Patent ID: 8281718
Filing Date: 2012-10-09
Classification: F42B,Y10T

Abstract:
1. An explosive foil initiator (EFI), comprising: a substrate having a conductive bridge, the bridge having leads connectable to a firing cable; a flyer positioned against the conductive bridge, the flyer being composed of a ceramic material; a barrel having an opening therethrough and positioned against the flyer; and a sleeve including an explosive material positioned therein and positioned against the barrel, with the barrel opening substantially aligned with the explosive material, wherein the sleeve is formed with a radially compliant material adapted to permit radial expansion of the explosive material in a high temperature environment up to 200° C.; wherein the bridge comprises a first, second and third section, said first and second sections comprise conductive lands of material opposing and flanking said third section, said third section comprises a necked down section; wherein the conductive lands of material are deposited thereon and define progressive reductions in volume of conductive material leading into the necked down section; wherein the conductive lands have a thickness in the range of 20-30 microns of deposited copper; wherein the necked down section has a thickness in the range of 1-4 microns of deposited copper; wherein the flyer is comprised of silica material.