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Vapor chamber with high heat absorptivity and preparation method thereof

A soaking plate and heat-absorbing technology, applied in the direction of metal material coating process, etc., can solve the problems of unstable coating, deformation of soaking surface, easy falling off of nickel layer, etc., to achieve excellent corrosion resistance and appearance performance, excellent Corrosion resistance and the effect of preventing the protective layer from peeling off

Active Publication Date: 2021-09-28
北京酷捷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of the vapor chamber, it is directly or indirectly in contact with the hot end parts, and its surface temperature is relatively high (the temperature is generally greater than 40°C during operation). Due to the poor corrosion resistance of copper and copper alloys, the vapor chamber is used After a period of time, the surface will be oxidized, and the color will become darker and flowery, resulting in poor appearance
At the same time, after long-term use, due to the oxidation of the surface, the copper sheet of the vapor chamber will be corroded and intensified, which will eventually lead to leakage and failure of the vapor chamber. Later, one of the important reasons for the obvious slowdown of the mobile phone due to the obvious increase in the rate of defective products of the vapor chamber, the existing manufacturing process of the vapor chamber is as follows: figure 1 shown
[0003] Nickel plating refers to the method of plating a layer of nickel on metal or some non-metals by electrolytic or chemical methods. In the prior art, there is also a related technology of nickel plating on the surface of copper alloys to enhance its corrosion resistance and oxidation resistance, but The traditional method is simply electroplating or electroless nickel plating on the surface of copper alloy. The defect of this method is that the plating layer is extremely unstable and easy to cause shedding. Although nickel plating can increase the corrosion resistance and oxidation resistance of copper alloy to a certain extent, the nickel layer The ease of falling off also makes it difficult to promote the use of large areas
[0004] In addition, copper and copper alloys are generally soft and have low surface hardness, which can easily lead to deformation of the soaking surface and affect performance
Copper alloy The low hardness of copper alloy also affects the overall thickness of the vapor chamber, which is difficult to continue to reduce
At present, all copper alloy vapor chamber products on the market are copper-colored, and there is no copper alloy vapor chamber product with a dark appearance that has high heat absorption and high corrosion resistance

Method used

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  • Vapor chamber with high heat absorptivity and preparation method thereof
  • Vapor chamber with high heat absorptivity and preparation method thereof
  • Vapor chamber with high heat absorptivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A vapor chamber with high heat absorption. The vapor chamber includes a base layer and a protective layer. The protective layer is attached and cured on the outer surface of the base layer to enhance the oxidation resistance of the base layer.

[0073] The protective layer is blackened nickel plating, or black nickel plating.

[0074] The thickness of the protective layer is 0.1μm-10μm;

[0075] In the described blackening treatment nickel plating layer, the blackening treatment adopts the mode of blackening after pickling first, and the pickling liquid selection concentration is the aqueous hydrochloric acid solution of 5%-20%, and the blackening liquid selection counts according to mass ratio (1-3 ): (2-4): (1-3): (0-6) the mixed solution of sodium hydroxide, sodium nitrate, sodium nitrite and water;

[0076] The color range of the protective layer is: L value ≤ 3, a value -1.5 ~ 1.5, b value -1 ~ 1;

[0077] In the described black nickel coating, the plating soluti...

Embodiment 2

[0088] A vapor chamber with high heat absorption. The vapor chamber includes a base layer and a protective layer. The protective layer is attached and cured on the outer surface of the base layer to enhance the oxidation resistance of the base layer. It also includes a transition layer. The transition layer is adhered and cured between the base layer and the protective layer, and is used to strengthen the cured connection between the base layer and the protective layer.

[0089] The transition layer is a nickel-chromium-tin plating layer, and the transition layer forms a nickel-chromium-tin-copper alloy with the outer surface of the base layer through alloying treatment.

[0090] The thickness of the transition layer is 0.1 μm-10 μm; the composition of the transition layer is 10%-28% by mass percentage, the nickel content is 72%-85%, and the tin content is 0%-5%; the alloying treatment adopts high temperature alloying Treatment method or low temperature oscillation alloying he...

Embodiment 3

[0107] A vapor chamber with high heat absorption. The vapor chamber includes a base layer and a protective layer. The protective layer is attached and cured on the outer surface of the base layer to enhance the oxidation resistance of the base layer.

[0108] The protective layer is blackened nickel plating with a thickness of 1 μm;

[0109] In the blackening treatment of the nickel coating, the blackening treatment adopts the method of pickling first and then blackening, the pickling solution is 5% hydrochloric acid aqueous solution, and the blackening solution is selected according to the mass ratio of 1:2:1:

[0110] 6 mixed solution of sodium hydroxide, sodium nitrate, sodium nitrite and water;

[0111] The color range of the protective layer is: the L value is 2, the a value is 0, and the b value is 0.5;

[0112] The base layer is phosphor-bronze alloy, and the content of copper element is greater than 90% by mass percentage, wherein tin is 5.5%, phosphorus is 0.35%, and...

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Abstract

The invention provides a vapor chamber with high heat absorptivity, which comprises a matrix layer and a protective layer, and the protective layer is adhered and cured on the outer surface of the matrix layer, is dark in color and is used for enhancing the oxidation resistance and heat conductivity of the vapor chamber. The invention further discloses a preparation method of the vapor chamber. The vapor chamber has the characteristics and advantages that the deep color protective layer is formed on the surface of a base body layer of the vapor chamber through the surface treatment method, and the corrosion resistance, the oxidation resistance and the heat conduction performance of the vapor chamber can be effectively improved. The problems that an existing product is not resistant to corrosion, and the appearance becomes poor due to corrosion after long-term use are solved. The vapor chamber further comprises a transition layer solidified between the base body layer and the protective layer, the transition layer can be subjected to co-permeation with the base body layer and the protective layer, the surface hardness of the vapor chamber is improved, the problem that a copper and copper alloy vapor chamber is prone to deformation is solved, the base body layer, the transition layer and the protective layer which are subjected to co-permeation are completely fused into a whole, and the problem that the protective layer is easy to fall off is effectively solved.

Description

technical field [0001] The invention relates to electronic devices, in particular to a cooling device for electronic devices, in particular to a vapor chamber with high heat absorption and a preparation method thereof. Background technique [0002] Vapor chamber products have been widely used in the heat dissipation of consumer electronics products, and currently mainly copper alloy vapor chambers. The appearance of copper alloy products is copper (including brass, red copper, etc.). During the use of the vapor chamber, it is directly or indirectly in contact with the hot end parts, and its surface temperature is relatively high (the temperature is generally greater than 40°C during operation). Due to the poor corrosion resistance of copper and copper alloys, the vapor chamber is used After a period of time, the surface will be oxidized and the color will become darker and flowery, resulting in poor appearance. At the same time, after long-term use, due to the oxidation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/34C25D5/50C25D7/00C23C22/63C23G1/02
CPCC25D3/562C25D5/34C25D5/50C25D7/00C23G1/02C23C22/63
Inventor 沈伟
Owner 北京酷捷科技有限公司
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