Composite self-heating reflecting layer energy-gathered semiconductor ignition bridge

Abstract

The invention provides a composite self-heating reflecting layer energy-gathered semiconductor ignition bridge which is formed by sequentially superposing a substrate layer, an insulating layer, a reflecting layer, a semiconductor bridge layer, a discrete tin soldering layer and a discrete electrode layer from top to bottom, wherein the substrate layer is composed of rectangular semiconductor silicon; the insulating layer is composed of silica with the same size as the substrate layer and covers the substrate layer; the reflecting layer is made of monocrystalline silicon diffused and doped with heavily boron (or phosphorus), the size of the reflecting layer is the same as that of the substrate layer, and the reflecting layer is deposited on the insulating layer; the semiconductor bridge layer is composed of polycrystalline silicon subjected to heavily boron (or phosphorus) injection doping, and the shape of the semiconductor bridge layer is wide in two ends and narrow in middle; the tin soldering layer is respectively coated on each of two ends of the semiconductor bridge layer; and the electrode layer is directly bonded to the tin soldering layer at a high temperature. The semiconductor ignition bridge disclosed by the invention has the functions of high electric energy utilization rate, high ignition output and high ignition instantaneity.

Description

technical field [0001] The invention belongs to the field of basic components of electrical explosive devices, and relates to a semiconductor ignition bridge, in particular to a semiconductor ignition bridge with a composite self-heating reflective layer for energy gathering. Background technique [0002] Electrical pyrotechnics is a device that converts electrical energy into the initial energy that triggers the combustion, explosion, and work of energetic materials. Nano-manufacturing and integrated integration is an unavoidable task in the field of modern equipment manufacturing and national defense technology to reduce weight, miniaturize, and make smart. MEMS ignition devices not only have the advantages of MEMS small size, large-scale manufacturing, low cost, and high functional integration, but also can greatly reduce the amount of sensitive ignition agents in pyrotechnics, thereby reducing the risk of manufacturing pyrotechnics and the impact on the environment. Pol...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a semiconductor ignition bridge with composite self-heating reflective layer energy gathering, which solves the problem of low ignition energy of the existing semiconductor ignition bridge, and can adapt to micro-fuzes, micro-satellites, micro-propellers and automobile airbag micro-ignition devices needs

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