Patent ID: 9484343
Filing Date: 2016-11-01
CPC Classification: H01L

Claim Text:
1. A reverse-conducting semiconductor device comprising: an insulated-gate bipolar transistor portion comprising: a drift layer of a first conductivity type, a base layer of a second conductivity type selectively formed on the front surface of the drift layer ( an emitter region of the first conductivity type selectively formed on the surface of the base layer, a trench formed from the surface of the base layer into the drift layer, a gate oxide formed on the inner sidewall of the trench, a gate electrode formed to face the base layer and the emitter region sandwiched between the gate oxide, a field stop layer of the first conductivity type formed on the rear side surface of the drift layer, a collector layer of the second conductivity type formed on the rear side surface of the field stop layer, a free-wheeling diode portion adjacent to the insulated-gate bipolar transistor portion, wherein the drift layer and the field stop layer extends from the insulated-gate bipolar transistor portion, an anode layer of a second conductivity type selectively formed on the front surface of the drift layer, and a cathode layer of the first conductivity type formed on the rear side surface of the field stop layer, wherein R wherein the following equation 1 is satisfied as: