JPH0454922B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a color filter used in color televisions and other color display devices.

[Prior Art] As a conventional color filter, one in which a pattern is provided by alternately adjoining colored films of two or more colors, for example, three colors of red, green, and blue, is known.
The method for manufacturing this color filter involves the steps of applying a colored film agent made by mixing a coloring agent into a photocurable resin onto a substrate, exposing it to pattern light, and developing it to form a predetermined pattern, such as red, green, etc. In the case of a three-color blue color filter, a method of repeating the process three times has been proposed (Japanese Patent Application Laid-Open No. 16407/1983).

[Problems to be Solved by the Invention] When manufacturing a color filter using the above conventional method, as shown in FIG.
After forming the color filter pattern 13 with a colored film material, a second color film material 14 is applied thereon, exposed to light, and unexposed areas are developed (first
Figure 0). At this time, in the vicinity of the part where the colored film agent 14 overlaps the color filter pattern 13 of the first color, the color filter pattern 1 of the second color is applied.
5, a protrusion 15a will be formed. Furthermore, in FIG. 11, after forming the first color filter pattern 13 and the second color filter pattern 15, a third color coloring film 16 is applied, and an exposure mask 17 is applied to expose the pattern. , if the mask alignment is misaligned, 3.
Protrusions 18 on the colored filter pattern 18
A (Fig. 12) may occur.

When such protrusions 15a and 18a are formed, the unevenness may cause wire breakage when a transparent electrode is provided on the color filter in a later process, and may cause variations in resistance value and may also disturb the orientation of the liquid crystal. . In addition, color mixing occurred at the contact portion of the two color filter patterns due to migration due to heat or the like.

[Means for solving the problem] The method for manufacturing a color filter in the present invention includes:
A coloring film agent made by adding a coloring agent to a photocurable resin is applied onto a substrate, which is pattern-exposed and then developed to form a color filter pattern.The pattern formation process is performed multiple times to correspond to each of the above pattern formation processes. and forming color filter patterns of multiple colors on the substrate, wherein the color filter patterns of the multiple colors formed in each of the pattern forming steps are formed at predetermined intervals from each other. It is characterized by

[Example] A method for manufacturing a color filter according to the present invention will be explained through the manufacturing process.

A colored film agent was obtained by adding an acid dye and ammonium dichromate as a light-sensitive hardening agent to an aqueous gelatin solution. As shown in the second figure, this colored film agent 2 was applied onto a substrate 1 such as glass and dried. Next, a mask 3 is applied to this and pattern exposure is performed (FIG. 3). Then, the non-exposed areas were eluted with a developer to create color filter pattern 4 (4th
figure). Next, apply a second coloring film agent 5 on top of it,
After drying, a mask 6 is applied to pattern exposure (FIG. 5), and development is performed to form a second color filter pattern 7 (FIG. 6). Furthermore, a third colored coloring film agent 8 was applied, dried, and exposed using a mask 9 (FIG. 7) to form a third colored color filter pattern 10 (FIG. 8). The color filter patterns 4, 7, and 10 are formed at intervals so as not to contact each other. After forming these patterns, a transparent protective film 11 is formed to flatten the surface (FIG. 1). The material of the transparent protective film 11 may be any material as long as it is transparent and is not easily stained by the dye of the color filter, and polyamide resin, polyimide resin, acrylic resin, epoxy resin, transparent photoresist, etc. can be used. let

As is clear from the above description, in order to make the color filter patterns 4, 7, and 11 non-contact with each other, the exposed holes of the masks 3, 6, and 9 are made slightly smaller. The degree is determined by considering the alignment accuracy of the mask, the viscosity of the coloring film agent, etc. For example, on top of the base color filter pattern 4,
When the colored film agent 5 is applied, as shown in FIG.
a occurs. If this part hardens and remains, protrusions will occur as mentioned above. Therefore, it is necessary to design the mask so that this inclined portion 5a is not exposed.

[Effects of the Invention] According to the present invention, color filter patterns of different colors can be manufactured without contacting each other, so that color bleeding due to migration or the like can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention, FIGS. 2 to 8 are cross-sectional views of the manufacturing process of the embodiment of the present invention, and FIGS. 9 to 12 are cross-sectional views showing conventional manufacturing processes. . 1...Substrate, 2,5,8...Coloring film agent, 4,
7,10...Color filter pattern.

Claims (1)

[Scope of Claims] 1. A pattern forming process is performed multiple times in which a colored film agent made by adding a coloring agent to a photocurable resin is applied onto a substrate, exposed in a pattern, and then developed to form a color filter pattern. In the method for manufacturing a color filter, forming color filter patterns of a plurality of colors on the substrate in accordance with each of the pattern formation steps, the color filter patterns of the plurality of colors formed in each of the pattern formation steps are arranged in a predetermined manner with respect to each other. A method for manufacturing a color filter, characterized in that it is formed at intervals.