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. 28, 1982
Filed:
Jan. 04, 1982
Applicant:
Inventors:
Daniel J Shanefield, Princeton Township, Mercer County, NJ (US);
Fred W Verdi, Lawrence Township, Mercer County, NJ (US);
Assignee:
Western Electric Company, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
156643 ; 279852 ; 134-1 ; 156645 ; 156656 ; 1566591 ; 156901 ; 204 15 ; 204 / ; 2041 / ; 427 97 ; 427250 ; 427307 ; 427328 ; 430313 ; 430318 ;
Abstract
A printed circuit board is made from a substrate having a copper clad layer thereon by means of first providing spaced through-holes through the substrate, mechanically scrubbing the surface of the substrate and then sputter etching the surface of the substrate so as to remove at least 50A. thereof from the surface and then vacuum metallizing the through-holes subsequent to sputter etching without breaking the vacuum and then finally forming a circuit pattern on the substrate by usual subtractive techniques.