Patent ID: 9536875
Date: 2017-01-03
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising a first element region in which an insulated gate bipolar transistor is provided and a second element region in which a diode is provided on a semiconductor substrate that forms a first conductivity type drift region, the semiconductor device further comprising: a plurality of trenches provided in stripe form extending in a trench longitudinal direction perpendicular to a direction in which the first element region and second element region are aligned from the first element region across the second element region in a front surface of the semiconductor substrate; a gate insulating film provided along side walls and bottom surfaces of the trenches; a gate electrode provided on an inner side of the gate insulating film inside the trenches; a second conductivity type base region selectively provided in a mesa portion between neighboring trenches of the first element region; a second conductivity type anode region selectively provided in the mesa portion between neighboring trenches of the second element region; a first conductivity type emitter region selectively provided inside the base region; a first electrode in contact with the base region, emitter region, and anode region; a second conductivity type collector region provided on a back surface of the semiconductor substrate in the first element region; a first conductivity type cathode region provided on the back surface of the semiconductor substrate in the second element region; and a second electrode in contact with the collector region and cathode region, wherein the anode region and drift region are repeatedly, alternately disposed in the trench longitudinal direction in a top surface of the mesa portion between neighboring trenches of the second element region.