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A bridge igniter having a resistance layer which has a given electrical resistance and which can be heated by an electrical current, an electrical insulating layer that is disposed on the resistance layer and has a given thermal conductivity, a reactive layer that is disposed on the insulating layer

A bridge igniter having a resistance layer which has a given electrical resistance and which can be heated by an electrical current, an electrical insulating layer that is disposed on the resistance layer and has a given thermal conductivity, a reactive layer that is disposed on the insulating layer, the insulating layer transmitting the heat that is produced in the resistance layer to the reactive layer, thereby causing the latter to undergo an exothermic reaction, and a pyrotechnic layer that is disposed on or above the reactive layer and that may be set off by the exothermic reaction of the reactive layer.

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1. A bridge igniter comprising:a resistance layer having a given electrical resistance and being heatable by an electrical current;an electrical insulating layer disposed on the resistance layer and having a given thermal conductivity;a reactive layer disposed on the electrical insulating layer, the

1. A bridge igniter comprising:a resistance layer having a given electrical resistance and being heatable by an electrical current;an electrical insulating layer disposed on the resistance layer and having a given thermal conductivity;a reactive layer disposed on the electrical insulating layer, the electrical insulating layer being configured to transmit heat generated in the resistance layer to the reactive layer to cause the reactive layer to undergo an exothermic reaction; anda pyrotechnic layer disposed above the reactive layer, the pyrotechnic layer being configured to be initiated by the exothermic reaction of the reactive layer. 2. The bridge igniter of claim 1, wherein the electrical insulating layer is formed as an oxide layer. 3. The bridge igniter of claim 1, wherein the electrical insulating layer is formed as one of a copper oxide layer and a silicon dioxide layer. 4. The bridge igniter of claim 1, wherein the electrical insulating layer has a thickness of approximately 50 nm to 100 nm. 5. The bridge igniter of claim 1, wherein the resistance layer includes one of palladium and nickel-chromium. 6. The bridge igniter of claim 1, wherein the reactive layer includes one of zirconium and hafnium. 7. The bridge igniter of claim 1, further comprising:an adhesive layer disposed under the resistance layer. 8. The bridge igniter of claim 7, wherein the adhesive layer includes a titanium layer. 9. The bridge igniter of claim 1, wherein the electrical insulating layer is configured to function as an adhesive layer between the resistance layer and the reactive layer. 10. The bridge igniter of claim 1, further comprising:a co-reactant to cooperate with the reactive layer to produce the exothermic reaction. 11. The bridge igniter of claim 10, wherein the electrical insulating layer is configured to function as a co-reactant. 12. The bridge igniter of claim 1, further comprising:a co-reactant disposed on the reactive layer. 13. The bridge igniter of claim 12, wherein the co-reactant includes an oxide layer. 14. The bridge igniter of claim 12, further comprising:a multi-layer structure having a plurality of reactive layers and co-reactants in an alternating sequence, the co-reactants being formed as oxide layers of a material of the corresponding reactive layers. 15. The bridge igniter of claim 1, wherein the electrical insulating layer is configured to function as a diffusion barrier between the resistance layer and the reactive layer. 16. The bridge igniter of claim 1, further comprising:a plurality of electrical contact surfaces connected to the resistance layer to provide electrical power to the resistance layer. 17. The bridge igniter of claim 1, wherein the resistance layer includes gold plates as electrical contact surfaces. 18. The bridge igniter of claim 1, further comprising:a substrate, wherein the bridge igniter is disposed on the substrate. 19. The bridge igniter of claim 18, wherein the substrate includes one of a silicon substrate, a silicon dioxide substrate, a ceramic substrate, a plastic substrate, and an integrated circuit. 20. The bridge igniter of claim 19, wherein the integrated circuit is configured to supply electrical energy to the resistance layer. 21. The bridge igniter of claim 1, wherein the resistance layer is configured in a bridge shape. 22. A method of forming a bridge igniter, the method comprising:arranging an electrical insulating layer having a given thermal conductivity to be disposed on a resistance layer having a given electrical resistance;arranging a reactive layer to be disposed on the electrical insulating layer which is configured to transmit heat generated in the resistance layer by an electric current to the reactive layer to cause the reactive layer to undergo an exothermic reaction; andarranging a pyrotechnic layer to be disposed above the reactive layer, the pyrotechnic layer being configured to be initiated by the exothermic reaction. 23. The method of claim 22, wherein the res istance layer is configured in a bridge shape. 24. A method of initiating a bridge igniter, the method comprising:arranging an electrical insulating layer having a given thermal conductivity to be disposed on a resistance layer having a given electrical resistance;arranging a reactive layer to be disposed on the electrical insulating layer which is configured to transmit heat generated in the resistance layer to the reactive layer to cause the reactive layer to undergo an exothermic reaction;arranging a pyrotechnic layer to be disposed above the reactive layer; andheating the resistance layer by an electric current to generate heat in the electrical insulating layer to cause an exothermic reaction in the reactive layer to initiate the pyrotechnic layer. 25. The bridge igniter of claim 1, further comprising:an adhesive layer disposed between the resistance layer and one of the insulating layer and the reactive layer.