| 摘要 |
PURPOSE:To obtain a color filter having superior transparency and light resistance and suitable for use in a liq. crystal display device by patternwise applying an org. pigment dispersed in a precursor of polyimide to a substrate, baking the resulting layer by heating, and repeating said stages so as to form patterns having separate colors. CONSTITUTION:A precursor of polyimide is mixed with an org. pigment such as ''C.I. Pigment Yellow 20(R)'' or ''C.I. Pigment Blue 15(R)'' and an auxiliary dispersant such as a compound represented by formula I or II to prepare a colored composition. This composition is applied to a transparent substrate 3 and dried to form a colored filter layer 13. A photoresist 14 is applied to the layer 13, exposed through a mask, and developed to form a relief of the photoresist 14. The filter layer 13 is etched through the relief as a mask, and after removing the photoresist 14, the etched layer 13 is baked by heating at 200-300 deg.C. Said stages are repeated so as to form patterns having separate colors. Thus, the desired color filter 4 is obtd. |
