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Method for simply and selectively preparing single crystal copper foil

A selective, copper foil technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problem of making full use of unfavorable resources and meet the needs of industrialization, and it is difficult to achieve selective preparation of various single crystal copper foils, The problem of preparing low crystal plane index single crystal copper foil, etc., achieves the effect of large-scale industrial application prospects, short preparation period and good surface flatness

Active Publication Date: 2020-12-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of multiple copper oxidation states is easy to form high-index crystal planes, so it is difficult to selectively prepare single-crystal copper foil with a single low crystal plane index
[0007] Generally speaking, most of the current processes for preparing single crystal copper foil can only realize its single preparation, and it is difficult to realize the selective preparation of various single crystal copper foils, and the prepared single crystal copper foils are not high in purity and unevenly distributed. The equipment is complicated and the operation is cumbersome, which is not conducive to realizing the full utilization of resources and meeting the needs of industrialization

Method used

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  • Method for simply and selectively preparing single crystal copper foil
  • Method for simply and selectively preparing single crystal copper foil
  • Method for simply and selectively preparing single crystal copper foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) To clean the copper foil, soak the polycrystalline copper foil with a diagonal size of 3 inches (thickness 25 μm) for 5 minutes with a mixed solution of alcohol, acetic acid, and deionized water with a volume ratio of 1:1:1, and then use pure Rinse with deionized water for 2-3 times, and finally dry the copper foil with nitrogen;

[0036] (2) Sample injection, place the dried copper foil on a flat quartz plate, and slowly push it into the main temperature zone of the tube furnace;

[0037] (3) Wash the air, place the sample properly, tighten the flanges and air valves, turn on the mechanical pump, and after the mechanical pump has been running for a period of time, slowly open the exhaust valve, and close the exhaust valve when the vacuum in the tube is pumped to within 10 Pa , open the inlet valve and fill the quartz tube with argon (500 sccm) up to atmospheric pressure. Repeat the vacuuming-argon filling operation three times to complete the gas washing operation...

Embodiment 2

[0045] (1) To clean the copper foil, soak the polycrystalline copper foil (thickness 25 μm) with a diagonal size of 3 inches in a mixed solution of alcohol, acetic acid and deionized water with a volume ratio of 1:2:2 for 5 minutes, and then use pure Rinse with deionized water for 2-3 times, and finally blow dry with argon;

[0046] (2) Sample injection, place the dried copper foil on a flat silicon wafer, and slowly push it into the main temperature zone of the tube furnace;

[0047] (3) Wash the air, place the sample properly, tighten the flanges and air valves, turn on the mechanical pump, and after the mechanical pump has been running for a period of time, slowly open the exhaust valve, and close the exhaust valve when the vacuum in the tube is pumped to within 10 Pa , open the intake valve and fill the quartz tube with nitrogen (800 sccm) up to atmospheric pressure. Repeat the vacuuming-nitrogen filling operation three times to complete the scrubbing operation;

[0048]...

Embodiment 3

[0056] (1) To clean the copper foil, soak the polycrystalline copper foil with a diagonal size of 3 inches (thickness 25 μm) for 10 minutes in a mixed solution of alcohol, acetic acid, and deionized water with a volume ratio of 1:1:3, and then use pure Rinse with deionized water for 2-3 times, and finally blow dry with nitrogen;

[0057] (2) Sample injection, place the dried copper foil on a flat alumina sheet, and slowly push it into the main temperature zone of the tube furnace;

[0058] (3) Wash the air, place the sample properly, tighten the flanges and air valves, turn on the mechanical pump, and after the mechanical pump has been running for a period of time, slowly open the exhaust valve, and close the exhaust valve when the vacuum in the tube is pumped to within 10 Pa , open the inlet valve and fill the quartz tube with argon (900 sccm) up to atmospheric pressure. Repeat the vacuuming-argon filling operation three times to complete the gas washing operation;

[0059]...

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Abstract

The invention belongs to the technical field of single crystal copper foil preparation, and particularly relates to a method for simply and selectively preparing single crystal copper foil. The methodcomprises the following steps: cleaning cheap polycrystalline copper foil by using a mixed solution, putting the copper foil into an annealing furnace, keeping the temperature for a period of time ata temperature close to the melting point of the copper foil to melt the surface of the copper foil, conducting cooling to a certain temperature within a certain period of time, and carrying out annealing treatment. By controlling the cooling rate from the surface melting temperature to the annealing temperature, the (111) or (110) single crystal copper foil can be finally prepared selectively. According to the method, the preparation process of the single crystal copper foil is integrated to a certain extent, resource waste is reduced, and the method has a great industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of single crystal copper foil preparation, and in particular relates to a simple and selective method for preparing single crystal copper foil. Background technique [0002] At present, the preparation methods of single crystal metal are mainly divided into the pulling method and the Bridgman method. In order to obtain the metal foil of the single crystal, it is often necessary to subject the expensive bulk single crystal to additional processes such as cutting, grinding, and polishing, which increases the preparation cost. cost. In addition, it is also possible to obtain a single crystal foil by subjecting its polycrystalline metal foil to a certain treatment (such as annealing). As one of the most commonly used metals, single crystals of copper have stronger mechanical properties than polycrystalline ones, and due to the absence of grain boundaries, single crystal copper exhibits higher electrical conduct...

Claims

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Application Information

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IPC IPC(8): C30B29/02C30B1/06
CPCC30B1/06C30B29/02
Inventor 姚志强杨文龙
Owner ZHENGZHOU UNIV
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