Light controllable thyristors

Details Light controllable thyristors Light controllable thyristors

1978-03-30

1989-03-14

Clawson, Jr., Joseph E.

357 30, 357 55, 357 86, H01L 2974

Patent

active

048128929

ABSTRACT:
Light controllable thyristors in which the sensitivity to light of the thyristors has been increased by increasing the emitter shunt resistance for the auxiliary thyristor coupling to small area optical light guides. The shunt resistance is increased by providing one or more grooves in the base region between the light sensitive thyristor and the main power thyristor which provides that the control current must pass through a circuitous path toward lower regions of the base layer and, thus, increase the shunt resistance.

REFERENCES:
patent: 3978513 (1976-08-01), Terasawa
patent: 4001865 (1977-01-01), Voss
patent: 4012761 (1977-03-01), Ferro et al.
patent: 4087834 (1978-05-01), Temple
patent: 4092703 (1978-05-01), Sueoka et al.
patent: 4114178 (1978-09-01), Terasawa et al.
patent: 4122480 (1978-10-01), Silber et al.
patent: 4739387 (1988-04-01), Temple et al.

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