发明授权
- 专利标题: Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus
- 专利标题(中): 磁记录介质,其制造方法以及磁记录和重放装置
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申请号: US10152675申请日: 2002-05-23
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公开(公告)号: US06677061B2公开(公告)日: 2004-01-13
- 发明人: Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai
- 申请人: Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai
- 优先权: JPP2001-154448 20010523
- 主分类号: G11B566
- IPC分类号: G11B566
摘要:
A magnetic recording medium exhibiting excellent recording and reproduction characteristics is disclosed. A magnetic recording medium includes a non-magnetic substrate 1; a soft magnetic undercoat film 2; an orientation-regulating film 3; a perpendicular magnetic film 4; and a protective film 5, the films being formed on the substrate 1. The soft magnetic undercoat film 2 contains a material represented by the following composition: aFe-bCo-cM-dX1-fN where M is one or more elements selected from Ti, Zr, Nb, Hf, Ta, V, and Mo; X1 is one or more elements selected from Cr, Ga, Al, Si, and Ni; and a, b, c, d, and f represent atomic percentages and satisfy the following relations: 60≦a+b≦90, 30≦a≦90, 5≦c≦20, 0.1≦d≦7, and 3≦f≦30.
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