Patent ID: 11038020

Abstract:
A silicon carbide semiconductor device includes a semiconductor substrate and a first semiconductor layer of the first conductivity type; a second semiconductor layer of a second conductivity type; a first semiconductor region of the first conductivity type; a gate electrode provided opposing at least a surface of the second semiconductor layer between the first semiconductor region and the first semiconductor layer, across a gate insulating film; and a first electrode provided on surfaces of the first semiconductor region and the second semiconductor layer. Protons are implanted in a first region of the semiconductor substrate, spanning at least 2 μm from a surface of the semiconductor substrate facing toward the first semiconductor layer; and in a second region of the first semiconductor layer, spanning at least 3 μm from a surface of the first semiconductor layer facing toward the semiconductor substrate. The protons having a concentration in a range from 1×1013/cm3 to 1×1015/cm3.