Thyristor fired by overvoltage

Details Thyristor fired by overvoltage Thyristor fired by overvoltage

1977-11-03

1979-11-27

Clawson, Jr., Joseph E.

357 13, 357 86, 357 89, 357 90, H01L 2974

Patent

active

041763718

ABSTRACT:
A thyristor having an auxiliary cathode emitter region disposed in the central portion of the device in PN junction relationship with a cathode base region is disclosed. An extra impurity region of the same conductivity type as the cathode base region is disposed in the cathode base region in the central portion of the device inwardly of the outer boundary of the auxiliary cathode emitter. The extra impurity region has a higher impurity density gradient adjacent the common PN junction formed by the cathode and anode base regions than the remainder of such junction.

REFERENCES:
patent: 3236698 (1966-02-01), Shockley
patent: 3408545 (1968-10-01), De Cecco et al.
patent: 3766450 (1973-10-01), Voss et al.

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