Patent ID: 7157785
Filing Date: 2007-01-02
Classification: H01L,H02M

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a drift region of a first conductivity type in the semiconductor substrate; base regions of a second conductivity type formed selectively in the surface portion of the drift region; one or more emitter regions of the first conductivity type in the surface portion of each of the base regions; a gate electrode over a part of each of the base regions and a part of the one or more emitter regions, with a gate insulation film interposed beneath the gate electrode; an emitter electrode in contact with the base regions and the emitter regions; a collector region of the second conductivity type on the back surface of the drift region; a separation region of the second conductivity type in contact with the side faces of the collector region and the side faces of the drift region; and a collector electrode on the collector region; wherein the emitter electrode and portions of the drift region that extend between the base regions are in contact with each other, forming Schottky junctions.