Perpendicular media with dual soft magnetic layers
US8557408B2 · kind B2 · utility
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10References
16Claims
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Key dates
| Filing date | Apr 3, 2012 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Apr 3, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording medium having a substrate, a first soft magnetic underlayer, a second soft magnetic underlayer and a perpendicular magnetic recording layer without a spacer layer between the first and second soft magnetic underlayers is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.