Method and apparatus for improving signal-to-noise ratio in longitudinal recording media
US7479332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2005 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Jul 29, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/851
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for improving the signal-to-noise ratio in a longitudinal recording media is disclosed. The apparatus includes a first recording layer of the longitudinal recording media residing at the top of a recording media structure. The first recording layer includes an upper sublayer comprised of a CoPtCrB-based alloy material. The first recording layer also includes a lower sublayer comprised of a CoPtCrB-based alloy material and a middle sublayer comprised of a CoCrB-alloy. The middle sublayer is coupled to the upper sublayer and to the lower sublayer and is substantially thinner than the upper sublayer and the lower sublayer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.