发明授权
US5430706A Magneto-optical disk having lands and grooves for recording information
失效
具有用于记录信息的平台和凹槽的磁光盘
- 专利标题： Magneto-optical disk having lands and grooves for recording information
- 专利标题（中）： 具有用于记录信息的平台和凹槽的磁光盘
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申请号： US226961申请日： 1994-04-12
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公开(公告)号： US5430706A公开(公告)日： 1995-07-04
- 发明人: Hajime Utsunomiya , Masanori Shibahara
- 申请人： Hajime Utsunomiya , Masanori Shibahara
- 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： JPX5-113645 19930416
- 主分类号： G11B11/10
- IPC分类号： G11B11/10 ; B82B1/00 ; G11B7/007 ; G11B7/013 ; G11B7/09 ; G11B7/24 ; G11B11/105
摘要：
A magneto-optical disk is made up of a disk form of substrate including on its surface a recessed area having at least one of a groove and pits, and a recording layer provided such that it covers the recessed area. The geometry of at least one of the groove and pits is designed to conform to .theta..sub.10 .gtoreq..theta..sub.50 and .theta..sub.50 >.theta..sub.90 where .theta..sub.10, .theta..sub.50 and .theta..sub.90 are respectively the angles that tangential lines make with horizontal lines at 10%, 50% and 90% depth positions of a side wall of the recess in the diametrical direction of the substrate. This magneto-optical disk is improved in terms of the push-pull signal level, radial contrast, skew margin and C/N.
公开/授权文献
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