A method of manufacturing an anti-high overload photodetector housing

Abstract

A method for manufacturing a high-overload-resistant photodetector housing comprise a metal tube housing, a silver-copper-titanium paste and artificial sapphire glass; a sinking table matched with that artificial sapphire glass is arranged in the middle of the top of the metal tube housing; and the artificial sapphire glass is welded and fixed on the sinking table. A metal shell of that inventionis plate with nickel, using silver-copper-titanium paste, a synthetic sapphire glass and a metal shell are weld and fixed by a vacuum high-temperature braze process, Synthetic sapphire glass does notrequire metallization, as that process procedure is reduced, the sol is melted at high temperature, a reliable and stable solid solution is formed between the silver, copper, titanium and nickel layer, thereby for a high-strength welding joint, the photodetector shell manufactured by the method has the advantages of low cost, simple processing technology, strong impact resistance, and overload resistance >= 20, 00g.

Description

technical field [0001] The patent of the present invention relates to a manufacturing method of a high-overload-resistant photodetector casing, in particular to a manufacturing method of a metal-glass sealing structure with high-overload-resistant capability. Background technique [0002] At present, in the fields of military affairs and aerospace, most of the light window glass of domestic photodetector housings still use molybdenum group hard glass (DM305 / DM308), this is because the molybdenum group hard glass and metal shell materials have the same characteristics. With similar expansion coefficients, glass-metal can be directly sintered together by high-temperature welding. However, the high-temperature welding method is likely to cause deformation of the light window glass. At the same time, the strength of the joint formed by sintering is not high. Under the conditions of high acceleration and overload, it is easy to produce destructive defects such as light window fal...

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Problems solved by technology

However, the high-temperature welding method is easy to cause deformation of the light window glass. At the same time, the strength of the joint formed by sintering is not high. Under the conditions of high acceleration and overload, it is easy to produce destructive defects such as light window falling off and breaking.

At present, some research institutes use sapphire as light window glass, vapor-deposit a layer of chromium-nickel alloy on the surface of sapphire glass, plate the detector shell with gold, and then weld the metallized sapphire and shell with gold-tin (AuSn20) solder, but The cost of this process is very high. Although the anti-overload ability has been improved compared with the previous process method, its anti-overload ability cannot meet the requirements of modern guided missiles for high-speed and long-range strikes.

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