Patent ID: 8928072
Filing Date: 2015-01-06
Classification: H01L

Abstract:
1. A semiconductor device, having: a semiconductor layer of a first conductive type; a body region of a second conductive type formed in the semiconductor layer; a source region and a drain region of the first conductive type formed in the semiconductor layer so as to be separated from each other across the body region; a source trench formed in the semiconductor layer, the source trench penetrating the source region and reaching the body region; a body contact region formed near a bottom of the source trench and in the semiconductor layer of the first conductive type that includes the body region, the body contact region being the second conductive type and having a higher impurity concentration than that of the body region; a source electrode embedded in the source trench; a gate electrode facing through a gate insulating layer the body region that lies between the source region and the drain region; a first conductive type region for a diode formed in the semiconductor layer; a diode trench formed in the semiconductor layer that includes the first conductive type region for a diode; a second conductive type region for a diode formed in the first conductive type region for a diode so as to be in contact with a bottom of the diode trench, the second conductive type region for a diode forming a pn junction with the first conductive type region for a diode; and a schottky electrode forming a schottky junction with the first conductive type region for a diode at side walls of the diode trench.