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. 03, 1991
Filed:
Mar. 12, 1990
Applicant:
Inventors:
Diane L Adams, Lancaster, PA (US);
Wendell A Ehrhart, Red Lion, PA (US);
Donald Jones, Leola, PA (US);
Assignee:
Armstrong World Industries, Inc., Lancaster, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03F / ;
U.S. Cl.
CPC ...
430288 ; 430325 ; 522 39 ; 522 42 ; 522 44 ; 522 46 ; 522 53 ; 522 63 ; 524533 ; 524534 ;
Abstract
An aqueous photopolymer composition is produced by adding a monomer to a latex of a partially neutralized carboxylated acrylic copolymer, having an acid number greater than 80, along with photoinitator and components to produce an aqueous coatable and alkali developable photoresist composition. Preferred neutralization is 30-50% for dip-coating and 40-60% for screen-printing to produce 1 mil lines and 1 mil space after ultraviolet exposure and mild alkali development.