Longitudal magnetic recording medium having a multi-layered underlayer and magnetic storage apparatus using such magnetic recording medium
US5922456A · kind A · utility
28Cited by
3References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A longitudinal magnetic recording medium and a magnetic storage apparatus using the longitudinal magnetic recording medium. The recording medium has a multi-layered underlayer and a magnetic layer formed on it. The underlayer has a first layer of a body-centered cubic structure, a second layer of a hexagonal-close packed structure formed on the first layer, and a third layer of a bcc structure formed on the second layer. The underlayer may further have a fourth layer of an hcp structure layer formed on the third layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.