Patent ID: 11973132
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device comprising:
a semiconductor substrate having a first principal surface and a second principal surface opposite to each other; and
an insulated gate bipolar transistor (IGBT), a diode, and a well region provided in the semiconductor substrate,
wherein the IGBT includes a trench gate provided in the first principal surface of the semiconductor substrate,
the diode includes a p-type anode layer provided in the first principal surface of the semiconductor substrate,
the well region includes a p-type well layer provided in the first principal surface of the semiconductor substrate, having an impurity concentration higher than that of the p-type anode layer, and having a depth larger than that of the trench gate,
a terminal end of the trench gate extends into the p-type well layer such that the p-type well layer surrounds the terminal end in a plan view,
the diode is provided on an outer side of the IGBT in the semiconductor substrate, and
the well region is provided on an outer side of the diode in the semiconductor substrate.