Invention Grant
- Patent Title: Magnetic recording medium and servo signal recording device
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Application No.: US17599843Application Date: 2020-03-27
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Publication No.: US11862212B2Publication Date: 2024-01-02
- Inventor: Junichi Tachibana , Noboru Sekiguchi
- Applicant: Sony Group Corporation
- Applicant Address: JP Tokyo
- Assignee: Sony Group Corporation
- Current Assignee: Sony Group Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP 19069206 2019.03.29
- International Application: PCT/JP2020/014055 2020.03.27
- International Announcement: WO2020/203785A 2020.10.08
- Date entered country: 2021-09-29
- Main IPC: G11B5/592
- IPC: G11B5/592 ; G11B5/706 ; G11B5/78

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.
Public/Granted literature
- US20220189506A1 MAGNETIC RECORDING MEDIUM AND SERVO SIGNAL RECORDING DEVICE Public/Granted day:2022-06-16
Information query
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