Patent ID: 9553144
Date: 2017-01-24
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a semiconductor substrate; a first semiconductor region, having a first conduction type, on a main surface of the semiconductor substrate, and that includes an extension portion extending in a specific direction and having a specific width as viewed along a direction orthogonal to the main surface; a second semiconductor region, having the first conduction type, on the main surface separated from the first semiconductor region, and shaped to include a portion running along the extension portion of the first semiconductor region as viewed along the direction orthogonal to the main surface; a field relaxation layer on a second semiconductor region side of the main surface, and that is a semiconductor layer having a second conduction type that is different than the first conduction type, wherein an end portion of the field relaxation layer facing the first semiconductor region coincides with an end portion of the second semiconductor region facing the first semiconductor region; and a conductor connected to the second semiconductor region, and that has an end portion on a first semiconductor region side positioned within a range of the field relaxation layer.