WO2013129403A1 - ブラックマトリックス用感光性樹脂組成物およびその製造方法 - Google Patents
ブラックマトリックス用感光性樹脂組成物およびその製造方法 Download PDFInfo
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- WO2013129403A1 WO2013129403A1 PCT/JP2013/054970 JP2013054970W WO2013129403A1 WO 2013129403 A1 WO2013129403 A1 WO 2013129403A1 JP 2013054970 W JP2013054970 W JP 2013054970W WO 2013129403 A1 WO2013129403 A1 WO 2013129403A1
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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
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/08—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated side groups
- C08F290/14—Polymers provided for in subclass C08G
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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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
Definitions
- the present invention relates to a photosensitive resin composition for a black matrix of a color filter which is suitable for forming a black matrix having a fine line pattern with high light shielding and high resistance and excellent in storage stability, and a method for producing the same.
- color liquid crystal display devices have been used in various fields such as liquid crystal televisions, liquid crystal monitors, and color liquid crystal mobile phones.
- the color filter is one of the important components that influence the visibility of color liquid crystal display devices.
- the black matrix of the color filter further increases the light shielding. Therefore, it is necessary to add a light shielding material such as a pigment to the photosensitive resin composition in a larger amount than before.
- the present inventors previously used a pigment dispersion in which a specific epoxy (meth) acrylate acid adduct is used as an alkali-soluble resin used for pigment dispersion, and these are co-dispersed with a dispersant.
- the photosensitive resin composition for color filters was proposed (refer patent document 1). According to such a photosensitive resin composition, the photosensitive resin composition has high sensitivity and high adhesion performance to a glass substrate in a region containing a light-shielding material such as a high-concentration pigment that achieves high light-shielding with a black matrix. Excellent storage stability of the product can be achieved.
- the present invention has been made in view of the above problems, and the object of the present invention is to develop adhesion when a thin line pattern is formed while maintaining high light shielding and high resistance in the photosensitive resin composition. Is to provide a photosensitive resin composition for a black matrix and a method for producing the same.
- the present invention provides the following components (A1) to (A4): (A1) Dye-coated carbon black whose surface is coated with a dye, (A2) a dispersant, (A3) an unsaturated group-containing alkali-soluble resin having a structure represented by the following general formula (I): (A4) After preparing a (A) pigment dispersion having a solvent in advance, the following components (B) to (E) as essential components: (B) an unsaturated group-containing alkali-soluble resin, (C) a photopolymerizable monomer having an ethylenically unsaturated bond, (D) a photopolymerization initiator, (E) It is a manufacturing method of the photosensitive resin composition for color filter black matrices characterized by mixing the compounding component containing a solvent and the said (A) pigment dispersion.
- R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen atom or a phenyl group, and R 5 represents a hydrogen atom or Represents a methyl group
- A represents —CO—, —SO 2 —, —C (CF 3 ) 2 —, —Si (CH 3 ) 2 —, —CH 2 —, —C (CH 3 ) 2 —, — O— represents a 9,9-fluorenyl group or a direct bond
- X represents a tetravalent carboxylic acid residue
- Y 1 and Y 2 each independently represent a hydrogen atom or —OC—Z— (COOH) m (Wherein Z represents a divalent or trivalent carboxylic acid residue, m represents a number of 1 to 2), and n represents an integer of 1 to 20. ]
- the present invention also includes the following components (A1) to (A4): (A1) Dye-coated carbon black whose surface is coated with a dye, (A2) a dispersant, (A3) an unsaturated group-containing alkali-soluble resin having a structure represented by the following general formula (I): (A4) a pigment dispersion prepared in advance with a solvent, and the following components (B) to (E) as essential components: (B) an unsaturated group-containing alkali-soluble resin, (C) a photopolymerizable monomer having an ethylenically unsaturated bond, (D) a photopolymerization initiator, (E) A photosensitive resin composition for a color filter black matrix, comprising a blended component containing a solvent.
- R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen atom or a phenyl group, and R 5 represents a hydrogen atom or Represents a methyl group
- A represents —CO—, —SO 2 —, —C (CF 3 ) 2 —, —Si (CH 3 ) 2 —, —CH 2 —, —C (CH 3 ) 2 —, — O— represents a 9,9-fluorenyl group or a direct bond
- X represents a tetravalent carboxylic acid residue
- Y 1 and Y 2 each independently represent a hydrogen atom or —OC—Z— (COOH) m (Wherein Z represents a divalent or trivalent carboxylic acid residue, m represents a number of 1 to 2), and n represents an integer of 1 to 20. ]
- the present invention also relates to (A1) the dye-coated carbon black, wherein the dye content is 0.5 to 10% by mass, the photosensitive resin composition for color filter black matrix according to (2) It is.
- the present invention is also the photosensitive resin composition for a color filter black matrix according to any one of (2) to (3), wherein the dye-coated carbon black is an anionic or nonionic dye. is there.
- the present invention also provides the photosensitive resin composition for a color filter black matrix according to any one of (2) to (4), wherein the dye-coated carbon black is a dark-colored dye. It is.
- the present invention also provides the dye-coated carbon black, wherein the dye is raked with a metal or a metal salt, and the color filter black matrix photosensitivity according to any one of (2) to (5) It is a resin composition.
- the present invention also provides the photosensitive resin composition for a color filter black matrix according to (6), wherein the metal or metal salt is aluminum, magnesium, calcium, strontium, barium, manganese, or a salt thereof. is there.
- a photosensitive resin composition for a color filter black matrix is obtained using carbon black having at least one acidic functional group on the surface.
- the acidic functional group may be a hydroxyl group, oxo group, hydroperoxy group, carbonyl group, carboxyl group, peroxycarboxylic acid group, aldehyde group, ketone group, nitro group, nitroso group, amide group, imide.
- This is a photosensitive resin composition for a color filter black matrix.
- the present invention is also the color filter black matrix according to any one of (2) to (9), wherein the blending amount of the (A3) unsaturated group-containing alkali-soluble resin is 2 to 20% by mass. Photosensitive resin composition.
- the blending amount of (A1) dye-coated carbon black in the solid content of the photosensitive resin composition is 45 to 60% by mass, and any one of (2) to (10) Or a photosensitive resin composition for a color filter black matrix.
- any one of (2) to (11), wherein at least a part of the component (B) is an unsaturated group-containing alkali-soluble resin represented by the general formula (I) in (1) The photosensitive resin composition for color filters described in 1.
- the present invention is also a coating film formed by curing the photosensitive resin composition for color filter black matrix of (2) to (12).
- the present invention is also obtained by coating the photosensitive resin composition for black matrix described in (2) to (12), forming a film, photocuring selective positions, and developing with an alkaline developer. Black matrix.
- the present invention is also a color filter in which the black matrix described in (14) is formed.
- the photosensitive resin composition for black matrix of the present invention is produced by using a pigment dispersion comprising a dye-coated carbon black whose surface is coated with a dye and a specific epoxy (meth) acrylate acid adduct.
- This is a photosensitive resin composition for black matrix, which has excellent storage stability, coating coating properties and developability, and is a fine line pattern with high light shielding, high resistance, and excellent adhesion to a glass substrate.
- a highly reliable black matrix having a high light-shielding property and a high resistance can be produced.
- the photosensitive resin composition for a black matrix of the present invention first prepares (A) a pigment dispersion, and its constituent components are (A1) dye-coated carbon black, (A2) a dispersant, (A3) general formula ( An unsaturated group-containing alkali-soluble resin having the structure of I), and (A4) a solvent.
- the type of raw material carbon black used in the dye-coated carbon black of the present invention is not particularly limited, and known carbon blacks such as lamp black, acetylene black, thermal black, channel black, and furnace black may be used. it can.
- the raw material carbon black preferably has an average primary particle size of 5 to 60 nm, more preferably 10 to 50 nm, and particularly preferably 20 to 45 nm.
- the average primary particle diameter means an arithmetic average value of primary particle diameters obtained by observing 1500 carbon black primary particles with an electron microscope. If the average primary particle size of the raw material carbon black is less than the above lower limit, aggregation tends to occur and the stability of the mill base is deteriorated, making it difficult to disperse at a high concentration.On the other hand, if the upper limit is exceeded, the black matrix tends to cause shape defects. Since the surface roughness becomes worse, neither is preferable.
- the raw material carbon black preferably has a DBP absorption of 100 ml / 100 g or less.
- DBP absorption refers to the capacity of dibutyl phthalate (DBP) absorbed by 100 g of carbon black, and is measured according to the method described in JIS K6217-4.
- DBP absorption amount of the raw material carbon black exceeds the above upper limit, the resistance value is lowered and the viscosity is increased, so that the coating property is deteriorated and the blackness is lowered.
- the raw material carbon black preferably has a pH value of 2 to 10, more preferably 5 to 9, and particularly preferably 4 to 8.
- the pH value is a value obtained by measuring a mixed solution of carbon black and distilled water with a glass electrode pH meter, and is measured according to the method of JIS K6221-1982. If the pH of the raw material carbon black is less than the above lower limit, the overall balance is lost and the dispersion stability is deteriorated, and if it exceeds the upper limit, film peeling tends to occur.
- the raw material carbon black having an ash content of 1.0% or less and a specific surface area of 20 to 300 m 2 / g is preferably used.
- Ash is measured according to the method described in JISK6218-2, and the specific surface area is measured according to method C described in JISK6217-2. If the ash content exceeds the above upper limit, the resistance value decreases, which is not preferable, and if the specific surface area is less than the lower limit, black matrix shape defects are likely to occur, and if the upper limit is exceeded, dispersants, resins, dyes, etc. Since a large amount is required, neither is preferable.
- the raw material carbon black is preferably oxidized in advance and has at least one acidic functional group on the surface, and two or more types of acidic functional groups are applied on the surface after a plurality of types of oxidation treatment. It is more preferable to have a group. Those that have not been oxidized beforehand do not have acidic functional groups on the surface or the number of acidic functional groups is insufficient, so it is sufficient to uniformly and finely disperse carbon black in the photosensitive resin composition However, the resistance value of the obtained black matrix is lowered. For this reason, it is not preferable because electrical conduction is likely to occur between the transparent electrode on the color filter and the black matrix or between the counter electrodes, thereby causing an image defect.
- oxidizing agents such as ozone gas, nitric acid, sodium hypochlorite, hydrogen peroxide, nitrogen monoxide gas, nitrogen dioxide gas, sulfuric anhydride, fluorine gas, concentrated sulfuric acid, nitric acid, various peroxides, etc. are used.
- a method is mentioned.
- the acidic functional group include a hydroxyl group, an oxo group, a hydroperoxy group, a carbonyl group, a carboxyl group, a peroxycarboxylic acid group, an aldehyde group, a ketone group, a nitro group, a nitroso group, an amide group, an imide group, and a sulfonic acid group.
- the dye used in the dye-coated carbon black of the present invention is not particularly limited as long as it can be adsorbed on the surface of the carbon black.
- Known basic dyes, acid dyes, direct dyes, reactive dyes since the sulfone group and the carboxyl group interact with the functional group on the carbon black, the amino group reacts with the alkali-soluble resin, and it can be insolubilized with a sulfuric acid band.
- An ionic or nonionic dye can be more suitably used.
- a dark dye having a high light absorption property close to black it is preferable to use a dark dye having a high light absorption property close to black. Specific examples of such dyes include food color dyes such as Food Black No.
- Drimarene Brilliant Red X-2B Reactive Red 56
- Levafix Brilliant Red E-4B Levafix Brilliant Red F-6BA
- similar Reactive dyes such as Levafix® dyes Dystar (L. P.
- the content of the dye in the dye-coated carbon black used in the present invention is preferably 0.5 to 10% by mass, more preferably 1 to 7% by mass, and particularly preferably 1 to 5% by mass. If the content of the dye is less than the above lower limit, the coating is insufficient and a high resistance value cannot be obtained, and if the upper limit is exceeded, excess dye that is not coated tends to inhibit dispersibility and cause thickening and aggregation. Neither is preferred.
- the dye-coated carbon black used in the present invention is raked with a metal or a metal salt.
- the dye is fixed to the surface of the carbon black or the acidic functional group via a metal or metal salt, and the dye is difficult to be detached from the surface of the carbon black, so that the dye is difficult to elute and has high shielding properties. Can be maintained.
- the metal or metal salt used for rake formation include aluminum, magnesium, calcium, strontium, barium or manganese alone or their hydrochlorides and sulfates, and these may be used alone or in combination of two or more. Can be used.
- the addition amount of the metal or metal salt used for rake formation is preferably 0.3 times mol or more, more preferably 0.5 times mol or more, and particularly preferably 0.8 times mol or more with respect to the dye. If the addition amount of the metal or metal salt is less than the above, the dye is not sufficiently fixed, and the dye is liable to be detached from the surface of the carbon black.
- carbon black as a raw material is mixed with water (adjusted by mixing ion-exchanged water with tap water so that the electrical conductivity is constant, the same applies hereinafter) to form a slurry, heated and stirred for a predetermined time, and then carbon black After washing, cool and wash again with water.
- water is added to the obtained carbon black to form a slurry again, and the above-described oxidizing agent is added and stirred at a predetermined temperature for a predetermined time to oxidize the surface of the carbon black and rinse with water.
- the oxidation treatment is carried out by changing the type of the oxidizing agent a plurality of times as necessary.
- the obtained oxidized carbon black was mixed with water to form a slurry again, and a dye was added so as to have the predetermined content with respect to the target dye-coated carbon black, and 1 to 5 at 40 to 90 ° C. Stir for a period of time to adsorb and coat the dye on the carbon black surface. Furthermore, equimolar amount of the above-mentioned metal or metal salt is added to the added dye and stirred at 30 to 70 ° C. for 1 to 5 hours to rake the dye with the metal or metal salt to fix the dye on the surface of carbon black. Let And after cooling this, washing with water, filtering and drying, the target dye-coated carbon black can be obtained.
- the blending amount of the dye-coated carbon black in the pigment dispersion (A) of the present invention is 15 to 35% by mass, preferably 20 to 30% by mass.
- the blending amount of the dye-coated carbon black is less than the lower limit, the light shielding property is not sufficient, and in order to obtain a desired contrast, the film thickness must be increased, and the surface smoothness of the black matrix is difficult to obtain.
- the amount of the dye-coated carbon black exceeds the above upper limit, the dispersion stability of the pigment dispersion is lowered, and the content of the photosensitive resin as the original binder is also reduced, so that good development characteristics are obtained. Neither is preferred since it cannot be obtained.
- the (A) pigment dispersion of the present invention may contain carbon black subjected to normal or predetermined treatment in addition to the dye-coated carbon black.
- other pigments, light shielding materials, and the like may be included.
- Other pigments include, for example, black organic pigments such as perylene black and cyanine black, and a mixed color obtained by mixing at least two kinds of pigments selected from red, blue, green, purple, yellow, cyan, magenta, etc. into a pseudo black color Organic pigments can be used.
- Examples of other light shielding materials include chromium oxide, iron oxide, titanium black, aniline black, and cyanine black. Two or more pigments and light shielding materials other than the dye-coated carbon black can be appropriately selected and used, or they may be used in combination.
- the dispersant of the component (A2) of the present invention may be any as long as it has a function of stably dispersing the pigment-dispersed carbon black of component (A1) or other pigments included in some cases as a pigment dispersion.
- known dispersants such as various polymer dispersants can be used.
- Specific examples of the polymer dispersant include polymer dispersants having basic functional groups such as primary, secondary or tertiary amino groups, nitrogen-containing heterocycles such as pyridine, pyrimidine and pyrazine.
- the amount of component (A2) is 1 to 30% by mass, preferably 2 to 25% by mass, based on the dye-treated CB.
- the unsaturated group-containing alkali-soluble resin of the component (A3) of the present invention has the following general formula (I): [Wherein R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen atom or a phenyl group, and R 5 represents a hydrogen atom or a methyl group.
- A represents —CO—, —SO 2 —, —C (CF 3 ) 2 —, —Si (CH 3 ) 2 —, —CH 2 —, —C (CH 3 ) 2 —, —O—.
- X represents a tetravalent carboxylic acid residue
- Y 1 and Y 2 each independently represents a hydrogen atom or —OC—Z— (COOH) m (wherein , Z represents a divalent or trivalent carboxylic acid residue, m represents a number of 1 to 2, and n represents an integer of 1 to 20]. is there.
- the epoxy (meth) acrylate adduct of the general formula (I) used in the present invention is a reaction product of an epoxy compound having two glycidyl ether groups derived from bisphenols and (meth) acrylic acid. It is obtained by reacting dicarboxylic acid or tricarboxylic acid or any acid monoanhydride with tetracarboxylic acid or acid dianhydride.
- bisphenols that give the epoxy (meth) acrylate adduct of the general formula (I) of the present invention include bis (4-hydroxyphenyl) ketone and bis (4-hydroxy-3,5-dimethylphenyl) ketone.
- l usually has an average value of 0 to 10 (not necessarily an integer) because a plurality of values coexist, but a preferable average value of l is 0 to 3. If the value of l exceeds the upper limit, when the resin composition is a compound of the general formula (I), the viscosity of the composition becomes too high and the coating cannot be performed well, or the alkali solubility cannot be sufficiently imparted. The developability is very poor.
- the compound of the general formula (II) is reacted with acrylic acid or methacrylic acid or both, and the resulting reaction product having a hydroxy group is converted to a polybasic acid dicarboxylic acid (or tricarboxylic acid) and tetracarboxylic acid. At least one of each acid is reacted to obtain an epoxy (meth) acrylate acid adduct (I). Since this epoxy (meth) acrylate acid adduct (I) has both an ethylenically unsaturated double bond and a carboxyl group, it has excellent photocurability, good developability, and patterning characteristics as an alkali development type photosensitive resin composition. And a good black matrix can be obtained.
- the dicarboxylic acids used in the epoxy (meth) acrylate acid adduct of the general formula (I) of the present invention include chain hydrocarbon dicarboxylic acid or acid anhydride thereof, alicyclic dicarboxylic acid or acid anhydride thereof, aromatic Group dicarboxylic acids and acid anhydrides thereof are used.
- chain hydrocarbon dicarboxylic acid or an acid anhydride thereof for example, succinic acid, acetyl succinic acid, maleic acid, adipic acid, itaconic acid, azelaic acid, citramalic acid, malonic acid, glutaric acid, citric acid,
- succinic acid for example, succinic acid, acetyl succinic acid, maleic acid, adipic acid, itaconic acid, azelaic acid, citramalic acid, malonic acid, glutaric acid, citric acid
- succinic acid acetyl succinic acid
- maleic acid adipic acid
- itaconic acid azelaic acid
- citramalic acid malonic acid
- glutaric acid citric acid
- dicarboxylic acids having an arbitrary substituent introduced therein or acid anhydrides thereof may be used.
- Examples of the alicyclic dicarboxylic acid or its acid anhydride include compounds such as hexahydrophthalic acid, cyclobutane dicarboxylic acid, cyclopentane dicarboxylic acid, norbornane dicarboxylic acid, and any substituents introduced. Dicarboxylic acids or acid anhydrides thereof may be used.
- examples of the aromatic dicarboxylic acid and its acid anhydride include compounds such as phthalic acid and isophthalic acid, and further dicarboxylic acids into which an arbitrary substituent is introduced or acid anhydrides thereof may be used. Further, tricarboxylic acids may be used in place of the dicarboxylic acids, but examples thereof include trimellitic acid or acid monoanhydride thereof.
- tetracarboxylic acid utilized for the epoxy (meth) acrylate acid adduct of general formula (I) of the present invention chain hydrocarbon tetracarboxylic acid or its acid dianhydride, alicyclic tetracarboxylic acid or The acid dianhydride or aromatic polycarboxylic acid or acid dianhydride is used.
- examples of the chain hydrocarbon tetracarboxylic acid or its acid dianhydride include butanetetracarboxylic acid, pentanetetracarboxylic acid, hexanetetracarboxylic acid and the like, and further tetracarboxylic acids into which substituents are introduced. Or its acid dianhydride may be sufficient.
- Examples of the alicyclic tetracarboxylic acid or its acid dianhydride include cyclobutanetetracarboxylic acid, cyclopentanetetracarboxylic acid, cyclohexanetetracarboxylic acid, cycloheptanetetracarboxylic acid norbornanetetracarboxylic acid, and the like. May be a tetracarboxylic acid having an introduced substituent or an acid dianhydride thereof.
- examples of the aromatic tetracarboxylic acid and its acid dianhydride include pyromellitic acid, benzophenone tetracarboxylic acid, biphenyl tetracarboxylic acid, biphenyl ether tetracarboxylic acid, and acid dianhydrides thereof, and further substitution It may be a tetracarboxylic acid having an introduced group or an acid dianhydride thereof.
- the use ratio of (a) dicarboxylic acids and (b) tetracarboxylic acids used in the epoxy (meth) acrylate acid adduct of the general formula (I) of the present invention is such that the molar ratio of (a) and (b) is The range is 1:10 to 10: 1, preferably 1: 5 to 1: 1. If the use ratio of dicarboxylic acids and tetracarboxylic acids in the epoxy (meth) acrylate adduct of the general formula (I) deviates from the above range, the optimum molecular weight cannot be obtained, and alkali developability, light transmission, heat resistance, resistance Since solvent property, pattern shape, etc. deteriorate, it is not preferable. In addition, there exists a tendency for alkali solubility to become large and molecular weight to become large, so that the usage-amount of tetracarboxylic acid is large.
- the epoxy (meth) acrylate acid adduct of the general formula (I) used in the present invention preferably has a weight average molecular weight (Mw) of 2000 to 10,000, and of 3000 to 7000. Is particularly preferred. If the weight average molecular weight (Mw) is less than 2000, the adhesion of the pattern during development cannot be maintained and pattern peeling occurs. If the weight average molecular weight (Mw) exceeds 10,000, the adhesion to the glass substrate is high. As a result, the residue and the remaining film of the pattern portion are likely to remain. Further, the epoxy (meth) acrylate acid adduct of the general formula (I) desirably has an acid value in the range of 30 to 200 KOHmg / g.
- this value is less than 30 KOHmg / g, alkali development cannot be performed well, or special development conditions such as strong alkali are required, and if it exceeds 200 KOHmg / g, the permeation of the alkali developer is accelerated and peeling development occurs. Is also not preferred.
- the epoxy (meth) acrylate acid adduct of the general formula (I) used in the present invention can be produced by a known method, for example, the method described in Patent Document 1, by the above-described steps.
- a method of reacting an unsaturated group-containing monocarboxylic acid with an epoxy compound of the general formula (II) for example, an epoxy group of an epoxy compound and an equimolar amount of an unsaturated group-containing monocarboxylic acid are added to a solvent,
- a catalyst triethylbenzylammonium chloride, 2,6-diisobutylphenol, etc.
- an acid anhydride with a hydroxyl group of an epoxy acrylate compound as a reaction product a predetermined amount of an epoxy acrylate compound, an acid dianhydride, and an acid monoanhydride is added to a solvent, and a catalyst (odor In the presence of tetraethylammonium bromide, triphenylphosphine, etc.), the reaction is carried out by heating and stirring at 90 to 130 ° C.
- the blending amount of the above-mentioned epoxy (meth) acrylate acid adduct [(A3) component] in the (A) pigment dispersion of the present invention is 2 to 20% by mass, preferably 5 to 15% by mass. If the blending amount of the epoxy (meth) acrylate acid adduct is less than the above lower limit, the stability of the mill base is deteriorated and the resistance value is lowered, which is not preferable. If the upper limit is exceeded, the viscosity of the mill base is increased and the coating property is poor and smooth. This is not preferable because the properties are lowered.
- Examples of the (A4) solvent of the present invention include alcohols such as methanol, ethanol, n-propanol, isopropanol, ethylene glycol and propylene glycol, terpenes such as ⁇ - or ⁇ -terpineol, acetone, methyl ethyl ketone, cyclohexanone, N- Ketones such as methyl-2-pyrrolidone, aromatic hydrocarbons such as toluene, xylene, tetramethylbenzene, cellosolve, methyl cellosolve, ethyl cellosolve, carbitol, methyl carbitol, ethyl carbitol, butyl carbitol, propylene glycol Monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, triethylene glycol monomethyl ether , Glycol ethers such as tri
- the pigment dispersion (A) of the present invention is prepared by adding the epoxy (meth) acrylate acid adduct of the general formula (I) and other components added as necessary to an optimal amount of solvent, mixing and dissolving the dye, Add coated carbon black, add media such as glass beads, zirconia beads, and then disperse paint conditioner, sand grounder, ball mill, roll mill, stone mill, jet mill, homogenizer, ultrasonic, etc. alone or in combination. Can be obtained.
- the dye-coated carbon black is finely divided and stabilized, so that the coating characteristics of the photosensitive resin composition using the pigment dispersion can be improved, the light blocking ability of the black matrix is improved, and the carbon black This is advantageous for increasing the resistance when a light-shielding material having conductivity is used.
- the average secondary particle diameter of the dye-coated carbon black after the dispersion treatment of the pigment dispersion is preferably adjusted to 50 to 200 nm, preferably 80 to 150 nm.
- the average secondary particle size here is, for example, a value of an average particle size obtained by a known laser Doppler type particle size measuring device.
- the viscosity of (A) the pigment dispersion is 3.0 to 100.0 mPa ⁇ s, preferably 3.0 at a liquid temperature of 25 ° C. of the (A) pigment dispersion, as determined from a known cone plate viscometer. It is preferable to adjust to ⁇ 20.0 mPa ⁇ s.
- the (B) unsaturated group-containing alkali-soluble resin it is more preferable to use the epoxy (meth) acrylate acid adduct of the general formula (I) as the component (A3).
- a compound having two or more glycidyl ether groups such as a phenol novolak type epoxy compound or a cresol novolak type epoxy compound is used instead of an epoxy compound derived from bisphenol, and is a photosensitive group.
- An unsaturated group-containing alkali-soluble resin derivatized into a compound having an unsaturated double bond and an acidic functional group such as a carboxyl group that brings about alkali solubility can be used.
- (B) Unsaturated group containing alkali-soluble resin may be used independently, and 2 or more types may be mixed and used for it.
- the photosensitive resin composition having high light-shielding and high resistance it is preferable to use the same components as the (A) pigment dispersion co-dispersion resin (A3).
- Examples of the photopolymerizable monomer (C) having an ethylenically unsaturated bond include hydroxyl groups such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.
- (Meth) acrylic acid esters ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, tetramethylene glycol di (meth) Acrylate, trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythris Ritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, glycerol (meth) acrylate, sorbitol penta (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (me
- the photopolymerizable monomer having an ethylenically unsaturated bond is preferably one having three or more photopolymerizable groups and capable of crosslinking the unsaturated group-containing alkali-soluble resin molecules.
- the photopolymerizable monomer which has the ethylenically unsaturated bond of (C) component does not have a free carboxy group.
- the blending ratio of the unsaturated group-containing resin ((A3) + (B)) component and (C) component is a mass ratio.
- ((A3) + (B)): (C) is preferably 20:80 to 90:10, and preferably 40:60 to 80:20.
- the amount is large, the proportion of the photoreactive functional group in the resin is small and the formation of the crosslinked structure is insufficient, and the acid value in the resin component is too high, so that the solubility in the alkaline developer in the exposed area becomes high. For this reason, there is a possibility that the formed pattern is narrower than the target line width or that the pattern is easily lost.
- One or more initiators can be used as the photopolymerization initiator of the (D) component.
- the photoinitiator said by this invention is used by the meaning containing a sensitizer.
- Examples of usable photopolymerization initiators include acetophenones such as acetophenone, 2,2-diethoxyacetophenone, p-dimethylacetophenone, p-dimethylaminopropiophenone, dichloroacetophenone, trichloroacetophenone, and p-tert-butylacetophenone.
- acetophenones such as acetophenone, 2,2-diethoxyacetophenone, p-dimethylacetophenone, p-dimethylaminopropiophenone, dichloroacetophenone, trichloroacetophenone, and p-tert-butylacetophenone.
- Benzophenones such as benzophenone, 2-chlorobenzophenone, p, p'-bisdimethylaminobenzophenone, benzoin ethers such as benzyl, benzoin, benzoin methyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2- (o-chlorophenyl) ) -4,5-phenylbiimidazole, 2- (o-chlorophenyl) -4,5-di (m-methoxyphenyl) biimidazole, 2- (o-fluorophenyl) -4,5-diphenylbiimidazole, 2 -(o-methoxypheny ) -4,5-diphenylbiimidazole, biimidazole compounds such as 2,4,5-triarylbiimidazole, 2-trichloromethyl-5-styryl-1,3,4-oxadiazole, 2-trichloro Halomethyl
- the amount of the photopolymerization initiator used as the component (D) is 2 to 4 based on a total of 100 parts by mass of each of the unsaturated group-containing alkali-soluble resin (A3) and (B) and the photopolymerizable monomer (C).
- the amount is preferably 60 parts by mass, and preferably 10 to 50 parts by mass.
- any of the solvents exemplified as the (A4) component can be suitably used, and at least the same solvent as the (A4) component should be included. Two or more kinds of solvents can also be used.
- the photosensitive resin composition for black matrix of the present invention comprises the above (A) pigment dispersion, (B) an unsaturated group-containing alkali-soluble resin, (C) a photopolymerizable monomer having an ethylenically unsaturated bond, (D ) Photopolymerization initiator and (E) Solvent as essential components, but separate from curing accelerator, thermal polymerization inhibitor, plasticizer, filler, leveling agent, antifoaming agent and dispersant as required Additives such as surfactants can be blended.
- thermal polymerization inhibitor examples include hydroquinone, hydroquinone monomethyl ether, pyrogallol, tert-butylcatechol, phenothiazine and the like
- plasticizer examples include dibutyl phthalate, dioctyl phthalate, tricresyl phosphate and the like.
- the material examples include glass fiber, silica, mica, and alumina.
- the antifoaming agent and leveling agent include silicon-based, fluorine-based, and acrylic-based compounds.
- the photosensitive resin composition of the present invention contains the above components (A) to (E) as main components, but in the solid content including monomers and the like that become solid content after curing excluding the solvent, It is desirable that the total amount of components (D) excluding the solvent is 70% by mass or more, preferably 80% by mass, more preferably 90% by mass or more.
- the amount of the solvent varies depending on the target viscosity, but is preferably in the range of 20 to 90% by mass.
- the solid content can be measured by heating the solution of the photosensitive resin composition at 160 ° C. for 2 hours to remove the solvent.
- the content of the ⁇ (A1) component dye-coated carbon black is preferably blended so as to be 40% by mass or more in the solid content of the photosensitive resin composition.
- the range is preferably 45 to 60% by mass, more preferably 50 to 55% by mass.
- the content of the component (A1) is low, the light shielding property is not sufficient, and in order to obtain a desired contrast, the film thickness must be increased, and the surface smoothness of the black matrix is difficult to obtain.
- the content of the component (A1) is high, not only the pigment dispersion of the component (A) but also the dispersion stability of the photosensitive resin composition is lowered, and the content of the photosensitive resin as a binder is also reduced. There is a possibility that it may be undesirable that the development adhesion and the adhesion to the glass substrate cannot be sufficiently provided, or the alkali solubility is insufficient and the favorable development characteristics cannot be obtained.
- the coating film of the present invention is obtained, for example, by applying a solution of the photosensitive resin composition for black resist to a substrate or the like, drying, irradiating light (including ultraviolet rays, radiation, etc.) and curing it. can get.
- a coating film having a desired pattern can be obtained by providing a portion that is exposed to light and a portion not exposed to light, curing only the portion that is exposed to light, and dissolving the other portion with an alkaline solution.
- a method for producing a color filter using the photosensitive resin composition for black resist of the present invention will be described.
- a photosensitive resin composition for black resist is applied to the substrate, and a light-shielding layer (black matrix) is formed so as to partition a portion where pixels are formed.
- pre-baking is performed to evaporate the solvent, thereby forming a coating film.
- development using an alkaline developer is performed to dissolve and remove the unexposed portion of the coating film, and then post-baking to form a predetermined red pixel pattern.
- a pixel array arranged in an array is formed. Thereafter, using the ink in which the green or blue pigment is dispersed, the liquid composition is applied, pre-baked, exposed, developed, and post-baked in the same manner as the red pixel array.
- the liquid composition is applied, pre-baked, exposed, developed, and post-baked in the same manner as the red pixel array.
- the film is formed by removing the solvent (pre-baking).
- pre-baking is performed by heating with an oven, a hot plate or the like, vacuum drying, or a combination thereof.
- the heating temperature and heating time in the pre-baking are appropriately selected according to the solvent used, and for example, the heating is performed at a temperature of 80 to 120 ° C. for 1 to 10 minutes.
- the radiation used for exposing and curing the photosensitive resin composition when producing the color filter for example, visible light, ultraviolet light, far ultraviolet light, electron beam, X-ray, etc. can be used. Radiation with a wavelength in the range of 250 to 450 nm is preferred.
- the developer suitable for alkali development include aqueous solutions of alkali metal and alkaline earth metal carbonates, aqueous solutions of alkali metal hydroxides, and the like. It is good to develop at a temperature of 20 to 30 ° C. using a weak alkaline aqueous solution containing 0.05 to 10% by mass of carbonate such as sodium carbonate, potassium carbonate or lithium carbonate. Etc.
- a development processing method a shower development method, a spray development method, a dip (immersion) development method, a paddle (liquid accumulation) development method, or the like can be applied.
- the development conditions are preferably 10 to 120 seconds at room temperature.
- a heat treatment (post-bake) is performed at a temperature of 180 to 250 ° C. and a condition of 20 to 100 minutes. This post-baking is performed for the purpose of improving the adhesion between the patterned coating film and the substrate. This is performed by heating with an oven, a hot plate or the like, as in the pre-baking.
- the patterned coating film of this invention is formed through each process by the above photolithography method.
- a transparent electrode such as ITO or gold on glass or a transparent film (for example, polycarbonate, polyethylene terephthalate, polyether sulfone, etc.) is used.
- a vapor-deposited or patterned material is used.
- these substrates may be subjected to appropriate pretreatment such as chemical treatment with a silane coupling agent or the like, plasma treatment, ion plating, sputtering, gas phase reaction method, vacuum deposition, etc., if desired.
- Preparation Example 1 ⁇ Preparation of dye-coated carbon black (1)> 10 g of slurry was prepared by mixing 1000 g of carbon black (TPX-1099: manufactured by Cabot) with water, stirred at 95 ° C. for 1 hour, allowed to cool, and then washed with water. This was again mixed with water to prepare 10 L of slurry, 42.9 g of 70% nitric acid was added, and the mixture was stirred at 40 ° C. for 4 hours. This was allowed to cool and washed with water, and then mixed with water again to prepare 10 L of slurry, and 769.2 g of 13% sodium hypochlorite aqueous solution was added and stirred at 40 ° C. for 6 hours.
- carbon black TPX-1099: manufactured by Cabot
- the acidic functional group amount (carboxyl group amount) of the obtained dye-coated carbon black was measured as follows according to the method described in JP-A-2000-248197.
- the water separated from the carbon black was removed by decantation, and then kneaded for about 5 minutes with a roll mill having two rolls heated to 80 to 120 ° C. to obtain a resin composition.
- the resin composition is cut into a sheet shape with a heated roll, passed through a roll mill having two rolls at room temperature, pulverized to a size of about 30 mm or less, transferred to water, and at a speed of about 3000 rpm.
- the mixture was agitated for about 3 minutes and pulverized and sized so that the average secondary particle size became 0.1 to 3 mm, thereby obtaining a sized product.
- This sized product was dried at 80 to 150 ° C. to obtain a resin-coated carbon black.
- Example 1 ⁇ Preparation of photosensitive resin composition for black matrix> Pigment dispersion (A) -1 obtained in Preparation Example 4 (565 g), (B) -1 43.7 g, (C) 25 g, (D) 15 g and silane coupling agent (F) 2.5 g, surfactant A photosensitive resin composition for black matrix was prepared by uniformly mixing 2.0 g of (G) with 537.9 g of solvent (E) -1 and 752.0 g of (E) -2. This blending component and blending components of the following comparative examples are shown in Table 1.
- Comparative Example 1 A comparative black matrix photosensitive resin composition was prepared in substantially the same manner as in Example 1 except that (A) -2 was used instead of pigment dispersion (A) -1.
- Example 2 Except for using (A) -3 instead of pigment dispersion (A) -1, it was almost the same as in Example 1 (however, the blending components were as shown in Table 1), and a comparative black matrix photosensitive material was used. A functional resin composition was prepared.
- a photomask was applied to the photosensitive portion to irradiate 80 mJ / cm 2 of ultraviolet light with an ultra high pressure mercury lamp having an i-line illuminance of 30 mW / cm 2 .
- spray washing with 5 kgf / cm 2 pressure is performed to remove the unexposed portion of the coating film to form a pixel pattern on the glass substrate, and then heat at 230 ° C. for 30 minutes using a hot air dryer.
- the line width, pattern linearity and resolution with respect to the mask width of the 10 ⁇ m line after post-baking were evaluated. Each evaluation method is as follows.
- Pattern line width The pattern line width with a mask width of 10 ⁇ m was measured using a length measuring microscope (“XD-20” manufactured by Nikon Corporation). Pattern linearity: 10 ⁇ m mask pattern after post-baking is observed with a microscope, ⁇ when there is no peeling on the substrate and no pattern edge portion is observed, ⁇ when it is partially recognized, and when it is recognized throughout X was evaluated. Resolution: The minimum pattern size remaining on the substrate among the 2 ⁇ m, 4 ⁇ m, 5 ⁇ m, 6 ⁇ m, 8 ⁇ m, 10 ⁇ m and 20 ⁇ m mask patterns was defined as the resolution.
- Each photosensitive resin composition obtained above was applied on a 125 mm ⁇ 125 mm glass substrate (Corning 1737) using a spin coater so that the film thickness after post-baking was 1.0 ⁇ m, and at 90 ° C. Pre-baked for 1 minute. After that, the exposure gap is adjusted to 100 ⁇ m, a negative photomask with a 15 mm ⁇ 15 mm opening is put on the dried coating film, and an ultraviolet ray of 80 mJ / cm 2 is irradiated with an ultrahigh pressure mercury lamp with an i-line illuminance of 30 mW / cm 2. Irradiated to perform photocuring reaction of the photosensitive part.
- the unexposed part of the coating film is removed to form a pixel pattern on the glass substrate, and then post-baking at 230 ° C. for 30 minutes using a hot air dryer
- the OD of the pixel formed in the 15 mm ⁇ 15 mm opening was evaluated using a Macbeth transmission densitometer.
- Each photosensitive resin composition obtained above was applied on a 125 mm ⁇ 125 mm glass substrate (Corning 1737) using a spin coater so that the film thickness after post-baking was 1.0 ⁇ m, and at 90 ° C. Pre-baked for 1 minute. Thereafter, an ultraviolet ray of 80 mJ / cm 2 was irradiated without an photomask with an ultrahigh pressure mercury lamp having an i-line illuminance of 30 mW / cm 2 to carry out a photocuring reaction. Next, this exposed coated plate is developed in a 0.08% aqueous potassium hydroxide solution at 25 ° C.
- the coated plate and the counter substrate (uncoated substrate) or the uncoated glass substrate for comparison test are supported by two supports so that the overlapping part is centered (2 The length of the support at the point is 3 cm), and the load is applied at a speed of 1 mm / min using Orientec's “UCT-100” from directly above the overlapped portion to observe the peeled surface. And the load at that time were read, divided by the application area of the sealant epoxy adhesive, and the weight per unit area was defined as the adhesion strength.
- the same adhesion strength test was performed to evaluate the adhesion strength before and after PCT.
- the adhesion strength of each composition was shown as a relative value when the adhesion strength between the glasses to which no resist was applied before and after PCT was 100, respectively.
- 70 or more was evaluated as ⁇ , and less than 70 was evaluated as ⁇ .
- the photosensitive resin composition for black matrix of Example 1 of the present invention has pattern line width, pattern linearity and resolution development characteristics as compared with the photosensitive resin composition of each comparative example.
- the surface resistance and adhesion strength with the glass substrate were also excellent.
- the dye-uncoated carbon black was used as in Comparative Example 1
- development characteristics such as pattern linearity and resolution were not a problem, but necessary characteristics were not obtained in the adhesion between the surface resistance and the glass substrate.
- resin-coated carbon black was used as in Comparative Example 2
- the development characteristics and the adhesion strength with the glass substrate were not sufficient when the conditions for the light shielding degree and the surface resistance were satisfied.
- the carbon black dispersion for black matrix of the present invention when used for the photosensitive resin composition for black matrix, it is possible to form a fine line pattern with high resistance and excellent development characteristics and adhesion to a glass substrate.
- a color filter When this is applied to a color filter, it is possible to produce a highly reliable black matrix with high light shielding properties and high resistance. Therefore, it is used for various multi-color displays such as color liquid crystal display devices, color facsimiles, image sensors, etc., inks used in optical equipment, etc., color filters having a black matrix, and displays for televisions, video monitors or computers. This is extremely useful. In particular, it is useful for small and medium-sized high-definition displays for smartphones.
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Abstract
Description
(1)本発明は、下記(A1)~(A4)成分、
(A1)表面が染料で被覆されてなる染料被覆カーボンブラック、
(A2)分散剤、
(A3)下記一般式(I)の構造を有する不飽和基含有アルカリ可溶性樹脂、
(A4)溶剤
を有する(A)顔料分散体をあらかじめ調製したのち、必須成分として下記(B)~(E)成分、
(B)不飽和基含有アルカリ可溶性樹脂、
(C)エチレン性不飽和結合を有する光重合性モノマー、
(D)光重合開始剤、
(E)溶剤
を含む配合成分と、前記(A)顔料分散体とを混合することを特徴とするカラーフィルターブラックマトリックス用感光性樹脂組成物の製造方法である。
〔一般式(I)は、ビスフェノール類から誘導される2個のグリシジルエーテル基を有するエポキシ化合物と(メタ)アクリル酸との反応物に、(a)ジカルボン酸若しくはトリカルボン酸又はいずれかの酸一無水物と(b)テトラカルボン酸又はその酸二無水物とを、(a)と(b)のモル比が1:10~10:1となるよう反応させて得られるエポキシ(メタ)アクリレート酸付加物である。ここで、式中、R1、R2、R3及びR4は、それぞれ独立して水素原子、炭素数1~5のアルキル基、ハロゲン原子又はフェニル基を表し、R5は、水素原子又はメチル基を表し、Aは、-CO-、-SO2-、-C(CF3)2-、-Si(CH3)2-、-CH2-、-C(CH3)2-、-O-、9,9-フルオレニル基又は直結合を表し、Xは4価のカルボン酸残基を表し、Y1及びY2は、それぞれ独立して水素原子又は-OC-Z-(COOH)m(但し、Zは2価又は3価カルボン酸残基を表し、mは1~2の数を表す)を表し、nは1~20の整数を表す。〕
(A1)表面が染料で被覆されてなる染料被覆カーボンブラック、
(A2)分散剤、
(A3)下記一般式(I)の構造を有する不飽和基含有アルカリ可溶性樹脂、
(A4)溶剤
を有してあらかじめ調製された(A)顔料分散体と、必須成分として下記(B)~(E)成分、
(B)不飽和基含有アルカリ可溶性樹脂、
(C)エチレン性不飽和結合を有する光重合性モノマー、
(D)光重合開始剤、
(E)溶剤
を含む配合成分とが混合されてなることを特徴とするカラーフィルターブラックマトリックス用感光性樹脂組成物である。
〔一般式(I)は、ビスフェノール類から誘導される2個のグリシジルエーテル基を有するエポキシ化合物と(メタ)アクリル酸との反応物に、(a)ジカルボン酸若しくはトリカルボン酸又はいずれかの酸一無水物と(b)テトラカルボン酸又はその酸二無水物とを、(a)と(b)のモル比が1:10~10:1となるよう反応させて得られるエポキシ(メタ)アクリレート酸付加物である。ここで、式中、R1、R2、R3及びR4は、それぞれ独立して水素原子、炭素数1~5のアルキル基、ハロゲン原子又はフェニル基を表し、R5は、水素原子又はメチル基を表し、Aは、-CO-、-SO2-、-C(CF3)2-、-Si(CH3)2-、-CH2-、-C(CH3)2-、-O-、9,9-フルオレニル基又は直結合を表し、Xは4価のカルボン酸残基を表し、Y1及びY2は、それぞれ独立して水素原子又は-OC-Z-(COOH)m(但し、Zは2価又は3価カルボン酸残基を表し、mは1~2の数を表す)を表し、nは1~20の整数を表す。〕
本発明のブラックマトリックス用感光性樹脂組成物は、まず(A)顔料分散体を調製するが、その構成成分は、(A1)染料被覆カーボンブラック、(A2)分散剤、(A3)一般式(I)の構造を有する不飽和基含有アルカリ可溶性樹脂、及び(A4)溶剤である。
〔式中、R1、R2、R3及びR4は、それぞれ独立して水素原子、炭素数1~5のアルキル基、ハロゲン原子又はフェニル基を表し、R5は、水素原子又はメチル基を表し、Aは、-CO-、-SO2-、-C(CF3)2-、-Si(CH3)2-、-CH2-、-C(CH3)2-、-O-、9,9-フルオレニル基又は直結合を表し、Xは4価のカルボン酸残基を表し、Y1及びY2は、それぞれ独立して水素原子又は-OC-Z-(COOH)m(但し、Zは2価又は3価カルボン酸残基を表し、mは1~2の数を表す)を表し、nは1~20の整数を表す〕で示されるエポキシ(メタ)アクリレート酸付加物である。
<染料被覆カーボンブラックの調製(1)>
カーボンブラック(TPX-1099:Cabot社製)1000gを水と混合してスラリー10Lを調製し、95℃で1時間撹拌させ放冷した後水洗した。これを再び水と混合処理してスラリー10Lを調製し、70%の硝酸42.9gを添加して40℃で4時間撹拌した。これを放冷して水洗した後再び水と混合してスラリー10Lを調製し、13%の次亜塩素酸ナトリウム水溶液769.2gを添加して40℃で6時間撹拌した。これを放冷して水洗した後再び水と混合してスラリー10Lを調製し、純度38.4%の染料(Direct Deep BLACK)38.1gを添加して40℃で1時間撹拌し、その後更に硫酸アルミニウム10.1gを添加して40℃で1時間撹拌した。これを放冷した後水洗し、ろ過乾燥させて、染料被覆カーボンブラックを得た。
得られた染料被覆カーボンブラックの酸性官能基量(カルボキシル基量)を、特開2000-248197号公報に記載の方法に従って、以下のとおり測定した。
カルボキシル基量=(50/20×0.01×(滴定量-空滴定量))/カーボンブラック試料質量
得られた染料被覆カーボンブラックのカルボキシル基量は、53.9mmol/gであった。
<染料未被覆カーボンブラックの調製>
染料被覆及び硫酸アルミニウムによるレーキ処理を施さなかった以外は調製例1とほぼ同様に処理して、染料未被覆カーボンブラックを得た。
<樹脂被覆カーボンブラックの調製>
ポリ塩化ビニル(日産化学(株)製ニッサンビニルE-430)にシクロヘキサノンを添加し、約90℃に加熱して溶解させ、ポリ塩化ビニルを10質量%含有したシクロヘキサノン溶液を調製した。一方、カーボンブラック(ファーネスブラック、三菱化学(株)製#3050)と水とを混合して強力に撹拌し、カーボンブラックを6質量%含有した均一な懸濁液を調製した。次に、前記シクロヘキサノン溶液に懸濁液を撹拌しながら添加し、水相のカーボンブラックを溶剤相に移行させた。次いで、カーボンブラックと分離した水を、デカンテーションによって除去したのち、80~120℃に加熱した2本のロールを有するロールミルで約5分間混練して樹脂組成物を得た。次に、樹脂組成物を加熱ロールによりシート状に切出し、これを常温の2本のロールを有するロールミルに通し、約30mm以下の大きさにまで粉砕したのち、水中に移し、約3000rpmの速度で約3分間撹拌して平均二次粒子径が0.1~3mmの粒状物となるように粉砕整粒し、整粒物を得た。この整粒物を80~150℃で乾燥し、樹脂被覆カーボンブラックを得た。
<(A)-1本発明の顔料分散体の調製>
調製例1で得られた染料被覆カーボンブラック(A1成分)600gと、A2成分としてウレタン系分散剤のBYK-167(ビックケミー・ジャパン社製)93.2gと、A3成分としてフルオレン骨格を有するエポキシアクリレート酸付加物のプロピレングリコールモノメチルエーテルアセテート溶液(樹脂固形分濃度=56.5質量%、新日鉄住金化学社製「V259ME」)378gと、A4成分として溶剤プロピレングリコールモノメチルエーテルアセテート1328.8gをビーズミルで分散して本発明の顔料分散体(A)-1を得た。得られた顔料分散体(A)-1の染料被覆カーボンブラックの平均2次粒子径は110nmであった。
<(A)-2比較用顔料分散体(染料未被覆カーボンブラック使用)の調製>
染料被覆カーボンブラックに替えて調製例2で得られた染料未被覆カーボンブラックを用いた以外は調製例4とほぼ同様に処理して、比較用顔料分散体(A)-2を得た。
<(A)-3比較用顔料分散体(樹脂被覆カーボンブラック使用)の調製>
染料被覆カーボンブラックに替えて調製例3で得られた樹脂被覆カーボンブラックを用いた以外は調製例4とほぼ同様に処理して、比較用顔料分散体(A)-3を得た。
<(A)-4比較用顔料分散体(分散樹脂なし)の調製>
フルオレン骨格を有するエポキシアクリレートの酸付加物のプロピレングリコールモノメチルエーテルアセテート溶液を添加せず、溶剤プロピレングリコールモノメチルエーテルアセテート1706.8gとした以外は調製例4とほぼ同様に処理して、比較用顔料分散体(A)-4を得た。
<(B)-1 一般式(I)構造を有する不飽和基含有アルカリ可溶性樹脂>
フルオレン骨格を有するエポキシアクリレートの酸付加物のプロピレングリコールモノメチルエーテルアセテート溶液(樹脂固形分濃度=56.5質量%、新日鉄住金化学社製「V259ME」)
<(B)-2 一般式(I)構造以外の不飽和基含有アルカリ可溶性樹脂>
N-フェニルマレイミド/アクリル酸/スチレン共重合体のプロピレングリコールモノメチルエーテルアセテート溶液(樹脂固形分濃度=35.5質量%、N-フェニルマレイミド:アクリル酸:スチレン=19:22:59モル%、重量平均分子量9000、酸価80)
<(C)エチレン性不飽和結合を有する光重合性モノマー>
ジペンタエリスリトールヘキサアクリレートとジペンタエリスリトールペンタアクリレートとの混合物(日本化薬社製「KAYARAD-DPHA」)
<(D)光重合開始剤>
エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-1-(0-アセチルオキシム)(BASF社製「イルガキュアOXE02」)
<(E)-1 溶剤1>
プロピレングリコールモノメチルエーテルアセテート
<(E)-2 溶剤2>
シクロヘキサノン
<(F)シランカップリング剤>
3-メタクリロキシプロピルトリメトキシシラン(信越化学社製「KBM-503」)
<(G)界面活性剤>
メガファックF475(DIC社製)
<ブラックマトリックス用感光性樹脂組成物の調製>
調製例4で得られた顔料分散体(A)-1 565g、(B)-1 43.7g、(C)25g、(D)15gおよびシランカップリング剤(F)2.5g、界面活性剤(G)2.0gを溶剤(E)-1 537.9g、(E)-2 752.0gに均一に混合し、ブラックマトリックス用感光性樹脂組成物を調製した。この配合成分および以下の比較例の配合成分を表1に示す。
顔料分散体(A)-1の代わりに(A)-2を用いた以外は、実施例1とほぼ同様にして比較用ブラックマトリックス用感光性樹脂組成物を調製した。
顔料分散体(A)-1の代わりに(A)-3を用いた以外は、実施例1とほぼ同様にして(ただし、配合成分は表1に示したとおり)、比較用ブラックマトリックス用感光性樹脂組成物を調製した。
不飽和基含有アルカリ可溶性樹脂(B)-1の代わりに(B)-2を用いた以外は、実施例1とほぼ同様にして(ただし、配合成分は表1に示したとおり)、比較用ブラックマトリックス用感光性樹脂組成物を調製した。
顔料分散体(A)-1の代わりに(A)-4を用いた以外は、実施例1とほぼ同様にして(ただし、配合成分は表1に示したとおり)、比較用ブラックマトリックス用感光性樹脂組成物を調製した。
実施例1および比較例1~4の感光性樹脂組成物を用いて、以下に記す評価を行った。これらの評価結果を表2に示す。
上記で得られた各感光性樹脂組成物を、スピンコーターを用いて125mm×125mmのガラス基板(コーニング1737)上にポストベーク後の膜厚が1.0μmとなるように塗布し、90℃で1分間プリベークした。その後、露光ギャップを100μmに調整し、乾燥塗膜の上に、ライン/スペース=2μm/2μm、4μm/4μm、5μm/5μm、6μm/6μm、8μm/8μm、10μm/10μm及び20μm/20μmのネガ型フォトマスクを被せ、i線照度30mW/cm2の超高圧水銀ランプで80mJ/cm2の紫外線を照射し、感光部分の光硬化反応を行った。
パターン線幅:測長顕微鏡(ニコン社製「XD-20」)を用いてマスク幅10μmのパターン線幅を測定した。
パターン直線性:ポストベーク後の10μmマスクパターンを顕微鏡観察し、基板に対する剥離やパターンエッジ部分のギザツキが認められないものを○、一部に認められるものを△、全体に渡って認められるものを×と評価した。
解像度:2μm、4μm、5μm、6μm、8μm、10μm及び20μmマスクパターンのうち、基板上に残った最小パターンサイズを解像度とした。
上記で得られた各感光性樹脂組成物を、スピンコーターを用いて125mm×125mmのガラス基板(コーニング1737)上にポストベーク後の膜厚が1.0μmとなるように塗布し、90℃で1分間プリベークした。その後、露光ギャップを100μmに調整し、乾燥塗膜の上に、15mm×15mm開口があるネガ型フォトマスクを被せ、i線照度30mW/cm2の超高圧水銀ランプで80mJ/cm2の紫外線を照射し、感光部分の光硬化反応を行った。
上記で得られた各感光性樹脂組成物を、スピンコーターを用いて125mm×125mmのガラス基板(コーニング1737)上にポストベーク後の膜厚が1.0μmとなるように塗布し、90℃で1分間プリベークした。その後、i線照度30mW/cm2の超高圧水銀ランプで80mJ/cm2の紫外線をフォトマスクなしで照射し、光硬化反応を行った。次に、この露光済み塗板を25℃、0.08%水酸化カリウム水溶液中、1kgf/cm2のシャワー現像圧にて、フォトマスクを被せた時にパターンが現れ始める現像時間(ブレイクタイム=BT)から、+20秒の現像後、5kgf/cm2圧のスプレー水洗を行い、熱風乾燥機を用いて230℃、30分間及び180分間熱ポストベークした後、表面抵抗を測定した。
上記で得られた各感光性樹脂組成物を、スピンコーターを用いて125mm×125mmのガラス基板(コーニング1737)上にポストベーク後の膜厚が1.0μmとなるように塗布し、90℃で1分間プリベークした。その後、ネガ型フォトマスクを用いずにi線照度30mW/cm2の超高圧水銀ランプで80mJ/cm2でベタ露光し、熱風乾燥機を用いて230℃、30分間熱ポストベークした。そして、上記で得られたポストベーク基板について、JISK6856-1994の3点折り曲げ密着試験方法に準じた評価法により、以下のようにしてガラス基板との密着強度を評価した。
Claims (15)
- 下記(A1)~(A4)成分、
(A1)表面が染料で被覆されてなる染料被覆カーボンブラック、
(A2)分散剤、
(A3)下記一般式(I)の構造を有する不飽和基含有アルカリ可溶性樹脂、
(A4)溶剤
を有する(A)顔料分散体をあらかじめ調製したのち、必須成分として下記(B)~(E)成分、
(B)不飽和基含有アルカリ可溶性樹脂、
(C)エチレン性不飽和結合を有する光重合性モノマー、
(D)光重合開始剤、
(E)溶剤
を含む配合成分と、前記(A)顔料分散体とを混合することを特徴とするカラーフィルターブラックマトリックス用感光性樹脂組成物の製造方法。
〔一般式(I)は、ビスフェノール類から誘導される2個のグリシジルエーテル基を有するエポキシ化合物と(メタ)アクリル酸との反応物に、(a)ジカルボン酸若しくはトリカルボン酸又はいずれかの酸一無水物と(b)テトラカルボン酸又はその酸二無水物とを、(a)と(b)のモル比が1:10~10:1となるよう反応させて得られるエポキシ(メタ)アクリレート酸付加物である。ここで、式中、R1、R2、R3及びR4は、それぞれ独立して水素原子、炭素数1~5のアルキル基、ハロゲン原子又はフェニル基を表し、R5は、水素原子又はメチル基を表し、Aは、-CO-、-SO2-、-C(CF3)2-、-Si(CH3)2-、-CH2-、-C(CH3)2-、-O-、9,9-フルオレニル基又は直結合を表し、Xは4価のカルボン酸残基を表し、Y1及びY2は、それぞれ独立して水素原子又は-OC-Z-(COOH)m(但し、Zは2価又は3価カルボン酸残基を表し、mは1~2の数を表す)を表し、nは1~20の整数を表す。〕 - 下記(A1)~(A4)成分、
(A1)表面が染料で被覆されてなる染料被覆カーボンブラック、
(A2)分散剤、
(A3)下記一般式(I)の構造を有する不飽和基含有アルカリ可溶性樹脂、
(A4)溶剤
を有してあらかじめ調製された(A)顔料分散体と、必須成分として下記(B)~(E)成分、
(B)不飽和基含有アルカリ可溶性樹脂、
(C)エチレン性不飽和結合を有する光重合性モノマー、
(D)光重合開始剤、
(E)溶剤
を含む配合成分とが混合されてなることを特徴とするカラーフィルターブラックマトリックス用感光性樹脂組成物。
〔一般式(I)は、ビスフェノール類から誘導される2個のグリシジルエーテル基を有するエポキシ化合物と(メタ)アクリル酸との反応物に、(a)ジカルボン酸若しくはトリカルボン酸又はいずれかの酸一無水物と(b)テトラカルボン酸又はその酸二無水物とを、(a)と(b)のモル比が1:10~10:1となるよう反応させて得られるエポキシ(メタ)アクリレート酸付加物である。ここで、式中、R1、R2、R3及びR4は、それぞれ独立して水素原子、炭素数1~5のアルキル基、ハロゲン原子又はフェニル基を表し、R5は、水素原子又はメチル基を表し、Aは、-CO-、-SO2-、-C(CF3)2-、-Si(CH3)2-、-CH2-、-C(CH3)2-、-O-、9,9-フルオレニル基又は直結合を表し、Xは4価のカルボン酸残基を表し、Y1及びY2は、それぞれ独立して水素原子又は-OC-Z-(COOH)m(但し、Zは2価又は3価カルボン酸残基を表し、mは1~2の数を表す)を表し、nは1~20の整数を表す。〕 - (A1)染料被覆カーボンブラックは、染料の含有率が、0.5~10質量%である、請求項2に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 前記染料被覆カーボンブラックは、染料が陰イオン性又は非イオン性の染料である、請求項2又は3に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 前記染料被覆カーボンブラックは、染料が濃色系の染料である、請求項2乃至4の何れか1項に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 前記染料被覆カーボンブラックは、染料が金属又は金属塩によりレーキ化されている、請求項2乃至5の何れか1項に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 前記金属又は金属塩は、アルミニウム、マグネシウム、カルシウム、ストロンチウム、バリウム若しくはマンガン又はこれらの塩である、請求項6に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 前記染料被覆カーボンブラックは、表面に少なくとも1種類の酸性官能基を有するカーボンブラックを用いて得られたものである、請求項2乃至7の何れか1項に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 前記酸性官能基は、水酸基、オキソ基、ヒドロペルオキシ基、カルボニル基、カルボキシル基、ペルオキシカルボン酸基、アルデヒド基、ケトン基、ニトロ基、ニトロソ基、アミド基、イミド基、スルホン酸基、スルフィン酸基、スルフェン酸基、チオカルボン酸基、クロロシル基、クロリル基、ペルクロリル基、ヨードシル基又はヨージル基である、請求項2乃至8の何れか1項に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- (A3)不飽和基含有アルカリ可溶性樹脂の配合量が、2~20質量%である、請求項2乃至9の何れか1項に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- 感光性樹脂組成物の固形分中の(A1)染料被覆カーボンブラックの配合量が、45~60質量%である、請求項2乃至10の何れか1項に記載のカラーフィルターブラックマトリックス用感光性樹脂組成物。
- (B)成分の少なくとも一部が、前記一般式(I)で表される不飽和基含有アルカリ性樹脂である請求項2乃至11のいずれかに記載のカラーフィルター用感光性樹脂組成物。
- 請求項2乃至12記載のカラーフィルターブラックマトリックス用感光性樹脂組成物を硬化させて形成した塗膜。
- 請求項2乃至12記載のブラックマトリックス用感光性樹脂組成物を塗工、製膜後、選択的な位置を光硬化し、アルカリ現像液で現像して得られるブラックマトリックス。
- 請求項14に記載のブラックマトリックスが形成されてなるカラーフィルター。
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CN104145196A (zh) | 2014-11-12 |
KR20140130216A (ko) | 2014-11-07 |
TWI585527B (zh) | 2017-06-01 |
KR102001628B1 (ko) | 2019-07-18 |
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JP6426469B2 (ja) | 2018-11-21 |
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