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Structure of thermal fin with high heat conductivity and its manufacturing method

A technology with high thermal conductivity and heat sink, applied in semiconductor devices, semiconductor/solid-state device components, electrical components, etc., it can solve the problems of limited thermal conduction efficiency, inability to meet the heat dissipation requirements of higher-speed central processing units, and high proportion of copper alloy heat sinks , to achieve the effect of reducing weight

Inactive Publication Date: 2003-12-24
富骅企业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, although the main structure of the current heat sink can be processed into various shapes by drawing and extruding copper and aluminum alloys, the heat conduction efficiency of the structure itself is still limited, and it cannot meet the heat dissipation requirements of higher-speed central processing units. In particular, although the heat conduction efficiency of copper alloy radiators is better than that of aluminum alloy radiators, the overall proportion of copper alloy radiators is higher than that of aluminum alloy radiators, which does not meet the needs of lightweight computers

Method used

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  • Structure of thermal fin with high heat conductivity and its manufacturing method
  • Structure of thermal fin with high heat conductivity and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The aluminum alloy adopts AlMgSi, and the composition of the aluminum alloy is:

[0020] Si

Fe

Cu

mn

Mg

Cr

Zn

Al

0.6

0.35

0.1

0.1

0.75

0.1

0.1

97.9

[0021] Silicon carbide accounts for 10% by weight of the overall heat sink, and the particle size of silicon carbide is 80 μm. The specific method is as follows:

[0022] 1. Heat the aluminum alloy to 660-720°C in a melting furnace, and make sure that the aluminum alloy is completely in a liquid state.

[0023] 2. Carry out slag removal work to remove impurities in aluminum alloy.

[0024] 3. Add ceramic particles.

[0025] 4. Stir the molten soup with a stirring rod at the solid-liquid phase temperature, and keep the temperature of the molten soup at 550-700°C.

[0026] 5. Use the robotic arm to scoop up the evenly stirred molten soup and inject it into the injection system of the die-casting equipment for injection and forming. Th...

Embodiment 2

[0029] The aluminum alloy adopts AlMgSi, and the composition of the aluminum alloy is the same as that in Example 1.

[0030] Silicon carbide accounts for 25% by weight of the overall heat sink, and the particle size of silicon carbide is 120 μm. The specific method is as follows:

[0031] 1. The melting furnace heats the aluminum alloy to 660-720°C, and confirms that the aluminum alloy is completely in a liquid state.

[0032] 2. Carry out slag removal work to remove impurities in aluminum alloy.

[0033] 3. Add ceramic particles.

[0034] 4. Stir the molten soup with a stirring rod at the solid-liquid phase temperature, and keep the temperature of the molten soup at 550-700°C.

[0035] 5. Use the robotic arm to scoop up the evenly stirred molten soup and inject it into the injection system of the die-casting equipment for injection and forming. The clamping force of the die-casting machine is 200-250ton, and the casting area pressure during injection is 150-250Kg / cm 2 ...

Embodiment 3

[0038] The aluminum alloy adopts AlMgSi, and the composition of the aluminum alloy is the same as that in Example 1.

[0039] Silicon carbide accounts for 60% by weight of the overall heat sink, and the particle size of silicon carbide is 320 μm. The specific method is as follows:

[0040] 1. The melting furnace heats the aluminum alloy to 700-760°C, and confirms that the aluminum alloy is completely in a liquid state.

[0041] 2. Carry out slag removal work to remove impurities in aluminum alloy.

[0042] 3. Add ceramic particles.

[0043] 4. Stir the molten soup with a stirring rod at the solid-liquid phase temperature, and keep the temperature of the molten soup at 590-630°C.

[0044] 5. Use the robotic arm to scoop up the evenly stirred molten soup and inject it into the injection system of the die-casting equipment for injection and forming. The clamping force of the die-casting machine is 200-250ton, and the casting area pressure during injection is 150-250Kg / cm 2 ...

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Abstract

Shearing strength generated by stirring breaks or destroys dendritical primary crystal in solid / liquid two phases area of aluminum alloy so as to form melted soup containing spherical solid broken pieces. Then, ceramics grains are added into the melted soup and the solid particles in the liquid phase metal are utilized to disperse the ceramics grains. Under the action of continuous stirring, the aluminum alloy is turned to small and non-branched structure, becoming the compact mixed liquor of ceramics / aluminum alloy. Finally, the construction shape of the thermal fins is made by die-casting process. In the invention, plasticity of aluminum alloy and high heat conductivity of ceramics grains give the shape and good heat radiating effect of the thermal fins.

Description

technical field [0001] The present invention relates to a heat sink structure with high heat conduction and its manufacturing method, in particular to a heat sink structure with light weight and higher heat conduction than traditional copper / aluminum alloys, which can be directly completed by die-casting The structural shapes of various heat sinks are used for heat dissipation of high heat sources such as central processing units. Background technique [0002] Press, as the speed of the central processing unit continues to increase, while the power increases, the heat source generated by the operation of the central processing unit also continues to rise. At present, the radiator used by the central processing unit of a general computer is mainly The heat source of the central processing unit is dissipated by heat conduction, so the main body of the heat sink is formed with cooling fins at appropriate intervals, and the area in contact with the air is increased by the settin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/373
Inventor 陈永征黄传政童全庆叶佳祯
Owner 富骅企业股份有限公司
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