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Ultrathin flexible vapor chamber and preparation method thereof

A vapor chamber and flexible technology, applied in the field of ultra-thin flexible vapor chamber and its preparation, can solve the problems of vapor chamber performance deterioration, vacuum degree increase, water and oxygen penetration, etc., and achieve improvement of degradation or even failure. Implementation method Simple, guarantee the effect of flexible functional features

Pending Publication Date: 2022-05-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polymer matrix is ​​composed of macromolecular chains, which is prone to the problem of water and oxygen penetration, and the vapor chamber requires high vacuum to cycle. Once excessive gas permeation occurs, the vacuum degree will rise sharply, and the performance of the vapor chamber will deteriorate or even fail. , the contradiction between the two is difficult to reconcile

Method used

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  • Ultrathin flexible vapor chamber and preparation method thereof
  • Ultrathin flexible vapor chamber and preparation method thereof
  • Ultrathin flexible vapor chamber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, an ultra-thin flexible vapor chamber includes: a lower shell 1, an airway structure layer, a liquid injection pipe 3, a working fluid 4, a first connecting layer 5 (welding layer), a liquid-absorbing core 6, and an upper shell Body 7 and flexible second hermetic encapsulation layer 8. The airway structure layer is placed above the lower shell 1, the liquid-absorbing core 6 is closely attached to the airway structure layer, the first connecting layer 5 reserves the position of the liquid injection pipe 3, and the upper and lower shells are completed once through the first connecting layer 5 Sealed connection, and the second sealing packaging layer 8 is deposited through the reserved size difference between the upper and lower casings to complete the secondary protection packaging. Finally, the working medium 4 is poured with deionized water, and the interior is vacuumed to realize the ultra-thin flexible vapor chamber.

[0036] Such as figu...

Embodiment 2

[0048] The preparation steps are substantially the same as in Example 1, except that:

[0049] In step S1, aluminum-plastic film is selected as the housing material, and the thickness is 0.1 mm.

[0050] In step S2, the stainless steel wire mesh is selected as a template to transfer to form the PDMS airway structure layer 22, the thickness of the stainless steel wire mesh is 0.2mm, and the number of meshes is 50 mesh. The transfer process is as follows:

[0051] (1) Prepare the main glue B glue and curing agent A glue required for PDMS, and mix them evenly according to the weight ratio of 10:1.

[0052] (2) The mixed PDMS colloid was vacuumed and rotated for 5 minutes in a vacuum degassing machine.

[0053] (3) Prepare a stainless steel wire mesh, cut it to an appropriate size, and clean it ultrasonically for 5 minutes with acetone, isopropanol, and absolute ethanol in sequence.

[0054] (4) Scrape-coat the PDMS colloid on the surface of the stainless steel wire mesh, and p...

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Abstract

The ultrathin flexible vapor chamber comprises a lower shell, an air channel structure layer, a liquid injection pipe, a working medium, a first connecting layer, a liquid absorption core, an upper shell and a second sealing packaging layer. The upper shell and the lower shell are made of metal polymer composite materials, the metal surfaces face inwards, and size difference is reserved; a first connecting layer is arranged at the joint of the upper shell and the lower shell, and the upper shell and the lower shell are hermetically connected once through the first connecting layer; a second sealing packaging layer is arranged outside the first connecting layer, covers the reserved size difference of the upper shell and the lower shell and completely wraps and protects the upper shell to complete secondary protection packaging. The vapor chamber has the ultra-thin characteristic, the metal polymer composite film is combined with a secondary external packaging scheme, the flexible functional characteristic of the vapor chamber is guaranteed, and the technical problem that the vapor chamber is degraded or even fails due to water and oxygen permeation of a polymer matrix vapor chamber is solved. The invention further relates to a preparation method of the ultrathin flexible vapor chamber, and the preparation method is simple to implement and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of heat pipes, in particular to an ultra-thin flexible vapor chamber and a preparation method thereof. Background technique [0002] The development trend of electronic devices lies in the improvement of integration and the enhancement of performance. High heat flow, small space, and ultra-thin have become the inevitable trend of the development of electronic device heat dissipation technology. In recent years, in addition to the integration of extreme space, the technology of flexible electronic devices has developed rapidly. Flexible electronic devices put forward new flexible requirements for heat dissipation systems. [0003] As a passive phase change heat element, the vapor chamber adopts liquid phase change heat transfer technology, which rapidly spreads heat to the entire surface through phase change. It has the advantages of strong heat dissipation capacity, small heat transfer temperature differen...

Claims

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Application Information

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IPC IPC(8): F28D15/04H05K7/20
CPCF28D15/04F28D15/046H05K7/20336
Inventor 颜才满汤勇张仕伟丁鑫锐袁雪鹏刘杭黄皓熠
Owner SOUTH CHINA UNIV OF TECH
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