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:
Jul. 13, 1999
Filed:
Mar. 18, 1998
Applicant:
Inventors:
Randall W Kautz, Irvine, CA (US);
Robert K Barr, Laguna Niguel, CA (US);
Assignee:
Morton International, Inc., Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; C08J / ;
U.S. Cl.
CPC ...
4302811 ; 430910 ; 430912 ; 430916 ; 430920 ; 522114 ;
Abstract
A negative-acting photoimageable composition useful as a photoresist comprises an acid-functional binder polymer, a photopolymerizable component, and a photoinitiator chemical system, in which the binder polymer has a multi-modal molecular weight distribution used to promote faster photoresist stripping times and a smaller stripped particle size. The combination of faster stripping times and smaller stripped particle size allows for fully aqueous, environmentally friendly, stripping of the photoresist from overplated circuit boards.