发明授权
- 专利标题： Process for manufacturing a magneto-optic disc
- 专利标题（中）： 制造磁光盘的方法
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申请号： US523756申请日： 1990-05-15
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公开(公告)号： US5082690A公开(公告)日： 1992-01-21
- 发明人: Tomoyuki Miyake , Hiroyuki Katayama , Junichiro Nakayama , Yoshiteru Murakami , Kenji Ohta
- 申请人： Tomoyuki Miyake , Hiroyuki Katayama , Junichiro Nakayama , Yoshiteru Murakami , Kenji Ohta
- 申请人地址： JPX Osaka
- 专利权人： Sharp Corporation
- 当前专利权人： Sharp Corporation
- 当前专利权人地址： JPX Osaka
- 优先权： JPX1-121816 19890515
- 主分类号： G11B11/10
- IPC分类号： G11B11/10 ; F26B13/10 ; G11B11/105
摘要：
The present invention provides a process for manufacturing a magneto-optic disc comprising at least a transparent substrate, a magneto-optic recording film, and a protecting film made of resin for protecting the magneto-optic recording film, comprising the steps of forming the magneto-optic recording film over the entire one side surface of the transparent substrate; providing in a portion adjacent to the peripheral edge of the magneto-optic recording film an annular groove extending in depth through the magneto-optic recording film to the transparent substrate; and forming the protecting film over the surfaces of the magneto-optic recording film and the annular groove.
公开/授权文献
- US4592193A Apparatus for packaging resiliently compressible articles 公开/授权日：1986-06-03
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