Patent ID: 9324848
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first conductivity-type drift layer; a second conductivity-type base layer formed in a front surface portion of the drift layer; a second conductivity-type collector layer formed in the drift layer and separated from the base layer; a plurality of gate insulation layers formed on a surface of the base layer; a plurality of gate electrodes individually formed on the plurality of gate insulation layers; an emitter layer formed in a front surface portion of the base layer; an emitter electrode electrically connected to the emitter layer and the base layer; and a collector electrode electrically connected to the collector layer, wherein the plurality of gate electrodes are configured such that a rate of change in a gate voltage of each gate electrode in a part of the plurality of gate electrodes is smaller than a rate of change in a gate voltage of each gate electrode in a remainder of the plurality of gate electrodes, the emitter layer is in contact with each gate insulation layer provided with the part of the plurality of gate electrodes, the emitter layer is not in contact with each gate insulation layer provided with the remainder of the plurality of gate electrodes, each gate electrode of the group of the plurality of electrodes is connected to a first resistor, each gate electrode of the remainder of the plurality of gate electrodes being connected to a second resistor, and a resistance of the second resistor is smaller than that of the first resistor.