JPS61228401A - Preparation of color filter substrate - Google Patents

Abstract

PURPOSE:To obtain the color filter substrate having an initial color characteristics without exposing the color film to a high temperature by forming a color filter layer and its protective layer on a transparent insulating substrate, by adhering a transparent film forming a transparent electroconductive film on the protective film. CONSTITUTION:The color filter layer 2 and its protective layer 3 are formed on the transparent insulating substrate 1. While, the transparent electroconductive film 4 of indium oxide is formed on a polyester film 5. The color filter substrate is formed by sticking the film 5 formed the transparent electroconductive film 4 on the protective film 3 provided on the substrate with an adhesives. The color filter substrate formed as mentioned above, has the initial color characteristics of the color filter without generating a discloring, as the color filter layer 2 does not become to a high temperature, and a gelatin layer forming the color filter layer does not become to a black color due to burning.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a color filter substrate.

[Conventional technology]

The general configuration of a conventional color filter substrate is shown in the sectional view of FIG. In the figure, (1) is a transparent insulating substrate such as quartz or glass, (2) is a color filter layer, and (3) is a protective film for color filter layer (2). Fuji Yakuhin ■) was used. (4) is a transparent conductive film formed of indium oxide or the like. This conventional color filter substrate is a transparent insulating substrate. In this case, a color filter layer (2) and its protective film (3) are formed on a glass substrate (1), and a transparent conductive film (4) is formed by vapor-depositing indium oxide. is formed and manufactured.

FIG. 8 is a cross-sectional view showing the steps for forming a general color filter layer (2) in order of process. First, photosensitive gelatin was applied onto a glass substrate (1) using a spinner to form a gelatin layer (6). (No. 8 Innoshima). Vistaron (trade name, Nitta Gelatin) was used as the photosensitive gelatin. Next, a mask is applied, exposed and developed to form a gelatin layer (6a) in the desired pattern (Fig. 8b).The gelatin is stained with a green dye solution (dye, water, acetic acid), and a green color filter layer is formed. (2
&) is obtained (Figure 8C). Furthermore, cover the green color filter layer (2a) by applying a thin protective film (8a), and then apply a gelatin layer (6) (Fig. 8d). Figure 8e) The gelatin layer (6b) is stained with a red staining solution to form a red color filter layer (2b). A blue color filter layer (2C) is formed in the same manner as above, and three color filter layers of green, red, and blue are formed (8th
Figure h). As mentioned above, various colors can be displayed by dyeing gelatin with green, red, and blue dyes.

[Problem that the invention seeks to solve]

According to the conventional method, when a transparent conductive film (4) made of indium oxide or the like is formed on a protective film (3) on a color filter layer (2), the substrate temperature becomes as high as 800° C. or more.

The color filter layer (2) is made of gelatin,
Since gelatin burns and turns black at temperatures above 200°C, there is a problem in that the color filter layer changes color.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a color filter substrate that can maintain initial color characteristics.

[Means for solving problems]

The method for manufacturing a color filter substrate of the present invention is to form a color filter layer and its protective film on a transparent insulating substrate, and adhere a transparent filter on which a transparent conductive film is formed onto the protective film.

[Effect]

In this invention, since a color filter substrate is manufactured by bonding a transparent film on which a transparent conductive film is formed in advance onto a color filter on a transparent insulating substrate, the color filter layer does not reach a high temperature. Since the gelatin forming the color filter does not burn and become black, discoloration of the color filter is prevented, and a color filter substrate having the initial color characteristics of the color filter can be obtained.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the sectional view of FIG.

In the figure, (5) is a transparent conductive film such as indium oxide (
4) is a transparent film made of polyester, polyethersulfone, polysulfone, etc.

First, a color filter layer (2) and its protective film (3) are formed on a transparent insulating substrate, in this case a glass substrate (1). On the other hand, a transparent conductive film (4) of indium oxide is formed on the ester film (5), and the film (5) on which this transparent conductive film (4) is formed is placed on the protective film (3) of the substrate. , and was attached with an adhesive to form a color filter substrate.

The adhesive used is epoxy resin adhesive (Sumitomo 8M
Sales, trade name: Scotchweld 2216) polyamide resin adhesives, etc.

In the color filter substrate formed in this way, the color filter layer (2) does not reach high temperatures, so the gelatin forming the color filter layer does not burn and turn black, so the color of the initial color filter is maintained without discoloration. It had certain characteristics.

In the above embodiment, a glass substrate was used as the transparent insulating substrate, but the same effect can be obtained even if a plastic film such as polyester, polysulfone, polyethersulfone, etc. is used.

〔Effect of the invention〕

As described above, according to the present invention, by forming a color filter layer and its protective film on a transparent insulating substrate and adhering a transparent film in which a transparent conductive film is formed on the protective film,
Since the color filters are not exposed to high temperatures, the color filters do not discolor, and a color filter substrate having initial color characteristics can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a color filter substrate obtained according to an embodiment of the present invention, FIG. 2 is a sectional view showing a conventional color filter substrate, and FIG. 8 is a sectional view showing a general color filter layer forming process. It is sectional drawing shown in order of a process. In the figure, (1) is a transparent insulating substrate, (2) is a color filter layer, (3) is a protective film, (4) is a transparent conductive film, and (5) is a transparent insulating substrate.
) is a transparent film. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A method for manufacturing a color filter substrate, which comprises forming a color filter layer and its protective film on a transparent insulating substrate, and adhering a transparent film on which a transparent conductive film is formed onto the protective film.