Patent ID: 8076695
Filing Date: 2011-12-13
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate having a first semiconductor region of a first semiconductor type, a second semiconductor region of a second conductivity type extended in the first semiconductor region, and a mesa area forming a slope along an outer circumference of the semiconductor substrate; a first electrode provided on a first principal surface of the semiconductor substrate; and a second electrode provided on a second principal surface of the semiconductor substrate that is opposed to the first principal surface; wherein the second semiconductor region comprises: wherein a portion of the first semiconductor region is interposed between the diffused portions and between the diffused portions and the annular portion; and the diffused portions are composed of a small pitch region and a large pitch region having a larger pitch than that of the small pitch region, wherein the diffused portions include at least two small pitch regions, and the large pitch region is interposed between two small pitch regions.