High impedance semiconductor bridge detonator

F - Mech Eng,Light,Heat,Weapons – 42 – C

Patent

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F42C 19/12 (2006.01) F42B 3/13 (2006.01)

Patent

CA 2279924

A detonator (10) contains an SCB initiator assembly (35) in initiation relation to an ignition charge (18). The SCB initiator assembly (35) contains an initiator element (36) having a bridge (60) of semiconductor material between two conductive lands (62a, 62b). The bridge (60) provides a resistance of at least about 50 oms and has a volume between 48,600 cubic microns and 600,000 cubic microns with a typical thickness of two microns. A firing current of more than 200 milliamp provided to the initiator assembly (35) via input leads (26a, 26b) causes the bridge (60) to initiate the ignition charge (18).

Le détonateur (10) de cette invention comprend un ensemble amorce (35) à base de pont semi-conducteur assurant l'allumage d'une charge d'amorce (18). L'ensemble amorce (35) à base de pont semi-conducteur contient un élément amorce (36) comportant un pont (60) en matériau semi-conducteur, disposé entre deux dépôts conducteurs (62a, 62b). Le pont (60) assure une résistance égale ou supérieure à environ 50 ohms et représente un volume compris entre 48 600 et 600 000 micromètres cube, son épaisseur étant généralement égale à deux micromètres. Sous l'effet d'un courant de mise à feu supérieur à 200 milliampères, fourni à l'ensemble amorce (35) à travers des fils conducteurs d'entrée (26a, 26b), le pont (60) allume la charge d'amorce (18).

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