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公开(公告)号：US11183209B2
公开(公告)日：2021-11-23
申请号：US16970247
申请日：2019-02-18
申请人： Sony Corporation
发明人： Minoru Yamaga , Tooru Sato , Toshiaki Miura , Takanobu Iwama , Jun Takahashi
摘要： A magnetic recording medium in a shape of a tape that is long in a longitudinal direction and is short in a width direction is provided, the medium including: a base material; and a magnetic layer, in which the magnetic layer includes a data band long in the longitudinal direction in which a data signal is to be written, and a servo band long in the longitudinal direction in which a servo signal is written, and in the magnetic layer, a degree of vertical orientation is greater than or equal to 65%, a half width of a solitary waveform in a reproduction waveform of the servo signal is less than or equal to 195 nm, a thickness of the magnetic layer is less than or equal to 90 nm, and a thickness of the base material is less than or equal to 4.2 μm.
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公开(公告)号：US11250880B2
公开(公告)日：2022-02-15
申请号：US16627600
申请日：2018-04-13
申请人： Sony Corporation
发明人： Toshiaki Miura , Satoru Abe , Yuuko Kamoshita , Riku Yoshida
摘要： A magnetic recording medium includes: a substrate that is long in shape; and a magnetic layer containing magnetic powder and a binder. The glass transition point of the binder is not lower than 75° C. In a case where atomic force microscope observation images in a 10 μm×10 μm rectangular shape are acquired at five locations randomly selected from the surface on the side of the magnetic layer, any linear protrusion that is 3 nm to 20 nm in height, is 0.3 μm to 1.0 μm in width, and extends across two sides of the observation image does not exist in the observation images of four locations among the acquired observation images of the five locations.
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