# US 2023/0264261 A1 · Manufacturing method of thermal paste

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- Number: US 2023/0264261 A1
- Document ID: US20230264261A1
- Status: Published application
- Kind: A1
- Application number: 17/958,025
- Filed: 2022-09-30
- Published: 2023-08-24
- Earliest claimed: 2022-02-18
- Assignees: ASUSTeK COMPUTER INC.
- Applicants: Asustek Computer Inc.
- Inventors: Fei Lin YANG; Ing-Jer CHIOU
- Web page: https://patentgrep.com/patent/US20230264261A1

## CPC

- B22F 9/08: by casting, e.g. through sieves or in water, by atomising or spraying (using electric discharge B22F9/14)
- C22C 1/0483: {Alloys based on the low melting point metals Zn, Pb, Sn, Cd, In or Ga}
- B22F 1/102: Metallic powder coated with organic material
- B22F 1/105: containing inorganic lubricating or binding agents, e.g. metal salts
- B22F 1/107: containing organic material comprising solvents, e.g. for slip casting
- B22F 1/108: {Mixtures obtained by warm mixing}
- B22F 1/14: Treatment of metallic powder (mixing with lubricating or binding agents or with organic material B22F1/10)
- B22F 1/147: {Making a dispersion}
- B22F 2301/30: Low melting point metals, i.e. Zn, Pb, Sn, Cd, In, Ga
- B22F 2302/45: Others, including non-metals
- F28F 2013/001: {Particular heat conductive materials, e.g. superconductive elements}
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A manufacturing method of thermal paste is provided. The manufacturing method includes: providing a base material; heating a metal material to a liquid state, to generate a liquid metal material; sieving the liquid metal material to generate a metal powder material; adding a dispersant to the metal powder material and mixing to generate a mixed powder material; and mixing the mixed powder material and the base material.

## Claims

### Claim 1

A manufacturing method of thermal paste, comprising:
providing a base material;
heating a metal material to a liquid state, to generate a liquid metal material;
sieving the liquid metal material to generate a metal powder material;
adding a dispersant to the metal powder material and mixing to generate a mixed powder material; and
mixing the mixed powder material and the base material.

### Claim 2 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the base material is composed of a silicone material and a solvent.

### Claim 3 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the metal material is selected from a group composed of a gallium indium tin alloy material, an indium tin alloy material, a gallium aluminum alloy material, a gallium bismuth alloy material, a gallium tin alloy material and a gallium indium alloy material.

### Claim 4 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the step of sieving the liquid metal material is using a screen to sieve the liquid metal material, a mesh of the screen ranges from 300 to 1000.

### Claim 5 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein before the step of adding the dispersant to the metal powder material and mixing, the manufacturing method further comprises performing a surface plasma treatment on the metal powder material.

### Claim 6 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the dispersant is a layered silicate clay material.

### Claim 7 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the dispersant is a fluororesin material.

### Claim 8 (depends on 6)

The manufacturing method of thermal paste according to claim 6, wherein the step of adding the dispersant to the metal powder material and mixing comprises grinding and mixing the metal powder material and the layered silicate clay material.

### Claim 9 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the step of mixing the mixed powder material and the base material comprises grinding and mixing the mixed powder material and the base material.

### Claim 10 (depends on 1)

The manufacturing method of thermal paste according to claim 1, wherein the base material is composed of a silicone material, a thermally conductive particle material and a solvent.