Semiconductor device

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

Reexamination Certificate

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C257S120000

Reexamination Certificate

active

07064384

ABSTRACT:
A semiconductor device comprises: a first main electrode; a second main electrode; a semiconductor base region of a first conductivity type; a gate electrode provided in a trench through an insulating film, the trench being formed to penetrate the semiconductor base region; and a first semiconductor region of a first conductivity type and a second semiconductor region of a second conductivity type provided under the semiconductor base region. A flow of a current between the first and second main electrodes when a voltage of a predetermined direction is applied between these electrodes is controllable in accordance with a voltage applied to the gate electrode. A depleted region extends from a junction between the first and the second semiconductor regions reaching the trench.

REFERENCES:
patent: 5378914 (1995-01-01), Ohzu et al.
patent: 5793065 (1998-08-01), Shinohe et al.
patent: 6580123 (2003-06-01), Thapar
patent: 6621132 (2003-09-01), Onishi et al.
patent: 6720615 (2004-04-01), Fujihira
patent: 6777746 (2004-08-01), Kitagawa et al.
patent: 2004/0094798 (2004-05-01), Hara et al.
patent: 2002-26324 (2002-01-01), None
patent: 2002-94061 (2002-03-01), None

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