Magnetic recording medium with a non-magnetic granular layer under a plurality of granular magnetic layers and storage apparatus
US8722212B2 · kind B2 · utility
1Cited by
4References
10Claims
0Family size
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Key dates
| Filing date | Mar 2, 2010 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Aug 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium includes a non-magnetic granular layer, and a recording layer provided on the non-magnetic granular layer, wherein the recording layer includes a first granular magnetic layer provided on the non-magnetic granular layer, and a second granular magnetic layer provided on the first granular magnetic layer, and a non-magnetic material magnetically separating metal grains of the non-magnetic granular layer is different from a non-magnetic material magnetically separating magnetic grains of the first granular magnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.