Patent ID: 7880226
Filing Date: 2011-02-01
Classification: H01L

Abstract:
1. An integrated circuit device, comprising: a semiconductor body having a first conduction type; a cell field including a drift zone of the first conduction type and body zones; an edge region surrounding the cell field; a trench structure including field plates with a trench gate structure in the cell field and an edge trench surrounding the cell field in the edge region; and an edge zone of a conduction type complementing the first conduction type and with doping material of the same conduction type as the body zones of the cell field, the edge zone of the complementary conduction type extending on either side of the edge trench such that the edge zone extends into both the cell field and the edge region so as to form a p-n junction between the edge zone and the edge region; wherein the field plates of the trench structure in the cell field are at source potential and vertical trench gate structures surround each of the field plates and are insulated from the field plates with a gate oxide situated between the trench gate structures and the body zone.