Light activated thyristor

Details Light activated thyristor Light activated thyristor

H - Electricity

01

L

345/24

H01L 29/74 (2006.01) H01L 31/111 (2006.01)

Patent

CA 1064150

ABSTRACT OF THE DISCLOSURE The present invention pertains to a light acti- vated thyristor which increases the current density of light-generated carriers by means of a low resistance path from an area of carrier generation in a base zone of a first conductivity type into a portion of an adjacent emit- ter zone of a second conductivity type. In one embodiment the low resistance path takes the form of an annular gate electrode affixed to the base zone and having a projection bordering the base-emitter PN junction. In another embodi- ment the low resistance path takes the form of a ballast segment disposed in the base zone, the ballast segment hav- ing an opening for funnelling the carriers to the base- emitter PN junction.

259920

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