发明授权
US5350618A Magnetic medium comprising a substrate having pits and grooves of
specific shapes and depths
失效
磁性介质包括具有特定形状和深度的凹坑和凹槽的基底
- 专利标题： Magnetic medium comprising a substrate having pits and grooves of specific shapes and depths
- 专利标题（中）： 磁性介质包括具有特定形状和深度的凹坑和凹槽的基底
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申请号： US842057申请日： 1992-02-26
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公开(公告)号： US5350618A公开(公告)日： 1994-09-27
- 发明人: Masayuki Togawa , Kiyoshi Toyama
- 申请人： Masayuki Togawa , Kiyoshi Toyama
- 申请人地址： JPX Osaka
- 专利权人： Teijin Seiki Co., Ltd.
- 当前专利权人： Teijin Seiki Co., Ltd.
- 当前专利权人地址： JPX Osaka
- 优先权： JPX3-034935 19910301; JPX3-099354 19910501; JPX3-099355 19910501
- 主分类号： G01D5/14
- IPC分类号： G01D5/14 ; H01F1/00 ; H01F10/08 ; H01F10/28 ; H01F41/16 ; H01F41/34 ; H02K15/03 ; B32B3/00
摘要：
A magnetic medium comprising a substrate formed with a stepped pit and a magnetic substance buried in the stepped pit. A method of manufacturing a magnetic medium comprising the steps of forming a first groove in a substrate by photoetching, forming a second groove in the first groove or in a portion adjacent to the first groove by the photoetching, the second groove being different in depth from the first groove, and burying magnetic substances into the first and second grooves.
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