Fabrication method of liquid alloy thermal paste
AssigneeCooler Materials Technology Inc.
InventorsPo-Wen CHENG, Jech-Wei CHEN
Life of this patent
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Abstract
A fabrication method of a liquid alloy thermal paste comprises: a mixing step of mixing a liquid metal and a plurality of solid metals; an alloying step of alloying or eutecticizing the liquid metal and the plurality of solid metals to form a liquid alloy; a filtration step of filtering the liquid alloy to remove impurities therefrom; a reforming step of adding a trace element to the filtered liquid alloy, and stirring the liquid alloy and the trace element to reform to obtain a viscous and paste-like liquid alloy mixture; a dispersing step of dispersing the liquid alloy mixture; and a degassing step of degassing the dispersed liquid alloy mixture to obtain the liquid alloy thermal paste.
Claims8
A fabrication method of a liquid alloy thermal paste, comprising:
- a mixing step of mixing a liquid metal and a plurality of solid metals, the liquid metal including 60 to 80 wt. % of gallium, the plurality of solid metals including 15 to 25 wt. % of indium and 5 to 15 wt. % of tin;
- an alloying step of alloying or eutecticizing the liquid metal and the plurality of solid metals to form a liquid alloy;
- a filtration step of filtering the liquid alloy to remove impurities therefrom;
- a reforming step of adding 0.01 to 0.5 wt. % of a trace element to the filtered liquid alloy, and stirring the liquid alloy and the trace element to reform to obtain a viscous and paste-like liquid alloy mixture, wherein the trace element is one or more elements selected from the group consisting of:
- boron, aluminum, gallium and indium of group IIIA elements,
- carbon, silicon, germanium, tin and lead of group IVA elements,
- nitrogen, phosphorus, arsenic, antimony and bismuth of group VA elements, and
- selenium and tellurium of group VIA elements;
- a dispersing step of dispersing the liquid alloy mixture to uniformly distribute metal particles in the liquid alloy;
- and
- a degassing step of degassing the dispersed liquid alloy mixture to remove gas from the liquid alloy to obtain the degassed liquid alloy mixture as the liquid alloy thermal paste.
A fabrication method of a multi-metal alloy thermal paste, comprising:
- a mixing step of mixing a liquid metal and a plurality of solid metals, the liquid metal including 60 to 80 wt. % of gallium, the plurality of solid metals including 15 to 25 wt. % of indium and 5 to 15 wt. % of tin;
- a ternary alloying step of alloying or eutecticizing the liquid metal and the plurality of solid metals to form a ternary liquid alloy;
- a filtration step of filtering the ternary liquid alloy to remove impurities therefrom;
- a reforming step of adding 0.01 to 0.5 wt. % of a trace element to the filtered ternary liquid alloy, and reforming the ternary liquid alloy and the trace element to obtain a viscous and paste-like liquid alloy mixture, wherein the trace element is one or more elements selected from the group consisting of:
- boron, aluminum, gallium and indium of group IIIA elements,
- carbon, silicon, germanium, tin and lead of group IVA elements,
- nitrogen, phosphorus, arsenic and antimony of group VA elements, and
- selenium and tellurium of group VIA elements,
- a quaternary alloying step of adding 0.05 to 5 wt. % of a metal element of group IVA or VA elements to the liquid alloy mixture, and stirring to form a quaternary liquid alloy;
- a dispersing step of dispersing the quaternary liquid alloy to uniformly distribute metal particles in the quaternary liquid alloy;
- a quintuple alloying step of adding 0.1 to 10 wt. % of copper to the dispersed quaternary liquid alloy and stirring to form a quintuple liquid alloy;
- and
- a degassing step of degassing the quintuple liquid alloy to remove gas from the quintuple liquid alloy to obtain the degassed quintuple liquid alloy as the multi-metal alloy thermal paste.
Dependencies are inferred from the claim text.