Patent ID: 8222729
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. An electric power converter comprising: a heat sink having a heat receiving surface; a semiconductor module including a metal plate, a switching element and a resin member, wherein the metal plate has a heat radiation surface facing the heat receiving surface, the switching element is disposed on a surface of the metal plate opposite to the heat radiation surface and generates heat when the switching element functions, and the resin member covers at least a part of the switching element and a part of the metal plate; and a heat radiation member having a sheet shape and disposed between the heat receiving surface of the heat sink and the semiconductor module for transmitting the heat of the switching element to the heat receiving surface via the metal plate, wherein one of the heat receiving surface and the heat radiation surface includes a concavity, which is concaved to a side opposite to the other one of the heat receiving surface and the heat radiation surface, wherein the other one of the heat receiving surface and the heat radiation surface includes a convexity at a position corresponding to the concavity, wherein the convexity has a shape corresponding to the concavity, and protrudes to the side opposite to the other one of the heat receiving surface and the heat radiation surface, wherein the heat radiation member has a predetermined area corresponding to the concavity and the convexity, and wherein the predetermined area of the heat radiation member is sandwiched between the concavity and the convexity.