Patent ID: 7989910

Claim:
A semiconductor device comprising: a semiconductor substrate of a first conductivity type having top and bottom surfaces that are opposed to each other, the semiconductor substrate having a device region and a terminal region surrounding the device region; a super junction region having, on the top surfaces of the device and terminal regions, a first semiconductor pillar region of the first conductivity type and a second semiconductor pillar region of a second conductivity type, the first and second semiconductor pillar regions being alternately provided along the top surface of the semiconductor substrate; a first main electrode electrically connected to the bottom surface of the semiconductor substrate; a semiconductor base region of the second conductivity type selectively provided in the top surface of the super junction region; a semiconductor diffusion region of the first conductivity type selectively provided in the top surface of the semiconductor base region; a second main electrode electrically connected to the semiconductor base region and the semiconductor diffusion region; a control electrode provided, via an insulating film, on a region that includes the semiconductor diffusion region, the semiconductor base region, and the first semiconductor pillar region; and a RESURF region of the second conductivity type provided in the top surface of the super junction region in the terminal region, the RESURF region being connected to the semiconductor base region, the RESURF region having a comb-like planar shape with repeatedly-formed teeth having tips facing the end portion of the terminal region, and the tip of the teeth being forward tapered toward its tip.