发明申请
- 专利标题： Magnetic transfer master disk, its manufacturing method and magnetic transfer method
- 专利标题（中）： 磁传输主盘，其制造方法和磁转移方式
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申请号： US11347326申请日： 2006-02-06
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公开(公告)号： US20060177699A1公开(公告)日： 2006-08-10
- 发明人: Kenji Ichikawa , Shiho Kamisawa , Seiji Kasahara
- 申请人： Kenji Ichikawa , Shiho Kamisawa , Seiji Kasahara
- 专利权人： FUJI PHOTO FILM CO., LTD.
- 当前专利权人： FUJI PHOTO FILM CO., LTD.
- 优先权： JP2005-031958 20050208; JP2005-039703 20050216
- 主分类号： G11B5/64
- IPC分类号： G11B5/64 ; G11B5/86
摘要：
The present invention provides a magnetic transfer master disk comprising: a master substrate formed by a metal plate, on a surface of which a protruding and recessed pattern corresponding to transfer information is transferred by electroforming, the metal plate being composed of two or more electroforming layers that are different from each other in crystal orientation; and a magnetic layer formed on the protruding and recessed pattern of the master substrate in order to eliminate warpage and distortion of the master disk even if the close contact pressure is increased during transferring magnetic information such as format information to a magnetic disk used in a hard disk device and the like.