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. 08, 1987
Filed:
Jul. 02, 1986
Applicant:
Inventor:
James F Burgess, Schenectady, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; H02B / ; H01B / ; H05K / ;
U.S. Cl.
CPC ...
428210 ; 428209 ; 428432 ; 428901 ; 361383 ; 29840 ; 174 / ;
Abstract
A circuit board assembly for supporting a leadless ceramic chip carrier for surface mounting on a printed circuit board and for reducing the thermally induced stress on solder joint connections at the carrier-to-board contacts. The board includes an inner heat sink core comprising a highly conductive plate having openings provided therein in the areas which underlie the chip carrier. The openings have inserts therein of a material which closely matches the thermal coefficient of expansion of the ceramic to thereby reduce stress of the intermediate solder joints.