发明授权
- 专利标题： Perpendicular magnetic recording media and magnetic recording and reproducing apparatus using the same
- 专利标题（中）： 垂直磁记录介质和使用其的磁记录和再现设备
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申请号： US922763申请日： 1997-09-03
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公开(公告)号： US6083599A公开(公告)日： 2000-07-04
- 发明人: Yoshiyuki Hirayama , Masaaki Futamoto , Yukio Honda , Kazusuke Yamanaka , Kenya Ito
- 申请人： Yoshiyuki Hirayama , Masaaki Futamoto , Yukio Honda , Kazusuke Yamanaka , Kenya Ito
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-233911 19960904
- 主分类号： G11B5/64
- IPC分类号： G11B5/64 ; G11B5/66
摘要：
A perpendicular magnetic recording medium is provided by using a ferromagnetic polycrystalline thin film having main components of cobalt and chromium in which the coercivity is 1500 oersted or more and the fluctuation field of magnetic viscosity is 30 oersted or more; the film thickness is controlled within a range from 30 nm to 100 nm. A perpendicular magnetic recording medium with low noise and high output which is suited for high density recording can be obtained and a large capacity magnetic recording and reproducing apparatus can be provided by using this medium.
公开/授权文献
- US4164077A Level indicating devices 公开/授权日：1979-08-14