Process for the electrodeposition of an amorphous cobalt-iron-phosphorus alloy
US5435903A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1992 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Nov 12, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/0323
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin amorphous alloy of cobalt, iron and phosphorus having good workability and the ability to be used as a soft magnetic material is formed by electrolytic deposition. The electrolytic bath has a pH of 1.0 to 2.2 and contains at least a divalent cobalt ion, a divalent iron ion, and phosphorous acid and/or a phosphite. The amorphous alloy contains at least 69 atomic percent cobalt, 2 to 30 atomic percent phosphorus and the iron/(cobalt+iron) atomic ratio is from 0.001 to 0.1. The alloy may be deposited on a working electrode having a chrome-plated surface with a center line average roughness of less than 1 .mu.m and may be peeled from the electrode to obtain a tape-shaped or foil-shaped product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.