High damping cap layer for magnetic recording media
US9159350B1 · kind B1 · utility
3Cited by
254References
21Claims
0Family size
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Key dates
| Filing date | Jul 2, 2014 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Jul 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording medium having improved signal-to-noise ratio (SNR) capabilities includes a cap layer over the recording layer, where the cap layer has a magnetic damping constant greater than 0.03, such as by using a FeHo cap layer. One mechanism for increasing the SNR is by reducing the switching field distribution. Such a medium is particularly useful in the context of heat-assisted magnetic recording (HAMR).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.