- 专利标题: Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
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申请号: US10027871申请日: 2001-12-21
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公开(公告)号: US06590727B2公开(公告)日: 2003-07-08
- 发明人: Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
- 申请人: Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
- 优先权: JP8-191889 19960722; JP9-075703 19970327; JP9-133897 19970523; JP9-124257 19970514
- 主分类号: G11B586
- IPC分类号: G11B586
摘要:
A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.