Welding method for secondary degassing sealing of ultrathin vapor chamber

Abstract

The invention relates to a welding method for secondary degassing sealing of an ultrathin vapor chamber. The welding method for secondary degassing sealing of the ultrathin vapor chamber comprises the following steps of fixing the ultrathin vapor chamber by using a clamp; performing pressure welding on the sealing position of the ultrathin vapor chamber by using a pressure welding tool; and performing laser welding on the sealing position of the ultrathin vapor chamber by using a laser welding tool. A pressure / laser hybrid welding mode is adopted, the sealing strength of the ultrathin vapor chamber after the pressure welding can meet the requirement for the internal vacuum degree of the ultrathin vapor chamber, and the laser welding secondary sealing procedure continues to be performed on the basis that the sealing strength of the ultrathin vapor chamber is guaranteed through the pressure welding; the problem that the sealing performance of the ultrathin vapor chamber becomes poor after the ultrathin vapor chamber works for a long time is solved, the heat transfer performance of the ultrathin vapor chamber is improved, the machining cost is reduced, and the welding method for secondary degassing sealing of the ultrathin vapor chamber can be used for batch production.

Description

technical field [0001] The invention relates to the technical field of manufacturing ultra-thin vapor chambers, in particular to a welding method for secondary degassing and sealing of ultra-thin vapor chambers. Background technique [0002] With the rapid development of modern technology, all kinds of electronic components are developing towards the trend of miniaturization and high performance. At the same time, the heat flux of electronic components continues to increase, and the ensuing thermal control problems are gradually highlighted. , The continuous rise of the working environment temperature will degrade the performance of electronic components, reduce the reliability and greatly shorten the service life. [0003] The main structure of the ultra-thin vapor chamber includes a bottom plate, an upper cover plate, a liquid-absorbing core structure, a liquid injection pipe and a working medium. As a two-dimensional phase change heat transfer element, the ultra-thin vap...

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Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the object of the present invention is to provide a welding method for the secondary degassing sealing of ultra-thin chambers, which can meet the requirements of the sealing strength of ultra-thin chambers and solve the problem of Solved the problem of poor sealing performance of the ultra-thin vapor chamber after working for a long time, and improved the reliability and service life of the ultra-thin vapor chamber

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