Quantic Industries, Inc.

Martin Gerald Richman

William David Fahey

David S Whang

John G Richards

Mark Lucas Avory

Charles John Piper, Iii

Stewart Shannon Fields

Charles Joyce Moore, Jr

Albert J Baggett, Jr

Kenneth E Willis

Lawrence Theodore Weinman

Terry Joseph Pink

This invention discloses a method of fabricating an electroexplosive device which utilizes a semiconductor bridge as an ignition element. The semiconductor bridge is electrically connected to a metal header by a small, low resistance contact to the extension of bridge material and through an insulating silicon substrate to an eutectic bond created by gold plating on the metal header and the silicon. The second electrode of the bridge circuit is connected via wire bonds to one or two conducting pins which penetrate the metal header and are insulated by surrounding glass. A redundant connection via two conducting pins insulated from the header to one electrode of the semiconductor bridge allows a post assembly test of the integrity of the wire bonds, thereby increasing reliability of the device.

Semiconductor bridge explosive device

The invention relates to an electrical initiator which can be used with an automobile air bag or seat belt pretensioner. The initiator comprises a header, a cup, conducting pins, epoxy pin seals, a bridgewire, a primer, and an output charge. In some embodiments, the initiator also includes a director can. The header and the cup are composed of an insulating dielectric material capable of being ultrasonically welded together. The header secures the pins. Each pin is electrically conductive and each is formed with a buttress knurl to form a seal when each pin is inserted into the header. Additionally, the pins are further sealed to the header by an epoxy sealant and the interference fit of the pin to the header. The bridgewire connects the pins together on one side of the header. An electrical signal through the bridgewire generates heat igniting the primer. Primer reacts with the output charge that in turn ignites a solid gas generant that produces gas that fills air bags or activates the gas generator that drives seat belt pretensioners. The primer contacts the bridgewire. The output charge contacts the primer. The output charge is in the cup, and the cup is ultrasonically welded to the header to provide, along with the pin seals, an environmentally secure seal.

Electrical initiator

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Salinas, CA, United States of America

Martin Gerald Richman