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:
Nov. 19, 2013
Filed:
Jul. 31, 2012
Nathan Zommer, Fort Lauderdale, FL (US);
Nathan Zommer, Fort Lauderdale, FL (US);
IXYS Corporation, Milpitas, CA (US);
Abstract
A packaged power field effect transistor device includes a power field effect transistor die, a DBA substrate, a clip, a wire bond, leads, and an amount of plastic encapsulant. The top of the DBA has a plurality of metal plate islands. A sintered silver feature is disposed on one of the islands. A silvered backside of the die is directly bonded to the sintered silver structure of the DBA. The upper surface of the die includes a first aluminum pad (a source pad) and a second aluminum pad (a gate pad). A sintered silver structure is disposed on the first aluminum pad, but there is no sintered silver structure disposed on the second aluminum pad. A high current clip is attached via soft solder to the sintered silver structure on the first aluminum pad (the source pad). A bond wire is ultrasonically welded to the second aluminum pad (gate pad).