Multilayered vertical magnetic recording medium
US4749628A · kind A · utility
32Cited by
16References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1986 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Apr 29, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12861
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A vertical magnetic recording medium is formed of multiple layers, each layer comprising a cobalt-platinum (CoPt) magnetic film formed on a hexagonal-close-packed (HCP) necleating film. The thickness of each CoPt film in each layer is sufficiently thin to assure that the film has perpendicular magnetic anisotropy. The magnetic properties of the multilayered magnetic film structure can be varied by varying the thickness of the individual films and the number of layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.