Patent ID: 11869960
Assignee: FUJI ELECTRIC CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC H

Claim 0:
1. A semiconductor device, comprising:
a semiconductor substrate; and
an emitter electrode provided above an upper surface of the semiconductor substrate; wherein
the semiconductor substrate has:
a first conductive type drift region;
a second conductive type base region provided between the drift region and the upper surface of the semiconductor substrate;
a second conductive type contact region with a higher doping concentration than the base region, which is provided between the base region and the upper surface of the semiconductor substrate;
a trench contact of a conductive material provided to connect to the emitter electrode and penetrate the contact region; and
a second conductive type high-concentration plug region with a higher doping concentration than the contact region, which is provided in contact with a bottom portion of the trench contact, wherein the upper surface of the high-concentration plug region is deeper into the semiconductor substrate than the contact region.