Patent ID: 9711626
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A reverse-conducting IGBT, comprising: a semiconductor body comprising a first surface, a second surface opposite to the first surface, an n-type drift region arranged between the first surface and the second surface, a p-type first collector region arranged at the second surface, a p-type second collector region arranged at the second surface, and an n-type backside emitter region in Ohmic contact with the drift region and arranged at the second surface; a first electrode arranged on the first surface; a second electrode arranged on the second surface and in Ohmic contact with the first collector region, the second collector region and the backside emitter region; a first IGBT-cell comprising a first body region arranged in the semiconductor body and forming a first pn-junction with the drift region, a number of p-type dopants per area in the first IGBT-cell between the first pn-junction and the first surface having a first value; a first diode-cell comprising a first anode region arranged in the semiconductor body and forming a second pn-junction with the drift region, a number of p-type dopants per area in the first diode-cell between the second pn-junction and the first surface having a second value lower than the first value; a second IGBT-cell comprising a second body region arranged in the semiconductor body and forming a third pn-junction with the drift region, a number of p-type dopants per area in the second IGBT-cell between the third pn-junction and the first surface having a third value higher than the second value; and a second diode-cell comprising a second anode region arranged in the semiconductor body and forming a fourth pn-junction with the drift region, a number of p-type dopants per area in the second diode-cell between the fourth pn-junction and the first surface having a fourth value higher than the second value, in a projection onto the first surface the first collector region overlapping with at least one of the first IGBT-cell and the first diode-cell, the backside emitter region overlapping with at least one of the first IGBT-cell and the first diode-cell, and the second collector region overlapping with the second IGBT-cell and the second diode-cell.