- 专利标题: Magnetic recording medium and magnetic recording and reproducing apparatus
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申请号: US16874170申请日: 2020-05-14
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公开(公告)号: US11355148B2公开(公告)日: 2022-06-07
- 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: JPJP2019-092256 20190515
- 主分类号: G11B5/733
- IPC分类号: G11B5/733 ; G11B5/008 ; G01B9/02 ; G01B11/14 ; B08B3/08
摘要:
The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a difference Safter−Sbefore between a spacing Safter measured on a surface of the magnetic layer by optical interferometry after ethanol cleaning and a spacing Sbefore measured on the surface of the magnetic layer by optical interferometry before ethanol cleaning is more than 0 nm and 6.0 nm or less, and the non-magnetic support is an aromatic polyester support having a moisture absorption of 0.3% or less.