| 摘要 |
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.
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