Patent ID: 8643065

Claim:
A semiconductor device comprising: a wafer having at least one main surface made of silicon carbide; and an electrode formed on said one main surface, said wafer including an ion implantation region formed to include said one main surface, said ion implantation region including a base region disposed to include said one main surface, and a protruding region connected to said base region and extending in a direction opposite to said electrode, said base region being greater in width in a direction along said one main surface than said protruding region, said electrode being disposed in contact with said ion implantation region such that said electrode is entirely located on said ion implantation region as seen in plan view, said electrode being a gate electrode, said wafer including a first layer of a first conductivity type, a layer of a second conductivity type which is different in conductivity type from said first layer of the first conductivity type, and disposed on and in contact with said first layer of the first conductivity type, a second layer of the first conductivity type which is identical in conductivity type to said first layer of the first conductivity type, and disposed on and in contact with said layer of the second conductivity type, and said ion implantation region touching said layer of the second conductivity type, wherein said protruding region of said ion implantation region is embedded in said layer of the second conductivity type, and said protruding region is spaced apart from said first layer of the first conductivity type.