Patent ID: 9196714
Filing Date: 2015-11-24
Classification: H01L

Abstract:
1. An IGBT device integrated in a chip of semiconductor material including: a substrate of a first type of conductivity, an active layer of a second type of conductivity formed on an inner surface of the substrate, a body region of the first type of conductivity extending within the active layer from a front surface thereof opposite the inner surface, a source region of the second type of conductivity extending within the body region from the front surface, a channel region being defined within the body region between the source region and the active layer, a gate element insulated from the front surface extending over the channel region, a collector terminal contacting the substrate on a rear surface thereof opposite the inner surface, an emitter terminal contacting the source region and the body region on the front surface, a gate terminal contacting the gate element, and at least one buried emitter region of the first type of conductivity with a concentration of impurities higher than a concentration of impurities of the substrate being formed in a portion of the substrate, said at least one buried emitter region having lateral sides and a bottom in contact with the substrate of the first type of conductivity, wherein a further portion of the substrate is interposed between the bottom of the at least one buried emitter region and the collector terminal defining an emitter resistor.