-
公开(公告)号：US20230238032A1
公开(公告)日：2023-07-27
申请号：US18191354
申请日：2023-03-28
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO
IPC: G11B23/107 , G11B5/78 , G11B5/588
CPC classification number: G11B23/107 , G11B5/78 , G11B5/588
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.
-
公开(公告)号：US20200312366A1
公开(公告)日：2020-10-01
申请号：US16812374
申请日：2020-03-09
Applicant: FUJIFILM CORPORATION
Inventor： Yusuke KAGAWA , Tetsuya KANEKO
IPC: G11B15/087 , G11B33/04 , G11B5/008
Abstract: A recording and reproducing device includes: a first acquisition unit which acquires servo band interval information representing an interval, in a width direction of a magnetic tape, between adjacent servo recording elements of plural servo recording elements which record the servo patterns on the plural servo bands, respectively; a second acquisition unit which acquires reproducing element interval information representing an interval in the width direction between respective servo reproducing elements which read the adjacent servo patterns along the width direction with respect to the plural tape drives; and a selection unit which selects a tape drive into which the magnetic tape is inserted, from the plural tape drives, using a value representing a difference between the interval represented by the servo band interval information and the interval represented by the reproducing element interval information.
-
公开(公告)号：US20180182429A1
公开(公告)日：2018-06-28
申请号：US15854383
申请日：2017-12-26
Applicant: FUJIFILM Corporation
Inventor： Norihito KASADA , Eiki OZAWA , Tetsuya KANEKO
CPC classification number: G11B15/46 , G11B5/3909 , G11B5/70 , G11B5/706 , G11B5/73 , G11B5/78 , G11B5/842
Abstract: The magnetic tape device includes: a magnetic tape; and a reproducing head, in which a magnetic tape transportation speed of the magnetic tape device is equal to or lower than 18 m/sec, the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the magnetic layer includes one or more components selected from the group consisting of fatty acid and fatty acid amide, and a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 to 65 atom %.
-
公开(公告)号：US20180182420A1
公开(公告)日：2018-06-28
申请号：US15854520
申请日：2017-12-26
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO , Norihito KASADA , Eiki OZAWA
CPC classification number: G11B5/588 , G11B5/39 , G11B5/3903 , G11B5/3906 , G11B5/3909 , G11B5/78
Abstract: Provided are an evaluation method of a magnetic tape, in which the magnetic tape which is an evaluation target includes a magnetic layer including a servo pattern, the method including: reading the servo pattern by a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element; measuring electric resistance of the tunnel magnetoresistance effect type element after the reading; and determining quality of the magnetic tape by using a degree of a decrease in the measured electric resistance from a reference value as an index, and a manufacturing method of a magnetic tape including: evaluating the magnetic tape including a servo pattern in a magnetic layer by the evaluation method.
-
公开(公告)号：US20170372743A1
公开(公告)日：2017-12-28
申请号：US15626720
申请日：2017-06-19
Applicant: FUJIFILM Corporation
Inventor： Norihito KASADA , Tetsuya KANEKO , Eiki OZAWA
Abstract: The magnetic tape includes a non-magnetic layer including non-magnetic powder and a binder on a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binder on the non-magnetic layer, the total thickness of the non-magnetic layer and the magnetic layer is equal to or smaller than 0.60 μm, the magnetic layer includes a timing-based servo pattern, one or more components selected from the group consisting of fatty acid and fatty acid amide are at least included in the magnetic layer, and a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is equal to or greater than 45 atom %.
-
Patent Agency Ranking
公开(公告)号：US20170186460A1
公开(公告)日：2017-06-29
申请号：US15388864
申请日：2016-12-22
Applicant: FUJIFILM Corporation
Inventor： Norihito KASADA , Tetsuya KANEKO
CPC classification number: G11B5/78 , G11B5/584 , G11B5/5928 , G11B5/70
Abstract: The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on a nonmagnetic support, wherein the coercive force measured in the longitudinal direction of the magnetic tape is less than or equal to 167 kA/m, a timing-based servo pattern is present on the magnetic layer, and the edge shape specified by observing the timing-based servo pattern with a magnetic force microscope is a shape in which the difference between the value of the 99.9% cumulative distribution function of the width of misalignment from the ideal shape in the longitudinal direction of the magnetic tape and the value L0.1 of the 0.1% cumulative distribution function, L99.9-L0.1, is less than or equal to 180 nm.
-
7.发明公开公开(公告)号：US20240363142A1
公开(公告)日：2024-10-31
申请号：US18768256
申请日：2024-07-10
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
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.
-
公开(公告)号：US20240233778A9
公开(公告)日：2024-07-11
申请号：US18405166
申请日：2024-01-05
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
IPC: G11B27/36
CPC classification number: G11B27/36
Abstract: A detection device includes a processing device and a storage medium. An ideal waveform signal indicating an ideal waveform of a servo pattern signal which is a result of reading a servo pattern recorded in a servo band of a magnetic tape by a servo reading element is stored in advance in the storage medium. The processing device acquires a servo band signal which is a result of reading the servo band by the servo reading element, and detects the servo pattern signal by comparing the servo band signal with the ideal waveform signal.
-
9.发明公开公开(公告)号：US20230317106A1
公开(公告)日：2023-10-05
申请号：US18171919
申请日：2023-02-21
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
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.
-
公开(公告)号：US20230098320A1
公开(公告)日：2023-03-30
申请号：US17950142
申请日：2022-09-22
Applicant: FUJIFILM CORPORATION
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
Abstract: A first straight line region and a second straight line region of the straight line region pair are inclined in opposite directions with respect to a first imaginary straight line. The first straight line region has a steeper inclined angle with respect to the first imaginary straight line than the second straight line region. Positions of both ends of the first straight line region and positions of both ends of the second straight line region are aligned in a direction corresponding to a width direction of a magnetic tape. A plurality of gap patterns deviate from each other by a predetermined interval in a direction corresponding to a longitudinal direction of the magnetic tape, between the gap patterns adjacent to each other along the direction corresponding to the width direction of the magnetic tape. A substrate is inclined with respect to the first imaginary straight line.
-
-
-
-
-
-
-
-
-
Search Results
46
records
(took 0.022 seconds)
