Patent ID: 8203181
Filing Date: 2012-06-19
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor body comprising a first surface, a first semiconductor region of a first conductivity type and a second semiconductor region of a second conductivity type, the first semiconductor region and the second semiconductor region forming a pn-junction; a source metallization arranged on the first surface; and a trench extending from the first surface into the semiconductor body and comprising, in a horizontal plane substantially parallel to the first surface, a first trench portion and a second trench portion; and the first trench portion comprising a gate electrode connected to the source metallization and an insulating layer arranged between the gate electrode and the second semiconductor region; the second trench portion comprising a conductive plug which is connected to the source metallization and to the second semiconductor region; wherein the first semiconductor region forms a source region which is connected to the source metallization and extends to the first surface; wherein the second semiconductor region forms a body region; wherein the semiconductor body further comprises a drift region of the first conductivity type adjacent to the body region; and wherein the first trench portion and the second trench portion extend through the source region and at least partially into the body region; and wherein the semiconductor body further comprises a body contact region of the second conductivity type which provides an electrical connection between the body region and the conductive plug of the second trench portion; wherein the body region comprises a first doping concentration; and wherein the body contact region comprises a second doping concentration which is higher than the first doping concentration.