by mass or more and 30 parts by mass or less in 100 parts by mass of the total amount of the photosensitive resin composition excluding the solvent.
- the content of the thermal cross-linking agent is 1 part by mass or more, the chemical resistance and bending resistance of the cured product can be further enhanced.
- the content of the thermal crosslinking agent is 30 parts by mass or less, the amount of outgassing from the cured product can be further reduced, the long-term reliability of the organic EL display device can be further improved, and the photosensitive resin composition can be stored. Excellent stability.
- the photosensitive resin composition of the present invention may contain a solvent. By containing a solvent, a varnish state can be obtained, and coatability can be improved.
- Solvents include polar aprotic solvents such as ⁇ -butyrolactone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl ether, diethylene glycol mono Ethyl ether, diethylene glycol mono-n-propyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-n-propyl ether , propylene glycol mono-n-butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-n-butyl ether, trip
- the content of the solvent is not particularly limited, but is preferably 100 to 3000 parts by mass, more preferably 150 to 2000 parts by mass, based on 100 parts by mass of the total photosensitive resin composition excluding the solvent.
- the proportion of the solvent having a boiling point of 180° C. or higher in 100 parts by mass of the total solvent is preferably 20 parts by mass or less, more preferably 10 parts by mass or less.
- the photosensitive resin composition of the present invention may contain an adhesion improver.
- Adhesion improvers include vinyltrimethoxysilane, vinyltriethoxysilane, epoxycyclohexylethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane, Silane coupling agents such as 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, titanium chelating agents, aluminum chelating agents, aromatic amine compounds and alkoxy group-containing A compound obtained by reacting a silicon compound can be contained.
- the content of the adhesion improver is preferably 0.01 to 10 parts by weight per 100 parts by weight of the total photosensitive resin composition excluding the solvent.
- the photosensitive resin composition of the present invention may contain an adhesion improver to improve wettability with the substrate.
- surfactants include SH series, SD series, and ST series from Dow Corning Toray Co., Ltd., BYK series from BYK Chemie Japan Co., Ltd., KP series from Shin-Etsu Chemical Co., Ltd., and NOF Corporation.
- Disform series of DIC Corporation "Megafac (registered trademark)” series of DIC Corporation, Florard series of Sumitomo 3M Limited, “Surflon (registered trademark)” series of Asahi Glass Co., Ltd., "Asahi Guard (registered trademark)” series of Asahi Glass Co., Ltd.
- the content of the surfactant when it is contained is preferably 0.001 to 1 part by mass in 100 parts by mass of the total amount of the photosensitive resin composition excluding the solvent.
- the photosensitive resin composition of the present invention may contain inorganic particles.
- Preferred specific examples of inorganic particles can include silicon oxide, titanium oxide, barium titanate, alumina, talc, and the like.
- the primary particle diameter of the inorganic particles is preferably 100 nm or less, more preferably 60 nm or less.
- the content of the inorganic particles is preferably 5 to 90 parts by mass in 100 parts by mass of the total amount of the photosensitive resin composition excluding the solvent.
- the total mass of all chlorine atoms and all bromine atoms contained in the photosensitive resin composition is , is preferably 150 ppm or less, more preferably 100 ppm or less, and even more preferably less than 2 ppm, which is the detection limit of combustion ion chromatography.
- the photosensitive resin composition is cured. It is possible to suppress the deterioration of the electrodes and the light-emitting layer of the organic EL display device having the cured product and improve the long-term reliability.
- the total amount of all chlorine atoms and all bromine atoms contained in the photosensitive resin composition is 150 ppm or less with respect to the solid content excluding the solvent from the photosensitive resin composition, so that the photosensitive resin composition of the present invention It is possible to enhance the storage stability of the resin composition during frozen storage.
- the total mass of all chlorine atoms and all bromine atoms contained in the photosensitive resin composition is determined, for example, by burning the photosensitive resin composition in a combustion tube of an analyzer, absorbing the generated gas into a solution, and adding a part of the absorption liquid. Part can be determined by combustion ion chromatography with ion chromatography.
- the total mass of inorganic ions contained in the photosensitive resin composition is preferably 100 ppm or less with respect to the total mass of solids in the photosensitive resin composition, It is more preferably 50 ppm or less, even more preferably 10 ppm or less, and most preferably less than 5 ppm, which is the detection limit of ion chromatography.
- the storage stability of the photosensitive resin composition of the present invention during frozen storage can be enhanced.
- Inorganic ions represent ions of inorganic compounds that do not contain carbon, and include halogen ions, metal ions, nitrate ions, phosphate ions, sulfate ions, and ammonium ions.
- the total mass of inorganic ions in the photosensitive resin composition can be measured, for example, by suspending the photosensitive resin composition in pure water and analyzing the filtered aqueous solution by ion chromatography.
- the photosensitive resin composition of the present invention can be obtained by dissolving a radically polymerizable compound, a thermal cross-linking agent, a solvent, an adhesion improver, a surfactant, inorganic particles, and the like.
- Dissolution methods include stirring and heating.
- the heating temperature is preferably set within a range that does not impair the performance of the photosensitive resin composition, and is usually room temperature to 80°C.
- the order of dissolving each component is not particularly limited, and for example, a method of dissolving compounds in order of low solubility can be mentioned.
- ingredients that tend to generate air bubbles during stirring and dissolution such as surfactants and some adhesion improvers, by adding them at the end after dissolving other ingredients, the other ingredients will not be dissolved due to air bubbles. can be prevented.
- the obtained photosensitive resin composition is preferably filtered using a filtration filter to remove dust and particles.
- filter pore sizes include, but are not limited to, 0.5 ⁇ m, 0.2 ⁇ m, 0.1 ⁇ m, 0.07 ⁇ m, 0.05 ⁇ m, and 0.02 ⁇ m.
- Materials for the filter include polypropylene (PP), polyethylene (PE), nylon (NY), polytetrafluoroethylene (PTFE), and the like. Among them, polyethylene and nylon are preferred.
- the method for producing a cured product of the present invention includes the steps of forming a resin film made of the photosensitive resin composition of the present invention on a substrate, exposing the resin film, developing the exposed resin film, and developing the resin film.
- a method for producing a cured product including a step of heat-treating a resin film.
- the resin film can be obtained by applying the photosensitive resin composition of the present invention to obtain a coating film of the photosensitive resin composition and drying the film.
- Examples of methods for applying the photosensitive resin composition of the present invention include spin coating, slit coating, dip coating, spray coating, and printing.
- the slit coating method is preferable because it can be applied with a small amount of coating liquid and is advantageous for cost reduction.
- the amount of the coating liquid required for the slit coating method is, for example, about 1/5 to 1/10 of that for the spin coating method.
- Examples of slit nozzles used for coating include "Linear Coater” manufactured by Dainippon Screen Mfg. Co., Ltd., "Spinless” manufactured by Tokyo Ohka Kogyo Co., Ltd., “TS Coater” manufactured by Toray Engineering Co., Ltd., and Chugai Ro Kogyo Co., Ltd.
- the coating speed is generally in the range of 10 mm/sec to 400 mm/sec.
- the film thickness of the coating film varies depending on the solid content concentration and viscosity of the photosensitive resin composition, but it is usually applied so that the film thickness after drying is 0.1 to 10 ⁇ m, preferably 0.3 to 5 ⁇ m. be.
- the base material to be coated with the photosensitive resin composition may be pretreated with the adhesion improver described above.
- a pretreatment method for example, 0.5 to 20% by mass of an adhesion improver is added to a solvent such as isopropanol, ethanol, methanol, water, tetrahydrofuran, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, ethyl lactate, and diethyl adipate.
- a solvent such as isopropanol, ethanol, methanol, water, tetrahydrofuran, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, ethyl lactate, and diethyl adipate.
- a method of treating the base material surface using the dissolved solution can be mentioned. Methods for treating the substrate surface include spin coating, slit die coating, bar coating, dip coating, spray coating, vapor treatment, and the like.
- drying treatment under reduced pressure is performed as necessary.
- the speed of drying under reduced pressure depends on the volume of the vacuum chamber, the capacity of the vacuum pump, the diameter of the pipe between the chamber and the pump, and the like. is preferably set to A general vacuum drying time is often about 30 seconds to 100 seconds, and the ultimate pressure in the vacuum chamber at the end of the vacuum drying is usually 100 Pa or less with the coated substrate present. By setting the ultimate pressure to 100 Pa or less, the surface of the coating film can be kept in a dry state with reduced stickiness, thereby suppressing surface contamination and generation of particles during subsequent substrate transport.
- the heating time is preferably from 1 minute to several hours.
- the heating temperature varies depending on the type and purpose of the coating film, but is preferably 80° C. or higher, more preferably 90° C. or higher, from the viewpoint of accelerating solvent drying during prebaking.
- the temperature is preferably 150° C. or lower, more preferably 140° C. or lower, from the viewpoint of reducing the progress of curing during prebaking.
- the resin film of the present invention can form a pattern.
- a desired pattern can be formed by exposing the resin film to actinic rays through a photomask having a desired pattern, followed by development.
- the photomask used for exposure is preferably a halftone photomask having a light-transmitting portion, a light-shielding portion, and a semi-light-transmitting portion.
- a pattern having a step shape can be formed after development.
- the portion formed from the light shielding portion corresponds to the thick film portion
- the portion formed from the light shielding portion corresponds to the thick film portion.
- the portion formed from the tone exposure portion corresponds to the thin film portion.
- the transmittance of the semi-light-transmitting portion is preferably 5% or more, more preferably 10% or more.
- the transmittance of the semi-transparent portion is within the above range, the step between the thick film portion and the thin film portion can be clearly formed.
- the transmittance of the translucent portion is preferably 30% or less, preferably 25% or less, more preferably 20% or less, and most preferably 15% or less.
- the film thickness of the thin film portion can be formed thick, even when forming a black cured product having a low optical density in visible light per 1 ⁇ m of film thickness. , the optical density of the entire film can be increased.
- Actinic rays used for exposure include ultraviolet rays, visible rays, electron beams, and X-rays.
- the exposed portion dissolves in the developer.
- the exposed areas are cured and rendered insoluble in the developer.
- Developers include tetramethylammonium hydroxide, diethanolamine, diethylaminoethanol, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, triethylamine, diethylamine, methylamine, dimethylamine, dimethylaminoethyl acetate, dimethylaminoethanol, dimethyl
- alkaline compounds such as aminoethyl methacrylate, cyclohexylamine, ethylenediamine and hexamethylenediamine are preferred.
- Polar solvents such as N-methyl-2-pyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylsulfoxide, ⁇ -butyrolactone and dimethylacrylamide, and alcohols such as methanol, ethanol and isopropanol are added to these alkaline aqueous solutions.
- esters such as ethyl lactate and propylene glycol monomethyl ether acetate; and ketones such as cyclopentanone, cyclohexanone, isobutyl ketone and methyl isobutyl ketone.
- developing methods include methods such as spray, paddle, immersion, and ultrasonic waves.
- the pattern formed by development is preferably rinsed with distilled water.
- Alcohols such as ethanol and isopropyl alcohol, and esters such as ethyl lactate and propylene glycol monomethyl ether acetate may be added to distilled water for rinsing.
- the heat treatment temperature is preferably 180° C. or higher, more preferably 200° C. or higher, even more preferably 230° C. or higher, and particularly preferably 250° C. or higher, from the viewpoint of further reducing the amount of outgassing generated from the cured product.
- the temperature is preferably 500° C. or lower, more preferably 450° C. or lower. Within this temperature range, the temperature may be raised stepwise or may be raised continuously.
- the heat treatment time is preferably 30 minutes or longer. Moreover, from the viewpoint of improving the film toughness of the cured product, the time is preferably 3 hours or less. For example, there is a method of performing heat treatment at 150° C. and 250° C. for 30 minutes each, and a method of performing heat treatment while linearly increasing the temperature from room temperature to 300° C. over 2 hours.
- the cured product of the present invention is a cured product obtained by curing the photosensitive resin composition of the present invention.
- the photosensitive resin composition of the present invention contains a polyimide precursor, a polybenzoxazole precursor, a copolymer thereof, or a copolymer of them and a polyimide, imide rings and oxazole rings are converted by heat treatment. Since it is formed, heat resistance and chemical resistance can be further improved.
- the heat treatment temperature is preferably 180°C or higher, more preferably 200°C or higher, even more preferably 230°C or higher, and particularly preferably 250°C or higher, from the viewpoint of further reducing the amount of outgassing generated from the cured product.
- the temperature is preferably 500° C. or lower, more preferably 450° C. or lower. Within this temperature range, the temperature may be raised stepwise or may be raised continuously.
- the heat treatment time is preferably 30 minutes or longer.
- the time is preferably 3 hours or less. For example, there is a method of performing heat treatment at 150° C. and 250° C. for 30 minutes each, and a method of performing heat treatment while linearly increasing the temperature from room temperature to 300° C. over 2 hours.
- the optical density (hereinafter referred to as OD) per 1 ⁇ m of film thickness of the cured product of the present invention is preferably OD value of 0.5 or more, more preferably 0.7 or more.
- the cured product can improve the light-shielding property, so in a display device such as an organic EL display device or a liquid crystal display device, visualization of electrode wiring and external light reflection can be further reduced, Contrast in image display can be improved.
- the OD value is preferably 1.0 or less from the viewpoint of being able to improve the sensitivity at the time of exposure when a photosensitive resin composition containing a photosensitive compound to be described later is formed.
- the OD value is obtained by adding the ionic dye (b1), the ionic dye (b2), the ionic dye (b3), the thermochromic compound, or , compound (f) and compound (g). Moreover, you may use a coloring material (d) together.
- the photosensitive resin composition and cured product of the present invention can be used for surface protective layers and interlayer insulating layers of semiconductor devices, insulating layers for organic electroluminescence (hereinafter referred to as EL) devices, and driving display devices using organic EL devices.
- EL organic electroluminescence
- TFT Thin Film Transistor
- CMOS complementary metal-oxide-semiconductor
- PFRAM Polymer Ferroelectric RAM
- OUM Phase Change RAM
- a display device including a first electrode formed on a substrate and a second electrode provided opposite to the first electrode for example, a display device using an LCD, ECD, ELD, or an organic electroluminescence device (Organic electroluminescence device) It can also be used as an insulating layer.
- An organic EL display device, a semiconductor device, and a semiconductor electronic component will be described below as examples.
- An organic EL display device of the present invention is an organic EL display device having a driving circuit, a planarizing layer, a first electrode, an insulating layer, a light-emitting layer and a second electrode on a substrate, wherein the planarizing layer and/or the insulating layer A layer has the cured product of the present invention.
- the OD value in visible light per 1 ⁇ m of film thickness of the insulating layer is 0.5 to 1.0.
- the cured product can improve the light-shielding property, so in a display device such as an organic EL display device or a liquid crystal display device, visualization of electrode wiring and external light reflection can be further reduced. , the contrast in image display can be improved.
- the OD value is 1.0 or less, the sensitivity at the time of exposure when a photosensitive resin composition containing a photosensitive compound is formed can be improved.
- the thickness of the insulating layer is preferably 1.0 to 5.0 ⁇ m, more preferably 1.5 ⁇ m or more, and still more preferably 2.0 ⁇ m or more.
- a substrate made of glass, various plastics, or the like is provided with TFTs and wirings located on the sides of the TFTs and connected to the TFTs, and unevenness is covered thereon.
- a planarization layer is thus provided, and a display element is provided on the planarization layer.
- the display element and the wiring are connected through a contact hole formed in the planarization layer.
- the substrate having the above-described drive circuit includes a resin film in the organic EL display device.
- a cured product obtained by curing the photosensitive resin composition of the present invention is used as an insulating layer or a flattening layer of such a flexible display device, it is particularly preferably used because of its excellent bending resistance.
- Polyimide is particularly preferable as the resin film from the viewpoint of improving adhesion to the cured product obtained by curing the photosensitive resin composition of the present invention.
- the organic EL display device preferably further includes a color filter having a black matrix in order to enhance the effect of reducing external light reflection.
- the black matrix preferably contains a resin such as epoxy resin, acrylic resin, urethane resin, polyester resin, polyimide resin, polyolefin resin, or siloxane resin.
- the black matrix contains a coloring agent.
- a black organic pigment for example, a black organic pigment, a mixed color organic pigment, an inorganic pigment, or the like can be contained.
- black organic pigments include carbon black, perylene black, aniline black, and benzofuranone pigments.
- Mixed-color organic pigments may contain, for example, pseudo-black pigments obtained by mixing two or more pigments such as red, blue, green, purple, yellow, magenta and/or cyan.
- Black inorganic pigments include, for example, graphite; fine particles of metals such as titanium, copper, iron, manganese, cobalt, chromium, nickel, zinc, calcium, and silver; metal oxides; metal composite oxides; metal sulfides; substances; metal oxynitrides; metal carbides and the like.
- metals such as titanium, copper, iron, manganese, cobalt, chromium, nickel, zinc, calcium, and silver
- metal oxides such as titanium, copper, iron, manganese, cobalt, chromium, nickel, zinc, calcium, and silver
- metal oxides such as titanium composite oxides
- metal sulfides such as sodium shieldide
- substances metal oxynitrides
- metal carbides and the like are preferred.
- the OD value of the black matrix is preferably 1.5 or more, more preferably 2.5 or more, and even more preferably 4.5 or more.
- Fig. 1 shows a cross-sectional view of an example of an organic EL display device.
- Bottom gate type or top gate type TFTs (thin film transistors) 1 are provided in a matrix on a substrate 6 , and a TFT insulating layer 3 is formed to cover the TFTs 1 .
- a wiring 2 connected to the TFT 1 is provided on the TFT insulating layer 3 .
- a flattening layer 4 is provided on the TFT insulating layer 3 so as to bury the wiring 2 therein.
- a contact hole 7 reaching the wiring 2 is provided in the planarization layer 4 .
- An ITO (transparent electrode) 5 is formed on the planarization layer 4 while being connected to the wiring 2 through the contact hole 7 .
- the ITO 5 becomes an electrode of a display element (for example, an organic EL element).
- An insulating layer 8 is formed so as to cover the periphery of the ITO 5 .
- the organic EL element may be of a top emission type in which light is emitted from the side opposite to the substrate 6, or may be of a bottom emission type in which light is extracted from the substrate 6 side. In this manner, an active matrix type organic EL display device is obtained in which the TFTs 1 for driving the organic EL elements are connected to the respective organic EL elements.
- the TFT insulating layer 3, the planarizing layer 4 and/or the insulating layer 8 are formed by the steps of forming a resin film made of the photosensitive resin composition of the present invention, exposing the resin film, and exposing the exposed resin film, as described above. can be formed by a step of developing and a step of heat-treating the developed resin film. An organic EL display device can be obtained by a manufacturing method including these steps.
- a display device other than the organic EL display device of the present invention is a display device having at least metal wiring, the cured product of the present invention, and a plurality of light emitting elements, wherein the light emitting element has a pair of electrode terminals on one surface thereof. wherein the pair of electrode terminals are connected to the plurality of metal wirings extending in the cured product, and the plurality of metal wirings are configured to maintain electrical insulation due to the cured product. .
- a display device 11 has a plurality of light emitting elements 12 arranged on a counter substrate 15 and a cured product 13 arranged on the light emitting elements 12 .
- the term "on the light emitting element” means not only the surface of the light emitting element but also the support substrate and the upper side of the light emitting element.
- the embodiment shown in FIG. 2 exemplifies a configuration in which a plurality of cured products 13 are further laminated on the cured product 13 arranged so as to be in contact with at least a part of the light emitting element 12, and a total of three layers are laminated.
- the cured product 13 may be a single layer.
- the light emitting element 12 has a pair of electrode terminals 16 on the surface opposite to the surface in contact with the counter substrate 15 , and each electrode terminal 16 is connected to a metal wiring 14 extending through the cured product 13 .
- the cured product 13 also functions as an insulating layer. It's becoming A structure in which the metal wiring maintains electrical insulation means that a portion of the metal wiring that requires electrical insulation is covered with a cured product obtained by curing a photosensitive resin composition containing an alkali-soluble resin (a).
- the state in which the insulating layer has electrical insulation means the state in which the volume resistivity of the insulating layer is 10 12 ⁇ cm or more.
- the light emitting element 12 is electrically connected to a driving element 18 attached to a light emitting element driving substrate 17 provided at a position facing the counter substrate 15 through metal wirings 14 and 14c. Light emission can be controlled.
- the light-emitting element driving substrate 17 is electrically connected to the metal wiring 14 via solder bumps 20, for example.
- a barrier metal 19 may be provided in order to prevent diffusion of metal such as the metal wiring 14 .
- the cured product 13 is black and has an OD value of 0.5 to 1.0 in visible light per 1 ⁇ m of thickness of the insulating layer.
- the cured product can improve the light-shielding property, so in a display device such as an organic EL display device or a liquid crystal display device, visualization of electrode wiring and external light reflection can be further reduced. , the contrast in image display can be improved.
- the OD value is 1.0 or less, the sensitivity at the time of exposure when a photosensitive resin composition containing a photosensitive compound is formed can be improved.
- TMAH 2.38 wt% tetramethylammonium aqueous solution
- the resulting pattern was observed with an FPD microscope (MX61 manufactured by Olympus Corporation) at a magnification of 20 times to measure the aperture diameter of the holes.
- the minimum exposure dose at which the contact hole diameter reached 10 ⁇ m was determined and defined as the sensitivity. “S” if the sensitivity was less than 100 mJ/cm 2 , “A” if it was 100 mJ/cm 2 or more and less than 120 mJ/cm 2 , and if it was 120 mJ/cm 2 or more and less than 150 mJ/cm 2 It was judged as "B”, "C” when it was 150 mJ/cm 2 or more, and "D” when a residue was generated in the hole pattern regardless of the sensitivity.
- the absolute value of the difference between the OD value per 1 ⁇ m film thickness after one-time curing and the OD value per 1 ⁇ m film thickness after two-time curing is defined as the amount of change in the OD value due to repeated curing, and the amount of change is less than 0.05. When it was 0.05 or more and less than 0.15, it was judged as "A”, and when it was 0.15 or more, it was judged as "C”.
- the measurement area was about 201 cm 2 inside a circle with a radius of 8 cm from the center of the wafer, and the number of foreign substances (defect density) per 1 cm 2 of the coating film was obtained.
- it was 1.00/cm 2 or more it was judged as "C”.
- FIG. 3 shows a schematic diagram of the manufacturing procedure of an organic EL display device using the photosensitive resin composition obtained in each example and comparative example.
- an ITO transparent conductive film of 10 nm was formed on an alkali-free glass substrate 21 of 38 mm ⁇ 46 mm over the entire surface of the substrate by sputtering, and etched as a first electrode (transparent electrode) 22 .
- an auxiliary electrode 23 for taking out the second electrode was also formed.
- the obtained substrate was ultrasonically cleaned for 10 minutes with a cleaning solution (Semico Clean 56 (trade name) manufactured by Furuuchi Chemical Co., Ltd.) and then cleaned with ultrapure water.
- a cleaning solution Semico Clean 56 (trade name) manufactured by Furuuchi Chemical Co., Ltd.
- the photosensitive resin composition obtained in each example and comparative example was applied to the entire surface of the substrate by spin coating, and prebaked on a hot plate at 120° C. for 2 minutes.
- the film After exposing the film to the minimum exposure amount of each photosensitive resin composition using a high-pressure mercury lamp as a light source through a photomask, the film is developed with a 2.38% by mass TMAH aqueous solution, unnecessary portions are dissolved, and rinsed with pure water. bottom.
- the obtained resin pattern was heat-treated at 230° C. for 60 minutes in an air atmosphere or a nitrogen atmosphere using a high-temperature clean oven (INH-9CD-S manufactured by Koyo Thermo Systems Co., Ltd.).
- the insulating layer 24 having a width of 70 ⁇ m and a length of 260 ⁇ m is arranged at a pitch of 155 ⁇ m in the width direction and a pitch of 465 ⁇ m in the length direction, and each opening exposes the first electrode. Formed only in the effective area.
- an insulating layer having an insulating layer aperture ratio of 25% was formed in a square substrate effective area of 16 mm on a side. The thickness of the insulating layer was about 1.5 ⁇ m in both Examples and Comparative Examples.
- an organic EL layer 25 including a light-emitting layer was formed by a vacuum deposition method.
- the degree of vacuum during vapor deposition was 1 ⁇ 10 ⁇ 3 Pa or less, and the substrate was rotated with respect to the vapor deposition source during vapor deposition.
- 10 nm of compound (HT-1) was deposited as a hole injection layer, and 50 nm of compound (HT-2) was deposited as a hole transport layer.
- a compound (GH-1) as a host material and a compound (GD-1) as a dopant material were deposited on the light-emitting layer to a thickness of 40 nm with a doping concentration of 10%.
- the compound (ET-1) and the compound (LiQ) as electron transport materials were laminated at a volume ratio of 1:1 to a thickness of 40 nm. Structures of compounds used in the organic EL layer are shown below.
- a compound (LiQ) LiQ
- Mg and Ag were vapor-deposited to a thickness of 10 nm at a volume ratio of 10:1 to form a second electrode (non-transparent electrode) 26 .
- a cap-shaped glass plate was sealed by bonding with an epoxy resin adhesive, and a top-emission type organic compound having a square shape with a side of 5 mm was placed on a single substrate.
- Four EL display devices were produced. Incidentally, the film thickness referred to here is a value displayed on a crystal oscillation type film thickness monitor.
- organic EL display devices were prepared for each of the examples and comparative examples, placed on a hot plate heated to 80° C. with the light emitting surface facing up, and irradiated with UV light having a wavelength of 365 nm and an illuminance of 0.6 kmW/cm 2 . irradiated with light.
- a display test was performed on the organic EL display devices after 500 hours and 1000 hours. After each period of time, ⁇ A'' indicates 0 unlit devices, ⁇ B'' indicates 1 to 4 unlit devices, and ⁇ B'' indicates 5 or more unlit devices. C” was determined.
- Mass of total chlorine and total bromine atoms with respect to the total mass of solid content of each raw material and photosensitive resin composition The mass (ppm) of all chlorine atoms and all bromine atoms with respect to the total mass of the solid content of each raw material or photosensitive resin composition was quantified by photography.
- Combustion/absorption condition system AQF-2100H, GA-211 (manufactured by Mitsubishi Chemical) Electric furnace temperature: Inlet 900°C Outlet 1000°C Gas: Ar/ O2 200 mL/min O2 400 mL/min Absorption liquid: H 2 O 2 0.1% internal standard P 2 ⁇ g/mL Absorbing liquid volume: 5mL Ion chromatography/anion analysis condition system: ICS-1600 (DIONEX) Mobile phase: 2.7 mmol/L Na2CO3 /0.3 mmol/L NaHCO3 Flow rate: 1.50 mL/min Detector: Conductivity detector Injection volume: 100 ⁇ L.
- xanthene compound ( ⁇ -4) in which xanthene compound ( ⁇ -3) was amidated.
- the maximum absorption wavelength of each ionic dye was calculated by measuring the transmission spectrum at wavelengths from 300 nm to 800 nm in a GBL solution using an ultraviolet-visible spectrophotometer (MultiSpec-1500 manufactured by Shimadzu Corporation).
- d1-3-1 Solvent Blue 45 (nonionic dye having a maximum absorption wavelength in any range of 580 nm or more and 800 nm or less)
- e-1 4,4',4''-methylidine trisphenol (thermochromogenic compound)
- f12-1 1,2.4-trihydroxybenzene (a compound that satisfies the condition that at least one substitution position of a phenolic hydroxyl group other than one of the phenolic hydroxyl groups is the ortho-position and the para-position ( f))
- g-1 2,4,6-tris[bis(methoxymethyl)amino]-1,3,5-triazine
- GBL ⁇ -butyrolactone
- EL ethyl lactate
- PGME
- Example 1 Polyimide precursor (a-1) 10.0 g, ionic dye (b1-1) 1.1 g, ionic dye (b2-1) 2.4 g, quinonediazide compound (c-1) 2.0 g, (e- 1) 2.0 g of the solution was dissolved in 10 g of GBL, 20 g of EL and 70 g of PGME, and filtered through a 0.2 ⁇ m polytetrafluoroethylene filter to obtain a positive photosensitive resin composition AA. Using the obtained photosensitive resin composition, the sensitivity and residue, OD value per 1 ⁇ m film thickness, frozen storage stability, long-term reliability of the organic EL display device, solid content of the photosensitive resin composition were measured as described above. The mass of all chlorine and all bromine atoms was evaluated with respect to the total mass. However, for the evaluation of the OD value and the long-term reliability evaluation of the organic EL display device, a cured film cured in an air atmosphere was used.
- Examples 2 to 5 and 7, Comparative Examples 1 to 3 A positive photosensitive resin composition was prepared in the same manner as in Example 1 except that the alkali-soluble resin (a), the ionic dye (b), other additives, and the type or amount of the solvent were changed as shown in Table 2. got stuff Using the obtained photosensitive resin composition, sensitivity and residue, OD value per 1 ⁇ m film thickness, frozen storage stability, long-term reliability of organic EL display device, total solid content of photosensitive resin composition relative to total mass The mass of chlorine and all bromine atoms was evaluated. However, for the evaluation of the OD value and the long-term reliability evaluation of the organic EL display device, a cured film cured in an air atmosphere was used.
- Example 6 Using the photosensitive resin composition AE obtained in Example 5, sensitivity and residue, OD value per 1 ⁇ m film thickness, frozen storage stability, long-term reliability of organic EL display device, photosensitive resin composition The mass of all chlorine atoms and all bromine atoms was evaluated with respect to the total mass of the solid content of the material. However, a cured film cured in a nitrogen atmosphere was used for the evaluation of the OD value and the long-term reliability evaluation of the organic EL display device.
- Example 8 and 9 Using the photosensitive resin composition AC obtained in Example 3 and the photosensitive resin composition AF obtained in Example 7, the OD value per 1 ⁇ m film thickness and the change in the OD value due to repeated curing were measured as described above. quantity was evaluated. However, a cured film cured in an air atmosphere was used for both the first and second times.
- Tables 2 to 4 show the composition and evaluation results of each example and comparative example.
- TFT thin film transistor
- Wiring 3 TFT insulating layer 4: Flattening layer 5: ITO (transparent electrode) 6: Substrate 7: Contact hole 8: Insulating layer 11: Display device 12: Light emitting element 13: Cured material 14, 14c: Metal wiring 15: Counter substrate 16: Electrode terminal 17: Light emitting element driving substrate 18: Driving element 19: Barrier Metal 20: Solder bump 21: Non-alkali glass substrate 22: First electrode (transparent electrode) 23: auxiliary electrode 24: insulating layer 25: organic EL layer 26: second electrode (non-transparent electrode)
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Abstract
Description
<アルカリ可溶性樹脂(a)>
本発明の感光性樹脂組成物は、アルカリ可溶性樹脂(a)を含む。アルカリ可溶性とは、樹脂をγ-ブチロラクトンに溶解した溶液をシリコンウエハ上に塗布し、120℃で4分間プリベークを行って膜厚10μm±0.5μmのプリベーク膜を形成し、該プリベーク膜を23±1℃の2.38質量%テトラメチルアンモニウムヒドロキシド水溶液に1分間浸漬した後、純水でリンス処理したときの膜厚減少から求められる溶解速度が50nm/分以上であることをいう。
これらのアルカリ可溶性樹脂(a)の中でも、現像密着性が高いこと、耐熱性に優れ、高温下におけるアウトガス量が少ないことによって、硬化物を有機EL表示装置に用いた時の長期信頼性が高いことから、ポリイミド、ポリイミド前駆体、ポリベンゾオキサゾール、ポリベンゾオキサゾール前駆体、ポリアミドイミド、ポリアミドイミド前駆体およびそれらの共重合体からなる群より選択される1種以上を含むことが好ましく、ポリイミド、ポリイミド前駆体、ポリベンゾオキサゾール前駆体またはそれらの共重合体がより好ましい。さらに、感度をより向上させる観点から、ポリイミド前駆体またはポリベンゾオキサゾール前駆体がさらに好ましい。ここで、ポリイミド前駆体とは、加熱処理や化学処理によりポリイミドに変換される樹脂を指し、例えば、ポリアミド酸、ポリアミド酸エステルなどを含有することができる。ポリベンゾオキサゾール前駆体とは、加熱処理や化学処理によりポリベンゾオキサゾールに変換される樹脂を指し、例えば、ポリヒドロキシアミドなどを含有することができる。
上記式(2)中、X(R11)t(COOR12)uは酸の残基を表す。Xは炭素数4~40かつ2~8価の有機基であり、なかでも芳香族環または環状脂肪族基を含有する2~8価の有機基が好ましい。
また、これらの樹脂の末端を、公知の酸性基を有するモノアミン、酸無水物、酸クロリド、モノカルボン酸、活性エステル化合物により封止してもよい。
ポリイミド前駆体であるポリアミド酸の製造方法としては、例えば、低温中でテトラカルボン酸二無水物とジアミン化合物を溶剤中で反応させる方法が挙げられる。
同じくポリイミド前駆体であるポリアミド酸エステルの製造方法としては、前述のポリアミド酸をエステル化剤と反応させる方法の他に、テトラカルボン酸二無水物とアルコールとによりジエステルを得て、その後、縮合剤の存在下でアミンと溶剤中で反応させる方法、テトラカルボン酸二無水物とアルコールとによりジエステルを得て、その後、残りのジカルボン酸を酸クロリド化し、アミンと溶剤中で反応させる方法などが挙げられる。合成の容易さの観点から、ポリアミド酸とエステル化剤を反応させる工程を含むことが好ましい。エステル化剤としては、特に限定は無く、公知の方法を適用することができるが、得られた樹脂の精製が容易であることから、N、N―ジメチルホルムアミドジアルキルアセタールが好ましい。
ポリイミドの製造方法としては、例えば、前述の方法で得られたポリアミド酸またはポリアミド酸エステルを溶剤中で脱水閉環する方法などが挙げられる。脱水閉環の方法としては、酸や塩基などによる化学処理、加熱処理などが挙げられる。
ポリアミドイミド前駆体としては、トリカルボン酸、対応するトリカルボン酸無水物、トリカルボン酸無水物ハライドとジアミン化合物との重合体が挙げられ、無水トリメリット酸クロライドと芳香族ジアミン化合物との重合体が好ましい。ポリアミドイミド前駆体の製造方法としては、例えば、低温中でトリカルボン酸、対応するトリカルボン酸無水物、トリカルボン酸無水物ハライドなどとジアミン化合物を溶剤中で反応させる方法などが挙げられる。
本発明の感光性樹脂組成物は、さらに分子間にて有機イオン同士のイオン対を形成するイオン性染料(b)(以下、イオン性染料(b)と呼ぶ場合がある。)をn種含有し、該感光性樹脂組成物中に含まれる有機イオンが(n+1)種である。ただしnは2~10の整数を表し、有機イオンは炭素を含む有機化合物のイオンを表す。感光性樹脂組成物が有機アニオン部同士および有機カチオン部同士が異なるイオン性染料(b)をn種含む場合、感光性樹脂組成物中に含まれる有機イオンは(n×2)種となる。この場合、感光性樹脂組成物中に有機アニオン、有機カチオンが複数種存在することで、イオン性染料同士のイオン交換により冷凍保管中に異物が増加し、保存安定性が悪化する問題が発生する。一方、本発明の感光性樹脂組成物はイオン性染料(b)をn種含み、感光性樹脂組成物中に含まれる有機イオンが(n+1)種であることにより、感度を維持して残渣を抑えつつ、冷凍保管時の保存安定性が向上する。これはイオン染料(b)に対する有機イオン種が限定されたことにより、感光性樹脂組成物中においてイオン性染料同士のイオン交換が抑制されたからと推定される。
中でも、塩基性染料は、硬化膜の黒色度を高くできる点で、キサンテン系塩基性染料、トリアリールメタン系塩基性染料を含有することが好ましく、耐熱性の高さの点で、キサンテン系酸性染料を含有することが好ましい。
本発明の感光性樹脂組成物は、さらに感光性化合物(c)を含有する。
感光性化合物(c)の含有量は、高感度化の観点から、アルカリ可溶性樹脂(a)100質量部に対して0.1質量部以上が好ましく、より好ましくは1質量部以上であり、10質量部以上がさらに好ましい。一方、本発明の硬化物を有機EL表示装置の平坦化層および/または絶縁層としたときの長期信頼性の観点から、100質量部以下が好ましい。感光性化合物(c)としては、光酸発生剤(c1)や、光重合開始剤(c2)などを含有することができる。光酸発生剤(c1)は、光照射により酸を発生する化合物であり、光重合開始剤(c2)は、露光により結合開裂および/または反応し、ラジカルを発生する化合物である。
本発明の感光性樹脂組成物は、イオン性染料(b)以外の着色剤(d)を含有してもよい。イオン性染料(b)に加えて、着色剤(d)を含有させることで、感光性樹脂組成物の膜を透過する光、または感光性樹脂組成物の膜から反射する光から、着色剤(d)が吸収する波長の光を遮光する、遮光性を付与することができる。遮光性を付与することで、後述する本発明の硬化物を有機EL表示装置の平坦化層および/または絶縁層としたときにTFTへの光の侵入による劣化や誤作動、リーク電流などを防ぐことができる。さらに、配線やTFTからの外光反射の抑制や、発光エリアと非発光エリアのコントラストを向上させることができる。
溶剤溶解性の観点から本発明における着色剤(d)としては、非イオン性染料(d1)が好ましい。一方、後述する本発明の感光性樹脂組成物の加熱処理工程における着色剤の退色を抑制できる観点からは、顔料(d2)が好ましい。
本発明の感光性樹脂組成物は、さらに、1つの芳香環内に少なくとも1つの芳香族C-H結合および少なくとも3つのフェノール性水酸基を有する芳香族炭化水素(f)(以下、化合物(f)と呼ぶ場合がある。)を含むことが好ましい。本発明の感光性樹脂組成物が化合物(f)および後述する式(1)で表されるトリアジン環含有化合物(g)(以下、化合物(g)と呼ぶ場合がある。)を含有することにより、硬化時の雰囲気に依らず加熱により発色し、硬化後に300nm~500nmの波長領域における透過率を下げることができる。かかる発色のメカニズムは定かではないが、加熱によって化合物(f)に含まれる化合物(g)とで架橋反応が進行し、その架橋体がキノン構造をとることにより、300nm~500nmの波長領域に吸収を有する発色体が生成すると考えられる。架橋反応は硬化時の加熱雰囲気に依存しないため、硬化条件の制約を受けることなく、硬化後に300nm~500nmの波長領域における透過率を下げることができる。また加熱前の状態では、化合物(f)および化合物(g)はいずれも300nm~500nmの波長領域に吸収を持たないため、硬化前は露光光源として一般的に用いられる水銀灯の波長領域350nm~450nmの光を遮ることが無く、高い感度でパターン形成することができる。さらにイオン性染料(b1)およびイオン性染料(b2)を含有することにより、硬化後の可視光遮光性が高い膜を得ることができる。
{(2k+6)―(l+m)}≧1 (式)。
本発明の感光性樹脂組成物は、さらに式(1)で表されるトリアジン環含有化合物(g)(化合物(g)とも呼ぶ。)を含むことが好ましい。
本発明の感光性樹脂組成物は熱発色性化合物を含有してもよい。熱発色性化合物は加熱処理により発色し、350nm以上、700nm以下に最大吸収を有する熱発色性化合物であり、より好ましくは加熱処理により発色し、350nm以上、500nm以下に最大吸収を有する熱発色性化合物である。本発明の感光性樹脂組成物がイオン性染料(b1)およびイオン性染料(b2)に加えて熱発色性化合物を含有することによっても、その硬化物の可視光透過率を下げ、黒色とすることが可能である。
本発明の感光性樹脂組成物は、ラジカル重合性化合物を含有してもよい。特に、上記感光性樹脂組成物が光重合開始剤(c2)を含有する場合は、ラジカル重合性化合物を含有することが必須である。ラジカル重合性化合物とは、分子中に複数のエチレン性不飽和二重結合を有する化合物をいう。露光時、前述の光重合開始剤(c2)から発生するラジカルによって、ラジカル重合性化合物のラジカル重合が進行し、光照射部が不溶化することにより、ネガ型のパターンを得ることができる。さらにラジカル重合性化合物を含有することにより、光照射部の光硬化が促進されて、感度をより向上させることができる。加えて、熱硬化後の架橋密度が向上することから、硬化物の硬度を向上させることができる。
本発明の感光性樹脂組成物は、熱架橋剤を含有してもよい。熱架橋剤とは、アルコキシメチル基、メチロール基、エポキシ基、オキセタニル基などの熱反応性の官能基を分子内に少なくとも2つ有する化合物を指す。熱架橋剤を含有することにより、熱架橋剤とアルカリ可溶性樹脂(a)との間、または熱架橋剤同士で架橋し、熱硬化後の硬化物の耐熱性、耐薬品性および折り曲げ耐性を向上させることができる。
熱架橋剤は2種類以上を組み合わせて含有してもよい。
本発明の感光性樹脂組成物は、溶剤を含有してもよい。溶剤を含有することにより、ワニスの状態にすることができ、塗布性を向上させることができる。
本発明の感光性樹脂組成物は、密着改良剤を含有してもよい。密着改良剤としては、ビニルトリメトキシシラン、ビニルトリエトキシシラン、エポキシシクロヘキシルエチルトリメトキシシラン、3-グリシドキシプロピルトリメトキシシラン、3-グリシドキシプロピルトリエトキシシラン、p-スチリルトリメトキシシラン、3-アミノプロピルトリメトキシシラン、3-アミノプロピルトリエトキシシラン、N-フェニル-3-アミノプロピルトリメトキシシランなどのシランカップリング剤、チタンキレート剤、アルミキレート剤、芳香族アミン化合物とアルコキシ基含有ケイ素化合物を反応させて得られる化合物などを含有することができる。これらを2種以上含有してもよい。これらの密着改良剤を含有することにより、樹脂膜を現像する場合などに、シリコンウエハ、酸化インジウムスズ(ITO)、SiO2、窒化ケイ素などの下地基材との現像密着性を高めることができる。また、洗浄などに用いられる酸素プラズマ、UVオゾン処理に対する耐性を高めることができる。密着改良剤の含有量は、溶剤を除く感光性樹脂組成物全量100質量部中に、0.01~10質量部が好ましい。
本発明の感光性樹脂組成物は、密着改良剤を含有してもよく、基板との濡れ性を向上させることができる。界面活性剤としては、例えば、東レ・ダウコーニング(株)のSHシリーズ、SDシリーズ、STシリーズ、ビックケミー・ジャパン(株)のBYKシリーズ、信越化学工業(株)のKPシリーズ、日油(株)のディスフォームシリーズ、DIC(株)の“メガファック(登録商標)”シリーズ、住友スリーエム(株)のフロラードシリーズ、旭硝子(株)の“サーフロン(登録商標)”シリーズ、“アサヒガード(登録商標)”シリーズ、オムノヴァ・ソルーション社のポリフォックスシリーズなどのフッ素系界面活性剤、共栄社化学(株)のポリフローシリーズ、楠本化成(株)の“ディスパロン(登録商標)”シリーズなどのアクリル系および/またはメタクリル系の界面活性剤などを含有することができる。
本発明の感光性樹脂組成物は、無機粒子を含有してもよい。無機粒子の好ましい具体例としては、例えば、酸化珪素、酸化チタン、チタン酸バリウム、アルミナ、タルクなどを含有することができる。無機粒子の一次粒子径は100nm以下が好ましく、60nm以下がより好ましい。
本発明の感光性樹脂組成物は、感光性樹脂組成物中に含まれる全塩素原子と全臭素原子の総質量が、感光性樹脂組成物中から溶剤を除いた固形分の総質量に対して、150ppm以下であることが好ましく、100ppm以下であることがより好ましく、燃焼イオンクロマトグラフィーの検出下限である2ppm未満であることがさらに好ましい。
本発明の感光性樹脂組成物は、感光性樹脂組成物中に含まれる無機イオンの総質量が、感光性樹脂組成物中の固形分の総質量に対して、100ppm以下であることが好ましく、50ppm以下であることがより好ましく、10ppm以下であることがさらに好ましく、イオンクロマトグラフィーの検出下限である5ppm未満であることが最も好ましい。
次に、本発明の感光性樹脂組成物を製造する方法について説明する。例えば、アルカリ可溶性樹脂(a)分子間にて有機イオン同士のイオン対を形成するイオン性染料(b)、感光性化合物(c)と、必要により、着色剤(d)、熱発色性化合物、ラジカル重合性化合物、熱架橋剤、溶剤、密着改良剤、界面活性剤、無機粒子などを溶解させることにより、本発明の感光性樹脂組成物を得ることができる。
本発明の硬化物の製造方法は、基板上に、本発明の感光性樹脂組成物からなる樹脂膜を形成する工程、該樹脂膜を露光する工程、露光した樹脂膜を現像する工程および現像した樹脂膜を加熱処理する工程を含む硬化物の製造方法である。
減圧乾燥速度は、真空チャンバー容積、真空ポンプ能力やチャンバーとポンプ間の配管径等にもよるが、例えば、塗布基板のない状態で、真空チャンバー内が60秒経過後40Paまで減圧される条件等に設定することが好ましい。一般的な減圧乾燥時間は、30秒から100秒程度であることが多く、減圧乾燥終了時の真空チャンバー内到達圧力は、塗布基板のある状態で通常100Pa以下である。到達圧を100Pa以下にすることにより塗布膜表面のべた付きを低減した乾燥状態にすることができ、これにより、続く基板搬送における表面汚染やパーティクルの発生を抑制することができる。
本発明の樹脂膜は、パターンを形成することができる。例えば、樹脂膜に、所望のパターンを有するフォトマスクを通して化学線を照射することにより露光し、現像することにより、所望のパターンを形成することができる。
露光後、ポジ型の場合は露光部を、ネガ型の場合は非露光部を、現像液により除去することによって所望のパターンを形成する。現像液としては、テトラメチルアンモニウムヒドロキシド、ジエタノールアミン、ジエチルアミノエタノール、水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、炭酸カリウム、トリエチルアミン、ジエチルアミン、メチルアミン、ジメチルアミン、酢酸ジメチルアミノエチル、ジメチルアミノエタノール、ジメチルアミノエチルメタクリレート、シクロヘキシルアミン、エチレンジアミン、ヘキサメチレンジアミンなどのアルカリ性を示す化合物の水溶液が好ましい。これらのアルカリ水溶液に、N-メチル-2-ピロリドン、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、ジメチルスルホキシド、γ-ブチロラクトン、ジメチルアクリルアミドなどの極性溶媒、メタノール、エタノール、イソプロパノールなどのアルコール類、乳酸エチル、プロピレングリコールモノメチルエーテルアセテートなどのエステル類、シクロペンタノン、シクロヘキサノン、イソブチルケトン、メチルイソブチルケトンなどのケトン類などを1種以上添加してもよい。現像方式としては、スプレー、パドル、浸漬、超音波等の方式が挙げられる。
現像後、現像した樹脂膜を加熱処理することによって、硬化物を得る。
加熱処理温度は、硬化物から発生するアウトガス量をより低減させる観点から、180℃以上が好ましく、200℃以上がより好ましく、230℃以上がさらに好ましく、250℃以上が特に好ましい。一方、硬化物の膜靭性を向上させる観点から、500℃以下が好ましく、450℃以下がより好ましい。この温度範囲において、段階的に昇温してもよいし、連続的に昇温してもよい。加熱処理時間は、アウトガス量をより低減させる観点から、30分間以上が好ましい。また、硬化物の膜靭性を向上させる観点から3時間以下が好ましい。例えば、150℃、250℃で各30分間ずつ加熱処理する方法や、室温から300℃まで2時間かけて直線的に昇温しながら加熱処理する方法などが挙げられる。
本発明の硬化物は、本発明の感光性樹脂組成物を硬化した硬化物である。本発明の感光性樹脂組成物を加熱処理することにより、耐熱性の低い成分を除去できるため、耐熱性および耐薬品性をより向上させることができる。特に、本発明の感光性樹脂組成物が、ポリイミド前駆体、ポリベンゾオキサゾール前駆体、それらの共重合体またはそれらとポリイミドとの共重合体を含む場合は、加熱処理によりイミド環、オキサゾール環を形成するため、耐熱性および耐薬品性をより向上させることができる。
本発明の感光性樹脂組成物および硬化物は、半導体素子の表面保護層や層間絶縁層、有機エレクトロルミネッセンス(Electroluminescence:以下ELと記す)素子の絶縁層、有機EL素子を用いた表示装置の駆動用薄膜トランジスタ(Thin Film Transistor:以下TFTと記す)基板の平坦化層、回路基板の配線保護絶縁層、固体撮像素子のオンチップマイクロレンズや各種表示装置・固体撮像素子用平坦化層に好適に用いられる。例えば、耐熱性の低いMRAM、次世代メモリとして有望なポリマーメモリ(Polymer Ferroelectric RAM:PFRAM)や相変化メモリ(Phase Change RAM:PCRAM、Ovonics Unified Memory:OUM)などの表面保護層や層間絶縁層として好適である。また、基板上に形成された第一電極と、前記第一電極に対向して設けられた第二電極とを含む表示装置、例えば、LCD、ECD、ELD、有機電界発光素子を用いた表示装置(有機電界発光装置)などの絶縁層にも用いることができる。以下、有機EL表示装置および半導体装置、半導体電子部品を例に説明する。
本発明の有機EL表示装置は、基板上に、駆動回路、平坦化層、第一電極、絶縁層、発光層および第二電極を有する有機EL表示装置であって、平坦化層および/または絶縁層が本発明の硬化物を有する。
本発明の有機EL表示装置以外の表示装置は、少なくとも金属配線、本発明の硬化物、および複数の発光素子を有する表示装置であって、前記発光素子はいずれか一方の面に一対の電極端子を具備し、前記一対の電極端子は前記硬化物中に延在する複数本の前記金属配線と接続し、複数本の前記金属配線は、前記硬化物により電気的絶縁性を保持する構成である。
図2において、表示装置11は、対向基板15上に複数の発光素子12を配し、発光素子12上に硬化物13を配する。発光素子上とは、発光素子の表面のみならず、支持基板や発光素子の上側にあればよい。図2に示す態様では、発光素子12の少なくとも一部と接するように配した硬化物13の上にさらに複数の硬化物13を積層し合計して3層積層する構成を例示しているが、硬化物13は単層であってもよい。発光素子12は対向基板15と接する面とは反対の面に一対の電極端子16を具備し、それぞれの電極端子16が硬化物13中に延在する金属配線14と接続されている。なお、硬化物13中に延在する複数本の金属配線14は、硬化物13により覆われていれば、硬化物13は、絶縁層としても機能するため、電気的絶縁性を保持する構成となっている。金属配線が電気的絶縁性を保持する構成となっているとは、アルカリ可溶性樹脂(a)を含む感光性樹脂組成物を硬化した硬化物によって金属配線の電気的絶縁性が必要な部分が覆われること意味する。また、本発明において絶縁層が、電気的絶縁性がある状態とは、絶縁層の体積抵抗率が1012Ω・cm以上である状態を意味する。さらに発光素子12が、対向基板15に対して対向した位置に設けられた発光素子駆動基板17に付加された駆動素子18と、金属配線14や14cを通じて電気的に接続されて、発光素子12の発光を制御させることができる。また、発光素子駆動基板17は、例えばはんだバンプ20を介して金属配線14と電気的に接続されている。さらに金属配線14などの金属の拡散を防止するため、バリアメタル19を配してもよい。
(1)感度と残渣
各実施例および比較例により得られた感光性樹脂組成物を、塗布現像装置(東京エレクトロン(株)製ACT-8)を用いて、8インチシリコンウェハー上にスピンコート法により塗布し、120℃で2分間ベークをして膜厚4.0μmのプリベーク膜を作製した。なお、膜厚は、大日本スクリーン製造(株)製ラムダエースSTM-602を用いて、屈折率1.63の条件で測定した。その後、露光機i線ステッパーNSR-2005i9C(ニコン社製)を用いて、10μmのホールのパターンを有するマスクを介して、露光量50~300mJ/cm2の範囲で5mJ/cm2毎に露光した。露光後、前記ACT-8の現像装置を用いて、2.38質量%のテトラメチルアンモニウム水溶液(以下TMAH、多摩化学工業(株)製)を現像液として、膜減り量が0.5μmになるまで現像した後、蒸留水でリンスを行い、振り切り乾燥し、パターンを得た。
5cm×5cmのガラス基板上に各実施例および比較例により得られた感光性樹脂組成物を加熱処理(キュア)後の膜厚が2.0μmとなるようにスピンコートで塗布し、120℃で120秒間プリベークし、プリベーク膜を作製した。その後、高温クリーンオーブン(光洋サーモシステム(株)製INH-9CD-S)を用いて、大気雰囲気下または窒素雰囲気下で230℃、60分間キュアし、硬化膜を作製した。なお、硬化膜の膜厚は、触針式プロファイラーを用いて測定した。このようにして得られた硬化膜について、光学濃度計(361T;X-Rite社製)を用いて、OD値を測定した。得られたOD値を硬化膜の膜厚で割り返すことで、膜厚1μm当たりのOD値とした(膜厚1μm当たりのOD値=OD値/硬化膜の膜厚)。膜厚1μm当たりのOD値が0.70以上であった場合は「A」、0.70未満0.50以上であった場合は「B」、0.50未満であった場合は「C」と判定した。
上記(2)で得られた硬化膜を、高温クリーンオーブン(光洋サーモシステム(株)製INH-9CD-S)を再度用いて、大気雰囲気下、230℃で60分間キュアし、2回キュアを行った硬化膜を作製した。上記(2)と同様にして硬化膜の膜厚およびOD値を測定し、得られたOD値を硬化膜の膜厚で割り返すことで、2回キュア後の膜厚1μm当たりのOD値を算出した。1回キュア後の膜厚1μm当たりのOD値と2回キュア後の膜厚1μm当たりのOD値との差の絶対値を繰り返しキュアによるOD値の変化量とし、当該変化量が0.05未満であった場合は「A」、0.05以上0.15未満であった場合は「B」、0.15以上であった場合は「C」と判定した。
塗布・現像装置(東京エレクトロン(株)製“CLEAN TRACK ACT-12”)を用いて、ろ過後に-18℃の冷凍庫で60日間静置保存した各感光性樹脂組成物を12インチSiウエハ上に塗布し、100℃で3分間、ホットプレートで乾燥させ、膜厚1000nmの感光性樹脂膜を得た。得られた感光性樹脂膜について、ウエハ表面検査装置((株)トプコン製“WM-10”)にて0.27μm以上の大きさの異物数を計測した。計測面積はウエハの中心から半径8cmの円の内側の約201cm2とし、塗膜1cm2あたりの異物数(欠陥密度)を求めた。基板1枚あたりの欠陥密度が0.30個/cm2未満であった場合は「A」、0.30個/cm2以上1.00個/cm2未満であった場合は「B」、1.00個/cm2以上であった場合は「C」と判定した。
各実施例および比較例で得られた感光性樹脂組成物を用いた有機EL表示装置の作製手順の概略図を図3に示す。まず、38mm×46mmの無アルカリガラス基板21に、ITO透明導電膜10nmをスパッタ法により基板全面に形成し、第一電極(透明電極)22としてエッチングした。また同時に、第二電極を取り出すための補助電極23も形成した。得られた基板を洗浄液(フルウチ化学(株)製セミコクリーン56(商品名))で10分間超音波洗浄してから、超純水で洗浄した。次にこの基板全面に、各実施例および比較例で得られた感光性樹脂組成物をスピンコート法により塗布し、120℃のホットプレート上で2分間プリベークした。この膜にフォトマスクを介して高圧水銀灯を光源として各感光性樹脂組成物の最小露光量で露光した後、2.38質量%TMAH水溶液で現像し、不要な部分を溶解させ、純水でリンスした。得られた樹脂パターンを、高温クリーンオーブン(光洋サーモシステム(株)製INH-9CD-S)を用いて、大気雰囲気下または窒素雰囲気下で230℃、60分間加熱処理した。このようにして、幅70μm、長さ260μmの開口部が幅方向にピッチ155μm、長さ方向にピッチ465μmで配置され、それぞれの開口部が第一電極を露出せしめる形状の絶縁層24を、基板有効エリアに限定して形成した。このようにして、1辺が16mmの四角形である基板有効エリアに絶縁層開口率25%の絶縁層を形成した。絶縁層の厚さはいずれの実施例・比較例も約1.5μmであった。
各イオン性染料および各実施例、比較例に記載の感光性樹脂組成物について、燃焼イオンクロマトグラフィーにより、各原料または感光性樹脂組成物の固形分の総質量に対する全塩素、全臭素原子の質量(ppm)を定量した。
燃焼・吸収条件
システム:AQF-2100H、GA-211(三菱化学製)
電気炉温度:Inlet900℃ Outlet1000℃
ガス:Ar/O2 200mL/min
O2 400mL/min
吸収液:H2O20.1% 内標P 2μg/mL
吸収液量:5mL
イオンクロマトグラフィー・アニオン分析条件
システム:ICS-1600(DIONEX)
移動相:2.7mmol/L Na2CO3 / 0.3mmol/L NaHCO3
流速:1.50mL/min
検出器:電気伝導度検出器
注入量:100μL。
2,2-ビス(3-アミノ-4-ヒドロキシフェニル)ヘキサフルオロプロパン(以降BAHFと呼ぶ)18.3g(0.05モル)をアセトン100mL、プロピレンオキシド17.4g(0.3モル)に溶解させ、-15℃に冷却した。ここに3-ニトロベンゾイルクロリド20.4g(0.11モル)をアセトン100mLに溶解させた溶液を滴下した。滴下終了後、-15℃で4時間反応させ、その後室温に戻した。析出した白色固体をろ別し、50℃で真空乾燥した。
乾燥窒素気流下、α,α-ビス(4-ヒドロキシフェニル)-4-(4-ヒドロキシ-α,α-ジメチルベンジル)-エチルベンゼン(本州化学工業(株)製TrisP-PA(商品名))21.22g(0.05モル)と5-ナフトキノンジアジドスルホニル酸クロリド26.87g(0.10モル)を1,4-ジオキサン450gに室温で溶解させた。ここに、1,4-ジオキサン50gと混合したトリエチルアミン15.18gを、系内が35℃以上にならないように滴下した。滴下後30℃で2時間撹拌した。トリエチルアミン塩を濾過し、ろ液を水に投入した。その後、析出した沈殿をろ過で集めた。この沈殿を真空乾燥機で乾燥させ、下記式で表されるキノンジアジド化合物(c-1)を得た。
乾燥窒素気流下、3,3’,4,4’-ジフェニルエーテルテトラカルボン酸二無水物(以降ODPAと呼ぶ)31.0g(0.10モル)をN-メチルピロリドン(以降NMPと呼ぶ)500gに溶解させた。ここに合成例1で得られたヒドロキシル基含有ジアミン化合物(α)45.35g(0.075モル)と1,3-ビス(3-アミノプロピル)テトラメチルジシロキサン(以降SiDAと呼ぶ)1.24g(0.005モル)をNMP50gとともに加えて、40℃で2時間反応させた。次に末端封止剤として3-アミノフェノール(以降MAPと呼ぶ)4.36g(0.04モル)をNMP5gとともに加え、50℃で2時間反応させた。その後、N,N-ジメチルホルムアミドジエチルアセタール32.39g(0.22モル)をNMP50gで希釈した溶液を投入した。投入後、50℃で3時間撹拌した。撹拌終了後、溶液を室温まで冷却した後、溶液を水3Lに投入して白色沈殿を得た。この沈殿を濾過で集めて、水で3回洗浄した後、80℃の真空乾燥機で24時間乾燥し、アルカリ可溶性樹脂であるポリイミド前駆体(a-1)を得た。
下記反応式において(β-1)で表される化合物18.46g(0.05モル)、スルホラン120g、塩化亜鉛13.63gおよび4-エトキシアニリン20.58g(0.15モル)の混合物を170℃で8時間加熱撹拌をした。反応終了後、反応溶液を室温まで放冷した後、反応溶液を0~10℃の17.5%質量塩酸450gに滴下して1時間撹拌をした。続いて、析出物をろ取し、5質量%炭酸ナトリウム水溶液500gに加え、1時間撹拌をし、ろ取後に純水で洗浄し、60℃で24時間乾燥させ、窒素原子上の2つがアリール基で置換されたキサンテン化合物(β-2)を得た。
LC-MS(ESI、posi):m/z 963[M+H]+
LC-MS(ESI、nega):m/z 171[M]-。
d1-3-1:Solvent Blue 45(580nm以上800nm以下のいずれかの範囲に最大吸収波長を有する非イオン性染料)
e-1:4,4’,4’’-メチリジントリスフェノール(熱発色性化合物)
f12-1:1,2.4-トリヒドロキシベンゼン(いずれかのフェノール性水酸基に対するそれ以外のフェノール性水酸基の少なくとも1つの置換位置が、オルト位である条件およびパラ位である条件を満たす化合物(f))
g-1:2,4,6-トリス[ビス(メトキシメチル)アミノ]-1,3,5-トリアジン
GBL:γ-ブチロラクトン
EL:乳酸エチル
PGME:プロピレングリコールモノメチルエーテル。
ポリイミド前駆体(a-1)10.0g、イオン性染料(b1-1)1.1g、イオン性染料(b2-1)2.4g、キノンジアジド化合物(c-1)2.0g、(e-1)2.0gをGBL10g、EL20g、PGME70gに溶解した後、0.2μmのポリテトラフルオロエチレン製のフィルターでろ過し、ポジ型の感光性樹脂組成物AAを得た。得られた感光性樹脂組成物を用いて上記のように感度と残渣、膜厚1μm当たりのOD値、冷凍保存安定性、有機EL表示装置の長期信頼性、感光性樹脂組成物の固形分の総質量に対する全塩素、全臭素原子の質量の評価を行った。ただし、OD値に関する評価、および有機EL表示装置の長期信頼性評価は大気雰囲気下にてキュアした硬化膜を用いた。
アルカリ可溶性樹脂(a)、イオン性染料(b)、その他添加剤、溶剤の種類または配合量を表2に記載のとおり変更した以外は実施例1と同様にして、ポジ型の感光性樹脂組成物を得た。得られた感光性樹脂組成物を用いて感度と残渣、膜厚1μm当たりのOD値、冷凍保存安定性、有機EL表示装置の長期信頼性、感光性樹脂組成物の固形分の総質量に対する全塩素、全臭素原子の質量の評価を行った。ただし、OD値に関する評価、および有機EL表示装置の長期信頼性評価は大気雰囲気下にてキュアした硬化膜を用いた。
実施例5で得られた感光性樹脂組成物AEを用いて上記のように感度と残渣、膜厚1μm当たりのOD値、冷凍保存安定性、有機EL表示装置の長期信頼性、感光性樹脂組成物の固形分の総質量に対する全塩素、全臭素原子の質量の評価を行った。ただし、OD値に関する評価、および有機EL表示装置の長期信頼性評価は窒素雰囲気下にてキュアした硬化膜を用いた。
実施例3で得られた感光性樹脂組成物ACおよび実施例7で得られた感光性樹脂組成物AFを用いて、上記のように膜厚1μm当たりのOD値、繰り返しキュアによるOD値の変化量の評価を行った。ただし、1,2回目ともに大気雰囲気下にてキュアした硬化膜を用いた。
2:配線
3:TFT絶縁層
4:平坦化層
5:ITO(透明電極)
6:基板
7:コンタクトホール
8:絶縁層
11:表示装置
12:発光素子
13:硬化物
14、14c:金属配線
15:対向基板
16:電極端子
17:発光素子駆動基板
18:駆動素子
19:バリアメタル
20:はんだバンプ
21:無アルカリガラス基板
22:第一電極(透明電極)
23:補助電極
24:絶縁層
25:有機EL層
26:第二電極(非透明電極)
Claims (14)
- アルカリ可溶性樹脂(a)、分子間にて有機イオン同士のイオン対を形成するイオン性染料(b)、および感光性化合物(c)を含有する感光性樹脂組成物であって、該イオン性染料(b)をn種含み、該感光性樹脂組成物中に含まれる有機イオンが(n+1)種である感光性樹脂組成物。(nは2~10の整数を表す。)
- 前記イオン性染料(b)が350~800nmにおいて、490nm以上580nm未満の範囲のいずれかに最大吸収波長を有するイオン性染料(b1)および350~800nmにおいて、580nm以上800nm未満の範囲のいずれかに最大吸収波長を有するイオン性染料(b2)を含む請求項1に記載の感光性樹脂組成物。
- 前記イオン性染料(b)の有機アニオン部および/または有機カチオン部が、キサンテン骨格を有する請求項1または2に記載の感光性樹脂組成物。
- 前記イオン性染料(b)がスルホン酸基および/またはスルホナート基を有する請求項1~3のいずれかに記載の感光性樹脂組成物。
- 前記アルカリ可溶性樹脂(a)が、ポリイミド、ポリイミド前駆体、ポリベンゾオキサゾール、ポリベンゾオキサゾール前駆体、ポリアミドイミド、ポリアミドイミド前駆体およびそれらの共重合体からなる群より選択される1種類以上を含む請求項1~4のいずれかに記載の感光性樹脂組成物。
- 前記イオン性染料(b)が酸性染料の有機アニオン部と塩基性染料の有機カチオン部からなる造塩化合物を含む請求項1~5のいずれかに記載の感光性樹脂組成物。
- 前記感光性樹脂組成物中に含まれる全塩素原子と全臭素原子の総質量が、感光性樹脂組成物中から溶剤を除いた固形分の総質量に対して、150ppm以下である請求項1~7のいずれかに記載の感光性樹脂組成物。
- 請求項1~8のいずれかに記載の感光性樹脂組成物を硬化した硬化物。
- 基板上に、請求項1~8のいずれかに記載の感光性樹脂組成物からなる樹脂膜を形成する工程、該樹脂膜を露光する工程、露光した樹脂膜を現像する工程および現像した樹脂膜を加熱処理する工程を含む硬化物の製造方法。
- 基板上に、駆動回路、平坦化層、第一電極、絶縁層、発光層、および第二電極を有する有機EL表示装置であって、該平坦化層および/または絶縁層が請求項9に記載の硬化物を有する有機EL表示装置。
- 前記絶縁層が前記硬化物を有し、前記絶縁層の膜厚1μm当たりの可視光における光学濃度が0.5~1.0である請求項11に記載の有機EL表示装置。
- 前記有機EL表示装置がさらにブラックマトリクスを有するカラーフィルタを具備する請求項11または12に記載の有機EL表示装置。
- 少なくとも金属配線、請求項9に記載の硬化物、および複数の発光素子を有する表示装置であって、前記発光素子はいずれか一方の面に一対の電極端子を具備し、前記一対の電極端子は前記硬化物中に延在する複数本の前記金属配線と接続し、複数本の前記金属配線は、前記硬化物により電気的絶縁性を保持する構成である、表示装置。
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| JPH07261015A (ja) * | 1994-03-25 | 1995-10-13 | Sumitomo Chem Co Ltd | ブラックマトリックス用色素、該色素を含むレジスト組成物、当該組成物を用いてブラックマトリックスを製造する方法、及び該方法により得られるブラックマトリックス |
| JP2012194526A (ja) * | 2011-03-02 | 2012-10-11 | Toyo Ink Sc Holdings Co Ltd | カラーフィルタ用着色組成物およびカラーフィルタ |
| JP5836126B2 (ja) * | 2009-09-25 | 2015-12-24 | 東洋インキScホールディングス株式会社 | 着色組成物及びカラーフィルタ |
| JP2018063433A (ja) * | 2015-04-01 | 2018-04-19 | 東レ株式会社 | 感光性着色樹脂組成物 |
| JP2020187157A (ja) * | 2019-05-10 | 2020-11-19 | 東洋インキScホールディングス株式会社 | カラーフィルタ用着色組成物及びカラーフィルタ |
| JP2021086104A (ja) * | 2019-11-29 | 2021-06-03 | 東洋インキScホールディングス株式会社 | カラーフィルタ用着色組成物及びカラーフィルタ |
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| JP4360168B2 (ja) | 2002-10-01 | 2009-11-11 | 東レ株式会社 | ポジ型感光性樹脂組成物 |
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Patent Citations (6)
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|---|---|---|---|---|
| JPH07261015A (ja) * | 1994-03-25 | 1995-10-13 | Sumitomo Chem Co Ltd | ブラックマトリックス用色素、該色素を含むレジスト組成物、当該組成物を用いてブラックマトリックスを製造する方法、及び該方法により得られるブラックマトリックス |
| JP5836126B2 (ja) * | 2009-09-25 | 2015-12-24 | 東洋インキScホールディングス株式会社 | 着色組成物及びカラーフィルタ |
| JP2012194526A (ja) * | 2011-03-02 | 2012-10-11 | Toyo Ink Sc Holdings Co Ltd | カラーフィルタ用着色組成物およびカラーフィルタ |
| JP2018063433A (ja) * | 2015-04-01 | 2018-04-19 | 東レ株式会社 | 感光性着色樹脂組成物 |
| JP2020187157A (ja) * | 2019-05-10 | 2020-11-19 | 東洋インキScホールディングス株式会社 | カラーフィルタ用着色組成物及びカラーフィルタ |
| JP2021086104A (ja) * | 2019-11-29 | 2021-06-03 | 東洋インキScホールディングス株式会社 | カラーフィルタ用着色組成物及びカラーフィルタ |
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