JPS61240203A - Structure of color filter - Google Patents

Abstract

PURPOSE:To obtain the titled filter having a good adhesion by using a photosensitive film composed of polyvinyl alcohol to the color filter which is used an acrylic type photosensitive resin to each a coloring layer, an intermediate layer and a protective layer. CONSTITUTION:The photosensitive film 2 is formed by adding a diazo compd. to an aqueous solution of polyvinyl alcohol to form the photosensitive solution, and then by coating the obtd. photosensitive solution on a transparent substrate such as a glass substrate by using a spinner, and then by directly exposing it after drying. The color filter base material composed of the acrylic type photosensitive resin is formed and exposed by a masking exposure method, and is developed to form a color phase part 3 of the first color by drying with a dyestuff having a prescribed spectral characteristics, and is coated with the intermediate layer 4 composed of the transparent acrylic type resin having a dyeing resistance. Similarly the photosensitive layer 5 made of polyvinyl alcohol is formed to form the color phase part 6 of the second color, and then is coated with the intermediate layer 7. Further, similarly, the photosensitive film 8 made of polyvinyl alcohol is formed to form the color phase part 9 of the third color, and then is coated with the protective film 10 made of the acrylic type resin. By the step as mentioned above, the three colored filter is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a color filter and its manufacturing method.

A typical conventional color filter has a cross-sectional structure as shown in the gt diagram. Polyvinyl alcohol, greens, gelatin, acrylic resin, etc. are imparted with photosensitivity and applied uniformly onto the glass substrate 1, and only the first color hue portion 5 is photocured and developed using a mask exposure method, and the other portions are removed. . This hue portion is dyed with a dye having predetermined spectral characteristics. A transparent intermediate layer 4 is then applied. The second color hue portion 6 is also dyed using the same process to cover the intermediate layer 7. 5
The hue part 9 of the color is also dyed using the same technique,
Protected pA10 is formed. Details of the manufacturing method of this color filter are given in Japanese Patent Publication No. 56-1.5228.

However, in these color filters, the colored layer is made of acrylic photosensitive resin, and the middle layer is made of acrylic fruit tree 8'f! Although color filters using this method have stable raw material quality, can be stored for long periods of time, and have excellent dyeability, they have the problem of poor adhesion. The present invention is intended to solve these problems, and its purpose is to provide a color filter with good adhesion that uses acrylic resin for the colored layer and intermediate layer.

The uninvented color filter uses a binder between the acrylic intermediate film and the acrylic photosensitive resin that becomes the colored layer to improve the adhesion of the multilayer color filter that uses acrylic resin for the colored layer and intermediate layer. It is characterized by having a photosensitive film imparted with photosensitivity to an aqueous polyvinyl alcohol solution.

The present invention will be explained below using specific examples.

2 to 4 are sectional views showing the manufacturing process of the color filter.

Diazo is added to a polyvinyl alcohol aqueous solution, this photosensitive solution is applied onto a transparent substrate such as a glass substrate using a spinner, and after drying for 60 ClO, it is exposed by direct exposure.
form 12. Next, as shown in Fig. 2, a layer of color filter base material using acrylic photosensitive resin is formed, exposed using a mask exposure method, and developed to form the hue portion 5 of the first color, and to obtain predetermined spectral characteristics. Dye with dyes that have. Then, an intermediate layer 4 of transparent dye-resistant acrylic resin is applied. Figure 2 shows this state. Next, as shown in FIG. 5, a polyvinyl alcohol photosensitive film 5 is formed and exposed using the direct exposure method. Next, a layer of color filter base material using an acrylic photosensitive resin is formed, exposed by a mask exposure method, and developed to form a second color hue portion 6, which is dyed with a dye having predetermined spectral characteristics.

Furthermore, an intermediate layer 7 of transparent dye-resistant acrylic resin is coated. FIG. 3 shows this state. Furthermore, as shown in FIG. 4, a polyvinyl alcohol photoresist film 8 is formed and exposed using the direct exposure method. Next, a layer of a color filter base material using an acrylic photosensitive resin is formed, exposed by a mask exposure method, and developed by rolling over to form a third color hue portion 9, which is dyed with a dye having predetermined spectral characteristics. Furthermore, the protection of acrylic wood
form a10.

A five-color filter is formed through the above steps.

Note that the acrylic photosensitive resin for the hue portion was a condensate of P-diazodiphenylamine and formaldehyde, and the intermediate layer and protective film were UV-curable acrylic resins.

Further, the aqueous polyvinyl alcohol solution imparted with photosensitivity was prepared in the following proportions.

Polyvinyl alcohol: Pure water Nidiazo-10CC: 12
0 At this time, the thickness of the hue part is 0.5-1.5 μm, the thickness of the intermediate layer and protective film is 0.5-(15 μm, the thickness of the polyvinyl alcohol photosensitive film is 1003-G, 01 μm) Also, common acid dyes were used for dyeing.

As described above, according to the present invention, a color filter with good adhesion can be obtained by using a polyvinyl alcohol photosensitive film in a color filter using an acrylic photosensitive resin for the colored layer, intermediate layer, and protective film. .

Note that in the above example, the color filter layer was provided on the glass substrate. Of course, a color filter layer can also be provided on the solid-state image sensor.

[Brief explanation of the drawing]

Figure 8g1 is a main sectional view showing a conventional multilayer color filter. FIGS. 2 to 4 are cross-sectional views showing the manufacturing process of a true color filter.

Claims (1)

[Claims] In a color filter formed by laminating a colored layer on a glass substrate or a solid-state image sensor, a photosensitive material is used as a binder between an acrylic intermediate film and an acrylic photosensitive resin that becomes the colored layer, and is made by imparting photosensitivity to an aqueous polyvinyl alcohol solution. A structure of a color filter characterized by having a membrane.