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:
May. 23, 1989
Filed:
Jul. 30, 1987
Applicant:
Inventors:
Philip D Knudsen, South Berwick, ME (US);
Daniel P Walsh, Peabody, MA (US);
Assignee:
Polyonics Corporation, Newburyport, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; B05D / ;
U.S. Cl.
CPC ...
204 22 ; 204 30 ; 204 384 ; 427306 ; 427307 ;
Abstract
At least one surface of a polyimide sheet surface is coated with copper in the absence of an adhesive. The polyimide surface is treated with a one phase aqueous solution comprising an alkylene diamine; an alkali metal hydroxide and a water miscible alcohol to render the surface uniformly and substantially completely textured. The treated surface then is treated with a catalyst, coated with cobalt or nickel and then coated with copper. The laminate produced passes the IPC tests for peel strength and solder float.