Patent ID: 6465874
Filing Date: 2002-10-15
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor chip having a first major surface and a second major surface facing opposite to the first major surface; an anode electrode on the first major surface; a cathode electrode on the second major surface; the semiconductor chip further comprising a first laminate structure, a second laminate structure and a third laminate structure arranged in parallel to each other, the second laminate structure being interposed between the first laminate structure and the third laminate structure; wherein the first laminate structure, the second laminate structure and the third laminate structure comprise a common cathode layer of a first conductivity type contacting the cathode electrode and a common drift layer of the first conductivity type on the cathode layer, the drift layer being doped more lightly than the cathode layer; wherein the first laminate structure further comprises an anode layer of a second conductivity type on the drift layer, the anode layer being doped more heavily than the drift layer, and the anode layer contacting the anode electrode; wherein the second laminate structure further comprises a Schottky junction between the drift layer and the anode electrode; and wherein the third laminate structure further comprises an insulation film between the drift layer and the anode electrode.