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Copper foil graphite film and preparation method thereof

A technology of graphite film and copper foil, applied in chemical instruments and methods, liquid chemical plating, coating, etc., can solve the problem that heat cannot be dissipated in time, and achieve good mechanical properties and good heat dissipation performance

Pending Publication Date: 2022-05-06
江西鸿美新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under high-frequency operating frequency, the heat generated by electronic components accumulates and increases rapidly, and the technical problem that the heat cannot be dissipated in time is becoming more and more obvious.

Method used

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  • Copper foil graphite film and preparation method thereof

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Embodiment Construction

[0019] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0020] Please refer to figure 1 , showing the preparation process of the copper foil graphite film of the present invention, specifically as follows:

[0021] S1, providing a copper foil substrate 10;

[0022] S2, attaching the dry film 20 to the surface of the copper foil substrate 10;

[0023] S3, performing an exposure process on the dry film 20;

[0024] S4, using a developing solution to perform a developing process, so that the exposed part exposes the copper foil substrate 10, and the unexposed part is covered by the dry film 20;

[0025] S5, using electroplating technology to deposit a copper layer on the surface of the exposed copper foil substrate 10 to form a copper pillar 30;

[0026] S6, retreating the dry film 20;

[002...

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Abstract

The invention discloses a copper foil graphite film and a preparation method thereof, and the preparation method comprises the following steps: (1) providing a copper foil substrate, and attaching a dry film to one side of the copper foil substrate; (2) performing an exposure process on the dry film; (3) performing a developing process, exposing the exposed part out of the copper foil substrate, and covering the unexposed part with the dry film; (4) depositing metal on the surface of the copper foil substrate exposed by the exposed part to form a copper column; (5) removing the dry film; and (6) laminating a semi-finished graphite film and one side, containing the copper columns, of the copper foil substrate to obtain the copper foil graphite film. According to the copper foil graphite film prepared by the method, the thermal conductivity in the thickness direction (namely the Z-axis direction) of the copper foil graphite film can be improved, the thermal conductivity in the horizontal direction (namely the X-axis direction and the Y-axis direction) is hardly influenced, and the copper foil graphite film has relatively good mechanical property, stability and bearing property.

Description

technical field [0001] The invention relates to the technical field of graphite film, and more particularly relates to a copper foil graphite film and a preparation method thereof. Background technique [0002] At present, the general existing manufacturing method of graphite heat sink, it first sends PI (Polyimide) film (polyimide film) into a carbonization furnace, with the heating temperature of 1100°C-1300°C, the PI film is Heating and carbonization, the PI film is carbonized to form a PI carbonized sheet; then, the PI carbonized sheet is cooled, and after cooling to room temperature, the PI carbonized sheet is sent into a graphitization furnace, heated at 2800°C-3000°C temperature, the PI carbonized sheet is heated and graphitized, and the PI carbonized sheet is graphitized to form a PI graphite heat sink; after that, the PI graphite heat sink is cooled, and after cooling to room temperature, the thickness is rolled by a calendering device. After the PI graphite heat s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B15/20B32B37/10B32B38/00C23C18/16C23C18/38C23C18/48
CPCB32B9/007B32B9/041B32B15/20B32B37/10B32B38/00C23C18/1603C23C18/38C23C18/48B32B2307/302
Inventor 李金明
Owner 江西鸿美新能源科技有限公司
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