发明授权
- 专利标题: Magnetic recording medium
- 专利标题(中): 磁记录介质
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申请号: US179670申请日: 1998-10-27
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公开(公告)号: US06139937A公开(公告)日: 2000-10-31
- 发明人: Makoto Sato , Hideyuki Kobayashi , Kazutaka Yamashita
- 申请人: Makoto Sato , Hideyuki Kobayashi , Kazutaka Yamashita
- 申请人地址: JPX Tokyo
- 专利权人: Kao Corporation
- 当前专利权人: Kao Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX9-361405 19971226
- 主分类号: C09D175/06
- IPC分类号: C09D175/06 ; G01Q60/00 ; G11B5/70 ; G11B5/702 ; G11B5/706 ; G11B5/71 ; G11B5/714 ; G11B5/738 ; G11B5/84
摘要:
A magnetic recording medium in which the bearing ratio Tp of the magnetic layer on a slice level at a depth of 45 nm from the highest peak of the surface profile measured with an atomic force microscope is 3% to 60%, and the difference .DELTA..mu. between the maximum frictional coefficient and the minimum frictional coefficient of the magnetic layer ranges from 0.1 to 0.0001 as measured under conditions of 5 mm.sup.2 in contact area, 2 g in weight of a measuring head, 0.04 to 0.2 N in load applied, 3 mm/sec in speed, and 140 mm in length of measurement.
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