Patent ID: 9324806
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A silicon carbide semiconductor device comprising: a silicon carbide semiconductor layer of a first conductivity type; a field insulating film formed on a surface of said silicon carbide semiconductor layer; a Schottky electrode formed on the surface of said silicon carbide semiconductor layer on an inner periphery side relative to said field insulating film, a peripheral edge of said Schottky electrode being formed to overlap onto said field insulating film; a front-surface electrode that covers said Schottky electrode and extends on said field insulating film beyond the peripheral edge of said Schottky electrode; a terminal well region of a second conductivity type that is formed to be in contact with a part of said Schottky electrode in an upper part of said silicon carbide semiconductor layer and extends in said silicon carbide semiconductor layer on an outer periphery side relative to a peripheral edge of said front-surface electrode; and a high-concentration terminal well region of the second conductivity type that is formed in said terminal well region and has a second-conductivity-type impurity concentration higher than that of said terminal well region, wherein the peripheral edge of said front-surface electrode is located at a distance of 15 μm or more inward from a peripheral edge of said terminal well region.