Voltage-protected semiconductor bridge igniter elements

Details Voltage-protected semiconductor bridge igniter elements Voltage-protected semiconductor bridge igniter elements

1997-12-05

1999-11-30

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

Accidental fuse ignition prevention means

1022025, 1022027, F42C 1908

Patent

active

059923261

ABSTRACT:
A semiconductor bridge igniter device (10) having integral voltage anti-fuse protection provides an electric circuit including a firing leg and, optionally, a monitor leg. The firing leg comprises semiconductor pads (14a, 14b) separated and connected by a bridge (14c) and having metallized lands (16a, 16b) disposed over the pads (14a, 14b) so that an electrical potential applied across the metallized lands (16a, 16b) will cause sufficient current to flow through the firing leg of the electric circuit to release energy at the bridge (14c). A dielectric layer (15) is interposed within the firing leg and has a breakdown voltage equal to a selected threshold voltage (V.sub.th) and therefore provides protection against the device functioning at voltages below the threshold voltage (V.sub.th). A continuity monitor leg of the electric circuit is comprised of either a fusible link (34) or a resistor (36) disposed in parallel to the firing leg.

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