Method for manufacturing airtight cavity structure

Abstract

The invention relates to a method of manufacturing an airtight cavity structure and includes the following steps: firstly, a mandrel with a porous structure is manufactured, that is, a porous foam plastic framework is manufactured; secondly, an electric conduction treatment is conducted to the pore wall of the foam pore on the surface of the mandrel and at a predetermined depth under the surface of the mandrel; thirdly, the mandrel is electroformed for the first time and a first metal cast layer is formed on the surface of the mandrel and in the foam pore at the predetermined depth; fourthly, a surface polishing treatment is conducted to the mandrel electroformed for the first time to flatten and smooth the surface; fifthly, the mandrel is electroformed for the second time and a second metal cast layer is formed on the outer surface of the mandrel; sixthly, the mandrel is eliminated and a cavity body with the first metal cast layer as the capillary structure and the second metal cast layer as the shell body is obtained; and finally, an operating fluid is injected into the cavity body and an airtight cavity structure is thus obtained. The manufacturing method has simple manufacturing procedures and can mold an airtight cavity structure with preferable capillary effect.

Description

technical field [0001] The invention relates to a method for manufacturing an airtight cavity structure, in particular to a method for manufacturing an airtight cavity structure that utilizes the principle of phase change to dissipate heat. Background technique [0002] With the rapid development of the computer industry, more and more heat is generated by heating electronic components in notebook computers such as CPU and VGA. However, the shape design of notebook computers is developing in the direction of light, thin, short and small. The space is constantly shrinking, which puts forward higher requirements for the design of the cooling module in the notebook computer. In order to improve the heat exchange efficiency of the heat dissipation module in a small space, one of the methods currently adopted is to use an airtight cavity structure (Vapor Chamber) in the heat dissipation module. [0003] The main advantage of the airtight cavity structure is not only that its hea...

AI Technical Summary

Problems solved by technology

The grooved capillary structure is limited by the manufacturing process, so it cannot form a small enough capillary size, and it is difficult to achieve a satisfactory capillary effect

However, the process of machining the shell and adding sintered metal particle capillary structure makes the manufacturing process more complicated and makes it difficult to guarantee the shape of the airtight cavity structure.

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