Patent ID: 8766325

Claim:
A semiconductor device, comprising: a first conductive type base layer; a second conductive type base layer formed in a part of a front surface portion of the first conductive type base layer; a first conductive type source layer formed in a part of a front surface portion of the second conductive type base layer; a gate insulating film formed on a front surface of the second conductive type base layer between the first conductive type source layer and the first conductive type base layer; a gate electrode formed on the gate insulating film so as to face, through the gate insulating film, the second conductive type base layer between the first conductive type source layer and the first conductive type base layer; a second conductive type column layer formed continuously from the second conductive type base layer within the first conductive type base layer, the second conductive type column layer extending from the second conductive type base layer toward a rear surface of the first conducive type base layer; a second conductive type collector layer formed in a part of a rear surface portion of the first conductive type base layer; a source electrode electrically connected to the first conductive type source layer; and a drain electrode formed so as to make contact with the rear surface of the first conductive type base layer, the drain electrode being electrically connected to the first conductive type base layer and the second conductive type collector layer.