Color filter manufacturing method

Abstract

Abstract PURPOSE:To obtain a filter with superior dyeability while easily controlling the thickness by coating an aqueous photosensitive liq. contg. low molecular gelatin obtd. by decomposing high molecular gelatin on a substrate and by subjecting the resulting film to imagewise exposure, development, burning and coloring with an acid dye. CONSTITUTION:A photosensitive liq. is prepd. by adding a photopolymn. initiator such as ammonium dichromate and an auxiliary such as alcohol, chrome alum or balsamic tincture to an aqueous soln. of gelatin with 5,000-70,000 average mol. wt. obtd. by thermally decomposing acid-treated high molecular gelatin. The photosensitive liq. is coated on a glass substrate and prebaked. The resulting film is exposed to ultraviolet rays through a photomask, and it is devloped with cold water, burned at about 150 deg.C, and dyed with an acid dye. The development is finished within about 3min. Since the photosensitive liq. does not gel at room temp., the thickness of the film is easily controlled, and much residual NH2 in the gelatin facilitates the dyeing of the film, so a color filter giving a fine pattern with high reproducibility is obtd. with high productivity.

Inventors

• 👤 Kazufumi Ogawa
• 👤 一文 小川

Bibliographic Details