Patent ID: 8791500

Claim:
A semiconductor device having a lateral insulated gate bipolar transistor, the semiconductor device comprising: a semiconductor substrate having a first conductivity type drift layer; a second conductivity type collector region formed in a surface portion of the drift layer and having a longitudinal direction; a second conductivity type channel layer formed in the surface portion of the drift layer and having a straight-shaped portion located on each side of the collector region; a first conductivity type emitter region formed in a surface portion of the channel layer and terminated inside the channel layer, the emitter region having a straight-shaped portion extending parallel to the longitudinal direction; a gate insulation layer in contact with a channel region of the channel layer, the channel region located between the emitter region and the drift layer; a gate electrode formed on a surface of the gate insulation layer; a collector electrode electrically connected to the collector region; an emitter electrode electrically connected to the emitter region and the channel layer; and a hole stopper region formed in the drift layer and located between the collector region and the emitter region, wherein holes are injected from the collector region into the drift layer and flow toward the emitter region through a hole path, and the hole stopper region blocks a flow of the holes and narrows the hole path to concentrate the holes.