Patent ID: 6680668
Filing Date: 2004-01-20
Classification: F42B,Y10T

Abstract:
A fast heat rise resistor comprising:a resistor substrate having a flat surface and an opposite bottom surface; a resistive foil bridge formed from a plated foil having a conductive layer plating side and an opposite foil side; the resistive foil bridge on the top surface of the substrate, the resistive foil bridge having an elevated portion and a contact portion, the elevated portion being separated from and elevated above the top surface of the resistor substrate by a void adapted to be at least partially filled with pyrotechnic material to increase contact between the foil bridge and the pyrotechnic material, the contact portion attached to said top surface of the resistor substrate to support said bridge; a portion of the elevated portion of the resistive foil bridge suspended across the void with the conductive layer plating removed; and a layer of film affixed between the resister substrate and the elevated portion of the foil bridge for partially filling the void and supporting the portion of the elevated portion of the resistive foil bridge suspended over the void.