Magnetic recording medium
US5698286A · kind A · utility
15Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Sep 25, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic layer is provided on a nonmagnetic base with a non-ferromagnetic layer interposed between them. Non-ferromagnetic particulate iron oxide is incorporated in the non-ferromagnetic layer. In addition to, or in place of, this iron oxide, non-structural carbon having a mean particle diameter of 10 to 60 nm, a specific surface area of 150 m2/g as measured by the BET method and a DBP oil absorption of 100 ml/100 g or less may be used. This makes it possible to achieve a magnetic recording medium having excellent surface properties and good-enough electromagnetic transducing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.