Magnetic recording medium, servo signal recording apparatus and method of producing magnetic recording medium
US9001455B2 · kind B2 · utility
2Cited by
1References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a magnetic recording medium including a magnetic layer. The magnetic layer has a servo signal recorded thereon by magnetizing a part of the magnetic layer in a first direction. The first direction contains a component of a perpendicular direction that is perpendicular to a top surface of the magnetic layer. The magnetic layer is pre-magnetized in a second direction before recording of the servo signal. The second direction contains the component of the perpendicular direction. The second direction is opposite to the first direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.