Patent ID: 9704957
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. A silicon carbide semiconductor device, comprising: a silicon carbide semiconductor layer including a main surface; and an electrode formed on the main surface, the silicon carbide semiconductor layer including wherein a first position exists at which an impurity concentration 1/10 as high as a highest impurity concentration is exhibited in a concentration profile of an impurity having the first conductivity type in a direction perpendicular to the main surface in the third impurity region and a second position exists at which an impurity concentration 1/10 as high as a highest impurity concentration is exhibited in a concentration profile of an impurity having the second conductivity type in the direction perpendicular to the main surface in the second impurity region, a first depth from the main surface to the first position being shallower than a second depth from the main surface to the second position, and the electrode being electrically connected to the second impurity region and the third impurity region.