Smooth structures for heat-assisted magnetic recording media
US9449633B1 · kind B1 · utility
3Cited by
259References
22Claims
0Family size
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Key dates
| Filing date | Nov 6, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Nov 6, 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 and head-disk interface characteristics includes an etched smoothened underlayer, over which the recording layer is grown. One mechanism for increasing the SNR is by growing more columnar magnetic grain structures within the recording layer, which is facilitated by a smoother underlayer template.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.