The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1997
Filed:
Jun. 13, 1995
Hiroyoshi Omika, Yokohama, JP;
Yutaka Otsuki, Yokohama, JP;
Hitoshi Yuasa, Yokohama, JP;
Eiji Yoda, Yokohama, JP;
Toru Nakamura, Yokohama, JP;
Masayuki Ando, Kashiwa, JP;
Teruhisa Kuroki, Kawasaki, JP;
Norikatsu Ono, Narashino, JP;
Nippon Oil Co., Ltd., Minato-ku, JP;
Dai Nippon Printing Co., Ltd., Shinjuki-ku, JP;
Abstract
A method for producing a color filter involves (a) forming a positive photosensitive coating film on a transparent electrically conductive layer of a transparent substrate; (b) forming a light-irradiated region where a light irradiation amount is different in two steps; (c) developing a larger light-irradiated portion to lay-open the transparent electrically conductive layer followed by electrodepositing a light shielding layer thereon; (d) forming on the positive photosensitive coating film undeveloped in the step (c) a light-irradiated region where a light irradiation amount is different in two steps; (e) developing a larger light-irradiated portion of the photosensitive coating film to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon; (f) forming on the positive photosensitive coating film undeveloped in the step (e) a light-irradiated region where a light irradiation amount is different in at least three steps; and (g) developing the photosensitive coating film to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon, operation of the developing and electrodepositing being sequentially repeated at least twice in decreasing light irradiation amounts.