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Preparation method of high-heat-conductivity nanometer copper-graphite film composite material

A composite material and graphite film technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of weakening the heat dissipation effect of graphite film, reducing the thermal conductivity of carbon material layer, and unable to transfer heat in time, so as to achieve good flexibility , excellent heat conduction, simple process effect

Inactive Publication Date: 2018-11-16
JIAXING ZHONGYI CARBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technology can improve the longitudinal Z thermal conductivity of the graphite film to a certain extent, but the use of the adhesive will seriously reduce the thermal conductivity of the carbon material layer, causing the heat emitted by the graphite film to be unable to be transferred to the copper in time, which seriously weakens the graphite film. cooling effect

Method used

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  • Preparation method of high-heat-conductivity nanometer copper-graphite film composite material

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Effect test

Embodiment 1

[0021] A preparation method of a high thermal conductivity nanometer copper-graphite film composite material, comprising the following specific steps:

[0022] (1) Chemically roughen the 10 μm thick graphene heat dissipation film: soak the 10 μm thick graphene heat dissipation film with sodium hydroxide solution, the immersion temperature is 20°C, and the immersion time is 30 minutes. Rinse the graphene heat dissipation film with ion water and dry it. In this step, the concentration of sodium hydroxide solution is 50 g / L; the surface microstructure roughness of the graphene heat dissipation film after chemical roughening treatment increases, and the surface chemical inertia decreases.

[0023] (2) Perform plasma treatment on the roughened graphene heat dissipation film: the plasma treatment is to ionize the gas and directly bombard the surface of the film, the treatment atmosphere is air, the treatment speed is 1m / min, and the treatment 1- 5 times; after treatment, the surface...

Embodiment 2

[0027] A preparation method of a high thermal conductivity nanometer copper-graphite film composite material, comprising the following specific steps:

[0028] (1) Chemically roughen the 100 μm thick graphene heat dissipation film: soak the 100 μm thick graphene heat dissipation film with sodium hydroxide solution, the immersion temperature is 50°C, and the immersion time is 10 minutes, and then remove Rinse the graphene heat dissipation film with ion water and dry it. In this step, the concentration of sodium hydroxide solution is 500 g / L; the surface microstructure roughness of the graphene heat dissipation film after chemical roughening treatment increases, and the surface chemical inertia decreases.

[0029] (2) Perform plasma treatment on the roughened graphene heat dissipation film: the plasma treatment is to ionize the gas and directly bombard the surface of the film, the treatment atmosphere is oxygen, the treatment speed is 10m / min, and the treatment 1- 5 times; after...

Embodiment 3

[0033] A preparation method of a high thermal conductivity nanometer copper-graphite film composite material, comprising the following specific steps:

[0034] (1) The 200 μm thick graphene heat dissipation film was chemically roughened: the 200 μm thick graphene heat dissipation film was soaked with sodium hydroxide solution, the immersion temperature was 90 ° C, the immersion time was 1 min, and then the Rinse the graphene heat dissipation film with ion water and dry it. In this step, the concentration of sodium hydroxide solution is 200 g / L; the surface microstructure roughness of the graphene heat dissipation film after chemical roughening treatment increases, and the surface chemical inertia decreases.

[0035] (2) Perform plasma treatment on the roughened graphene heat dissipation film: the plasma treatment is to ionize the gas and directly bombard the surface of the film, the treatment atmosphere is nitrogen, the treatment speed is 6m / min, and the treatment 1- 5 times; ...

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Abstract

The invention discloses a preparation method of a high-heat-conductivity nanometer copper-graphite film composite material. The preparation method comprises the specific steps of: (1) chemical roughening of graphite films; (2) plasma treatment of the roughened graphite films; (3) copper electroplating of the plasma-treated graphite films; and (4) passivation of the graphite film after copper electroplating; and the high-heat-conductivity nanometer copper-graphite film composite material product is obtained through cleaning and drying after passivation.

Description

technical field [0001] The invention relates to the technical field of heat sinks with high thermal conductivity, in particular to a method for preparing a high thermal conductivity nanometer copper-graphite film composite material. Background technique [0002] Smartphones, tablet computers, etc. have become one of the necessities of people's lives, but in the process of device miniaturization, with the use of huge-scale integrated circuits, the integration scale of components has increased, and the thermal power generated per unit volume has gradually increased. However, devices The heat dissipation area remains unchanged, causing the heat dissipation per unit area to fail to meet the requirements. Therefore, improving the heat dissipation efficiency of electronic devices is crucial to the development of the microelectronics industry. [0003] Macroscopic copper has good electrical conductivity and high thermal conductivity, and is used as heat conduction and heat dissipa...

Claims

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Application Information

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IPC IPC(8): C25D3/38C25D5/54C09K5/14
CPCC09K5/14C25D3/38C25D5/54
Inventor 沈田丰李平陆标
Owner JIAXING ZHONGYI CARBON TECH