- 专利标题: Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
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申请号: US16361589申请日: 2019-03-22
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公开(公告)号: US11361792B2公开(公告)日: 2022-06-14
- 发明人: Norihito Kasada
- 申请人: FUJIFILM Corporation
- 申请人地址: JP Tokyo
- 专利权人: FUJIFILM Corporation
- 当前专利权人: FUJIFILM Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JPJP2018-057164 20180323,JPJP2019-050201 20190318
- 主分类号: G11B5/78
- IPC分类号: G11B5/78 ; G11B5/712 ; G11B5/708 ; G11B5/714 ; G11B5/84 ; G11B5/706 ; G11B5/735 ; G11B5/71
摘要:
The magnetic tape includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer includes one or more components selected from the group consisting of fatty acid and fatty acid amide, 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 a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is equal to or greater than 45 atom %, and an absolute value ΔN of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40.