发明授权
US5453886A Digital recording method using a specified magnetic recording medium
失效
使用指定的磁记录介质的数字记录方法
- 专利标题： Digital recording method using a specified magnetic recording medium
- 专利标题（中）： 使用指定的磁记录介质的数字记录方法
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申请号： US181160申请日： 1994-01-13
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公开(公告)号： US5453886A公开(公告)日： 1995-09-26
- 发明人: Koji Kobayashi , Mitsuru Takai
- 申请人： Koji Kobayashi , Mitsuru Takai
- 申请人地址： JPX Tokyo
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-241833 19900911; JPX3-175989 19910620; JPX3-175990 19910620; JPX3-175991 19910620
- 主分类号： C23C14/22
- IPC分类号： C23C14/22 ; G11B5/66 ; G11B5/85 ; G11B5/00
摘要：
A magnetic recording medium for digital recording has a magnetic layer on a non-magnetic substrate. The magnetic layer includes a lower layer of ferromagnetic metal thin film nearer to the substrate surface and an upper layer of ferromagnetic metal thin film, each ferromagnetic metal thin film being composed of columnar grains deposited by oblique evaporation process. The average growth directions of columnar grains in the lower and upper layers intersect each other from opposite sides of a normal to the substrate surface. Digital recording is carried out by means of a magnetic head in relative motion toward or opposite to the growth direction of columnar grains in the upper layer.
公开/授权文献
- US4368812A Clutch plate 公开/授权日：1983-01-18