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:
Jan. 31, 1989
Filed:
Apr. 13, 1987
Applicant:
Inventors:
Shigeru Koibuchi, Hitachi, JP;
Asao Isobe, Hitachi, JP;
Daisuke Makino, Mito, JP;
Yutaka Takeda, Ome, JP;
Assignees:
Hitachi Chemical Company Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430331 ; 252156 ; 252528 ; 252529 ; 252541 ; 252547 ; 252548 ; 430301 ; 430326 ;
Abstract
A developing solution comprising at least two compounds selected from choline and quaternary ammonium salts is suitable for developing a negative-type photosensitive resin composition with exposure to a smaller light amount.