发明授权
- 专利标题： Magneto-optical recording medium, manufacturing method thereof and magneto-optical data recording and playback device
- 专利标题（中）： 磁光记录介质，其制造方法和磁光数据记录和重放装置
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申请号： US11475697申请日： 2006-06-26
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公开(公告)号： US07368146B2公开(公告)日： 2008-05-06
- 发明人: Akinori Furuya , Hiroshi Yoshikawa , Takaya Tanabe , Manabu Yamamoto , Toshifumi Ohkubo , Laurence Bouet , Philippe Tailhades , Corine Despax , Abel Rousset
- 申请人： Akinori Furuya , Hiroshi Yoshikawa , Takaya Tanabe , Manabu Yamamoto , Toshifumi Ohkubo , Laurence Bouet , Philippe Tailhades , Corine Despax , Abel Rousset
- 申请人地址： JP Tokyo FR Paris Cedex
- 专利权人： Nippon Telegraph and Telephone Corporation,The Centre National de la Recherche Scientifique
- 当前专利权人： Nippon Telegraph and Telephone Corporation,The Centre National de la Recherche Scientifique
- 当前专利权人地址： JP Tokyo FR Paris Cedex
- 代理机构： Thelen Reid Brown Raysman & Steiner LLP
- 优先权： JP10-244156 19980828; JP11-095518 19990401; WOPCT/JP99/04674 19990830
- 主分类号： B05D5/12
- IPC分类号： B05D5/12
摘要：
A magneto-optical recording medium has a recording layer and a reflective layer on a substrate. The recording layer has a layered structure in which at least one spinel ferrite (or rutile-type oxide or hematite) layer and at least one garnet ferrite layer are piled together. It is preferable that the layered structure is formed on tracks where data are recorded. A manufacturing method comprises the steps of heat treatment in the range of 500-700° C., preferably 600-630° C., after the formation of the recording layer. In the magneto-optical recording and playback device to record and play back data, the wavelength of light for recording data is different from that for reading data, which is preferable for a magneto-optical recording medium comprising a garnet ferrite layer.
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