Thyristor with voltage breakover current control and method

Details Thyristor with voltage breakover current control and method Thyristor with voltage breakover current control and method

H - Electricity

01

L

356/161

H01L 29/74 (2006.01) H01L 29/10 (2006.01) H01L 29/87 (2006.01)

Patent

CA 1114522

TO ALL WHOM IT MAY CONCERN: BE IT KNOWN that I, VICTOR A. K. TEMPLE, a citizen of Canada, residing in the city of Clifton Park, county of Saratoga, state of New York, have invented certain new and useful improve- ments in a THYRISTOR WITH VOLTAGE BREAKOVER CURRENT CONTROL AND METHOD of which the following is the specification. Abstract of the Disclosure A thyristor of the type having a localized voltage break- over region is provided with current limiting means for control- ling the current through the device during initial voltage break- over. The thyristor base zone is divided into two at least par- tially separated base portions, one of which is in the vicinity of the localized breakover region. The other base portion is in the main current-carrying part of the thyristor in contact with the main emitter. The two base portions are electrically con- nected by current limiting means. When breakover occurs by way of a forward anode-cathode voltage which exceeds the thyristor forward breakover voltage, the rise in current is limited by the current limiting means. - 1 -

332272

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