Patent ID: 7462886

Claim:
A semiconductor device comprising: a metal substrate, an insulation plate on both surfaces of which are provided with a first metal film and a second metal film, respectively, wherein the first metal film is soldered directly on a surface of the metal substrate, the semiconductor device further comprising: at least one bipolar switching element which is provided on the surface of the metal substrate and has at least four semiconductor layers made of an n-type wide-gap semiconductor layer and a p-type wide-gap semiconductor layer, and at least one diode element which is provided on the second metal film and has at least an n-type wide gap semiconductor layer, wherein a main electrode of low electric potential side adjacent to the n-type wide-gap semiconductor layer of the bipolar switching element is soldered directly on the surface of the metal substrate, while a main electrode of high electric potential side adjacent to the p-type wide-gap semiconductor layer of the bipolar switching element is electrically connected to the second metal film via a wire, and a main electrode of low electric potential side adjacent to the n-type wide-gap semiconductor layer of the diode element is soldered directly on the second metal film, while a main electrode of high electric potential side of the diode element is electrically connected to the surface of the metal substrate via a wire, thereby the bipolar switching element and the diode element are connected in reverse parallel to each other.