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:
Dec. 02, 2003
Filed:
Oct. 13, 2000
Applicant:
Inventors:
Lenora Toscano, Waterbury, CT (US);
Raymond Letize, West Haven, CT (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B 1/300 ; C23F 1/00 ; B44C 1/22 ;
U.S. Cl.
CPC ...
H01B 1/300 ; C23F 1/00 ; B44C 1/22 ;
Abstract
A process for the manufacture of printed circuit boards is disclosed wherein a plated silver deposit is used both as an etch resist and as a final finish for enhancing the solderability of the copper circuits. An aqueous alkaline etchant which is free of halide ions is proposed as being particularly compatible with the silver etch resist/final finish.