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:
Oct. 28, 1986
Filed:
Dec. 23, 1985
Applicant:
Inventor:
Joseph L Horvath, Poughkeepsie, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 81 ; 357 82 ; 357 68 ; 357 65 ;
Abstract
A unitary heat sink for a semiconductor package having a plurality of cooling fin elements, each element having upwardly extending openings that divide the base into a plurality of leg portions, the heat sink having a plurality of flat base portions individually bonded to a surface of the package, each of the leg portions of an individual fin element being integral with different but adjacent flat base portions, in operation the heat sink preventing a build-up of stresses at the bonded interface of the base portions and package due to differential coefficient of expansions of the heat sink and package.