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. 07, 1999
Filed:
Jul. 07, 1998
Applicant:
Inventors:
Hiroshi Umehara, Tokorozawa, JP;
Takateru Asano, Tokyo, JP;
Assignee:
Fuji Chemicals Industrial Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F / ; G03F / ;
U.S. Cl.
CPC ...
4302701 ; 430197 ; 4302891 ;
Abstract
A water-soluble photoresist composition is provided which comprises a water-soluble photosensitive composition containing a casein component and a water-soluble photosensitive agent and at least one calcium salt of an organic acid. The photoresist composition has excellent sensitivity, resolution, and etching resistance and can be used for the production of highly refined electronic components such as shadow masks, lead frame, etc.