Patent ID: 7868424
Filing Date: 2011-01-11
Classification: B82Y,H01L

Abstract:
1. A semiconductor device with a substrate and a semiconductor body comprising a vertical bipolar transistor with an emitter region, a base region and a collector region of, respectively, a first conductivity type, a second conductivity type opposite to the first conductivity type and the first conductivity type, wherein the collector region comprises a first sub-region bordering on the base region and a second sub-region bordering on the first sub-region which has a lower doping concentration than the second sub-region and the transistor is provided with a gate electrode which laterally borders on the first sub-region and by means of which the first sub-region can be depleted, characterized in that the collector region borders on the surface of the semiconductor body while the emitter region is recessed in the semiconductor body and the collector region forms part of a mesa structure formed at the surface of the semiconductor body, wherein the gate electrode is separated from the semiconductor body by an insulating layer.