Gate turn-off thyristor with independent turn-on/off controlling

Details Gate turn-off thyristor with independent turn-on/off controlling Gate turn-off thyristor with independent turn-on/off controlling

1986-09-30

1988-07-26

Clawson, Jr., Joseph E.

357 30, 357 2314, 357 38, 357 43, 357 86, H01L 2978

Patent

active

047604310

ABSTRACT:
A gate turn-off thyristor has first and second MOSFETs serving as turn-on and turn-off controlling devices, respectively. A p type semiconductor layer is additionally formed in an n type substrate functioning as a first base in such a manner as to overlap a p type second base layer. The additional layer is different from the second base in impurity concentration, thereby causing the resistivity of the second base to be smaller than that of the additional layer. The first MOSFET has an n type source layer formed in the additional layer to define a surface portion of the additional layer positioned between the source layer and the first base layer as a channel region of the first MOSFET. A turn-on gate layer is provided to cover a surface region of the first base and the channel region of the first MOSFET.

REFERENCES:
patent: 4224634 (1980-09-01), Svedberg
patent: 4441117 (1984-04-01), Zommer
patent: 4443931 (1984-04-01), Baliga et al.
patent: 4547791 (1985-10-01), Roger et al.
patent: 4580154 (1986-04-01), Coe
patent: 4581543 (1986-04-01), Herberg
patent: 4604535 (1986-08-01), Sasayama et al.
patent: 4604638 (1986-08-01), Matsuda
patent: 4636830 (1987-01-01), Bhakat
V. A. K. Temple, "MOS Controlled Thyristors (MCT'S)" IEEE IEDM Tech. Digest, pp. 282-285 (1984).
M. St oisiek et al., "MOS GTO-A Turn Off Thyristor with MOS-Controlled Emitter Shorts", IEEE IEDM Tech. Digest, pp. 158-161 (1985).

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