Ni-Cr alloy thin film igniter with low ignition voltage and preparation method thereof

Abstract

The invention discloses a Ni-Cr alloy thin film igniter with a low ignition voltage and a preparation method thereof and belongs to the technical field of a priming system. The Ni-Cr alloy thin film igniter with the low ignition voltage comprises a base; an isolating film is arranged on the base; an igniting element is arranged on the isolating film; the igniting element is provided with a bonding pad area of an igniter lead wire; and the igniting element is made of Ni-Cr alloy. According to the preparation method provided by the invention, the igniter is prepared by using a micro-machining technology. In the Ni-Cr alloy thin film igniter, the ignition is reliably realized at a lower ignition voltage; the ignition voltage is as low as 4.8 V / 10 muF and the ignition energy is as low as 100 mJ; and the shake-proof performance is good.

Description

technical field [0001] The invention belongs to the technical field of pyrotechnics, and relates to an alloy film bridge igniter based on micromachining technology and a preparation method thereof. More specifically, the present invention relates to an igniter whose igniter element is composed of Ni-Cr alloy film bridges and can reliably fire at relatively low igniting voltage and energy. Background technique [0002] Electrical explosives mainly include bridge wire electrical explosives and film bridge electrical explosives. The film bridge pyrotechnics include semiconductor bridge pyrotechnics, metal film bridge pyrotechnics and explosive film bridge pyrotechnics. The bridge wire pyrotechnic device is an ignition method commonly used by people. It is composed of a suspended resistance heating wire and two electrodes. This technology mainly has the following disadvantages: [0003] a) The process consistency level in the production of the bridge wire igniter is poor, and ...

AI Technical Summary

Problems solved by technology

[0003] a) The process consistency level in the production of the bridge wire igniter is poor, and the performance of the igniter cannot be accurately predicted during use;

[0004] b) In a strong vibration environment, the radial stretching effect of the bridge wire is likely to cause the deformation of the bridge wire, which may cause the breakage of the bridge wire and the cracking and desoldering of the solder joints, resulting in the igniter not working normally and reducing the bridge wire ignition. level of device reliability;

[0005] c) The bridge wire igniter cannot meet the requirements of low ignition energy and rapid ignition

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