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:
Oct. 25, 1994
Filed:
Mar. 24, 1993
Applicant:
Inventor:
David B James, Newark, DE (US);
Assignee:
AMP-Akzo Corporation, Newark, DE (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; H05K / ;
U.S. Cl.
CPC ...
430271 ; 430311 ; 430313 ; 430327 ; 427 98 ;
Abstract
The adhesion of epoxy-resin containing resist compositions to a copper surface, which resist compositions are exposed to actinic radiation, developed and hardened, is enhanced by contacting the copper surface with an N-heterocyclic compound comprising --NH.sub.2 groups and drying the copper surface comprising the N-heterocyclic compound prior to application of the resist. Printed wiring boards produced by a partially additive process can be produced using this adhesion enhancement technique.