Patent ID: 9312385
Filing Date: 2016-04-12
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first semiconductor region of a second conductivity type which is disposed on an upper portion of a first surface side of a substrate; a plurality of source regions of a first conductivity type which are disposed on the upper portion of the first surface side of the substrate and arranged on a circumference of the first semiconductor region so as to be spaced apart from one another; second semiconductor regions of the second conductivity type which respectively surround the plurality of source regions; a gate electrode which is disposed on an upper portion of the second semiconductor region via a gate insulating film; and a buried semiconductor region of the second conductivity type which is disposed in the first semiconductor region, extends from a lower portion of the first semiconductor region to a portion below the plurality of source regions, and has a concentration of an impurity of the second conductivity type higher than that in the second semiconductor region.