Airtight metal packaging structure and manufacturing method

Abstract

The invention provides an airtight metal packaging structure and a manufacturing method, and belongs to the technical field of metal packaging, the airtight metal packaging structure comprises an aluminum alloy box body, a silicon-aluminum sealing element and a multi-pin-core connector, and the side wall of the aluminum alloy box body is provided with a first mounting hole; the silicon-aluminum sealing element is arranged in the first mounting hole, and a second mounting hole is formed in the silicon-aluminum sealing element; and the multi-pin core connector is arranged in the second mounting hole. According to the airtight metal packaging structure provided by the invention, the silicon-aluminum composite material is welded on the part, where the multi-pin core connector is welded, of the aluminum alloy box body in a diffusion welding manner, and the multi-pin core connector is welded to the position of the silicon-aluminum composite material, so that the problem that the thermal expansion coefficients of aluminum alloy and the multi-pin core connector are not matched is solved; meanwhile, as the main body material is the aluminum alloy, the problem of low strength of the silicon-aluminum material is solved, the air tightness of the metal packaging is realized, the strength of the metal packaging is ensured, and the metal packaging structure has a huge application prospect in the metal packaging.

Description

technical field [0001] The invention belongs to the technical field of metal packaging, and in particular relates to an airtight metal packaging structure and a manufacturing method of the airtight metal packaging structure. Background technique [0002] In metal packages, it is often necessary to solder multi-pin connectors. The metal box body is often made of 2-series or 6-series aluminum alloy. The thermal expansion coefficient of the aluminum alloy is 23, while the multi-pin connector is made of Kovar alloy, and the thermal expansion coefficient of Kovar alloy is 5.2. After the multi-pin connector is welded to the aluminum alloy box body, due to the temperature drop, the thermal expansion coefficients of the two are quite different, and the airtightness cannot be guaranteed. Even if the airtightness is good after welding, it will still cause airtightness problems after the temperature cycle environmental test. [0003] At present, there is a solution to replace aluminu...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an airtight metal packaging structure, aiming to solve the problem of poor airtightness of welding of existing aluminum alloy boxes

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