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:
Mar. 03, 1992
Filed:
Apr. 01, 1991
Applicant:
Inventors:
Hiroshi Watanabe, Suwa, JP;
Kazuo Aoki, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G02B / ;
U.S. Cl.
CPC ...
359 68 ; 359891 ;
Abstract
A method of forming a color filter substrate having pixels of at least two different colors by use of a negative photoresist material of the last color deposited. The negative photoresist is coated over the pixels and the exposed surface of the substrate. The back of the substrate is then exposed to a light source at a wavelength blocked by the formed pixels so that any of the negative photoresist material directly on the transparent substrate is activated by the light from the light source and remaining material is removed.