Method for producing high purity electrolytic copper
US4874436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Aug 26, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method is provided for producing high purity electrolytic copper useful, for example, to make a copper wire for use in sound or image reproducing systems, such as audio, video and television systems, etc. The copper wire consists of high purity copper in which silver and sulfur contents are both not more than 0.5 ppm and preferably has a crystal grain size not less than 0.02 mm and is unidirectionally solidified or is a single crystal. Such a copper wire is manufactured by continuously casting electrodeposited copper which has been obtained by refining by re-electrolysis of electrolytic copper, using a specially arranged casting apparatus having a mold projecting to an electrolytic bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.