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. 31, 1999
Filed:
May. 06, 1997
Mehmet N Gungor, Pittsburgh, PA (US);
J Donald Gardner, Jr, Columbia, MD (US);
William R Larimer, Baltimore, MD (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A substrate carrier for a ceramic substrate which supports one or more high power semiconductor devices which is fabricated from a metal base composite and which includes strategically located high conductivity copper based inserts to provide an effective heat transfer path to a heat sink for high power electronic devices. The coefficient of thermal expansion of both the metal based composite and the copper based inserts substantially match that of the substrate. The substrate carrier is formed by a pressure casting process where a porous preform of SiC, for example, is infiltrated with molten aluminum.