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A kind of preparation method of large size single crystal copper foil

A large-size, copper foil technology is applied in the field of preparing large-size single crystal copper foil, which can solve the problems of high price and small size, and achieve the effects of simple method, reduced manufacturing cost and low cost.

Active Publication Date: 2020-01-21
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the single crystal copper foil on the market is expensive and small in size, it is becoming more and more difficult to meet people's demand for single crystal copper foil, and a simple and affordable preparation method is urgently needed

Method used

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  • A kind of preparation method of large size single crystal copper foil
  • A kind of preparation method of large size single crystal copper foil
  • A kind of preparation method of large size single crystal copper foil

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: A method for annealing polycrystalline copper to prepare single crystal copper foil, comprising the following steps:

[0019] (1), cut one end of the polycrystalline copper foil into a tip and place it flat on the high-temperature-resistant substrate, connect the transmission device, put it into the chemical vapor deposition equipment, and feed inert gas with a flow rate of 300-500 sccm, and then Start to heat up, the inert gas is N 2 or Ar;

[0020] (2) When the temperature rises to 800-1100°C, the polycrystalline copper foil gradually passes through the chemical vapor deposition equipment from the tip to start the annealing process;

[0021] (3) After the growth is completed, cool down to room temperature to obtain a large-size single crystal copper foil.

[0022] Wherein, the tip is formed by removing any corner of the strip-shaped or rectangular copper foil, or removing two adjacent corners along the width direction of the copper foil at the same tim...

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Abstract

The invention provides a large-size single crystal copper foil preparation method, wherein a polycrystalline copper foil is used as a raw material, one end is cut into a tip, and the large-size singlecrystal copper foil is prepared by using a special annealing process. According to the present invention, with the method, the problem of the high price of the single crystal copper foil is solved; and the preparation of the large-size single crystal copper foil is achieved through the simple method.

Description

technical field [0001] The invention relates to a preparation method of large-size single crystal copper foil. Background technique [0002] Copper is a non-ferrous metal closely related to human beings. Because of its good electrical conductivity, thermal conductivity, extensibility and corrosion resistance, it is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields. It is second only to aluminum in the consumption of non-ferrous metal materials in China. Copper is a red metal and also a green metal. It has a low melting point and is easily remelted and resmelted, making it relatively cheap to recycle. [0003] Compared with polycrystalline copper, single crystal copper has many advantages: 1. Since there is no grain boundary, the conductivity of single crystal copper will be better. 2. Since there is no grain boundary, the mechanical properties of single crystal copper will be better, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B1/02C30B29/02C22F1/08
CPCC22F1/08C30B1/02C30B29/02
Inventor 徐小志张智宏吴慕鸿俞大鹏王恩哥刘开辉
Owner PEKING UNIV
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