Patent ID: 9478655
Filing Date: 2016-10-25
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising a semiconductor body and at least one device cell integrated in the semiconductor body, the at least one device cell comprising: a drift region, a source region, and a body region arranged between the source region and the drift region; a diode region and a pn junction between the diode region and the drift region; a trench with a first sidewall, a second sidewall opposite the first sidewall, and a bottom, the body region adjoining the first sidewall, the diode region adjoining the second sidewall, and the pn junction adjoining the bottom of the trench; a gate electrode arranged in the trench and dielectrically insulated from the body region, the diode region and the drift region by a gate dielectric; wherein the diode region comprises a lower diode region arranged below the bottom of the trench; and wherein the lower diode region has a maximum of a doping concentration distant to the bottom of the trench.