公开(公告)号：US06391419B1

公开(公告)日：2002-05-21

申请号：US09661058

申请日：2000-09-13

申请人： Kazutoshi Katayama ,  Kazuyuki Usuki

发明人： Kazutoshi Katayama ,  Kazuyuki Usuki

IPC分类号： G11B582

CPC分类号： G11B5/7325 ,  G11B5/8408 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/31 ,  Y10T428/31721 ,  Y10T428/31725

摘要： A magnetic recording medium, comprising a magnetic layer containing a ferromagnetic metal thin film having micro-size projections on surface thereof and formed by vacuum film forming method and provided at least on one side of a nonmagnetic substrate, a carbon protective layer and a lubricant provided on said magnetic layer, a central axis of a diamond indenter of trilateral pyramid having a tip sharp angle of 90° and a radius of curvature at tip of 35-50 nm being directed perpendicularly to the surface of the nonmagnetic substrate, pressure is applied on the carbon protective layer, and a load obtained when indentation depth of the indenter is 10-25 nm is divided by projection area of indenter contactor, and the quotient, i.e. micro-hardness, is within the range of 10-30 GPa.

摘要翻译： 一种磁记录介质，包括磁性层，该磁性层含有在其表面上具有微尺寸突起并由真空成膜法形成的强磁性金属薄膜，并且至少设置在非磁性基底的一侧，提供了碳保护层和润滑剂 在所述磁性层上，三角锥体的金刚石压头的中心轴线具有90°的顶尖锐角和35-50nm尖端处的曲率半径垂直于非磁性基片的表面，压力施加在 碳保护层和当压头的压痕深度为10-25nm时获得的负载除以压头接触器的投影面积，并且商（即显微硬度）在10-30GPa的范围内。