Patent ID: 8648349
Filing Date: 2014-02-11
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor wafer of a first conductivity type; a plurality of body regions of a second conductivity type formed to include a first main surface which is one main surface of said semiconductor wafer; and carrier supply regions of the first conductivity type formed in regions surrounded by said plurality of body regions, respectively, when viewed two-dimensionally, each of said body regions having an outer periphery located outside of said carrier supply regions, said outer periphery having a substantially circular shape when viewed two-dimensionally, each of said carrier supply regions being arranged concentrically with each of said body regions and having a substantially circular shape when viewed two-dimensionally, and each of said plurality of body regions being arranged to be positioned at a vertex of a regular hexagon when viewed two-dimensionally, wherein said semiconductor wafer includes a semiconductor substrate of the first conductivity type and a semiconductor layer of the first conductivity type, said semiconductor layer is formed between said semiconductor substrate and said plurality of body regions, wherein a concentration of the first conductivity type impurity contained in said semiconductor layer is lower than that of said semiconductor substrate, and wherein a concentration of the first conductivity type impurity contained in said semiconductor substrate is greater than a concentration of the second conductivity type impurity contained in said plurality of body regions.