초록 ▼

An exploding foil initiator is disclosed and is comprised of a substrate having a conductive bridge, a flyer, a barrel adjacent the flyer and an explosive packed sleeve adjacent the barrel. The flyer is comprised of a material which does not become more ductile upon a rise in temperature, for exampl

An exploding foil initiator is disclosed and is comprised of a substrate having a conductive bridge, a flyer, a barrel adjacent the flyer and an explosive packed sleeve adjacent the barrel. The flyer is comprised of a material which does not become more ductile upon a rise in temperature, for example a silicon dioxide material. The sleeve is comprised of a thermally compliant material, such as a silicone. The bridge is provided with a necked down section having a defined thickness which is less than the remainder of the bridge deposition.

대표청구항 ▼

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 agai

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; anda 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. 2. The EFI of claim 1, wherein the flyer is silicon dioxide. 3. The EFI of claim 1, wherein the sleeve is comprised of silicone. 4. A method of making an explosive foil initiator (EFI), comprising the steps of: providing a substrate having a conductive bridge with leads connectable to a firing cable;providing a flyer composed of a ceramic material;positioning the ceramic flyer against the conductive bridge;providing a barrel having an opening therethrough;positioning the barrel against the flyer;providing a sleeve;depositing an explosive material in the sleeve; andpositioning the sleeve 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 conductive lands of material flanking the 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 provided as a silica material. 5. The EFI of claim 4, wherein the flyer is provided as a silicon dioxide material. 6. The EFI of claim 4, wherein the sleeve is provided as a silicone. 7. A method of using an explosive foil initiator (EFI), comprising the steps of: providing a substrate having a conductive bridge with leads connectable to a firing cable;providing a flyer;positioning the flyer against the conductive bridge;providing a barrel having an opening therethrough;positioning the barrel adjacent to the flyer;positioning a radially expandable sleeve;positioning an explosive material within said radially expandable sleeve and adjacent the barrel opening, 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.; andallowing the explosive material to radially expand upon rising temperature;wherein the bridge comprises conductive lands of material flanking the 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 provided as a silica material. 8. The method of claim 7, wherein the radially expandable sleeve is provided as a silicone material. 9. The method of claim 7, wherein the flyer is provided as a silicon dioxide material. 10. An explosive foil initiator (EFI), comprising: a substrate having a conductive bridge, the bridge having leads connectable to a firing cable, the bridge having conductive lands having a first thickness of conductive material extending towards a center of the substrate, and a necked down section having a second and reduced thickness of material;a flyer positioned against the conductive bridge and overlying the necked down section, the flyer being composed of a material that exhibits less than a 10% increase in ductility at 200° C.;a barrel having an opening therethrough and positioned against the flyer; anda 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 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. 11. The EFI of claim 10, wherein the flyer is silicon dioxide.