Color filter

Details Color filter Color filter

1991-08-05

1993-01-05

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Screen other than for cathode-ray tube

430321, 430 13, 430 14, 430 15, G03F 900

Patent

active

051769719

ABSTRACT:
A technique related to color filters to be arranged on the light-receiving surface of a color liquid crystal display device, color video camera, and the like. The color filter consists of a substrate (10) and a colored filter layer (12) formed thereon. The colored filter layer (12) comprises, for example, three groups of filter picture elements (14R), 14G, 14B) having spectral characteristics respectively corresponding to red, green and blue. Each group of filter picture elements are made of polyimide resin and dye contained therein. Further, each group of the filter picture elements (R, G, B) are arranged in direct contact with one surface of the substrate (10) without using any intermediate protecting film. The first group of filter picture elements patterned on one surface of the substrate (10) are subjected to heat treatment at a high temperature of about 250.degree. C., for example, to increase their resistance against the solvent. Then, a second coating layer for patterning the second group of filter picture elements is directly formed without using any intermediate protecting film.

REFERENCES:
patent: 4876165 (1989-10-01), Brewer et al.

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