Patent ID: 9472660
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first electrode formed on a first principal surface of a first conductivity type semiconductor substrate; a second electrode formed on a second principal surface of the semiconductor substrate; a base layer of a second conductivity type formed on the first principal surface of the semiconductor substrate and connected to the first electrode; a VLD region of the second conductivity type provided on an outer circumferential side of the base layer; a floating region of the second conductivity type provided on an outer circumferential side of the VLD region and separated from the VLD region; and a stopper layer of the first or second conductivity type provided on an outer circumferential side of the VLD region and separated from the VLD region, wherein the floating region further comprises: a field region of the second conductivity type provided on the outer circumferential side of the VLD region and separated from the VLD region and which is lower in impurity concentration than the VLD region, and a first clip layer of the second conductivity type which is provided between the field region and the stopper layer and separated from the field region and the stopper layer and which is higher in impurity concentration than the field region.