Patent ID: 9443942
Filing Date: 2016-09-13
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a first conductivity type semiconductor substrate; a second conductivity type first semiconductor region that is disposed in a front surface layer of the first conductivity type semiconductor substrate; a second conductivity type guard ring region that is a breakdown voltage structure disposed surrounding the first semiconductor region, the guard ring region including a plurality of guard rings; an insulating film that extends from an end portion of the first semiconductor region and formed to continuously extend over the plurality of guard rings; a conductive film that is disposed on the semiconductor substrate so as to be sandwiched between the end portion of the first semiconductor region and an end portion of the guard ring region, and on the guard ring region via the insulating film; and a main electrode, disposed on the first semiconductor region, which is spaced away from the conductive film, wherein the insulating film is formed between the second conductivity type guard ring region and the conductive film without a trench in the insulating film reaching the second conductivity type guard ring region, wherein the guard rings are disposed relative to each other and the first semiconductor region so that