发明授权
- 专利标题： Magnetic recording medium, magnetic recording medium manufacture method, and information regeneration apparatus
- 专利标题（中）： 磁记录介质，磁记录介质制造方法和信息再生装置
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申请号： US09782209申请日： 2001-02-13
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公开(公告)号： US06620481B2公开(公告)日： 2003-09-16
- 发明人: Takashi Toyoguchi
- 申请人： Takashi Toyoguchi
- 优先权： JP2000-205088 20000706
- 主分类号： G11B582
- IPC分类号： G11B582
摘要：
There is disclosed a magnetic recording medium in which reduced magnetic spacing and secured contact sliding durability are compatible with each other, and the magnetic recording medium includes: a disk-like substrate 1; an underlayer 2 formed on the substrate; a magnetic layer 3 formed on the underlayer, including a ferromagnetic material, and formed by introducing a predetermined element to modify a surface layer portion; and a protective layer 4—1, formed in at least one area of an outer peripheral area and an inner peripheral area excluding a middle area held between the outer peripheral area and the inner peripheral area of a disk on the modified surface layer portion of the magnetic layer, for protecting the magnetic layer.