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. 17, 1996
Filed:
Dec. 07, 1994
Applicant:
Inventors:
Assignee:
Digital Equipment Corporation, Maynard, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
361687 ; 361704 ; 361719 ;
Abstract
A heat dissipating arrangement in a portable computer uses a copper slug disposed between a heat-generating central processing unit (CPU) chip and the underside of a metallic keyboard baseplate. The slug also extends through a copper-plated hole in a printed circuit (PC) board, and is either soldered to the copper plating or press-fit into the hole to enhance heat transfer between the slug and the PC board. Small through-holes extend through the PC board and the copper plating next to the opening. These through-holes connect the copper plating to several layers of etch within the PC board, so that these layers act like fins on a heat sink to increase heat transfer away from the CPU.