JPS61279802A - Production of color filter - Google Patents

Abstract

PURPOSE:To obtain a fine and distinct colored image pattern by transferring the transferrable red, blue and green images formed by exposing, developing and dyeing of a photoresist on a transparent base. CONSTITUTION:Three sheets of photosensitive resin sheets are superposed on a matrix-shaped exposing mask having the patterns in different positions and are subjected to exposure. The photosensitive resin sheets are then subjected to a developing process then to dyeing to red, blue and green colors by which the sheets having the matrix images on respectively different bases are obtd. The tentative base 1 having the red image is first superposed and laminated on the image receiving sheet in such a manner that the image side thereof contacts with the image receiving layer 8 of said sheet. Only the base 1 of the image sheet is stripped from a primer layer 3 to transfer the red image on the image receiving sheet. The blue and green images are similarly transferred on such image receiving sheet and the sheet having three colors of the images on the tentative image receiving sheet 6 is obtd. The sheet is then superposed and laminated on a polarizing film and the tentative image receiving sheet 6 and the polarizing film 11 are stripped, by which a color filter is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a color filter. Recently, liquid crystal, plasma EL (electroluminescence),
LED (light emitting diode).

Research is progressing on panels using fluorescent display tubes and the like.

Among these, LCD displays are low voltage.

Liquid crystal displays are being actively researched because they can be driven with low power.

How to display color on LCD screen.

A transparent substrate with transparent electrodes arranged in a matrix and a transparent substrate with transparent electrodes all over the surface are pasted together with the transparent electrodes on the inside via a spacer, and a liquid crystal is sealed in a cell. It is used by sandwiching it between two polarizing plates and overlaying a color filter on top of it.

A color filter is one in which red, blue, and red images are provided in a matrix or stripe shape on a transparent support.

The color filter may be used by being sandwiched between a transparent substrate provided with transparent electrodes and a polarizing plate. In addition, a transparent substrate with transparent electrodes provided on the entire surface is used as a transparent substrate for color filters, and a matrix-shaped image of red, blue, and green is provided on the surface of the transparent electrode or the opposite surface of the substrate, which can also be used as a color filter. .

[Conventional technology]

What is the traditional manufacturing method for color filters?

(1) A method of printing images of each color in a matrix on a transparent substrate with transparent electrodes arranged in a matrix (1) After forming a colored layer on the transparent substrate by coating, apply photoresist on top of it. The process involves coating, exposing images in a matrix, developing to form a resist mask in a matrix, and then removing the colored layer in the areas not covered by the resist mask by selective thinning. and the method for 1□ 3 colors of green;
1 (IIl,) method by electrodeposition, '1, etc.

However, in method (1), the printing ink “:e-
+""'・1"0"171"16-"21, this rounding, the inability to obtain a finer/9-turn color image, and the fact that when printing (= accurately aligning the three-color image pattern) Because of this it is difficult.

Please note that there is a drawback that some images may overlap.
The method 1(n) requires many complicated steps for manufacturing, resulting in high costs and has the disadvantage that it is difficult to accurately align the images of each color. . Also, on top of the colored image pattern,
When providing colored layers of different hues, a resist dyeing method is required so that /9 turns of the colored image are not dyed, which has the disadvantage that the process becomes even more complicated.

[Problems to be solved by the present invention]

The objects of the present invention are to provide a method for manufacturing a color filter having a finer colored image pattern, to provide a method for manufacturing a color filter having a clear colored image pattern without bleeding at image boundaries, and to provide a method for manufacturing a color filter having a clear colored image pattern without bleeding at image boundaries; To improve the accuracy of alignment, to provide a method for manufacturing a color filter that allows easy alignment of image patterns of each color, and to obtain a color filter at a low cost through a simpler production process. The purpose is to provide a method for producing color filters.

[Means for solving problems]

The object of the invention is to provide transferable red, blue
, : achieved by transferring a color and green image to a transparent support.

These three color images may be created on different temporary supports, and then transferred to the final transparent support through three transfer operations.

In addition, three-color images created on different temporary supports are once transferred onto one temporary image-receiving sheet by three transfer operations to create a sheet carrying three-color images. The color image may be transferred to the final transparent support in a single transfer operation.

This way, you can check the alignment during the process, so 1
Advantageously, there is less loss of final transparent support due to misalignment.

A method of creating a colored image by exposing and developing a photoresist and transferring this to a final support to create a color image is described in JP-A-79-9') 1140. The material described in JP-A-69-9'1i<to can also be used in the present invention.

There are no particular restrictions on the type of transparent support that serves as the substrate for the temporary support, temporary image-receiving sheet, and color filter, but it is necessary that it does not undergo significant deformation, shrinkage, or elongation under heating and/or pressure. . Examples of such supports include polyethylene terephthalate films, cellulose triacetate films, polystyrene films, polycarbonate films, polymer-laminated paper glass plates, and the like. Among these, transparent supports are preferable because alignment using transmitted light is easy. A biaxially oriented polyethylene terephthalate film or a glass plate is particularly preferred in terms of dimensional stability and transparency.

As the substantially transparent support to which the image is finally transferred, a polarizing film may be used, or a transparent substrate provided with a transparent electrode may be used.

As a polarizing film, polymer 'Lj-/ / size pg30~g
3u (/9gu) and those described in JP-A-Shos, y-iot4c3S are used. As a product, for example, "1 Varilight" manufactured by Royal Electric Machinery Corporation is sold.

7. The transparent electrode is made of polymer. ? ,//issue pt3J~t3 Hiro and JP-A-ShoA O-,7? , t 90 is used. A specific example is 8n02゜In2O
3. A transparent conductive film such as ITO (Indium Tin (Jxide)) or a metal thin film such as Au or A-eI pd is used.

An undercoat layer may be applied to the surface of the temporary support for the purpose of facilitating release of the 1 color + m image and transfer to an image receiving sheet. The undercoat layer may be an organic polymer such as a polyamide, and a more specific example is an N-methoxymethyl compound of a cocondensate of caprolactam, adipic acid, hexamethylene diamine, and lauryllactam. Other examples include polyvinyl alcohol, polystyrene, polyvinyl acetate, polyacrylates, copolymers of polymethyl methacrylate and acrylates, copolymers of methyl methacrylate and vinyl acetate, polyvinyl chloride, polyvinyl chloride and vinyl acetate. copolymers, polyvinyl butyral, etc.

A single layer of organic polymer may be provided as an image-receiving layer on the surface of the temporary image-receiving sheet for the purpose of facilitating transfer or re-transfer. Tokuko Sho μA-1 is the material and structure of this organic polymer layer! ;3 Yu6, Special Public Akihiro? -lAAl
1 JP-A Akihiro Ku μlrJθ, JP-A Akihiro 'At-9,? ,?
, Japanese Patent Application Publication No. 1987-5i-riol.

Those described in Japanese Unexamined Patent Publication No. 39-99/eO etc. can be used.

The organic polymer is preferably an organic polymer substance having a softening point of about 00C or less according to the Vicat method (specifically, the polymer softening point measurement method according to the American Testing Method for Materials ASTM D/Co3S), more preferably t, Below o0c,
More preferably, it is ro0c or less.

Specific examples of softening points of about to'C or less include polyolefins such as polyethylene and polypropylene. Ethylene copolymers such as ethylene and vinyl acetate, and ethylene and acrylic ester. PVC. Vinyl chloride copolymers such as vinyl chloride and vinyl acetate. Polyvinylidene chloride. Vinylidene chloride copolymer. polystyrene. Styrene copolymers such as styrene and (meth)acrylic acid esters. polyvinyltoluene. Copolymerization of vinyltoluene and (meth)acrylic acid ester. Poly(meth)acrylic acid ester.

A copolymer of butyl (meth)acrylate and (meth)acrylic ester such as vinyl acetate. Vinyl acetate copolymer nylon, copolymer nylon, N-alco [in polyamide resins such as dimethylated nylon,
It is preferable that at least one material is selected from organic polymeric substances such as synthetic rubber and chlorinated rubber.
: It is also possible to substantially lower the softening point by adding various kinds of plasticizers that are compatible with the organic polymer materials. Furthermore, the softening point is t o '
By adding a sizing agent that is compatible with organic polymeric substances of C or higher, it is possible to substantially lower the softening point to below tO°C.

How to create a colored image on a temporary support by exposing, developing, and dyeing a photoresist? -9774Z
It is also possible to refer to the method for producing a photosensitive resin sheet described in Section O.

A photosensitive resin sheet is a sheet in which a layer containing a photosensitive resin is provided on a temporary support.

As the red, blue, and green coloring materials, 11 coloring materials are appropriately selected and used. For example, Dye Handbook (published by Maruzen Co., Ltd. in 9'10), 1 Color Material Engineering Book (Breakfast Bookstore, published in 1917), Latest Pigment Handbook (published by Japan Pigment Technology Association @tqqtr), and JP-A-5R-IZSQθ3.
Select from among those described in , etc., taking into consideration stability to liquid crystals, color reproducibility, desired hue, heat resistance, etc.

The materials used for the photosensitive resin layer include a mixture of gelatin and potassium dichromate (K2Cr2O7);
Alternatively, a photosensitive resin having a diazo group or an azide group as a photosensitive group may be used. Casein, polyvinyl alcohol and other water-soluble polymers can be used as substitutes for gelatin.
Ammonium dichromate is an alternative to potassium dichromate.

In the materials used in the materials and methods of the present invention, the layer of photosensitive resin composition remaining after development.

It has the function of forming an image by dyeing together with an underlying peelable layer and an optionally provided adhesive layer.

After imagewise exposure of the layer of the photosensitive resin composition that can be developed with the aqueous developer used in the present invention, either the unexposed area or the exposed area is dissolved or swelled by the aqueous developer described below. It has the property of being softened and removed (by rubbing lightly with a brush or cotton pad, etc., if necessary). Examples of such photosensitive resin compositions include Japanese Patent Publication No. 3G-11343, U.S. Patent No. 17A-033, U.S. Pat.
t ~ Kodada Page (/967) A, R.

A photosensitive resin composition containing a diazonium salt and a paraformaldehyde condensation product described in the paper by Materazzi, etc., Japanese Patent Publication No. Shoj7-jAJt.

Special Public Showa 4!3-stuOJ issue, Special Public Showu! r-96IO
Photosensitive resin compositions containing ortho-quinone diazides (or ortho-diazo oxides) described in the specifications, etc. of the Japanese Patent Publication No. 740-2t't99, Japanese Patent Publication No. 740-2t't99, Japanese Patent Publication No.
-A photosensitive resin composition containing an alkali-soluble azide polymer described in British Patent Nos. GA, YRT, TI, etc.

Special public Akihiro tI/-7ioo, special public Akihirohiro-2g7! No., U.S. Patent No. J, A? J, fJA issue, Tokuko Shogu! A photosensitive resin composition containing an azide compound that can be developed with water or an alkaline aqueous solution as described in the specifications of the Photographic Science
F, W, H from and Engineering J, Volume A, page after page (196 years).

Mueller, H., Evans, E., C.
Photopolymerizable photosensitive resin composition containing acrylamide described in the paper by erwonka, Japanese Patent Publication No. 33-3ψ
Ko No.

Tokko Akira: I! -g'19! No., special public show 3g-/uOAS
No., Tokuko Sho J! f-/Al Hiro No. 1% Kosho 36-4! l
lJ, special public Sho 3A-/Aσ71, special public Sho 3 Ku13
No. 06, Special Public Show 3 Ku1/gA & No. 7.

Tokuko Akira Jg-/! g/117 No. 39-///ko No. 0-4104, No. 4? KimiakiuO-/ko10
4. Photopolymerizable photosensitive resin compositions containing diacrylates as described in each specification etc., Directive) 1
・8"-""9-knock I"011"6[1 Intererythrieol triacrylate ester
Photopolymerizable photosensitive resin composition containing 5, Tokuko Sho U4
-1A, a photopolymerizable photosensitive resin composition containing a methacrylate ester as described in Ida No. 0 specification, etc.;
To Tokukai fi@ni/-! 1110 “Details” 2
Description pot 1 ", ]: has a carboxyl group in the side chain, and also has a double bond
Photopolymerizable photosensitive resin composition containing a polymer having il;
No. 1) Cn6g listed in the specification) IT
,.

Photopolymerizable photosensitive resin composition containing acrylic acid, Directive
ii: Side chain described in the specification of Shottt-atos: □“:n′?teii*7 i
'a''+-zz''''-, =*'ay, □Photocrosslinkable photosensitivity containing a compound having a 1-ionized methyl group
□1 Resin composition, by J. Kosar [Light
-8ens it iv. Systems J (
John Wiley 1) and 5on
S Corporation, New York, published iv6), Takahiro Tsunoda, "Photosensitive Resin" (Printing Society Publishing Department, published 1q'ya)
“Photopolymers: Pr1ncipl
es, Processe+s and Materi
alsJ (Regfonal Technica
lConference of 5ociety
of Plastics Engineers, I
nc.

B11enville, New York, /?
7. Issued in 7 years / Issued in 9tA), M, G
, “Plastic Printi” by Halpern.
ng Plates Manufacture and
TechnologyJ (Noyes Data C
organization, / Published in 1991, Park
Other photosensitive resin compositions may be mentioned, such as those described in the US Pat.

The layer thickness of the photosensitive resin layer is generally in the range of 0.0/-10 μm, preferably in the range of 0.03 to 6 μm.

For details on the materials of these photosensitive resin layers and their formation methods, please see, for example, Tokko Sho@A-/! J Coro issue, 4! Kimiaki &&-3Ar1g- issue, JP-A Showsu 7-qigso issue,
Tokukai Showa 4! j-9J3J number, Tokukai Sho @9-1iltI
No., Tokukai Akira! r/-! No. 110/, JP-A-59-9RI1
Those described in various publications such as No. 149 can also be used.

Furthermore, a legal framework can be provided. What is the retention layer?

For example, polyvinyl alcohol, polyvinyl acetate, methyl vinyl ether and maleic anhydride copolymer.

It can be formed by applying and drying a solution of a polymeric substance such as polyvinylpyrrolidone, gelatin, or gum arabic.

Blocking resistance on the back side of the photosensitive resin sheet.

It is also possible to provide a pack layer containing acetyl heptalulose, a matting agent, etc. for the purpose of preventing yellowing.

The present invention will be explained below with reference to Examples.

[Example 1] Create a transferable image according to the flat head below.

First, a solution having the following composition was prepared as a coating solution for forming an undercoat layer.

This coating solution was applied onto a polyethylene terephthalate film (thickness: 100 μm) as a temporary support. The coating was applied evenly and dried to provide an undercoat layer having a dry film thickness of 0.1 μm.

A photosensitive solution having the following composition was coated on a temporary support provided with an undercoat layer and dried to provide a photosensitive resin m'v having a dry film thickness of 0.5 μm.

Three photosensitive resin sheets with photosensitive liquid were superimposed on a matrix-like exposure mask having different pattern positions, and image exposure was performed from a distance of rocIn using a Kw ultra-high pressure mercury lamp.

The exposed photosensitive resin sheet was developed using a developer with the following composition at a temperature of 7z'Co for io to 0 seconds, and then dyed red, blue, and green to create matrix-like images with different temporary supports. A sheet was obtained to be carried on the body.

As the dye, Eriosin Scarlet R, E, etc., manufactured by Nippon Ciba Geigy Co., Ltd. was used, and the test was carried out under conditions of to'cto minutes.

On the other hand, an image-receiving sheet material was manufactured as follows.

Polyethylene terephthalate film (thickness: 100μ
M) was prepared, and Coating Ronin and B having the following compositions were sequentially applied onto the film to produce an image-receiving sheet material having a two-layer structure with a dry film thickness of 0μ and /μ, respectively.

Next, first, a temporary support having a red (R) image was placed on #J
After superimposing the image-receiving sheet on the image-receiving sheet so that the image side is in contact with the image-receiving layer of the image-receiving sheet, pressure is applied using a laminator (First Laminator 5B-sho-go, manufactured by Taisei Shoji ■).
Pearl, roller heated to 120°C, laminator speed q
Lamination was performed under the condition of oowx 1 minute. Only the temporary support of the image sheet was peeled off from the undercoat layer, and a red (R) image was transferred onto the image-receiving sheet. Next, a temporary support having a blue (B) image is superimposed on this image-receiving sheet, and the blue image is accurately aligned so that the red image is adjacent to the blue image, and after being fixed using register pins, it is placed in a laminator. A green image was transferred in the same manner as above. In the next step, green is transferred in the same way, and the three-color image g! A sheet having the following properties was obtained.

Next, the sheet having the three-color image thus obtained was superimposed on a polarizing film 6 Varilite manufactured by Royal Electric Co., Ltd., and then laminated under the same conditions as above.

Next, by peeling off this temporary image receiving sheet and the polarizing film,
, B and G were transferred to the pattern shown in Figure 185 to obtain a polarizing film with a cuff filter as shown in Figure 185.

Example In Example 1, a mixture of photosensitive dichromic acid and polyvinyl alcohol was prepared as a photosensitive solution.

Each so that the dry film thickness is 0.5μ? : Coated, photosensitive a
A T fat sheet was produced.

In the same manner as in Example 1, transferable images of 1 flag color, F color, and green were created by exposure, development, and dyeing using a matrix-like exposure mask, and then, in the same manner as in Example 1, they were transferred to a temporary image-receiving sheet. I did it. The sheet with the three-color image obtained in this way was laminated with a polarizing film "1 Varilite" manufactured by Royal Electric Co., Ltd. and then laminated. By peeling off this temporary image receiving sheet and the polarizing film, the red A polarizing film with a color filter to which a blue and green matrix image was transferred was obtained.

Example 3 A color filter was obtained by using a polyethylene terephthalate film having a thickness of about 10θμ in place of the polarizing film in Example 1.

Example 1 In Example 1, a transparent electrode was provided instead of the polarizing film.
Liquor 5) 7 (, V Monument Baso 0 Den 1
A color filter was made by transferring an image to the opposite side of the pole.

i: Example
:1 Coating liquids A and B having the following compositions were each coated with θ.
μm and / , ! r it m(D*i (-)IRE
'nee(j4"lt, Myoj: [[!t,,
”,.,Ei.jll.

Next, the temporary supports carrying the red (R) matrix image obtained in Example 1 were stacked together so that the image side was in contact with the image-receiving layer of the polarizing film, and then laminated using a laminator. . Only the support of the color sheet was peeled off from the release layer, and a red (R) image was transferred onto the polarizing film. Next, the same operation was performed for blue and green to obtain a polarizing film provided with color filters for three-color images in a matrix.

Example 6 Example! A transparent electrode with a color filter was prepared by using a polyimide film provided with a transparent electrode instead of a polarizing film and transferring an image to the opposite side of the electrode.

Examples In Example S, the thickness is l instead of the polarizing film.

A color filter was created using the glass plate shown in ①.

The color filters obtained in Examples 1 to 7 were capable of forming fine patterns, and accurate pattern alignment was possible. Further, even when these color filters were left in air for 1 hour at OoC, no change in the spectra was observed.

[Brief explanation of the drawings] Figure 1 is a cross-sectional view of a photosensitive resin sheet for obtaining a transferable image. Figure 1 shows the photosensitive resin sheet being overlapped with a matrix-shaped exposure mask for image exposure. FIG. 3 is a cross-sectional view of a sheet in which a transferable image is carried on a temporary support after development processing; FIG. 3 is a cross-sectional view of a sheet with an image transferred onto a temporary image-receiving sheet; FIG. A cross-sectional view of a color filter. FIG. 3 shows a pattern of colored images in matrix form, where B indicates blue, 几 indicates red, and G indicates green. l Temporary support, 1 Undercoat layer 3 Photosensitive resin layer Protective layer! Colored image pattern 6 Temporary image-receiving sheet support Image-receiving layer l Eyelet g Image-receiving layer 1st layer 9 Colored image pattern 10 Colored image number turn// Transparent support with polarizing film, transparent support, or transparent electrode patented People Fuji Photo Film Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A colored image obtained by exposing, developing, and dyeing a photosensitive resin layer provided on a temporary support is transferred to a temporary image-receiving sheet, and then this colored image is substantially transferred to a temporary image-receiving sheet. A method for producing a color filter, characterized by transferring it to a transparent final support. 2. A method for producing a color filter, which comprises transferring a colored image obtained by exposing, developing and dyeing a photosensitive resin layer provided on a temporary support to a substantially transparent final support. 3. The method for producing a color filter according to claims 1 and 2, wherein the photosensitive resin layer is a layer that can be developed with water or alkali. 4. The above dyeing process uses red, green, and blue coloring materials to obtain red, green, and blue colored images on different temporary supports, respectively, and these three types of colored images are A method for manufacturing a color filter according to claims 1, 2, and 3, characterized in that the color filters are transferred to the same temporary image-receiving sheet or the same final support. 5. The method for producing a color filter according to claims 1, 2, 3, and 4, wherein the substantially transparent final support is a polarizing film. 6. The color according to claims 1, 2, 3 and 4, wherein the substantially transparent final support is a transparent support provided with a transparent electrode. How to manufacture filters.