Semiconductor device and control method

Details Semiconductor device and control method Semiconductor device and control method

1995-05-04

1997-04-15

Prenty, Mark V.

Active solid-state devices (e.g., transistors, solid-state diode

Conductivity modulation device

257110, 257133, 257146, H01L 2358

Patent

active

056212291

ABSTRACT:
A semiconductor device which reduces the turn-off time and the accompanying switching loss in a switching semiconductor device in which conductivity modulation is used to provide a low ON-state voltage. The conductivity modulation is provided by injection of minority carriers. A minority carrier injection-control structure is provided in part of a semiconductor device to change the polarity of a voltage applied to a gate electrode to start or stop the injection of minority carriers. During the ON-state, minority carriers are injected to obtain a low ON-state voltage, while during the OFF-state, the injection of minority carriers are stopped and a channel for majority carriers is formed to eliminate the accumulation of excess carriers and to accelerate discharge, thereby reducing the turn-off time and thus the switching loss.

REFERENCES:
patent: 4998156 (1991-03-01), Goodman et al.
patent: 5105244 (1992-04-01), Bauer

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