Safety device for protecting semiconductor components against ex

Details Safety device for protecting semiconductor components against ex Safety device for protecting semiconductor components against ex

1979-01-29

1980-06-10

Clawson, Jr., Joseph E.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

357 56, 307252K, H01L 2974

Patent

active

042075840

ABSTRACT:
A safety device for protecting a controllable high power semiconductor component having an anode, a cathode, and a control electrode, against excessive voltage rise rates dU/dt and comprising: a semiconductor body having at least four sequential zones of alternating and opposite conductivity type, the second sequential zone being provided with a high concentration region having a higher concentration of conductivity type determining impurities than the rest of the second sequential zone; a first emitter electrode contacting the first of the four sequential zones of the semiconductor body and adapted to be connected to the control electrode of the controllable high power semiconductor component; a second emitter electrode contacting the fourth of the four sequential zones of the semiconductor body and adapted to be connected to the anode of the controllable high power semiconductor component; a gate electrode contacting the high concentration region of the second sequential zone of the semiconductor body; and an ohmic conductor connected between the first emitter electrode and the gate electrode.

REFERENCES:
patent: 3641404 (1972-02-01), Svedberg

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