Magnetic tape, magnetic tape cartridge, and magnetic tape device

    公开(公告)号:US12080322B2

    公开(公告)日:2024-09-03

    申请号:US18191354

    申请日:2023-03-28

    Inventor: Tetsuya Kaneko

    CPC classification number: G11B23/107 G11B5/588 G11B5/78

    Abstract: A magnetic tape including a timing-based servo pattern, in which the magnetic tape is used in a magnetic tape device in which a total number of data tracks is 8705 or more in conversion of a magnetic tape having a width of ½ inches, and ΔPNL of the timing-based servo pattern is 10.0% or less of a track pitch. A magnetic tape cartridge including the magnetic tape, and a magnetic tape device including a magnetic tape, in which a total number of data tracks is 8705 or more in conversion of a magnetic tape having a width of ½ inches, the magnetic tape includes a timing-based servo pattern, and ΔPNL of the timing-based servo pattern is 10.0% or less of a track pitch are provided. The ΔPNL indicates an amount of deviation of the timing-based servo pattern from linearity.

    Magnetic head, magnetic tape, magnetic tape cartridge, magnetic tape drive, and magnetic tape reading method

    公开(公告)号:US12068011B2

    公开(公告)日:2024-08-20

    申请号:US18171919

    申请日:2023-02-21

    CPC classification number: G11B5/5508 G11B5/5928

    Abstract: A magnetic head includes a first servo reading element pair, a second servo reading element pair, and a plurality of magnetic elements. The first servo reading element pair consists of a first servo reading element and a second servo reading element, the second servo reading element pair consists of a third servo reading element and a fourth servo reading element, the first servo reading element and the third servo reading element are disposed on one end side of the plurality of magnetic elements and read one servo band of the pair of servo bands, and the second servo reading element and the fourth servo reading element are disposed on the other end side of the plurality of magnetic elements and read the other servo band of the pair of servo bands.

    Magnetic tape including characterized magnetic layer and magnetic tape device

    公开(公告)号:US10510370B2

    公开(公告)日:2019-12-17

    申请号:US15626832

    申请日:2017-06-19

    Abstract: A magnetic tape is provided in which the total thickness of a non-magnetic layer and a magnetic layer is equal to or smaller than 0.60 μm. The magnetic layer includes a timing-based servo pattern and also includes fatty acid ester. The full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer before performing vacuum heating with respect to the magnetic tape is greater than 0 nm and less than or equal to 7.0 nm, while the same value measured after performing the vacuum heating is also greater than 0 nm and less than or equal to 7.0 nm. Further, the difference between a spacing measured after performing the vacuum heating and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm.

    Magnetic tape device and head tracking servo method

    公开(公告)号:US10008230B1

    公开(公告)日:2018-06-26

    申请号:US15854506

    申请日:2017-12-26

    Abstract: The magnetic tape device includes: a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, the magnetic layer includes a servo pattern, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 9.0 nm.

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