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:
Aug. 20, 1991
Filed:
Oct. 10, 1990
Joseph M Ilardi, Sparta, NJ (US);
Bernard P Gollomp, West Lawrence, NY (US);
Bruce E Kurtz, Lebanon, NJ (US);
Allied-Signal Inc., Morris Township, Morris County, NJ (US);
Abstract
The invention relates to an improvement in dielectric type printed circuit boards having wells for mounting active circuit components on a metal substrate for heat dissipation. The improvement resides in a hermetic seal for the printed circuit board which includes a lid hermetically sealed to the top surface of the circuit board, as well as a chemically vapor deposited coating on the dielectric around the active components to prevent seepage of water and oxyen through the lid edges and into the well regions which would otherwise be detrimental to the active components.