Patent ID: 11916137
Assignee: SANKEN ELECTRIC CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a semiconductor substrate including an active region and an inactive region, the active region, comprising:
a drift region of a first conductivity type;
a base region of a second conductivity type arranged on the drift region;
an emitter region of the first conductivity type arranged on the base region;
a field stop region of the first conductivity type arranged in contact with the drift region;
a collector region of the second conductivity type arranged in contact with the field stop region;
a main gate electrode electrically insulated from the base region, the main gate electrode is arranged in a first trench on a surface side of the semiconductor substrate, and comprises polysilicon; and

the inactive region arranged on periphery of the active region, comprising:
a gate pad arranged on the drift region; and
a first resistor electrically connected between the gate pad and the main gate electrode, the first resistor is arranged in a second trench on the surface side of the semiconductor substrate and comprises polysilicon with higher resistance than that of the main gate electrode.