Patent ID: 7122890
Filing Date: 2006-10-17
Classification: H01L,H02M

Abstract:
1. A power module comprising: at least one power semiconductor switch; a housing element including an opening at one major side thereof; a lead frame including at least one external lead provided for external connection outside said housing element and a conductive pad integrally connected to said external lead and disposed inside said housing element, said conductive pad having a first open surface area large enough to receive said at least one power semiconductor switch and a second open surface opposite said first open surface exposed through said opening in said housing element, a plurality of isolated conductive pads in addition to said at least one conductive pad each integrally connected to a respective external lead extending to the exterior of said housing element, said plurality of isolated conductive pads being arranged opposite to said at least one conductive pad and having disposed on one major surface thereof at least a power semiconductor switch; a heat sink; and a thermally conductive but electrically insulating material interposed between and in direct contact with said second open surface of said at least one conductive pad and said heat sink, whereby heat generated by said semiconductor switches travels through said conductive pads and said thermally conductive and electrically insulating material and is dissipated by said heat sink.