Patent ID: 7808003

Claim:
A silicon carbide semiconductor device having a vertical type semiconductor element, comprising: a substrate made of silicon carbide; a drift layer made of silicon carbide, having a first conductivity type, and located on a first surface of the substrate, wherein the substrate and the drift layer has a cell portion; an impurity layer having a second conductivity type, located in the cell portion, and located in a surface portion of the drift layer; a first electrode located on a first surface side of the substrate so that the impurity layer and the drift layer are located between the first electrode and the substrate; a second electrode located on a second surface side of the substrate; and a first conductivity type region located in the cell portion, located in the drift layer, spaced away from the impurity layer, located closer to the substrate than the impurity layer, and having an impurity concentration larger than the drift layer, wherein the vertical type semiconductor device element is configured so that a current flows between the first electrode and the second electrode.