JPH1069090A - Photosensitive film and production of color filter using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a photosensitive film capable of suppressing a migration of a monomer and a photointiator in the photosensitive resin layer to a cushion layer, less liable to a variation of sensitivity, almost free from ruggedness, capable of producing a high precision pattern with high productivity and fit to produce a color filter and to produce a color filter. SOLUTION: A transparent base film (a), a cushion layer (b) and a colored photosensitive resin layer (c) are successively laminated to obtain the objective photosensitive film. The photosensitive resin layer contains a photopolymerizable compd. having an ethylenic unsatd. group (B) and a photopolymn. initiator (C). The photosensitive film is stuck on a transparent substrate so that the colored photosensitive resin layer (c) comes in contact with the substrate, the transparent base film (a) and the cushion layer (b) are peeled and the colored photosensitive resin layer (c) is patternwise exposed and developed. These processes are repeated to form a multicolored pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a photosensitive film and a method for producing a color filter using the same.

[0002]

2. Description of the Related Art Conventionally, liquid crystal color televisions, computers for liquid crystal color display, and the like have been put into practical use. Are provided, a liquid crystal substance is sealed between them, the liquid crystal substance is oriented by a voltage applied between the electrodes, and a display is performed by the density of the liquid crystal substance. Furthermore, for color display, two or more types of different hues, very fine stripe-like or mosaic-like patterns are spaced at regular intervals on the surface of an optically transparent substrate such as glass, and are parallel or intersecting. Color filters are arranged.

A color filter is usually formed in the order of a transparent substrate, a colored pattern, a protective film, and a transparent electrode. The coloring pattern is composed of an extremely fine stripe or mosaic pattern having two or more different hues. In these patterns, it is necessary to arrange the hues in a predetermined order and at predetermined intervals, and to form uniform layers with little unevenness in thickness. Various color filter manufacturing methods have been proposed. For example, the screen printing method can form a low-cost color filter. In addition, a method using a photolithography technique, that is, a method of irradiating a transparent film formed on a color filter substrate with ultraviolet light through a predetermined negative mask, removing unexposed portions, and dyeing while forming an anti-staining layer. There is.

As an improvement of the above method, a colored solution of the photosensitive resin composition is applied to a substrate, dried,
There is a method of forming a color filter by exposing and developing a pattern of one color, and repeating this process for other colors in the same manner. In addition, multicolor fine stripes or mosaics using a photosensitive film consisting of a transparent support film and a photosensitive resin layer, which are generally used for etching resists, plating resists, solder resists, etc. at the time of manufacturing printed wiring boards. 2. Description of the Related Art A method of manufacturing a color filter that can easily form a pattern with high precision is known. Also, a step of bonding a photosensitive film composed of a support film and a photosensitive resin layer colored in one color on a transparent substrate so that the colored photosensitive resin layer faces the substrate; The step of forming the pattern and the step of peeling and developing the support film are repeated to form a multicolor pattern, thereby producing a color filter.

For example, a photosensitive resin layer containing one hue colorant is applied to a transparent support film and dried, and the photosensitive resin layer of the photosensitive film is transferred onto a transparent substrate, and is transferred through a mask having a predetermined pattern. (Japanese Patent Laid-Open No. 61-99102) is known. A method of forming a pattern by exposing and developing the film through a mask having a predetermined pattern, and then transferring the film onto a transparent substrate to form a color filter pattern (Japanese Patent Application Laid-Open No. 61-99103); This film is heated and pressed on a transparent substrate, exposed through a mask having a predetermined pattern, and the support film is peeled off and developed to form a transparent colored image pattern (Japanese Patent Laid-Open No. 63-1).
87203). Further, a photosensitive film in which an adhesive of a polyvinyl acetate copolymer is formed on a colored photosensitive resin layer is disclosed in JP-A-63-187203.
There is known a method of forming a color filter pattern in the same manner as in Japanese Patent Application Laid-Open No. Hei 2-24624.

However, in a method of manufacturing a color filter using a photosensitive film, the second and subsequent colors of the multicolor are formed by laminating the photosensitive film. There is a problem that a step on the surface occurs. This step may later high resistance by In ₂ O ₃ -SnO ₂ based electrode forming defective by uneven coating and subsequent sputtering made of a transparent resin overcoat layer process problems. In addition, it may directly appear as a rough image. In order to reduce the level difference, a method of providing a thermoplastic resin layer between the colored photosensitive resin layer and the transparent support and flattening it by pressure and temperature during lamination (JP-A-4-208940, JP-A-4-208940, 7-20
No. 309) has been proposed. In this method, since the colored photosensitive resin layer and the cushion layer are in close contact with each other, it is necessary to expose the cushion layer through a mask having a predetermined pattern, resulting in a remarkable lack of resolution. Therefore, a method has been proposed in which the cushion layer is peeled off together with the transparent support film before exposure.

However, this method has a problem that when the transparent support film and the cushion layer are peeled off, the adhesion between the colored photosensitive resin layer and the cushion layer is strong, and the colored photosensitive resin layer does not remain on the transparent substrate. Further, after laminating the cushion layer and the colored photosensitive resin layer, the sensitivity of the colored photosensitive resin layer fluctuates, and there is a problem that productivity is poor in a color filter manufacturing process.

[0008]

According to the first aspect of the present invention, the transfer of the monomer and the photoinitiator in the photosensitive resin layer to the cushion layer can be suppressed, the fluctuation of the sensitivity is small, the step is small, and the precision is high. It is intended to provide a photosensitive film suitable for the production of a color filter capable of producing the pattern with high productivity. The invention according to claim 2 has the effect of the invention according to claim 1, and can suppress the migration of the monomer and the photoinitiator in the photosensitive resin layer to the cushion layer, and the sensitivity film has less fluctuation in sensitivity. Is provided. Claim 3
The invention described provides the effect of the invention described in claim 1 or 2, and further provides a photosensitive film having excellent workability, environmental safety, and the like. The invention according to claim 4 can suppress the migration of the monomer and the photoinitiator in the photosensitive resin layer to the cushion layer, reduce the variation in sensitivity, reduce the level difference, and produce a highly accurate pattern with high productivity. A method for manufacturing a filter is provided.

[0009]

According to the present invention, there is provided a photosensitive film comprising (a) a transparent support film, (b) a cushion layer and (c) a colored photosensitive resin layer which are sequentially laminated. The present invention relates to a photosensitive film containing (B) a photopolymerizable compound having an ethylenically unsaturated group and (C) a photopolymerization initiator in a cushion layer. Also, the present invention
(B) the compounding amount of (B) the photopolymerizable compound having an ethylenically unsaturated group in the cushion layer is 0.3 to 30 parts by weight, with the total amount of the cushion layer being 100 parts by weight;
(C) The photosensitive film, wherein the amount of the photopolymerization initiator is 0.1 to 30 parts by weight, based on 100 parts by weight of the total amount of the cushion layer.

Further, the present invention provides (c) a method in which the colored photosensitive resin layer comprises (A) an organic polymer compound having a carboxyl group, (B) a photopolymerizable compound having an ethylenically unsaturated group, The present invention relates to the photosensitive film containing a photopolymerization initiator and (D) a pigment or a dye. Also, the present invention provides (I) a step of (c) laminating the photosensitive film so that a colored photosensitive resin layer is in contact with a transparent substrate, (II) (a) a transparent support film, and b)
A color characterized by forming a multicolor pattern by repeating a step of peeling the cushion layer and a step of (III) (c) exposing and developing the colored photosensitive resin layer in a pattern. The present invention relates to a method for manufacturing a filter.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The photosensitive film of the present invention comprises
(A) a transparent support film, (b) a cushion layer, and (c) a colored photosensitive resin layer which are sequentially laminated, and (b) an ethylenically unsaturated group in the cushion layer. And (C) a photopolymerization initiator.

As the transparent support film (a) in the present invention, a polyester film having a thickness of about 2 to 100 μm can be used. Specific examples include Tetron film manufactured by Teijin and Mylar film manufactured by DuPont. Examples include a polyester film.

In the present invention, (b) the cushion layer comprises:
It contains (B) a photopolymerizable compound having an ethylenically unsaturated group and (C) a photopolymerization initiator as essential components.

As the photopolymerizable compound (B) having an ethylenically unsaturated group in the present invention, for example, a compound obtained by adding an α, β-unsaturated carboxylic acid to a polyhydric alcohol (trimethylolpropane diacrylate) , Trimethylolpropane dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, tetramethylolmethane triacrylate, tetramethylolmethanetrimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, etc.), and glycidyl group-containing compounds. Compounds obtained by adding an α, β-unsaturated carboxylic acid (trimethylolpropane triglycidyl ether triacrylate, bisphenol A diglycidyl ether diacrylate) Over DOO, bisphenol A diglycidyl ether dimethacrylate), a compound having a hydroxyl group and ethylenically unsaturated group with a polyvalent carboxylic acid (such as phthalic anhydride) (beta-hydroxyethyl acrylate, beta
-Hydroxyethyl methacrylate or the like, an alkyl ester of acrylic acid or methacrylic acid (methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate) and urethane diacrylate compounds obtained by reacting trimethylhexamethylene diisocyanate with a dihydric alcohol and hydroxy monoester acrylate or hydroxy monoester methacrylate. These are used alone or in combination of two or more.

As the photopolymerization initiator (C) in the present invention, for example, aromatic ketones (benzophenone, 4,4 ')
-Dimethylaminobenzophenone (Michler's ketone),
4,4'-diethylaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2-ethylanthraquinone, phenanthrenequinone, etc., benzoin (benzoin methyl ether, benzoin ethyl ether, benzoin phenyl ether, etc.), 2,4,5 −
Triarylimidazole dimer (2- (o-chlorophenyl) -4,5-diphenylimidazole dimer, 2
-(O-chlorophenyl) -4,5-di (m-methoxyphenyl) -4,5-diphenylimidazole dimer,
2- (o-fluorophenyl) -4,5-diphenylimidazole dimer, 2- (o-methoxyphenyl)-
4,5-diphenylimidazole dimer, 2- (p-methoxyphenyl) -4,5-diphenylimidazole dimer, 2,4-di (p-methoxyphenyl) -5-phenylimidazole dimer, , 4-Di (p-methoxyphenyl) -4,5-diphenylimidazole dimer, 2
-Di (p-methylmercaptophenyl) -4,5-diphenylimidazole dimer) and the like, but are not limited thereto. These are used alone or in combination of two or more.

In the present invention, (b) the cushion layer comprises:
In addition to the essential components (B) the photopolymerizable compound having an ethylenically unsaturated group and (C) a photopolymerization initiator, usually a thermoplastic resin is used. As the thermoplastic resin, for example, polyethylene, ethylene-vinyl acetate copolymer resin,
Examples include ethylene ethyl acrylate copolymer resin, ethylene methacrylic acid copolymer resin, polyvinyl chloride resin, and ionomer resin.

In the (b) cushion layer of the present invention, the compounding amount of (B) the photopolymerizable compound having an ethylenically unsaturated group is 0.3 to 30 parts by weight based on 100 parts by weight of the total amount of the (b) cushion layer. Preferably by weight,
More preferably, the content is 0.3 to 20 parts by weight. If the amount is less than 0.3 parts by weight, the sensitivity of the (c) colored photosensitive resin layer tends to be unable to be suppressed, and if it exceeds 30 parts by weight, (c) The component (B) tends to migrate backward to the colored photosensitive resin layer, and the sensitivity tends to be higher than desired, and
(B) The cushion layer tends to be too soft and cannot be separated from the (c) colored photosensitive resin layer.

The (B) photopolymerizable compound having an ethylenically unsaturated group used in the (b) cushion layer in the present invention can be used in the (c) colored photosensitive resin layer described later ( B) It is not always necessary to be the same as the photopolymerizable compound having an ethylenically unsaturated group.
It is preferred that at least two or more (B) photopolymerizable compounds having an ethylenically unsaturated group are common.

In the (b) cushion layer of the present invention, the amount of the photopolymerization initiator (C) is preferably from 1.0 to 30 parts by weight based on 100 parts by weight of the total amount of the (b) cushion layer. . If the compounding amount is less than 1.0 part by weight, there is a tendency that fluctuation in sensitivity of the colored photosensitive resin layer (c) cannot be suppressed, and the light sensitivity tends to be insufficient. On the other hand, when the amount exceeds 30 parts by weight, the component (C) reversely moves from the (b) cushion layer to the (c) colored photosensitive resin layer, and the sensitivity tends to be higher than desired.

The (C) photopolymerization initiator used for the (b) cushion layer in the present invention is the same as the (C) photopolymerization initiator that can be used for the (c) colored photosensitive resin layer described later. However, it is not always necessary that they be the same, but it is preferable that one or more (C) photopolymerization initiators are common.

Further, the cushion layer (b) in the present invention may contain a wax in that it can be easily separated from the colored photosensitive resin layer (c).

The colored photosensitive resin layer (c) in the present invention is preferably a resin that can be exposed to ultraviolet light and developable with an aqueous alkali solution. For example, (A) an organic polymer compound having a carboxyl group; More preferably, it contains (B) a photopolymerizable compound having an ethylenically unsaturated group, (C) a photopolymerization initiator, and (D) a pigment or dye.

The (A) organic polymer compound having a carboxyl group in the present invention includes, for example, alkyl acrylate or alkyl methacrylate,
Copolymers of acrylic acid or methacrylic acid, copolymers of alkyl acrylate or alkyl methacrylate, acrylic acid or methacrylic acid, and vinyl monomers copolymerizable therewith, and the like can be given.

Examples of the alkyl acrylate or alkyl methacrylate include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, and methacrylic acid 2 −
Ethylhexyl and the like.

Examples of alkyl acrylate or methacrylate, or acrylic or methacrylic acid and vinyl monomers copolymerizable therewith include, for example, dimethylethyl acrylate, dimethylethyl methacrylate, tetrahydrofurfuryl acrylate ,
Tetrahydrofurfuryl methacrylate, 2,2,2-trifluoroethyl acrylate, 2,2,2-trifluoroethyl methacrylate, 2,2,3,3-tetrafluoropropyl acrylate, 2,2,3,3-tetra Fluoropropyl methacrylate, acrylamide, diacetone acrylamide, styrene, vinyltoluene and the like.

Further, polyesters such as terephthalic acid, isophthalic acid and sebacic acid, copolymers of butadiene and acrylonitrile, cellulose acetate, cellulose acetate butyrate, methylcellulose, ethylcellulose and the like containing acrylic acid or methacrylic acid as a copolymer component are also included. Can be used.

The weight average molecular weight of the (A) organic polymer compound having a carboxyl group in the present invention (a value measured by gel permeation chromatography and converted using a standard polystyrene calibration curve) is 20,000.
It is preferably set to ~ 300,000.

In the present invention, (B) the photopolymerizable compound having an ethylenically unsaturated group which can be used in the colored photosensitive resin layer (B) can be used in the above-mentioned (b) cushion layer. Examples thereof include photopolymerizable compounds having an unsaturated group, and these are used alone or in combination of two or more.

The (C) photopolymerization initiator which can be used for the colored photosensitive resin layer (C) in the present invention includes the above-mentioned (B) photopolymerization initiator which can be used for the cushion layer (b). These are used alone or in combination of two or more.

The pigment or dye (D) in the present invention is not particularly limited, and a known coloring agent can be used. The component (A) of the photosensitive resin layer, in particular, (A) an organic polymer having a carboxyl group The selection can be made in consideration of the compatibility with the compound or the photopolymerizable compound (B) having an ethylenically unsaturated group, a target hue, light transmittance, and the like.

In the colored photosensitive resin layer (c) of the present invention, the amount of the component (A) is determined by the total amount of the component (A) and the component (B) in the colored photosensitive resin layer (c). To 100 parts by weight, and preferably 20 to 60 parts by weight. If the amount is less than 20 parts by weight, the coating properties tend to be insufficient, and if it exceeds 60 parts by weight, the film properties of the cured product tend to deteriorate.

In the colored photosensitive resin layer (c) of the present invention, the amount of the component (B) is determined by the total amount of the component (A) and the component (B) in the colored photosensitive resin layer (c). Of 100 parts by weight, and preferably 40 to 80 parts by weight. If the amount is less than 40 parts by weight, the photosensitivity tends to be insufficient, and the film properties of the cured product tend to decrease. If it exceeds 80 parts by weight, the coating properties tend to be insufficient.

In the colored photosensitive resin layer (c) of the present invention, the amount of the component (C) is determined by the total amount of the components (A) and (B) in the colored photosensitive resin layer (c). 1
Preferably, the amount is 1.0 to 30 parts by weight based on 00 parts by weight. If the amount is less than 1.0 part by weight, the photosensitivity tends to be insufficient. If the amount exceeds 30 parts by weight, (c) light absorption on the surface of the colored photosensitive resin layer upon exposure And the photocuring inside tends to be insufficient.

In the colored photosensitive resin layer (c) in the present invention, the amount of the component (D) is determined by the total amount of the component (A) and the component (B) in the colored photosensitive resin layer (c). 1
Preferably, the amount is 1 to 50 parts by weight based on 00 parts by weight. . If the amount is less than 1 part by weight, the coloring tends to be insufficient, and if it exceeds 50 parts by weight, the light transmittance tends to decrease.

Further, the colored photosensitive resin layer (c) in the present invention may contain a thermopolymerizable component stabilizer, a thermosetting resin such as a melamine resin, and the like.

The photosensitive film of the present invention is obtained by dissolving (b) each component used for the cushion layer in a solvent on the transparent support film (a), applying the solution, and drying the solution (b). A cushion layer is formed, and then, on the (b) cushion layer, each component used for the (c) colored photosensitive resin layer is dissolved in a solvent, and this solution is applied and dried (c). ) It can be obtained by forming a colored photosensitive resin layer.

Examples of the solvent that dissolves each component used in (b) the cushion layer and (c) each component used in the colored photosensitive resin layer include acetone, methyl ethyl ketone, toluene, ethyl cellosolve, and the like. Examples include ethyl acetate, butyl acetate, propylene glycol monomethyl ether, propylene glycol monoethyl ether, and the like.

As a method of applying the (b) solution of the cushion layer and the (c) solution of the colored photosensitive resin layer, for example, a roll coater, a comma coater, a gravure coater, an air knife coater, a die coater, a bar coater And the like. The drying temperature of (b) the cushion layer and (c) the colored photosensitive resin layer is usually 40 to 150 ° C.
The drying time is usually 2 to 30 minutes.

The thickness of the cushion layer (b) in the photosensitive film of the present invention is preferably 3 to 30 μm, more preferably 5 to 20 μm. When the thickness is less than 3 μm, the effect of (b) providing the cushion layer is reduced, and (c) the substrate on which the first color pattern of the colored photosensitive resin layer is provided or the first color pattern and the second color pattern are formed. There is a tendency that the followability to the unevenness of the surface of the substrate provided with the pattern is insufficient, and if it exceeds 30 μm,
The cost tends to increase.

The thickness of the colored photosensitive resin layer (c) in the photosensitive film of the present invention is preferably 0.5 to 5.0 μm, more preferably 1.0 to 2.5 μm. preferable. When the film thickness is less than 0.5 μm, the coating film appearance tends to be poor (blurring) and the hue cannot be adjusted,
If it exceeds 5.0 μm, the cost tends to increase and the coating film appearance tends to be poor (streak due to flow).

In the photosensitive film of the present invention, (c) a protective film is further laminated on the (c) colored photosensitive resin layer in order to protect the colored photosensitive resin layer. Is preferred. As a protective film, for example,
A polyester film, a polyolefin film, or the like can be used, but a polyolefin film is preferable, and a polyethylene film is more preferable in terms of price, flexibility, strength, hardness, and the like. The protective film thickness is 10 to
Preferably it is 40 μm. Protective film thickness is 1
If it is less than 0 μm, the handleability tends to be poor, and if it exceeds 40 μm, the cost tends to increase.

Further, the photosensitive film of the present invention comprises (a)
On a transparent support film, (b) each component used for a cushion layer is dissolved in a solvent, and this solution is applied and dried to form (b) a cushion layer. On a film, (c) each component used for the colored photosensitive resin layer is dissolved in a solvent, and this solution is applied and dried to form (c) a colored photosensitive resin layer. , (B) and the (c) colored photosensitive resin layer in contact with each other.

The thus obtained photosensitive film of the present invention can be stored in the form of a roll.

The method for producing the color filter of the present invention is as follows.
(I) a step of laminating the photosensitive film of the present invention so that (c) a colored photosensitive resin layer is in contact with a transparent substrate; (II) (a) a transparent support film and (b)
A multicolor pattern is formed by repeating each step including a step of peeling the cushion layer and a step (III) of exposing and developing the colored photosensitive resin layer in a pattern. .

The transparent substrate in the present invention is not particularly limited as long as it is transparent, and examples of the material include glass and plastic. Hereinafter, the method for producing the color filter of the present invention will be described in detail. [(I) Step of bonding the photosensitive film of the present invention so that (c) the colored photosensitive resin layer is in contact with the transparent substrate] First, if necessary, a transparent substrate on which a black matrix is formed Is optionally heated (100-
(200 ° C., 3-30 minutes), and then on this transparent substrate,
(C) Laminating (laminating) the protective film of the photosensitive film while peeling it so that the colored photosensitive resin layer is in contact with the photosensitive film.

Lamination is usually performed by heating and softening the (c) colored photosensitive resin layer by a heatable roll called a hot roll or a heating jacket called a heat shoe and a roll called a laminate roll. Do. Laminating temperature during lamination is 60 ~
Preferably, the temperature is 150 ° C., and the roll pressure is 9.8.
It is preferable that the pressure is set to × 10 ^{4 to} 4.9 × 10 ⁵ Pa, and the laminating speed is set to 0.5 to 6.0 m / min.

[(II) Step of peeling off (a) the transparent support film and (b) the cushion layer] After the step (I) is completed, (c) the colored photosensitive resin layer
By peeling the (b) cushion layer, (a) the transparent support film and (b) the cushion layer can be peeled at the same time. Alternatively, (a) the transparent support film may be firstly peeled off, and then (b) the cushion layer may be peeled off.

As a peeling method, for example, one or both of (a) the transparent support film and (b) the cushion layer are hooked with a linear needle, a hook-shaped needle, or the like, and are caught / held and pulled. (A) a method in which the transparent support film and the (b) cushion layer are combined together and peeled off from the (c) colored photosensitive resin layer, or (a) the transparent support film is separated from the (b) cushion layer by (b) b) a method in which the cushion layer is separately peeled from the colored photosensitive resin layer, and a probe having an adhesive surface is adhered to the (a) transparent support film, and the probe is captured / held and pulled. (A) A method in which the transparent support film and the (b) cushion layer are combined together and peeled off from the colored photosensitive resin layer or a probe having an adhesive surface is adhered to the (a) transparent support film. Pulling and barking / retention,
(A) After peeling the transparent support film from the (b) cushion layer, the probe having an adhesive surface is adhered to the (b) cushion layer, and the probe is caught / held and pulled to thereby obtain the (b) cushion layer. (C) physically peeling off from the colored photosensitive resin layer.

[(III) (c) Step of Exposing and Developing the Colored Photosensitive Resin Layer in a Pattern] After the above-mentioned step (II) is completed, (c) On the colored photosensitive resin layer, To
A negative mask having a predetermined pattern is placed, and exposure is performed in a pattern. Exposure is usually performed using a contact or non-contact type using a dedicated exposure machine. As a light source for exposure,
For example, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, a xenon lamp, and the like that effectively emit ultraviolet light can be used. Next, the unexposed portion is removed by developing with a developing solution to form a colored pattern. Examples of the developing method include a dip method and a spray method, and a high-pressure spray method is most suitable for high resolution. As a developing solution, usually, in an alkali developing type,
An aqueous solution of 1% by weight of sodium carbonate or an aqueous solution of 0.1% by weight of borax is used, but the developer is not limited thereto as long as it is alkaline.

In the present invention, the step (I) and the step (II)
By repeating the step (III) and the step (III) a predetermined number of times using the photosensitive films of the present invention having different colors, it is possible to manufacture a color filter having a multicolored pattern formed thereon. Further, by using the photosensitive film of the present invention, when forming a colored pattern of the second color or later, the step of the pattern can be reduced without performing special processing.

[0051]

[Preparation of photosensitive film (1)]

(A) A solution of the (b) cushion layer shown in Table 1 was applied on a polyester film of a transparent support film using a comma coater, and the solution was applied to a hot air convection dryer at 100 ° C for 10 minutes.
After drying for 20 minutes, a film having a thickness of 20 μm after drying (b) on which a cushion layer was formed was obtained.

[0052]

[Table 1]

Next, a solution of the colored photosensitive resin layer (c) shown in Table 2 was separately coated on a (a) polyester film of a transparent support film by a gravure coater.
The film was dried with a hot air convection dryer at 0 ° C. for 10 minutes to obtain a (c) colored photosensitive resin layer-formed film having a dried film thickness of 2.0 μm.

[0054]

[Table 2]

Next, (b) of the film obtained above
The (c) colored photosensitive resin layer of the film was adhered to the cushion layer surface so as to be in contact therewith, thereby producing a photosensitive film (1).

[Preparation of Photosensitive Film (2)] Comparative Example 1 In Example 1, except that the components (B) and (C) were excluded from the formulation of the (b) cushion layer solution shown in Table 1. In the same manner as in Example 1, a photosensitive film (2) was produced.

[Preparation of Color Filter] Example 2 (c) A protective film on the colored photosensitive resin layer side of the photosensitive film (1) obtained in Example 1 [(a) Transparent support film (polyester) While peeling the film)], the colored photosensitive resin layer (c) was rolled on a glass substrate heated in advance at 150 ° C. at a roll temperature of 110 ° C., a roll pressure of 6 × 10 ⁵ Pa, and a lamination speed of 1. Lamination was performed at 0 m / min. Next, the (a) transparent support film (polyester film) of the (b) cushion layer and the (b) cushion layer are removed, and an exposure machine HMW-590 (5 kW, ultra-high pressure mercury lamp, Oak Manufacturing Co., Ltd.) is passed through a predetermined pattern of negative mask. ) At a light exposure of 400 mJ / cm ² in a pattern and then 0.1% by weight at 30 ° C.
The unexposed portions were removed by spray development with an aqueous borax solution for 20 seconds to form a first colored pattern.

This process of forming a colored pattern was repeated three times using a photosensitive film of each color in the order of red, blue, and green to form a multicolor pattern. The obtained multicolor patterns were neatly arranged and the obtained film thickness was good. Next, the obtained multicolor pattern was subjected to 45 ° C at 150 ° C.
After heating for a minute, a color filter was obtained.

Comparative Example 2 The procedure of Example 2 was repeated, except that the photosensitive film (1) obtained in Example 1 was replaced with the photosensitive film (2) obtained in Comparative Example 1. To form a first colored pattern. In the obtained first colored pattern, the film thickness of the pixel was reduced, and the target film thickness could not be obtained. Also,
This process of forming a colored pattern was repeated three times using photosensitive films of each color in the order of red, blue, and green to form a multicolor pattern. In the obtained multicolor pattern, the thicknesses of the red, blue, and green pixels were also uneven, so that the pattern could not be used as a color filter.

[0060]

According to the photosensitive film of the present invention, the migration of the monomer and the photoinitiator in the photosensitive resin layer to the cushion layer can be suppressed, the fluctuation of the sensitivity is small, the step is small, and the pattern with high precision is obtained. Is suitable for the production of a color filter which can be produced with high productivity. The photosensitive film according to claim 2 has the effect of the photosensitive film according to claim 1,
The transfer of the monomer and the photoinitiator in the photosensitive resin layer to the cushion layer can be further suppressed, and the fluctuation of the sensitivity is less. The photosensitive film according to claim 3 has the effects of the photosensitive film according to claim 1 or 2, and further has workability,
Excellent environmental safety. In the method for producing a color filter according to claim 4, it is possible to suppress the transfer of the monomer and the photoinitiator in the photosensitive resin layer to the cushion layer.
A method of manufacturing a color filter with small steps and capable of manufacturing a highly accurate pattern with high productivity can be achieved.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location G03F 7/027 511 G03F 7/027 511 7/028 7/028 (72) Inventor Naohiro Tanikawa Ibaraki 4-13-1, Higashicho, Hitachi City Hitachi Chemical Co., Ltd. Yamazaki Factory

Claims (4)

[Claims] 1. A photosensitive film obtained by sequentially laminating (a) a transparent support film, (b) a cushion layer, and (c) a colored photosensitive resin layer. A) a photosensitive film containing a photopolymerizable compound having an ethylenically unsaturated group and (C) a photopolymerization initiator. 2. The compounding amount of the photopolymerizable compound (B) having an ethylenically unsaturated group in the (b) cushion layer is 0.3 to 30 parts by weight based on 100 parts by weight of the total amount of the cushion layer. The photosensitive film according to claim 1, wherein the compounding amount of (C) the photopolymerization initiator is 0.1 to 30 parts by weight based on 100 parts by weight of the total amount of the cushion layer. (C) the colored photosensitive resin layer comprises:
(A) an organic polymer compound having a carboxyl group,
(B) a photopolymerizable compound having an ethylenically unsaturated group,
The photosensitive film according to claim 1, comprising (C) a photopolymerization initiator and (D) a pigment or a dye. 4. (I) a step of bonding the photosensitive film according to claim 1, 2 or 3 so that (c) a colored photosensitive resin layer is in contact with a transparent substrate, and (II) (a) The multicolor pattern is obtained by repeating the steps of: (a) removing the transparent support film and (b) the cushion layer, and (III) (c) exposing and developing the colored photosensitive resin layer in a pattern. Forming a color filter.