Magnetic recording medium and servo signal recording device
US11862212B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2020 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Nov 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
[Solving Means] A magnetic recording medium according to an embodiment of the present technology is a tape-shaped magnetic recording medium, including: a magnetic layer including a servo band, a servo signal being recorded on the servo band. An index expressed by Sq×Fact.(p−p)/F0(p−p) is 0.42 or more, Sq being a squareness ratio of the magnetic layer in a perpendicular direction, F0(p−p) being a peak-to-peak value of a first magnetic force gradient strength observed by a magnetic force microscope when a servo signal is saturation-recorded on the magnetic layer, Fact.(p−p) being a peak-to-peak value of a second magnetic force gradient strength for the servo signal recorded on the servo band observed by the magnetic force microscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.