JP2022189243A - Pigment dispersion composition for black matrix, resist composition for black matrix, and black resist film - Google Patents

Abstract

To provide a pigment dispersion composition for black matrix that can give a resist composition having excellent fine-line adhesion.SOLUTION: A pigment dispersion composition for black matrix contains carbon black, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersion aid, an epoxy resin, an alkali-soluble resin, and a solvent. The carbon black is surface-treated carbon black treated with an inorganic aluminum salt.SELECTED DRAWING: None

Description

The present invention relates to a black matrix pigment dispersion composition, a black matrix resist composition, and a black resist film.

Conventionally, a resist composition using a black matrix pigment dispersion composition containing carbon black, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersing aid, an epoxy resin, a polyfunctional thiol compound, and a solvent is known. (Patent Document 1). Further, it is known that the black matrix can be improved in hiding power by using a carbon black having a surface coated (fixed) with a dye via a metal salt or the like.

Japanese Patent Application Laid-Open No. 2021-38289 WO2013/129554

Patent Document 1 discloses that a resist composition using a black matrix pigment dispersion composition is excellent in fine line adhesion. there was a problem. Therefore, there has been a demand for a black matrix pigment dispersion composition that provides a resist composition with excellent fine line adhesion by a method different from such compositions.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pigment dispersion composition for a black matrix that provides a resist composition having excellent fine line adhesion.

That is, the present invention contains carbon black, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersing aid, an epoxy resin, an alkali-soluble resin, and a solvent, and the carbon black is treated with an inorganic aluminum salt. The present invention relates to a black matrix pigment dispersion composition which is surface-treated carbon black.

The present invention also relates to a black matrix resist composition comprising the black matrix pigment dispersion composition, a photopolymerizable compound, and a photopolymerization initiator.

Furthermore, the present invention relates to a black resist film obtained using the black matrix resist composition.

The black matrix pigment dispersion composition of the present invention contains carbon black, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersing aid, an epoxy resin, an alkali-soluble resin, and a solvent. It is a surface-treated carbon black treated with an aluminum salt. In particular, the surface-treated carbon black has moderate hydrophilicity compared to untreated carbon black, and can suppress elution and peeling of the pattern portion formed by alkali development and washing with water, so the black matrix of the present invention The pigment dispersion composition for .

The black matrix pigment dispersion composition of the present invention contains carbon black, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersing aid, an epoxy resin, an alkali-soluble resin, and a solvent. It is a surface-treated carbon black treated with an aluminum salt.

<Surface-treated carbon black>
The surface-treated carbon black is obtained by treating the surface of carbon black with an inorganic aluminum salt.

As the carbon black, known carbon blacks used in black matrix pigment dispersion compositions can be used, and examples thereof include acetylene black, channel black, furnace black, and ketjen black. Specific examples of the carbon black include MA7, MA8, MA11, MA14, #1000, #2350, etc. manufactured by Mitsubishi Chemical Corporation, Special Black350, SpecialBlack250, SpecialBlack550, NEROX2500, NEROX3500, NEROX305, etc. manufactured by Orion Engineered Carbons. , Cabot's MOGULL, REGAL400R, TPK1101R, TPK1104R, TPK1227R, etc., Columbian Carbon Co.'s RAVEN1200, RAVEN1250, RAVEN1255, RAVEN1190U, RAVEN1170, RAVEN1035, RAVEN1080U, RAVEN1060, etc. The carbon black has a pH of 5 or less, is preferably acidic carbon black having an acidic group such as a carboxyl group, and preferably has a particle size of 20 to 60 nm. Examples of the acidic carbon black include NEROX2500, NEROX3500, TPK1101R, TPK1104R and TPK1227R. The particle size means the average primary particle size measured or calculated by microscopic observation, but in the case of commercial products, the catalog value is used as a reference. The carbon black can be used alone or in combination of two or more.

Any known inorganic aluminum salt can be used as the inorganic aluminum salt, and examples thereof include aluminum sulfate, (poly)aluminum chloride, and aluminum nitrate.

In the surface-treated carbon black, the amount of the inorganic aluminum used is preferably 0.5 parts by mass or more, and 8 parts by mass or more, relative to 100 parts by mass of the carbon black, from the viewpoint of fine wire adhesion. From the viewpoint of blackness, it is preferably 200 parts by mass or less, more preferably 150 parts by mass or less.

The surface-treated carbon black is preferably 3% by mass or more, preferably 10% by mass or more, in the black matrix pigment dispersion composition, from the viewpoint of enhancing the light-shielding property when a black matrix film is formed. More preferably, from the viewpoint of pigment dispersion, the content is preferably 70% by mass or less, and more preferably 50% by mass or less.

The surface treatment method for the surface-treated carbon black is not particularly limited. For example, while stirring (flowing) the carbon black in a mixer or blender, 1) the inorganic aluminum salt or the inorganic aluminum salt is added. 2) a method of spraying the aqueous solution containing the inorganic aluminum salt using a sprayer such as a sprayer; A method of adding an inorganic aluminum salt for treatment and the like can be mentioned.

<Basic group-containing pigment dispersant>
The basic group-containing pigment dispersant may be any known basic group-containing pigment dispersant used in a black matrix pigment dispersion composition, as long as it can disperse the carbon black. Examples include anionic surfactants, Basic group-containing polyester pigment dispersants, basic group-containing acrylic pigment dispersants, basic group-containing urethane pigment dispersants, basic group-containing carbodiimide pigment dispersants, and the like. As the basic group, a primary, secondary or tertiary amino group is preferable from the viewpoint of excellent dispersibility. The basic group-containing pigment dispersants may be used alone or in combination of two or more.

The basic group-containing pigment dispersant is preferably a polymer-type basic group-containing pigment dispersant from the viewpoint of obtaining good pigment dispersibility. Examples of the polymer-type basic group-containing pigment dispersant include a basic group-containing urethane polymer pigment dispersant, a basic group-containing polyester polymer pigment dispersant, and a basic group-containing acrylic polymer pigment. Dispersants and the like are included. Among these, a basic group-containing urethane polymer pigment dispersant and a basic group-containing acrylic polymer pigment dispersant are preferred. The basic group-containing urethane-based polymeric pigment dispersant is more preferably a basic group-containing urethane-based polymeric pigment dispersant having at least one selected from the group consisting of polyester chains, polyether chains, and polycarbonate chains. .

The amount of the basic group-containing pigment dispersant is preferably 1 to 100 parts by mass, more preferably 2 to 50 parts by mass, relative to 100 parts by mass of the surface-treated carbon black.

<Acidic Group-Containing Pigment Dispersion Aid>
The acidic group-containing pigment dispersing aid is used for the purpose of further improving the dispersibility of the pigment. compounds, phthalocyanine-based compounds and their metal complexes, dyes such as anthraquinone, naphthalene, acridone, or triazine into which acidic groups such as carboxyl groups and sulfonic groups are introduced (dye derivatives having acidic groups); Examples include compounds neutralized with organic amines and the like. As the dye derivative having an acidic group, a phthalocyanine dye derivative (having a phthalocyanine skeleton) having a sulfonic acid group is preferable from the viewpoint of good dispersibility of carbon black. The acidic group-containing pigment dispersing aid may be used alone or in combination of two or more.

The acidic group-containing pigment dispersing aid is preferably 0.1 to 20 parts by mass, more preferably 1 to 10 parts by mass, relative to 100 parts by mass of the surface-treated carbon black.

<Epoxy resin>
The epoxy resin is a polyfunctional epoxy resin having two or more epoxy groups. Examples of the epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, biphenol type epoxy resin, alicyclic epoxy resin, aliphatic chain epoxy resin, glycidyl ester type epoxy resin, Glycidyl etherified products of condensates of phenol compounds (phenol, cresol, alkylphenol, catechol, bisphenol F, bisphenol A, bisphenol S, etc.) and aldehyde compounds (formaldehyde, salicylaldehyde, etc.), glycidyl etherified products of bifunctional phenol, bifunctional Examples include glycidyl etherified alcohols, glycidyl etherified trifunctional or higher polyphenols, and hydrogenated products or halides thereof. The epoxy resin may be a polyfunctional epoxy resin having an alicyclic or aromatic ring, or may be a polyfunctional epoxy resin having an alicyclic dicyclopentadiene skeleton. From the viewpoint of improving the polyfunctional epoxy resin having an aromatic ring is preferred. Specific examples of the epoxy resin include Epolite 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 EX-212L, Denacol EX-214L, Denacol EX-216L, Denacol EX-850L, Denacol EX-321L (manufactured by Nagase ChemteX Corporation), GAN, GOT, NC3000, NC6000, EPPN502H (manufactured by Nippon Kayaku Co., Ltd.) ), Epikote 828, Epikote 1002, Epikote 1750, Epikote 1007, YX8100-BH30, E1256, E4250, E4275 (manufactured by Japan Epoxy Resin Co., Ltd.), Epikron EXA-9583, Epikron N695, HP7200, HP4032 (manufactured by Dainippon Ink Kagaku Kogyo Co., Ltd.), VG3101 (manufactured by Mitsui Chemicals, Inc.), Tepic S, Tepic G, Tepic P (all of which are manufactured by Nissan Chemical Industries, Ltd.), and Potato YH-434L (manufactured by Tohto Kasei Co., Ltd.). In terms of reactivity and the like, the epoxy resin preferably does not have an indane structure or a biphenyl structure.

As the epoxy resin, for example, polyfunctional epoxy resins having aromatic rings represented by the following formulas 1 to 7 are preferably exemplified.

From the viewpoint of the resistance value as a black matrix, the epoxy resin is 1 part by mass or more with respect to 100 parts by mass of carbon black contained in the black matrix pigment dispersion composition or the black matrix resist composition described later. It is preferably 2 parts by mass or more, more preferably 5 parts by mass or more, and from the viewpoint of blackness due to pigment concentration, it is preferably 30 parts by mass or less, and 20 parts by mass. It is more preferably 15 parts by mass or less, more preferably 15 parts by mass or less.

<Alkali-soluble resin>
The alkali _- soluble resin is not particularly limited as long as it can be dissolved in an alkaline developer. Resins containing one or more are preferred. The said alkali-soluble resin can be used individually or in combination of 2 or more types.

From the viewpoint of alkali developability, the acid value of the alkali-soluble resin is preferably 10 mgKOH/g or more and 300 mgKOH/g or less, more preferably 20 mgKOH/g or more and 200 mgKOH/g or less.

The weight-average molecular weight of the alkali-soluble resin is preferably 5,000 or more, more preferably 10,000 or more, from the viewpoint of forming a resist film. The weight average molecular weight of the alkali-soluble resin is preferably 100,000 or less, more preferably 50,000 or less, from the viewpoint of increasing the solubility in an alkali developer.

The weight average molecular weight can be measured by a gel permeation chromatography (GPC) method. As an example, Water 2690 (manufactured by Waters) as a GPC apparatus, PLgel, 5 μm, MIXED-D (manufactured by Polymer Laboratories) as a column, tetrahydrofuran as a developing solvent, column temperature 25 ° C., flow rate 1 ml / min, RI Chromatography is performed under the conditions of a detector, a sample injection concentration of 10 mg/ml, and an injection amount of 100 microliters, and the polystyrene equivalent weight average molecular weight can be obtained.

Examples of the alkali-soluble resin include alkali-soluble polyimide resins, alkali-soluble polyimide precursors, alkali-soluble polybenzoxazole resins, alkali-soluble polybenzoxazole precursors, alkali-soluble cardo resins, alkali-soluble epoxy (meth)acrylate resins, alkali Soluble polysiloxane resins, alkali-soluble novolak resins, alkali-soluble (meth)acrylic resins, alkali-soluble polyurethane resins, alkali-soluble polyester resins and the like can be mentioned. Among these, alkali-soluble cardo resins and alkali-soluble epoxy (meth)acrylate resins are preferable from the viewpoint of the heat resistance of the coating film.

The alkali-soluble cardo resin refers to an alkali-soluble resin having a cardo skeleton. The cardo skeleton is a quaternary carbon atom, which is a ring carbon atom constituting a cyclic structure, and two aromatic groups are single-bonded. Refers to the connected skeleton. Specific examples of the alkali-soluble cardo resin include ADEKA ARKLS WR-301 (manufactured by ADEKA), Oxol CR-TR1, CR-TR2, CR-TR3, CR-TR4, CR-TR5, CR-TR6 (the above, Osaka Gas Chemical Co., Ltd.).

The alkali-soluble epoxy (meth)acrylate resin is a carboxyl group possessed by an ethylenically unsaturated monocarboxylic acid, which is introduced with an ethylenically unsaturated group by ring-opening addition to an epoxy group possessed by an epoxy resin, and an epoxy group. Among the acid-modified epoxy resins obtained by introducing carboxyl groups by adding a polybasic carboxylic acid (or its anhydride) to at least part of the hydroxyl groups generated by the ring opening, the above cardo skeleton has First, it refers to a resin corresponding to the above-mentioned alkali-soluble resin. In the alkali-soluble epoxy (meth)acrylate resin, examples of the base material epoxy resin include bisphenol A-type epoxy resin, bisphenol F-type epoxy resin, epoxy resin having a biphenyl structure, phenol novolak-type epoxy resin, and cresol novolak-type epoxy resin. Epoxy resins are preferred. Preferred examples of the ethylenically unsaturated monocarboxylic acid used to modify the epoxy resin include acrylic acid and methacrylic acid. Preferred examples of polybasic carboxylic acids (or anhydrides thereof) include maleic anhydride, succinic anhydride, and tetrahydrophthalic anhydride. Among these, an alkali-soluble epoxy (meth)acrylate resin having a biphenyl skeleton is preferable from the viewpoint of improving fine wire adhesion. Specific examples of the alkali-soluble epoxy (meth)acrylate resin include ZAR-1494H, ZAR-2001H, ZFR-1491H, ZCR-1797H, ZCR-1569H and ZCR-1798H (manufactured by Nippon Kayaku). be done. Preferred specific examples include alkali-soluble epoxy (meth)acrylate resins having a partial structure represented by any of the following structural formulas.

The alkali-soluble resin is preferably 1 to 70 parts by mass, more preferably 5 to 30 parts by mass, with respect to 100 parts by mass of the surface-treated carbon black.

<Solvent>
As the solvent, a known solvent used in black matrix pigment dispersion compositions can be used. From the viewpoint that the solvent can stably disperse the pigment and sufficiently dissolve the basic group-containing pigment dispersant and the alkali-soluble resin, the solvent is an ester solvent, an ether solvent, an ether ester solvent, or a ketone. system solvents, aromatic hydrocarbon solvents, nitrogen-containing solvents and the like are preferred. The solvents may be used alone or in combination of two or more.

Examples of the ester solvent include methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate, ethyl 2-hydroxy-2-methylpropionate, 3-methyl-3-methoxybutylpropionate, and methyl 3-methoxypropionate. , ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl ethoxyacetate, hydroxyacetic acid ester, n-amyl formate and the like. Examples of the ether solvent include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether. , propylene glycol monobutyl ether, diethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether and the like. Examples of the ether ester solvent include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate and the like. Examples of the ketone solvent include methyl isobutyl ketone, cyclohexanone, 2-heptanone, δ-butyrolactone and the like. Examples of the aromatic hydrocarbon solvent include toluene, xylene, alkylnaphthalene, and the like. Examples of the nitrogen-containing solvent include N-methylpyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide and the like.

The proportion of the solvent in the black matrix pigment dispersion composition is preferably 40% by mass or more, more preferably 50% by mass or more, from the viewpoint of processability, and from the viewpoint of dispersion stability. Therefore, it is preferably 90% by mass or less, more preferably 80% by mass or less.

If necessary, additives such as a leveling agent, a resin other than the epoxy resin and the alkali-soluble resin, an antioxidant, and an antifoaming agent may be added to the black matrix pigment dispersion composition. . However, from the viewpoint of odor, it is preferable not to include a thiol compound (for example, a thiol compound having a molecular weight of 1000 or less).

In the black matrix pigment dispersion composition, the total ratio of the carbon black, the basic group-containing pigment dispersant, the acidic group-containing pigment dispersing aid, the epoxy resin, the alkali-soluble resin, and the solvent is It is preferably 75% by mass or more, more preferably 85% by mass or more, and even more preferably 95% by mass or more.

The black matrix pigment dispersion composition may be prepared by dispersing each of the above components using a roll mill, kneader, high-speed stirrer, bead mill, ball mill, sand mill, ultrasonic disperser, high-pressure disperser, or the like.

<Black matrix resist composition>
The black matrix resist composition of the present invention comprises the black matrix pigment dispersion composition, a photopolymerizable compound, and a photopolymerization initiator. The proportion of the surface-treated carbon black is preferably 30% by mass or more and 80% by mass or less in the solid content of the black matrix resist composition.

<Photopolymerizable compound>
As the photopolymerizable compound, known photopolymerizable compounds used in black matrix resist compositions can be used, and examples thereof include monomers and oligomers having photopolymerizable unsaturated bonds. The photopolymerizable compounds may be used alone or in combination of two or more.

Monomers having one photopolymerizable unsaturated bond include, for example, alkyl methacrylates or acrylates such as methyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, methyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate; benzyl methacrylate, benzyl acrylate, etc. aralkyl methacrylates or acrylates of butoxyethyl methacrylate, alkoxyalkyl methacrylates or acrylates such as butoxyethyl acrylate; aminoalkyl methacrylates or acrylates such as N,N-dimethylaminoethyl methacrylate, N,N-dimethylaminoethyl acrylate; diethylene glycol monoethyl ether , triethylene glycol monobutyl ether, dipropylene glycol monomethyl ether and other polyalkylene glycol monoalkyl ether methacrylates or acrylic acid esters; polyalkylene glycol monoaryl ether methacrylic acid esters or acrylic acid esters such as hexaethylene glycol monophenyl ether ester; isobornyl methacrylate or acrylate; glycerol methacrylate or acrylate; 2-hydroxyethyl methacrylate or acrylate;

Monomers having two or more photopolymerizable unsaturated bonds include, for example, bisphenol A dimethacrylate, 1,4-butanediol dimethacrylate, 1,3-butylene glycol dimethacrylate, diethylene glycol dimethacrylate, glycerol dimethacrylate, and neopentyl. Glycol dimethacrylate, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol tetramethacrylate, dipentaerythritol hexamethacrylate, dipenta Erythritol pentamethacrylate, bisphenol A diacrylate, 1,4-butanediol diacrylate, 1,3-butylene glycol diacrylate, diethylene glycol diacrylate, glycerol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, polypropylene glycol diacrylate , tetraethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate and the like.

Examples of the oligomer having a photopolymerizable unsaturated bond include those obtained by appropriately polymerizing the above monomers.

The photopolymerizable compound is preferably 2 to 20% by mass, more preferably 4 to 15% by mass, based on the solid content of the black matrix resist composition.

As the photopolymerization initiator, known photopolymerization initiators used in black matrix resist compositions can be used. 4'-dimethylaminobenzophenone, benzyl, 2,2-diethoxyacetophenone, benzoin, benzoin methyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, α-hydroxyisobutylphenone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclohexylphenyl ketone , t-butylanthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chloro-2-methylanthraquinone, 2-ethylanthraquinone, 1,4-naphthoquinone, 1,2-benzoanthraquinone, 1,4-dimethyl Examples include anthraquinone, 2-phenylanthraquinone, triazine photopolymerization initiators, oxime ester photopolymerization initiators, and the like. The photopolymerization initiators may be used alone or in combination of two or more.

The content of the photopolymerization initiator is preferably 0.1 to 15% by mass, more preferably 1 to 10% by mass, based on the solid content of the black matrix resist composition.

From the viewpoint of developability with an alkaline developer, the above-mentioned alkali-soluble resin may be further added to the black matrix resist composition. Moreover, the total content of the alkali-soluble resin is preferably 10% by mass or more and 50% by mass or less in the solid content of the black matrix resist composition. From the viewpoint of improving paintability, the black matrix resist composition may further contain the above solvent. The total proportion of the solvent is preferably 50% by mass or more, more preferably 70% by mass or more, in the black matrix resist composition.

Additives such as a leveling agent, an antioxidant, and an antifoaming agent may be added to the black matrix resist composition, if necessary.

The black matrix resist composition may be prepared by stirring and mixing components such as the black matrix pigment dispersion composition, the photopolymerizable compound, and the photopolymerization initiator using a stirrer or the like.

EXAMPLES The present invention will be described below with reference to Examples and the like, but the present invention is not limited to these.

<Preparation Examples A to E>
<Preparation of surface-treated carbon black>
Various raw materials shown in Table 1 were mixed so as to have the composition (parts by mass) shown in Table 1, and then stirred at room temperature for 12 hours. Thereafter, suction filtration was performed, followed by repeated washing with purified water and drying to obtain surface-treated carbon blacks A to E.

In Table 1, TPK1104R is acidic carbon black (oil absorption: 38 ml/100 g, pH about 3.0, manufactured by Cabot Corporation);
SS12000S is a phthalocyanine dye derivative having a sulfonic acid group (manufactured by Lubrizol);
Alphane 83 is a polyaluminum chloride aqueous solution (23% in terms of aluminum oxide, manufactured by Taimei Chemical Industry Co., Ltd.);
Liquid aluminum sulfate indicates an aqueous solution of aluminum sulfate (8% in terms of aluminum oxide, manufactured by Taimei Chemical Industry Co., Ltd.).

<Examples 1-1 to 4-1, Comparative Examples 1-1 to 2-1>
<Preparation of black matrix pigment dispersion composition>
Various raw materials shown in Table 2 were mixed so as to have the composition (% by mass) shown in Table 2, and then kneaded with a bead mill to prepare black matrix pigment dispersion compositions of each preparation example and comparative preparation examples. .

In Table 2, DB167 is an amino group-containing polyurethane polymer dispersant having a polyester chain (manufactured by BYK-Chemie, solid content 52% by mass);
SS12000S is a phthalocyanine dye derivative having a sulfonic acid group (manufactured by Lubrizol);
VG3101L is an epoxy resin (solid content 100%, manufactured by Printec);
ZCR-1569H is an alkali-soluble epoxy (meth)acrylate resin having a biphenyl skeleton (solid content 69%, manufactured by Nippon Kayaku Co., Ltd.);
PGMEA indicates propylene glycol monomethyl ether acetate;

<Examples 1-2 to 4-2, Comparative Examples 1-2 to 2-2>
<Preparation of resist composition for black matrix>
Various raw materials shown in Table 3 were mixed using a high-speed stirrer so that the composition (% by mass) shown in Table 3 was obtained, and then filtered through a filter with a pore size of 0.5 μm. A black matrix resist composition was prepared.

<Evaluation of Fine Line Adhesion of Black Resist Film>
Each of the black matrix resist compositions prepared in Examples and Comparative Examples was applied on a glass substrate (EAGLE XG) by a spin coater to a film thickness of 1 μm, and prebaked at 100° C. for 3 minutes. Then, using a photomask having a line pattern with a line width of 1 μm to 20 μm and an interval of 1 μm, exposure was performed using a high-pressure mercury lamp with an integrated UV light amount of 100 mJ/cm ² . After that, development was started at the time (break point) when the development pattern started to appear under a shower development pressure of 1 kgf/cm ² in a 0.05% potassium hydroxide aqueous solution at 23° C., and the time reached twice the break point. The development was terminated at the point where the film was exposed, and the film was washed with a spray of water at a pressure of 1 kgf/cm ² . The size (μm) of the minimum line pattern remaining on the glass substrate was evaluated. Table 3 shows the results.

In Table 3, DPHA is dipentaerythritol hexaacrylate;
OXE02 is an oxime ester photopolymerization initiator (manufactured by BASF Japan);
WR-301 is an alkali-soluble cardo resin (44% solids, manufactured by ADEKA);
PGMEA indicates propylene glycol monomethyl ether acetate;

Claims (8)

Carbon black, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersing aid, an epoxy resin, an alkali-soluble resin, and a solvent,
A pigment dispersion composition for a black matrix, wherein the carbon black is a surface-treated carbon black treated with an inorganic aluminum salt. 2. The black matrix pigment dispersion composition according to claim 1, wherein the inorganic aluminum salt is one or more selected from the group consisting of aluminum chloride and aluminum sulfate. 3. The black matrix pigment dispersion composition according to claim 1, wherein the carbon black is acidic carbon black. 4. The black matrix pigment dispersion composition according to claim 1, wherein the epoxy resin is a polyfunctional epoxy resin having an aromatic ring. 5. The black matrix pigment dispersion composition according to claim 1, wherein the alkali-soluble resin is an alkali-soluble epoxy (meth)acrylate resin having a biphenyl skeleton. 6. The black matrix pigment dispersion composition according to claim 1, wherein the acidic group-containing pigment dispersing aid has a phthalocyanine skeleton. 7. A black matrix resist composition comprising the black matrix pigment dispersion composition according to claim 1, a photopolymerizable compound, and a photopolymerization initiator. A black resist film obtained by using the black matrix resist composition according to claim 7 .