Thyristor

Details Thyristor Thyristor

1975-02-06

1976-11-30

Lynch, Michael J.

357 20, 357 68, 357 86, H01L 2974

Patent

active

039953050

ABSTRACT:
A thyristor is disclosed having a semiconductor body with at least four zones of alternate conductivity type in which the second zone has a control electrode and in which the first zone has a main emitter and first and second auxiliary emitters. The first auxiliary emitter is located between the control electrode and the second auxiliary emitter and the second emitter is located between the first auxiliary emitter and the main emitter. The ratio of the effective edge lengths of the first auxiliary emitter to the second auxiliary emitter and the ratio of the effective edge lengths of the second auxiliary emitter to the main emitter are matched to one another in such a manner that prior to the ignition of the first auxiliary emitter, ignition is initiated on the second auxiliary emitter, and then on the main emitter. The ratio of the effective edge lengths of the first auxiliary emitter to the second auxiliary emitter is .gtoreq.1:3 and the ratio of the effective edge lengths of the second auxiliary emitter to the main emitter is .ltoreq.1:4. Various specific structure shapes are described.

REFERENCES:
patent: 3360696 (1967-12-01), Neilson et al.
patent: 3573572 (1971-04-01), Cooper et al.
patent: 3579060 (1971-05-01), Davis
patent: 3681667 (1972-08-01), Kokosa
patent: 3731162 (1973-05-01), Suenaga et al.
patent: 3879744 (1975-04-01), Dumas

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