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1.发明公开公开(公告)号：US20240105227A1
公开(公告)日：2024-03-28
申请号：US18524221
申请日：2023-11-30
申请人： FUJIFILM Corporation
发明人： Norihito KASADA , Yuto MURATA , Nagisa YAMASAKI
CPC分类号： G11B5/70 , G11B5/00813 , G11B5/00826 , G11B5/4893 , G11B5/00856 , G11B5/7356
摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation σ of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.
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公开(公告)号：US20230419993A1
公开(公告)日：2023-12-28
申请号：US18298084
申请日：2023-04-10
申请人： FUJIFILM Corporation
发明人： Nagisa YAMASAKI , Norihito KASADA , Yuto MURATA
CPC分类号： G11B5/5928 , G11B5/78
摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. The number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.15 μm or more and 0.25 μm or less is 100 or more and 2500 or less per an area of 40 μm×40 μm. Standard deviation σ of the number of the recesses in a width direction of the surface of the magnetic layer is 100 or less.
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公开(公告)号：US20230335159A1
公开(公告)日：2023-10-19
申请号：US18298730
申请日：2023-04-11
申请人： FUJIFILM Corporation
发明人： Norihito KASADA , Yuto MURATA , Nagisa YAMASAKI
CPC分类号： G11B5/7356 , G11B5/00856
摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation σ of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.
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公开(公告)号：US20230335160A1
公开(公告)日：2023-10-19
申请号：US18299289
申请日：2023-04-12
申请人： FUJIFILM Corporation
发明人： Yuto MURATA , Norihito KASADA , Nagisa YAMASAKI
CPC分类号： G11B5/7356 , G11B5/78 , G11B20/20
摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a non-linear component of tape width deformation generated by storage for 10 days in an environment of a temperature of 60° C. and a relative humidity of 20% is 100 nm or less. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape.
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公开(公告)号：US20230206946A1
公开(公告)日：2023-06-29
申请号：US18145257
申请日：2022-12-22
申请人： FUJIFILM Corporation
发明人： Nagisa YAMASAKI , Toru Nakao , Atsushi Musha , Kento Takishima
IPC分类号： G11B5/53
摘要： A magnetic tape cartridge includes a magnetic tape, and a storage medium in which information on the magnetic tape is stored. The magnetic tape has a recording surface. Data is recorded in the recording surface by a magnetic head in a state in which the magnetic tape is made to travel. The magnetic head is disposed at an inclined posture with respect to a width direction of the magnetic tape along the recording surface. Angle adjustment information obtained at a data recording timing which is a timing at which the data is recorded in the recording surface is stored in the storage medium. The angle adjustment information is information for adjusting an angle at which the magnetic head is inclined with respect to the width direction along the recording surface.
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公开(公告)号：US20230206945A1
公开(公告)日：2023-06-29
申请号：US18145119
申请日：2022-12-22
申请人： FUJIFILM Corporation
发明人： Nagisa YAMASAKI , Toru Nakao , Atsushi Musha , Kento Takishima
IPC分类号： G11B5/53
摘要： A magnetic tape cartridge includes a magnetic tape, and a storage medium in which information on the magnetic tape is stored. The magnetic tape has a recording surface. Data is recorded in the recording surface by a magnetic head in a state in which the magnetic tape is made to travel. The magnetic head is disposed at an inclined posture with respect to a width direction of the magnetic tape along the recording surface. Angle adjustment information obtained before the data is recorded in the recording surface is stored in the storage medium. The angle adjustment information is information for adjusting an angle at which the magnetic head is inclined with respect to the width direction along the recording surface.
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