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Zinc-containing multiphase liquid metal thermal interface material and preparation method thereof

A technology of thermal interface material and liquid metal, which is applied in the field of heat dissipation materials, can solve problems such as short circuits of microelectronic devices and circuit boards, and achieve the effect of inhibiting fluidity and eliminating droplet leakage

Active Publication Date: 2014-04-23
NINGBO SYRNMA METAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fully molten liquid metal thermal interface material may overflow from the thermal interface during operation, shorting microelectronic devices and circuit boards

Method used

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  • Zinc-containing multiphase liquid metal thermal interface material and preparation method thereof
  • Zinc-containing multiphase liquid metal thermal interface material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] A multi-phase liquid metal thermal interface material is composed of indium, bismuth, tin and zinc, and the weight ratio of each component is 30% bismuth, 10% tin, 20% zinc and 40% indium. The melting point is between 70-120°C. The alloy prepared according to the formula is melted in a vacuum induction furnace and then cast into a casting with a thickness of about 1 mm. Carry out rough rolling, intermediate rolling and finish rolling at lower than 60°C according to the rolling process mentioned above, lubricated with rolling oil, the reduction pass of rough rolling is: 1mm-0.4mm-0.2mm-0.1mm; Rolling: Intermediate rolling of rough-rolled wool, lubricated with rolling oil, and the next pass of intermediate rolling: 0.1mm-0.06mm; Finish rolling: Put the material after intermediate rolling into the finishing mill, and use rolling oil for rolling. Lubricating, the reduction pass of finish rolling is 0.06mm-0.04mm; the alloy foil with a thickness of 0.04mm is finally produce...

Embodiment 2

[0018] A multi-phase liquid metal thermal interface material is composed of indium, bismuth, tin and zinc, and the weight ratio of each component is 40% bismuth, 20% tin, 10% zinc and 30% indium. The melting point is between 70-120°C. The alloy prepared according to the formula is melted in a vacuum induction furnace and then cast into a casting with a thickness of about 1 mm. Carry out rough rolling, intermediate rolling and finish rolling at lower than 60°C according to the rolling process mentioned above, lubricated with rolling oil, the reduction pass of rough rolling is: 1mm-0.4mm-0.2mm-0.1mm; Rolling: Intermediate rolling of rough-rolled wool, lubricated with rolling oil, and the next pass of intermediate rolling: 0.1mm-0.06mm; Finish rolling: Put the material after intermediate rolling into the finishing mill, and use rolling oil for rolling. Lubricating, the reduction pass of finish rolling is 0.06mm-0.04mm; the alloy foil with a thickness of 0.04mm is finally produce...

Embodiment 3

[0020] A multi-phase liquid metal thermal interface material is composed of indium, bismuth, tin and zinc, and the weight ratio of each component is 35% bismuth, 15% tin, 15% zinc and 35% indium. The melting point is between 70-120°C. The alloy prepared according to the formula is melted in a vacuum induction furnace and then cast into a casting with a thickness of about 1 mm. Carry out rough rolling, intermediate rolling and finish rolling at lower than 60°C according to the rolling process mentioned above, lubricated with rolling oil, the reduction pass of rough rolling is: 1mm-0.4mm-0.2mm-0.1mm; Rolling: Intermediate rolling of rough-rolled wool, lubricated with rolling oil, and the next pass of intermediate rolling: 0.1mm-0.06mm; Finish rolling: Put the material after intermediate rolling into the finishing mill, and use rolling oil for rolling. Lubricating, the reduction pass of finish rolling is 0.06mm-0.04mm; the alloy foil with a thickness of 0.04mm is finally produce...

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Abstract

The invention discloses a zinc-containing multiphase liquid metal thermal interface material and a preparation method thereof. The zinc-containing multiphase liquid metal thermal interface material comprises the following components: by weight, 30-40% of bismuth, 10-20% of tin, 10-20% of zinc, and the balance of indium. The multiphase structure liquid metal thermal interface material designed by the invention is a quaternary alloy, is completely in a solid structure at room temperature and rolling temperature, and in a liquid-solid state at working temperature. In the working status, the solid content is about 60%. The multiphase structure liquid metal thermal interface material can maintain the liquid-solid state in a large range of working temperature, can fully inhibit the heated melting fluidity of a low melting point alloy foil, and can eliminate the liquid droplet leak problem. In addition, the thermal interface material thickness remains in the vicinity of 0.04mm, and the liquid phase surface tension can be further used to achieve the anti leakage effect..

Description

technical field [0001] The invention relates to a heat dissipation material, in particular to a zinc-containing multiphase liquid metal thermal interface material and a preparation method thereof. Background technique [0002] Microelectronics technology is developing towards high power, high speed, and miniaturization. The high heat flow generated by related devices must be removed in a timely and efficient manner, so that the working surface temperature of electronic devices can be maintained below its safe operating temperature. Electronic components work at high temperature for a long time, which will seriously reduce the performance of electronic devices, and seriously affect the service life and stability of devices. With the rapid development of microelectronics technology, electronic cooling products continue to diversify through innovation. The thermal interface material is used to fill the gap between the heating body and the cooling body, and acts as a medium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C28/00C22C30/06C09K5/12
Inventor 曹帅刘亚军曹贺全
Owner NINGBO SYRNMA METAL MATERIALS CO LTD
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