JPS6194004A - Production of color filter - Google Patents

Abstract

PURPOSE:To make possible the easy formation of a color filter having fine patterns of three primary colors at a low cost by repeating the stage for coating a UV curable resin contg. one coloring agent among the three primary colors on the surface of a substrate then exposing and developing the same to form the color filter in the prescribed position. CONSTITUTION:The UV curable resin 3 contg. the coloring agent for, for example, red, as the 1s color among the three primary colors is coated by a spinner method on the transparent substrate 1 provided with transparent electrodes 2 formed to the prescribed pattern and is baked. A photomask 4 having the pattern corresponding to the red filter is placed thereon and the coating is exposed to UV rays by using a high-pressure mercury vapor lamp. The UV curable resin contg. the coloring agent in the unexposed part is removed by an ethyl acetate or xylene solvent to form the red filter. The color filters for the other colors of the three primary colors, i.e., green and blue, are further formed by repeating the similar operation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a color filter used for full-color display.

(Prior Art and Problems) Conventionally, the manufacturing method of this type of color filter has been to produce transparent electrodes with transparent electrodes formed in a predetermined pattern without using the photolithographic process as shown in substrate(
5) Gelatin, a natural protein with a photosensitizer added on top (
Coat with a spinner, apply a photomask (8) with a predetermined pattern, and expose to ultraviolet light. After this, Figure 2 (+)
), completely remove gelatin (7) from the non-exposed areas. On the transparent substrate (5) with gelatin (strength) formed in a predetermined pattern as the next layer, a positive type 7 photoresist OI is applied with a spinner, and a photomask (9) with a predetermined pattern is applied, and the first layer is exposed to ultraviolet light. 2(c), after exposure, the unexposed portion of the fumetresist is removed to expose the gelatin portion that will become the colored layer of the first color, and the gelatin portion that will become the colored layer of the second and third color is A resist dyeing film is formed to prevent dyeing with a colored dye.Then, the exposed gelatin layer is dyed with a first color, for example, a red dye, thereby forming a red filter. (Figure 2(d)
)).

The above operations (C) to (d) are repeated to form color filters of the other three primary colors, green and blue (FIG. 2(e)).

As mentioned above, the conventional manufacturing method uses photophosphorography technology, so it is easy to form fine patterns, but resist dyeing of (C) to [d) Since the entire film forming process and dyeing process are required three times, the manufacturing cost is high and it takes a long time to form.

(Object of the invention) The present invention takes the above-mentioned drawbacks into consideration and provides
The present invention provides a method of manufacturing a color filter having a fine striped pattern or a mosaic pattern of three primary colors easily and at low cost.

(Structure of the Invention) The present invention is capable of forming red, green, and blue color filters by repeatedly performing the steps of forming a desired pattern on a surface, and then exposing and developing it to form color filters at predetermined positions. This method is characterized in that color filters are formed adjacent to each other.

Hereinafter, the present invention will be explained in detail based on examples and with reference to the drawings.

(Example) (7', ) to D in FIG. 1 are cross-sectional views of an example of the present invention.

This will be explained below with reference to FIG.

(A) On a transparent substrate (1) with transparent electrodes (2) formed in a predetermined pattern, an ultraviolet curing resin (3) containing, for example, a red colorant as the first color of the three primary colors is coated to a film thickness of approximately Apply with a spinner method to a thickness of 1.0 μm, approximately 6
Firing was performed at 0° C. for about 5 minutes.

(B) A photomask (4) with a pattern corresponding to the red filter is applied and exposed to ultraviolet light (8 ow, m x 2 seconds) using a high pressure mercury lamp.

(C) The ultraviolet curing resin containing the colorant in the non-exposed areas is removed with ethyl acetate or xylene solution to form a red filter.

(D) Repeat the operations (A) to (C) above to form color filters of other three primary colors, ie, green and blue.

In this example, the ultraviolet curable resin containing the colorant is an ultraviolet curable paint (trade name: Sonne KNP-400) using a urethane-acrylate resin as a paste resin.
0. Kansai Paint ■) was used.

As the paste resin for the above ultraviolet curing paint, epoxy
Acrylate resins and polyester resins can be used. A dye was used as the colorant. Also,
Although the color filter in this example was formed in a striped pattern, a mosaic pattern may also be used.

When a liquid crystal display element was constructed using the color filter of the present invention and full color display was performed, it was confirmed that a clear image could be obtained.

In the above embodiments, an example of use in a liquid crystal display element has been described, but it goes without saying that the method of the present invention can also be applied to other elements such as COD.

(Effects of the Invention) As shown in the examples, the present invention contains a coloring agent in advance, so there is no need for the dyeing process, which was conventionally required three times. Because there is no need for the process of forming an anti-dye coating, it can be done in a short time.
Moreover, since it uses photolithography technology, it is suitable for forming color filters with fine patterns.

Therefore, the present invention enables fine red (R), green (
G), Blue (B) This is very excellent in that it can form a three primary color filter.

[Brief explanation of drawings]

FIGS. 1(A) to 1(A) are process diagrams showing the manufacturing process of the color filter of the present invention. 1... Transparent substrate, 2... Transparent electrode, 3... Ultraviolet curing resin containing colorant,
4...Photomask FIGS. 2(a) to 2(e) are process diagrams showing the manufacturing process of a conventional color filter. 6...Transparent substrate, 6...Transparent electrode,
7...Natural protein (gelatin), 8.
9...Photomask% 10...Positive photoresist, 11...Dye. Representative friend patent attorney Susumu Uchiteru 71 Fig.

Claims (1)

[Claims] on the substrate surface on which the desired pattern is formed;
By repeating the process of applying an ultraviolet curable resin containing a coloring agent of one of the three primary colors red, green, and blue, and then exposing and developing it to form a color filter on a predetermined pattern, red and green are produced. , a method for manufacturing a color filter, characterized in that each color filter of blue is formed adjacent to each other.