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:
Jun. 18, 1996
Filed:
Dec. 09, 1994
Yutaka Otsuki, Yokohama, JP;
Hitoshi Yuasa, Yokohama, JP;
Hiroyoshi Omika, Yokohama, JP;
Masayuki Ando, Kashiwa, JP;
Nippon Oil Co., Ltd., Tokyo, JP;
Dai Nippon Printing Co., Ltd., Tokyo, 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 on the photosensitive coating film a first region where a light irradiation amount is different in two steps; (c) developing a light-irradiated portion of the first region to lay-open the transparent conductive layer followed by electrodepositing a colored coating thereon to form a colored layer; (d) forming on the remaining photosensitive coating film a second region where a light irradiation amount is different in two steps; (e) developing a light-irradiated portion of the second region to lay-open the transparent conductive layer followed by electrodepositing a colored coating thereon to form a colored layer; (f) removing the remaining photosensitive coating film not developed in the steps (c) and (e); (g) forming a positive or negative photosensitive coating film on the transparent substrate; (h) forming on the photosensitive coating film formed in the step (g) a third region where a light irradiation amount is different in at least three steps; and (i) developing the third region to lay-open the transparent conductive layer followed by electrodepositing a colored coating thereon to form a colored layer, the operation of the developing and electrodepositing being sequentially repeated in the order of decreasing or increasing light irradiation amounts to thereby form different colored layers.