Patent ID: 8471291

Claim:
A semiconductor device comprising a semiconductor substrate including a main region and a sense region, the sense region being smaller than the main region in a plan view of the semiconductor substrate, wherein the main region comprises a main diode and a main IGBT, the main diode comprises: a first conductivity type main anode region formed on an upper surface of the semiconductor substrate, a second conductivity type main diode drift region formed on a lower side of the main anode region, and a second conductivity type main cathode region formed on a lower side of the main diode drift region and on a lower surface of the semiconductor substrate; the main IGBT comprises: a first conductivity type main collector region formed on a lower surface of the semiconductor substrate, a second conductivity type main drift region formed on an upper side of the main collector region, a first conductivity type main body region formed on an upper side of the main drift region and on an upper surface of the semiconductor substrate, a second conductivity type main emitter region formed on a part of an upper surface of the main body region, and a main insulated gate electrode formed from an upper surface of the main emitter region to the depth in which the main body region contacting with the main drift region; and the sense region comprises: a first conductivity type sense collector region formed on a part of a lower surface of the semiconductor substrate, a second conductivity type sense drift region formed on an upper side of the sense collector region, a first conductivity type sense body region formed on an upper side of the sense drift region and on an upper surface of the semiconductor substrate, a second conductivity type sense emitter region formed on a part of an upper surface of the sense body region, and a sense insulated gate electrode formed from an upper surface of the sense emitter region to the depth in which the sense body region contacting with the sense drift region, the sense region includes a first region, in which a distance from the main cathode region to the sense emitter region in the plan view of the semiconductor substrate being equal to or longer than 615 μm.