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. 06, 1977
Filed:
Jul. 08, 1976
Applicant:
Inventors:
Ernst Andrascek, Munich, DT;
Hans Hadersbeck, Munich, DT;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; B44C / ;
U.S. Cl.
CPC ...
156666 ; 156651 ; 156901 ; 134-3 ; 134 41 ; 252 791 ; 252 792 ; 252 794 ; 427 96 ; 427309 ; 427327 ;
Abstract
A process is provided for improving the solderability of electric circuit boards with conductor paths composed of copper or copper alloys, in which, at least at the locations to be soldered, the conductor paths are cleansed in a first solution and are thereby deoxidized, and are then activated in a second solution.