Light-ignitable thyristor with anode-base duct portion extending

Details Light-ignitable thyristor with anode-base duct portion extending Light-ignitable thyristor with anode-base duct portion extending

1981-03-12

1982-08-03

Clawson, Jr., Joseph E.

357 20, 357 30, 357 86, H01L 2974

Patent

active

043430147

ABSTRACT:
A light-ignitable thyristor formed of a main thyristor and an auxiliary thyristor integrated on a common wafer, wherein in order to reduce the ignition ratio between the main and auxiliary thyristors, the length of the cathode emitter edge near the gate of the main thyristor is shortened by forming anode base zone ducts which reach up to the cathode side surface between portions of the main thyristor gate and cathode zones. The width of the anode base zone areas formed on the cathode surface side is selected such that during the entire ignition process, a narrow space charging zone acting as an insulation zone remains at least partially around the PN junction bordering the surface areas of the anode base zone.

REFERENCES:
patent: 3832732 (1974-08-01), Roberts
patent: 4142201 (1979-02-01), Sittig et al.
patent: 4208669 (1980-06-01), Silber et al.

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