Refined copper, method of producing refined copper, electric wire and method of manufacturing electric wire

Patent metadata

Field	Value
Publication number	US-2017327961-A1
Application number	US-201615194366-A
Country	US
Kind code	A1
Filing date	Jun 27, 2016
Priority date	May 10, 2016
Publication date	Nov 16, 2017
Grant date	—

Abstract

A method of producing a refined copper includes depositing the refined copper on a cathode by an electroplating process or an electroless plating process in an alkaline plating bath including a solution of a copper compound that includes none of sulfur, chlorine and oxygen elements and produces copper ions having a valence of +1 in the solution.

First claim

What is claimed is:

1 . A method of producing a refined copper, comprising depositing the refined copper on a cathode by an electroplating process or an electroless plating process in an alkaline plating bath comprising a solution of a copper compound that includes none of sulfur, chlorine and oxygen elements and produces copper ions having a valence of +1 in the solution.

2 . The method according to claim 1 , wherein the copper compound comprises a copper cyanide.

3 . The method according to claim 1 , wherein only the copper compound composes a copper compound in the plating bath.

4 . The method according to claim 1 , wherein a sulfur concentration in the refined copper from an outermost surface to a depth of 80 nm is not more than 620 mass ppm.

5 . The method according to claim 1 , wherein a chlorine concentration in the refined copper from an outermost surface to a depth of 60 nm is not more than 700 mass ppm.

6 . The method according to claim 1 , wherein a sulfur concentration in the refined copper from an outermost surface to a depth of 2.5 μm is not more than 300 mass ppm.

7 . The method according to claim 1 , wherein a chlorine concentration in the refined copper from an outermost surface to a depth of 2.5 μm is not more than 61 mass ppm.

8 . The method according to claim 1 , wherein a sulfur concentration in an entirety of the refined copper is not more than 3.1 mass ppm.

9 . The method according to claim 1 , wherein a chlorine concentration in an entirety of the refined copper is not more than 1.1 mass ppm.

10 . The method according to claim 1 , wherein a particle size on a surface of the refined copper is not less than 0.5 μm and not more than 5 μm.

11 . The method according to claim 1 , wherein a starting sheet comprising copper is used as the cathode and is included in the refined copper, and
wherein a sulfur concentration in an entirety of the refined copper including the starting sheet is not more than 3.1 mass ppm.

12 . The method according to claim 1 , wherein a starting sheet comprising copper is used as the cathode and is included in the refined copper, and
wherein a chlorine concentration in an entirety of the refined copper including the starting sheet is not more than 1.1 mass ppm.

13 . The method according to claim 1 , wherein a conductive metal plate comprising an alloy including at least one or more of stainless steel, transition metals or transition metal elements is used as the cathode, and
wherein the refined copper is obtained by stripping from the conductive metal plate.

14 . The method according to claim 1 , wherein a conductive plate comprising a composite material comprising a metal in the form of mesh or plate and a carbon nanotube is used as the cathode, and
wherein the refined copper is obtained by stripping from the conductive plate.

15 . A refined copper, wherein a sulfur concentration from an outermost surface to a depth of 80 nm is not more than 620 mass ppm.

16 . A refined copper, wherein a chlorine concentration from an outermost surface to a depth of 60 nm is not more than 700 mass ppm.

17 . A refined copper, wherein a sulfur concentration from an outermost surface to a depth of 2.5 μm is not more than 300 mass ppm.

18 . A refined copper, wherein a chlorine concentration from an outermost surface to a depth of 2.5 μm is not more than 61 mass ppm.

19 . A refined copper, wherein a sulfur concentration in an entirety of the refined copper is not more than 3.1 mass ppm.

20 . A refined copper, wherein a chlorine concentration in an entirety of the refined copper is not more than 1.1 mass ppm.

21 . A refined copper, wherein a sulfur concentration from an outermost surface to a depth of 80 nm is not more than 620 mass ppm,
wherein a chlorine concentration from the outermost surface to a depth of 60 nm is not more than 700 mass ppm, wherein a sulfur concentration from the outermost surface to a depth of 2.5 μm is not more than 300 mass ppm, wherein a chlorine concentration from the outermost surface to a depth of 2.5 μm is not more than 61 mass ppm, wherein a sulfur concentration in an entirety of the refined copper is not more than 3.1 mass ppm, and wherein a chlorine concentration in the entirety of the refined copper is not more than 1.1 mass ppm.

22 . A refined copper, wherein a particle size on a surface of the refined copper is not less than 0.5 μm and not more than 5 μm.

23 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper produced by the method according to claim 1 .

24 . The method according to claim 23 , wherein the wire conductor has a sulfur concentration of not more than 3.1 mass ppm, a conductivity of not less than 102.5% IACS and a half-softening temperature of not less than 125° C. and not more than 133° C.

25 . An electric wire, comprising a conductor that does not titanium as an additive element, and that has a sulfur concentration of not more than 3.1 mass ppm, a chlorine concentration of not more than 1.1 mass ppm, a conductivity of not less than 102.5% IACS and a half-softening temperature of not less than 125° C. and not more than 133° C.

26 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 15 .

27 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 16 .

28 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 17 .

29 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 18 .

30 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 19 .

31 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 20 .

32 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 21 .

33 . A method of manufacturing an electric wire, comprising making a wire conductor using the refined copper according to claim 22 .

Assignees

• Hitachi Metals Ltd

Inventors

• Suenaga Kazufumi
• Ando Setsuo
• Endo Yuju

Classifications

• C22B15/00

  Obtaining copper · CPC title

• H01B1/026

  Alloys based on copper · CPC title

• C22C9/00

  Alloys based on copper · CPC title

• C25C7/02

  Electrodes (consumable anodes for the refining the metals C25C1/00 - C25C5/00); Connections thereof · CPC title

• C25C1/12 Primary

  of copper · CPC title