Magnetic recording medium
US5084342A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1989 |
| Grant date | Jan 28, 1992 |
| Priority date | — |
| Expiry date | Apr 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is disclosed. The magnetic recording medium is capable of high density recording; has excellent electromagnetic conversion properties including S/N ratio; whose magnetic powder has good dispersibility and good corrosion resistance; and that has good durability. The magnetic recording medium has a magnetic layer comprising a binder and magnetic metal powder dispersed in the binder. The powder has a specific surface area of not less than 45 m.sup.2 /g, and comprises not less than 90 atomic % of iron atoms, not less than 0.1 atomic % to less than 5 atomic % of aluminum atoms and not less than 0.1 atomic % to less than 10 atomic % of nickel atoms and the aluminum atoms present in the superficial portion of individual particles of the powder are bound with oxygen atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.