Magnetic recording member
US4758474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Nov 20, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Herein is disclosed a magnetic recording member having a high mechanical durability and an improved resistance to wear. The magnetic recording member comprises a substrate, a magnetic layer formed on the surface of the substrate and a first non-magnetic layer of a metal having a low melting point, preferably lower than 400.degree. C. and formed on the magnetic layer, at least the surface of the first non-magnetic layer being oxidized. The magnetic recording member may further contain a lubricant layer. The surface of the magnetic recording member of the invention presents a roughness lower than 25 nm and includes fine protrusions having a linear density higher than 1.times.10.sup.3 /mm. The process for the preparation of the magnetic recording member is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.