发明授权
US5199022A Disk having data memorizing portion including land-shaped and
groove-shaped areas, and writing/reading apparatus for the same
失效
具有数据存储部分的盘，包括形状和形状的区域，以及用于其的书写/读取装置
- 专利标题： Disk having data memorizing portion including land-shaped and groove-shaped areas, and writing/reading apparatus for the same
- 专利标题（中）： 具有数据存储部分的盘，包括形状和形状的区域，以及用于其的书写/读取装置
-
申请号： US858620申请日： 1992-03-27
-
公开(公告)号： US5199022A公开(公告)日： 1993-03-30
- 发明人: Katsumi Suzuki , Tsuneshi Yokota , Tomohisa Yoshimaru
- 申请人： Katsumi Suzuki , Tsuneshi Yokota , Tomohisa Yoshimaru
- 申请人地址： JPX Kawasaki
- 专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX3-183685 19910628
- 主分类号： G11B11/10
- IPC分类号： G11B11/10 ; G11B7/007 ; G11B11/105 ; G11B27/30
摘要：
A magneto-optical data reading member includes a transparent disk substrate, and land-shaped areas formed on the disk substrate in a spiral manner so as to be parallel with each other, and groove-shaped areas formed to be stepped with respect to the land-shaped areas, wherein each of the land-shaped and groove-shaped areas has, in a surface region thereof, a first magnetic film for reading data having a predetermined Curie temperature and a predetermined magnetic coercive force, and a second magnetic film for reading data, formed on the first magnetic film, having a Curie temperature higher than the predetermined Curie temperature and a magnetic coercive force higher than the predetermined magnetic coercive force, and having a plurality of memory pits in series according to the information data to be recorded.
公开/授权文献
信息查询
IPC分类:
