Patent ID: 9153674
Filing Date: 2015-10-06
Classification: H01L

Abstract:
1. An insulated gate bipolar transistor, comprising: a transistor cell area including source, body regions, and gates and a junction termination area at a first side of a semiconductor zone of a first conductivity type; an emitter region of a second conductivity type at a second side of the semiconductor zone, the emitter region being opposed to the cell area region; at least one second region of the second conductivity type at the second side of the semiconductor zone, wherein the at least one second region is opposed to and covered by the cell area region and each of the at least one second region is disposed at a lateral distance from the emitter region and has a lateral dimension smaller than the emitter region, and wherein the at least one second region is configured to inject charge carriers into the semiconductor zone via a terminal at the second side; and a third region of the second conductivity type at the second side of the semiconductor zone, the third region being arranged in an area including at least part of both the emitter region and the at least one second region, and wherein a maximum dopant concentration of the third region is smaller than the maximum dopant concentration of the emitter region, wherein the at least one second region is arranged between the emitter region and the junction termination area; and wherein each of the emitter region, the at least one second region and the third region extend from a common surface at the second side into the semiconductor zone.