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. 22, 1987
Filed:
Jun. 17, 1987
Applicant:
Inventors:
David L Fletcher, Georgetown, KY (US);
Arthur E Graham, Lexington, KY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B05D / ;
U.S. Cl.
CPC ...
428204 ; 428901 ; 428209 ; 427 96 ;
Abstract
A printed circuit with an internal metal sheet for heat dissipation has a roughened aluminum sheet with via holes coated with acrylic or epoxy resin containing thixotropic fumed silicon dioxide or silicate clay. The resin and thixotropic agent are electrophoretically coated. The thixotropic agent may act both to even the coating around edges and as a material upon which metal plating of the printed circuit is bonded.