JPH08179117A - Production of color filter - Google Patents

Abstract

PURPOSE: To provide a process for producing a color filter, on which fine patterns of multiple colors are formed, having a uniform thickness and high accuracy, free from difference is level and drop-out on a substrate, and has excellent heat resistance by improving the follow up characteristic of a photosensitive film to the substrate and the workability of lamination. CONSTITUTION: This process for producing color filter forms multicolor patterns by repeating stages including at least (1) a stage for sticking the photosensitive film consisting of a base film 1 and a photosensitive resin layer 2 colored in single color on the transparent substrate 4 in such a manner that the colored photosensitive resin layer 2 faces the substrate 4, (2) a stage for exposing this layer in a pattern form and (3) a developing stage. The process includes a stage of executing the stage of sticking the colored photosensitive resin layers 2 of the second and subsequent colors by forming spaces 5 between pixels in such a manner that these layers face the substrate 4 and shifting the photosensitive resin layers 2' of the second and subsequent colors to the inter-pixel spaces 5 by impressing a pressure on the colored photosensitive resin layers 2 before development after the base film 1 is peeled between the stages (1) and (3).

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for manufacturing a color filter.

[0002]

2. Description of the Related Art A color filter is an extremely transparent stripe-like or mosaic-like pattern having two or more different hues, which are parallel to each other on a surface of an optically transparent substrate such as glass. Or, they are crossed and arranged. These patterns must be arranged in order in a predetermined order with hues at a predetermined interval, and it is necessary to form a uniform layer with little thickness unevenness, and the color filters of the screen printing method, the photolithography method, the dyeing method, etc. Manufacturing methods have been proposed.

There is also known a method for producing a color filter, which uses a base film and a photosensitive film having a photosensitive resin layer and can easily form a multi-color fine stripe-shaped or mosaic-shaped pattern with high accuracy. There is. Photosensitive films are known and disclosed in Japanese Patent Publication No. 45-25231.

As a method for preparing a color filter using a photosensitive film, a photosensitive resin composition of a photosensitive film obtained by applying a photosensitive resin composition colored in one color to a base film and drying the photosensitive resin composition on a transparent substrate is used. And then exposed to light through a predetermined pattern mask and developed to form a pattern (JP-A-61-99102 and JP-A-3-1).
No. 60454, No. 3-111802, No. 2-151805, No. 4-212161.
Japanese Patent Application Laid-Open No. 4-301602, Japanese Patent Application Laid-Open No. 5-2
No. 107, etc.) is known.

In order to obtain a good pattern, the photosensitive film needs to improve its followability. As a method of improving the followability of the photosensitive film, for example, even if there is a step on the substrate, the three-layer resist method (J.Vac.Sci.Te
chnol., 16: 1620, published in 1968, etc.), the photosensitive resist layer is heated before development and after exposure at 50 to 150 ° C. for 30 to 60 seconds to cause reaction of the lower layer portion which is not sufficiently exposed to UV light. After-bake method for promoting heat treatment (Japanese Patent Application Laid-Open No. 3-19659)
No. 6, etc.) and the like. In addition, in a color filter using a pigment-dispersed photopolymer, the generation of monomer radicals induced by the radicals of the photoinitiator and its polymerization chain reaction are promoted, and a photosensitive resist layer is applied using a spinner to remove the solvent. Pre-bake (eg, 85 ℃
Prebaking method (J.Photopolym.Sci.Tec)
hnol., Vol.2, No.2, 1989, pp. 244-248).

Conventional color filter manufacturing methods (eg,
Dyeing method, pigment-dispersed liquid resist method, printing method, roll coater method, pigment-dispersed film resist method, etc.), when forming the layer of the second color or later, the colored layer of the second color or later on the already formed color layer. A step is formed between the colored layer and the colored layer that is in direct contact with the substrate. This step exceeds 1.0 μm at maximum, and if ITO is directly sputtered on this step, the ITO
Since the wire breakage and the distance between the electrodes sandwiching the liquid crystal become non-uniform and a good color display cannot be obtained, a film of 2 to 5 μm generally called a protective film or an overcoat film is formed, and the surface is covered. It is being made uniform. In the film method, this step is the thickness of the already formed colored layer (1-5
μm), and this step makes it difficult for the new colored layer to come into contact with the base (transparent glass), and because the adhesive pressure is insufficient, the new colored layer does not adhere to the base,
When the base film is peeled off, a part where the new color layer is not adhered is peeled off along with the base film, and when exposed and developed as it is, disadvantages such as exposure of a part where the new color layer does not exist are generated, and the desired There is a drawback that a color filter cannot be obtained. In addition, on the pixels of the second and subsequent colors, part of the colored photosensitive resin layer that had been on the pixels of the first color flows in, and in the second color, the edge close to the pixels of the first color is lifted and the pixel surface is slanted. (J-shaped, n-shaped cross section). On the pixel of the third color, the colored photosensitive resin layer flows in from the adjacent pixels on both sides, so that both ends of the pixel are lifted (it becomes an M-shaped cross section). FIG. 2 shows a schematic view of a cross section of J-shaped, n-shaped, and M-shaped pixels. If there is a J-shaped or M-shaped lifting, the unevenness of the surface of the pixels of the three colors is not obtained, the desired flatness cannot be obtained, and the lifted edge comes into contact with the counter electrode, causing an image defect and causing color unevenness. There was a defect such as causing it. The film followability cannot be improved only by adhering the colored photosensitive resin layer to the substrate and passing it through a pressure roll (laminating) while peeling off the protective film of the photosensitive film after heating the substrate.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks, improves the followability of the photosensitive film to the substrate, the workability of the laminate, and has a uniform thickness on the substrate with high accuracy.
It is intended to provide a method for producing a color filter having excellent heat resistance, in which a multicolor fine pattern having no steps or blanks is formed.

[0008]

According to the present invention, there is provided a photosensitive film comprising a base film and a photosensitive resin layer colored in one color on a transparent substrate, wherein (1) the colored photosensitive resin layer is A step of bonding so as to face the substrate,
In a method for producing a color filter in which a step of exposing at least a pattern and (3) a step including at least a developing step are repeated to form a multicolor pattern, a colored photosensitive resin layer of a second color or later is formed on the substrate. A space is formed between the pixels so that they face each other, and the process of bonding the pixels is performed. During the processes of (1) and (3), the photosensitive resin layers of the second and subsequent colors are heated from the base film to the inter-pixel space. The present invention relates to a method for manufacturing a color filter, which includes a transition step A of transitioning to a space between pixels and a transition step B of transferring a photosensitive resin layer of a second color or later to an inter-pixel space by pressurization.

In order to flatten the surface of the pixels of the color filters for the second and subsequent colors, the photosensitive resin layer for the second and subsequent colors is transferred to the space on the substrate surface, which is carried out between the steps (1) and (3). FIG. 1 shows the aspects of the transition process A and the transition process B to be performed.
Will be explained. FIG. 1 is a sectional view of a film and a filter showing the manufacturing method of the present invention, in which the base film 1 is P
An example will be described where ET (polyethylene terephthalate film) is used to form the colored photosensitive resin layer in the order of red (R) and green (G).

In (a), a colored photosensitive resin layer of a photosensitive film comprising a base film 1 (PET (polyethylene terephthalate film)) and a colored photosensitive resin layer (green) 2 and front pixels (red) 3 are arranged in an orderly manner. Transparent substrate 4
Shows the state in which is facing. (B) shows the bonding in which a space is formed between pixels of the colored photosensitive resin layer (green) 2 of the photosensitive film and the substrate on which the front pixels (red) 3 are arranged in order. At this time, the colored photosensitive resin layer 2 does not have to follow the front pixels 3 and the transparent substrate 4, and it is preferable that the colored photosensitive resin layer 2 is in a completely flat state and is in contact with the surface of the front pixels 4. In (b), green (G) colored photosensitive resin layer (green)
2 shows a state in which the pixel 2 is in close contact with the front pixel (red) 3. The space 5 is a space where neither the green colored photosensitive resin layer (green) 2 nor the front pixel (red) 3 is present. Part, a part filled with nitrogen when laminated in a nitrogen stream, and a part filled with air when laminated in air.

(C) is the start of the transition step A in the present invention, and is (1) to (3) of the above steps (1) to (3).
It is a step which enters between (3) and replaces the space with the colored photosensitive resin layer (G). The transfer of the colored photosensitive resin layer (G) to the space is performed by heating. Immediately after bonding in the state of (b), the green colored photosensitive resin layer 2 is in close contact with the base film 1, but the fluidity increases due to heating, and it moves into the space 5 on the substrate surface 4 due to gravity. To start. The green colored photosensitive resin layer 2 is a transparent substrate 4 rather than the base film 1.
It can be inferred that the contact angle of the green colored photosensitive resin layer is larger than the contact angle of PET (polyethylene terephthalate) with respect to the substrate. In some cases, the droplet may be formed on the surface of the base film to increase, contact the substrate, and then spread on the substrate to complete the transfer. (D) is the time when the transfer step A is completed, the green colored photosensitive resin layer has completed transfer to the space on the substrate surface, and a space appears on the surface,
The space is replaced with the colored photosensitive resin layer. At this time, since the colored photosensitive resin layer is made uniform by its surface tension, the flatness of the surface is excellent, and the pixel after development has almost the same cross-sectional shape as the first color. Although the case where the first color is red and the second color is green has been described above as an example, the order of colors is not limited to this. In addition to the order of red, green, blue and black, any color order such as black-blue-green-red and black-red-blue-green is possible in the present invention.

The heating is preferably carried out at room temperature or above and below the temperature at which the colored photosensitive resin layer starts the thermosetting reaction. The transfer is completed at a low temperature for a long time and at a high temperature in a short time, and the transferred colored photosensitive resin layer surface has a high degree of flatness. Heating includes hot plate heating, oven heating, ultrasonic heating, infrared heating, electromagnetic induction heating, hot water immersion, friction heating, heating in a pressure oven, and heating in a vacuum container. Not limited. The transition step A of the present invention includes the above (1) to
It may be carried out during (3), before or after the exposure step of (2), twice before and after the exposure step, or in the exposure step. Although the transfer step A in the state where the base film is present has been described above, the transfer step A may be performed after the base film is peeled off.

In (c), the uncured colored photosensitive resin layer (g, green) 2 and the photocurable colored photosensitive resin layer (G, G,
Green) 2 ', but the uncured colored photosensitive resin layer (g, green) 2 and the photocurable colored photosensitive resin layer (G, green) 2'
Is attached to the base film 1. (D) shows a state after the base film 1 is peeled off at the time when the transfer step A by heating in the present invention is completed. A part of the uncured colored photosensitive resin layer (g, green) 2 and the photocurable colored photosensitive resin layer (G, green) 2'migrate to the space 5 and adhere to the transparent substrate 4. A part of the uncured colored photosensitive resin layer (g, green) 2 remains on the front pixel (red) 3. (E) has shown the time of the start of the transfer process (B) by pressurization in this invention. (D)
When a part of the uncured colored photosensitive resin layer (g, green) 2 and the photo-curable colored photosensitive resin layer (G, green) 2'which have not been sufficiently transferred in the step of the present step exist, the present invention is added. The pressure transfer step B completes the transfer. (F) shows the pixel arrangement after the development process, in which 2'and 3 are arranged on 4 in an orderly manner.

The transition step B is performed by pressurization. For example,
Mirror-finished rubber rolls and back rolls with good releasability and with a surface smoothness of 0.1 μm or less for color filter substrates with the base film peeled off and the colored photosensitive resin layer before development exposed Pressure can be applied by pressing the gap between the glass surfaces with the glass surface facing the rear roll. Such a rubber roll is made of silicone and contains a release agent therein. The surface of the rubber roll is sufficiently polished so that the shape of the rubber roll is good. The rubber roll whose material is silicone rubber preferably has a rubber hardness in the range of 15 to 80, and if the rubber hardness is less than 15, the pushing pressure tends to be insufficient. If the rubber hardness exceeds 80, the accuracy is insufficient to transfer the colored photosensitive resin layer having a film thickness of 1.0 to 3.0 μm, and the effect of the pressure transfer step tends to decrease. It is preferable that the rubber roll contains a silicone-based release agent. The method of pressurization includes, but is not limited to, a method of spraying water from a nozzle with a water flow having a water pressure, a curtain-shaped water flow, an air gun, a finger pad, and the like.

The photosensitive film used in the present invention is a transparent base film for peeling, for example, a film of polyethylene terephthalate or the like, on which a photosensitive resin composition colored in one color is applied and dried to form a background-colored photosensitive film. A photosensitive resin layer is applied and dried to form a colored photosensitive resin layer. Since the photosensitive resin layer is uncured, flexible and adhesive, a protective film such as polyethylene film should be attached on top of the photosensitive resin layer to prevent external damage and adhesion of foreign matter. Is preferred. The colored photosensitive resin layer formed on the photosensitive film is attached to the transparent substrate while peeling off the protective film, and the base film on the surface of the colored photosensitive resin layer is removed before development.

The color filter of the present invention is manufactured, for example, as follows. First, a colored photosensitive resin formed on a photosensitive film is attached to a transparent substrate, and a negative mask having a predetermined pattern is placed on the base film on the surface of the colored photosensitive resin for exposure, and then the base film is removed. Then, the unexposed portion is developed with a developing solution to form a colored pattern. This colored pattern forming step is repeated a predetermined number of times using photosensitive films of different colors to form a multicolored pattern to obtain a color filter. When forming a thin line with a colored photosensitive resin layer attached on a transparent substrate, the colored layer after development may be flexible because it is exposed with the minimum exposure amount that can withstand the developing solution, and further UV rays are required after development. By irradiation, electron beam irradiation and / or heat treatment, the colored layer can be completely cured to give strength and heat resistance.

The photosensitive resin composition colored in one color comprises an ethylenically unsaturated compound (a), a carboxyl group-containing film-forming polymer (b), a photopolymerization initiator (c) and a pigment or dye (d). It is preferably contained. Further, the thickness of the photosensitive resin layer of the photosensitive film obtained by applying and drying the photosensitive resin composition on the base film is preferably 0.5 to 15 μm.

As the ethylenically unsaturated compound (a),
For example, a compound obtained by adding an α, β-unsaturated carboxylic acid to a polyhydric alcohol (trimethylolpropane di (meth) acrylate (means methacrylate or acrylate; hereinafter the same), trimethylolpropane tri (meth)) Acrylate, tetramethylolmethane tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, etc., obtained by adding α, β-unsaturated carboxylic acid to a glycidyl group-containing compound A compound, a compound having a polyvalent carboxylic acid (phthalic anhydride, etc.) and a hydroxyl group and an ethylenically unsaturated group (2-hydroxy (meth) acrylate, etc.) and the like are also used. These compounds are used alone or in combination of two or more. The blending amount of the component (a) is preferably 90 to 50 parts by weight based on 100 parts by weight of the total amount of the components (a) and (b).

The carboxyl group-containing film-forming polymer (b) is, for example, a copolymer of (meth) acrylic acid alkyl ester and (meth) acrylic acid, or (meth) acrylic acid alkyl ester and (meth) acrylic acid. And a vinyl monomer copolymerizable therewith. Examples of the (meth) acrylic acid alkyl ester include (meth) acrylic acid methyl, (meth)
Examples thereof include ethyl acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.
By using the component (b), the coating properties and the film properties of the cured product are improved, and the blending amount is 10 to 50 parts by weight based on the total amount of the components (a) and (b) being 100 parts by weight. Is preferred. If the blending amount is less than 10 parts by weight, the ethylenically unsaturated compound is increased, so that the photosensitivity tends to decrease, and if it exceeds 50 parts by weight, the photocured product tends to become brittle. Further, the weight average molecular weight of the component (b) is preferably 10,000 or more from the viewpoint of the coating property and the film strength.

Examples of the photopolymerization initiator (c) include benzophenone, N, N'-tetramethyl-4,4'-diaminobenzophenone (Michler's ketone), N, N '.
-Tetramethyl-4,4'-diaminobenzophenone,
4-methoxy-4'-dimethylaminobenzophenone,
Aromatic ketones such as 4,4′-diethylaminobenzophenone, 2-ethylanthraquinone and phenanthrenequinone are used. These are used alone or in combination of two or more. The blending amount of the component (c) is (a)
0.1 for the total amount of 100 parts by weight of component and (b) component
It is preferably 10 to 10 parts by weight. This blending amount is 0.
If it is less than 1 part by weight, the photosensitivity tends to be insufficient,
If it exceeds 10 parts by weight, light absorption on the surface of the composition during exposure tends to increase, and internal photocuring tends to be insufficient.

As the above-mentioned pigment or dye (d), a generally known coloring agent can be used, and the compatibility with a photosensitive resin layer, particularly an ethylenically unsaturated compound or a carboxyl group-containing film imparting polymer, is targeted. It is selected in consideration of hue, light transmittance and the like.

There are various compounds as pigments which can be used in the color filter, and examples thereof include inorganic pigments such as barium sulfate, zinc oxide, lead sulfate, titanium oxide, red iron oxide, carbon black, graphite and chromium oxide, and the following organic pigments. (Color index number) etc. Yellow pigment: CI Pigment Yellow 20, 24, 83,
86, 93, 109, 110, 117, 125, 13
7, 138, 139, 147, 148, 153, 15
4, 166, 168 Orange Pigment: CI Pigment Orange 36, 43, 5
1, 55, 59, 61 Red pigment: CI Pigment Red 9, 97, 122, 1
23, 149, 168, 177, 180, 092, 21
5, 216, 217, 220, 223, 224, 22
6, 227, 228, 240, 48: 1 violet pigment: CI pigment violet 19,
23, 29, 30, 37, 40, 50 Blue Pigment: CI Pigment Blue 15, 15: 6, 2
2,60,64 Green pigment: CI Pigment Green 7,36 Black pigment: CI Pigment Black 7

The amount of the component (d) to be blended is preferably 1 to 50 parts by weight based on 100 parts by weight of the total amount of the components (a) and (b). If the content is less than 1 part by weight, coloring tends to be insufficient, and if it exceeds 50 parts by weight, the light transmittance tends to decrease.

The photosensitive resin composition may be a melamine resin and / or an epoxy resin which reacts thermally with the carboxyl groups of the carboxyl group-containing film-forming polymer in order to enhance the heat-curing property, crosslink density and heat resistance. To
1 for 100 parts by weight of the total of components (a) and (b)
It is preferable to add ~ 20 parts by weight and heat. The heating temperature is preferably 130 to 200 ° C., and the heating time is preferably 30 to 60 minutes.

[0025]

EXAMPLES The present invention will be described below with reference to examples. Example 1 (1) Production of coating liquid for colored photosensitive resin layer 135 parts by weight of pigment paste of any one of Table 2, 135 parts by weight of melamine resin and silane in 200 parts by weight of a solution obtained by uniformly dissolving the materials of Table 1 5 parts by weight of each coupling agent was added and dissolved and dispersed to obtain a coating liquid for colored photosensitive resin layer.

[0026]

[Table 1]

[0027]

[Table 2]

Melamine resin Cymel 300 (trade name of hexamethoxymethyl melamine, manufactured by Mitsui Toatsu Co., Ltd.) Silane coupling agent KBM503 (manufactured by Shin-Etsu Chemical Co., Ltd.) Preparation of coating liquid The coating liquid is ultrasonic 2. It was dispersed and adjusted for 5 hours.

(2) Production of Photosensitive Film The obtained solution was applied to a polyethylene terephthalate film having a thickness of 23 μm (Tetron film F2 manufactured by Teijin Ltd.).
3) A kiss-touch reverse type coating machine was used to apply a uniform thickness, and the coating was dried in a dryer at 100 ° C. for 2 minutes.
As a protective film, a 30-μm-thick polyethylene film was laminated to obtain a photosensitive film. The thickness of the photosensitive resin layer after drying is 2.0 μm for each of red, blue and green.
Met.

(3) Production of color filter (a) Substrate heating step The base substrate for the color filter was heated at 80 ° C. for 10 minutes. (B) Laminating Step The colored photosensitive resin layer was laminated on the base substrate for the color filter under the following conditions while removing the protective film of the photosensitive film for the color filter. Roll temperature 60 ℃ Roll pressure 1.0kgf / cm ² (air cylinder pressure) Speed 2.5m / min (c) Exposure process Predetermined pattern (normal stripe pattern, 7
Exposure machine HMW-201 through a negative mask of 0 μm (white) / 230 μm (black) and 150 mm long)
B (3 kW, ultra-high pressure mercury lamp, manufactured by Oak Manufacturing Co., Ltd.) was used for exposure. (D) Transfer Process A During the formation of the second and third color pixels, the colored photosensitive resin layer that had been through the space was transferred by heating at 60 ° C. for 15 minutes. (E) Peeling step The polyethylene terephthalate film was removed at room temperature. Peeling was performed using an automatic peeling device (home-made prototype, a device that peels polyethylene terephthalate film with a roll to which double-sided tape is attached). (F) Transfer Step B At the time of forming the pixels of the second and third colors, the transfer was carried out by applying a pressure by a rubber roll after the peeling step, and the colored photosensitive resin layer that had been through the space was transferred to the surface of the red substrate.

That is, a rubber roll with a surface smoothness of less than 0.1 μm and a mirror finish, made of silicone rubber and having a rubber hardness of 50, a rubber thickness of 4 mm and a diameter of 100 mm (air cylinder pressure 1.0 kgf / cm ² ) And a rear roll (fixed) with the same specifications as the rubber roll except that the rubber hardness is 100 without mirror finish, with the base substrate surface as the rear roll side and pressure is applied by a pressure bonding method. I went. (G) Development step The unexposed portion was removed by spray developing with a 0.08 wt% Na ₂ CO ₃ aqueous solution at 30 ° C. for 15 seconds, washed with water after development, and oven-dried to form a colored pattern.

The steps of forming the colored patterns (a) to (g) were repeated using the photosensitive films of respective colors in the order of red, blue and green. When laminating the second color blue, the film was fed with the feeding direction of the film orthogonal to the red stripe pattern of the front pixels.

A multicolor pattern was formed in the same manner for the third color, green. The exposure amount at this time was 50 mJ / cm ² for each of the red, blue and green photosensitive resin layers. The pattern of the mask used is one in which the stripes form an independent rectangle for each pixel and a gap is provided in the longitudinal direction of the stripes.

An ultraviolet irradiator (lamp H5600L / 2, manufactured by Toshiba Denshi Co.) was applied to the obtained multicolor pattern to 3 J / cm.
After irradiating with ² , the color filter was obtained by heating at 150 ° C. for 45 minutes. The obtained color filter had red, blue and green patterns (striped patterns) arranged in order, and had good followability. Further, there was no step between pixels, and neither M-shape nor J-shape was recognized in the cross section of the pixel.

Example 2 The same procedure as in Example 1 was carried out except that the materials shown in Table 3 were used, and good results were obtained in the same manner as in Example 1.

[Table 3]

Example 3 The same results as in Example 1 were obtained except that the materials in Table 4 below were replaced with the materials in Table 1.

[Table 4]

Example 4 For blue and green, the following (d) transition steps A and (e)
The same procedure as in Example 1 was performed except that the transition step B was performed, and good results were obtained in the same manner as in Example 1. (D) Transfer process A At the time of forming the second and third color pixels, the colored photosensitive resin layer was transferred through the space by heating at 33 ° C. for 20 minutes. (F) Transition step B Rubber made of silicone and containing a release agent, rubber thickness 1 m
The transfer was performed by applying pressure using a rubber roll of m.

Example 5 For blue and green, the following (d) transition steps A and (e)
The same procedure as in Example 1 was performed except that the transition step B was performed, and good results were obtained in the same manner as in Example 1. (D) Transfer process A During the formation of the second and third color pixels, heating was performed at 60 ° C. for 15 minutes to transfer the colored photosensitive resin layer through the space to the substrate surface. (E) Transition step The rubber hardness of the rubber roll was 15, and the rubber hardness of the back roll was 80.

Example 6 For blue and green, the following (d) transition steps A and (e)
The same procedure as in Example 1 was performed except that the transition step B was performed, and good results were obtained in the same manner as in Example 1. (D) When forming the second and third color pixels, 15 at 40 ° C
After heating for a minute, the colored photosensitive resin layer that had been through the space was transferred to the surface of the substrate. (E) Transfer step B The base film is peeled off and pressurized with an air gun,
The part of the insufficient migration was migrated.

Example 7 For blue and green, the following (d) transition steps A and (e)
The same procedure as in Example 1 was performed except that the transition step B was performed, and good results were obtained in the same manner as in Example 1. (D) When forming the second and third color pixels, 15 at 40 ° C
After heating for a minute, the colored photosensitive resin layer that had been through the space was transferred to the surface of the substrate. (E) Transfer step The base film was peeled off, and the colored photosensitive resin layer before development was pressed with a finger pad to apply pressure to transfer an insufficiently transferred portion.

Comparative Example 1 The same procedure as in Example 1 is carried out, except that (d) transition step A and (e)
A color filter was prepared by omitting the transition step B. The process of forming the colored pattern was repeated using the photosensitive films of respective colors in the order of red, blue and green. When laminating the second color blue, the film was fed with the feeding direction of the film orthogonal to the red stripe pattern of the front pixels. The same was applied to the third color green, and a multicolor pattern was formed. The exposure amount at this time was 50 mJ / cm ² for the red, blue and green photosensitive resin layers. The pattern of the mask used is one in which the stripes form an independent rectangle for each pixel and a gap is provided in the longitudinal direction of the stripes. An ultraviolet irradiator (lamp H5600L / 2,
After irradiation with ³ J / cm ² using Toshiba Denshi Co., Ltd., 15
A color filter was obtained by heating at 0 ° C. for 45 minutes. The resulting color filter had red, blue and green patterns (striped patterns) arranged in order. However, the followability was poor, and many white spots were observed in green and blue. Also,
The step difference in the pixel was 0.8 μm for green and 0.5 μm for blue, and the cross section of the pixel was M-shaped or J-shaped.

[0042]

According to the manufacturing method of the present invention, it is possible to form a highly precise multi-color fine pattern having a uniform thickness on a substrate with good followability and workability of a photosensitive film and a uniform thickness. It is possible to manufacture a color filter having excellent heat resistance.

[Brief description of drawings]

FIG. 1 is a schematic view showing a production method of the present invention.

FIG. 2 is a schematic view of a cross section of a pixel of a conventional color filter.

[Explanation of symbols]

 1 Base Film 2 Colored Photosensitive Resin Layer (Green) 2'Photocurable Colored Photosensitive Resin Layer (Green) 3 Front Pixel (Red) 4 Transparent Substrate 5 Space 6 Transition Roll 7 First Color Pixel 8 Second Color Pixel 9 Third color pixel

Claims (2)

[Claims] 1. A photosensitive film comprising a base film and a photosensitive resin layer colored in one color on a transparent substrate,
A multicolor pattern is formed by repeating the steps of (1) laminating the colored photosensitive resin layer so as to face the substrate, (2) exposing in a pattern, and (3) at least a developing step. In the method of manufacturing a color filter, a step of forming a space between pixels and adhering is performed so that the second and subsequent colored photosensitive resin layers face the substrate, and the steps of (1) and (3) above are performed. During the process, a transfer process A in which the photosensitive resin layer of the second color or later is transferred from the base film to the inter-pixel space by heating, and a transfer process of transferring the photosensitive resin layer in the second color or later to the inter-pixel space by pressurization. A method for producing a color filter, which comprises B. 2. The transition step B is performed by passing a transparent substrate side with a transparent substrate side as a backside roll between a mirror-finished rubber roll having a good peelability and a surface smoothness of 0.1 μm or less and a backside roll. The method for producing a color filter according to claim 1, wherein the color filter is pressed.