Soft magnetic underlayer with exchange coupling induced anisotropy for perpendicular magnetic recording media
US7241516B1 · kind B1 · utility
8Cited by
5References
17Claims
0Family size
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Key dates
| Filing date | Mar 3, 2004 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Feb 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/667
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved soft underlayer structure for perpendicular magnetic recording. The structure includes at least two soft underlayers separated by a non-magnetic spacer layer. The soft underlayer structure incorporates exchange coupling induced anisotropy for improved perpendicular magnetic recording properties, including an improved signal-to-noise ratio (SNR) and reduced adjacent track erasure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.