Patent ID: 9450110
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a semiconductor substrate of a first conductive type; an active region that is formed on a first primary surface of the semiconductor substrate and allows a primary electric current to flow therethrough; an edge termination structure surrounding the active region; a first semiconductor region of a second conductive type, the first semiconductor region being formed in the active region; a plurality of second semiconductor regions of the second conductive type, the second semiconductor regions constituting the edge termination structure; a first primary electrode above the first primary surface, electrically connected to the first semiconductor region, having a lower surface in contact with a semiconductor surface on an upper surface of the semiconductor substrate, and having a contact edge at a circumferential edge of the lower surface; a third semiconductor region of the second conductive type, the third semiconductor region being a resistance region separated from the first primary electrode in a depth direction by an insulating film interposed between the third semiconductor region and the first primary electrode, and the third semiconductor region being between the first semiconductor region and the second semiconductor regions; and two or more diffusion regions of the second conductive type having different resistances and being respectively disposed in an upper surface of the semiconductor substrate along a direction outward from the first semiconductor region.