Patent ID: 9356141
Filing Date: 2016-05-31
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a semiconductor body, having a first surface; a gate electrode structure, which comprises polycrystalline silicon, of an insulated gate field effect transistor (IGFET) in a first trench extending from the first surface into the semiconductor body; and a semiconductor element, which is electrically isolated from the gate electrode structure of the IGFET and comprises polycrystalline silicon, in a second trench extending from the first surface into the semiconductor body, wherein the polycrystalline silicon of the IGFET and the polycrystalline silicon of the semiconductor element both end below a top side of an insulation layer, wherein the insulation layer adjoins the first surface of the semiconductor body, and wherein the first trench extends via a boundary of an active cell array into an edge termination structure of the IGFET.