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:
Aug. 27, 2002
Filed:
Oct. 03, 2000
Applicant:
Inventor:
Eric Yakobson, Aliso Viejo, CA (US);
Assignee:
Alpha Metals, Inc., Jersey City, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F 7/42 ;
U.S. Cl.
CPC ...
G03F 7/42 ;
Abstract
A process for removing patterned negative working resist from the surface of a substrate during manufacture of printed wiring boards is disclosed. The process includes the steps of contacting the patterned resist with a stripping solution containing an alkalinity source as well as a source of ammonium ions. The stripping solution is characterized in that it does not contain volatile organic compounds (VOCs).