A kind of 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: 2016-04-27
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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  • A kind of zinc-containing multiphase liquid metal thermal interface material and preparation method thereof
  • A kind of zinc-containing multiphase liquid metal thermal interface material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] A multiphase liquid metal thermal interface material composed of indium, bismuth, tin and zinc, and the weight percentage 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 finishing rolling at less than 60℃ according to the rolling process described above, lubricated with rolling oil, and the reduction pass of rough rolling is: 1mm-0.4mm-0.2mm-0.1mm; Rolling: The rough-rolled material is mid-rolled and lubricated with rolling oil. The lower pass of the mid-rolling is: 0.1mm-0.06mm; finishing rolling: Put the mid-rolled material into the finishing mill and use rolling oil The reduction pass of lubrication and finishing rolling is 0.06mm-0.04mm; the alloy foil with a thickness of 0.04mm is finally obtained. The liquid-solid...

Embodiment 2

[0018] A multiphase liquid metal thermal interface material composed of indium, bismuth, tin and zinc, and the weight percentage 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 finishing rolling at less than 60℃ according to the rolling process described above, lubricated with rolling oil, and the reduction pass of rough rolling is: 1mm-0.4mm-0.2mm-0.1mm; Rolling: The rough-rolled material is mid-rolled and lubricated with rolling oil. The lower pass of the mid-rolling is: 0.1mm-0.06mm; finishing rolling: Put the mid-rolled material into the finishing mill and use rolling oil The reduction pass of lubrication and finishing rolling is 0.06mm-0.04mm; the alloy foil with a thickness of 0.04mm is finally obtained. The liquid-solid...

Embodiment 3

[0020] A multiphase liquid metal thermal interface material composed of indium, bismuth, tin and zinc, and the weight percentage 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 finishing rolling at less than 60℃ according to the rolling process described above, lubricated with rolling oil, and the reduction pass of rough rolling is: 1mm-0.4mm-0.2mm-0.1mm; Rolling: The rough-rolled material is mid-rolled and lubricated with rolling oil. The lower pass of the mid-rolling is: 0.1mm-0.06mm; finishing rolling: Put the mid-rolled material into the finishing mill and use rolling oil The reduction pass of lubrication and finishing rolling is 0.06mm-0.04mm; the alloy foil with a thickness of 0.04mm is finally obtained. The liquid-solid...

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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 flux generated by related devices must be removed in time and efficiently, so that the working surface temperature of electronic devices is maintained below its safe working temperature. Electronic components working under high temperature for a long time will seriously reduce the working performance of electronic devices and seriously affect the service life and stability of the devices. With the rapid development of microelectronics technology, electronic cooling products continue to diversify through innovation. Thermal interface materials are used to fill the gap between the heating element and the radiator, and play a medium that improves the h...

Claims

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Application Information

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Patent Type & Authority Patents(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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