发明申请
- 专利标题: MAGNETIC RECORDING MEDIUM
- 专利标题(中): 磁记录介质
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申请号: US13211051申请日: 2011-08-16
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公开(公告)号: US20120045664A1公开(公告)日: 2012-02-23
- 发明人: Kenji TANAKA , Masao Fujita , Sadamu Kuse
- 申请人: Kenji TANAKA , Masao Fujita , Sadamu Kuse
- 优先权: JP2010-182373 20100817
- 主分类号: G11B5/70
- IPC分类号: G11B5/70 ; G11B5/714 ; G11B5/71
摘要:
A magnetic recording medium of the present invention is a magnetic recording medium including a non-magnetic substrate; a non-magnetic layer that is formed on one of principal surfaces of the non-magnetic substrate and contains a non-magnetic powder, a binder, and a lubricant; and a magnetic layer that is formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate and contains a magnetic powder and a binder. The magnetic powder has an average particle size between 10 inn and 35 nm inclusive. The lubricant is migratable to the magnetic layer and forms a lubricant layer on a surface of the magnetic layer when a pressure is applied to the magnetic layer. When spacing of the surface of the magnetic layer before and after washing the lubricant with n-hexane is measured with a TSA (Tape Spacing Analyzer), the value of the spacing after washing is 3 to 10 nm, and the value of the spacing before washing is 1 to 5 nm smaller than the value of the spacing after washing.
公开/授权文献
- US09311946B2 Magnetic recording medium 公开/授权日:2016-04-12
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