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    • 1. 发明授权
    • Magneto optical recording medium having a multilayer recording film of different thickness
    • 具有不同厚度的多层记录膜的磁光记录介质
    • US07012857B2
    • 2006-03-14
    • US10297012
    • 2001-05-28
    • Motoyoshi MurakamiYuko KawaguchiYasumori Hino
    • Motoyoshi MurakamiYuko KawaguchiYasumori Hino
    • G11B11/00
    • G11B11/10515G11B11/10582G11B11/10584G11B11/10586
    • A magneto optical recording medium capable of stable recording and readout using a DWDD system is provided. The magneto optical recording medium of the present invention comprises an optical disk substrate and a multilayer recording film comprising essentially a readout layer, an intermediate layer, and a recording layer successively formed on top of the substrate. The readout layer has a smaller magnetic domain wall coercivity than the recording layer. The intermediate layer comprises a magnetic layer whose Curie temperature is lower than the readout layer and the recording layer. A recorded/readout magnetic domain corresponding to recorded/readout information is formed only in a groove area of the optical disk substrate. The thickness of the recording film at the boundary between mutually adjacent recording track areas is smaller than the thickness of the recording film in the center portions of the recording track areas.
    • 提供了能够使用DWDD系统稳定记录和读出的磁光记录介质。 本发明的磁光记录介质包括光盘基片和多层记录膜,该多层记录膜基本上包括依次形成在基底上的读出层,中间层和记录层。 读出层具有比记录层更小的磁畴壁矫顽力。 中间层包括居里温度低于读出层和记录层的磁性层。 与记录/读出信息相对应的记录/读出磁畴仅形成在光盘基板的槽区域中。 相邻的记录轨道区域之间的边界处的记录膜的厚度小于记录轨道区域的中心部分中记录膜的厚度。
    • 2. 发明申请
    • Manufacturing method for magneto optical recording medium
    • 磁光记录介质的制造方法
    • US20060002243A1
    • 2006-01-05
    • US11220067
    • 2005-09-06
    • Motoyoshi MurakamiYuko KawaguchiYasumori Hino
    • Motoyoshi MurakamiYuko KawaguchiYasumori Hino
    • G11B11/00
    • G11B11/10515G11B11/10582G11B11/10584G11B11/10586
    • A magneto optical recording medium capable of stable recording and readout using a DWDD system is provided. The magneto optical recording medium of the present invention comprises an optical disk substrate and a multilayer recording film comprising essentially a readout layer, an intermediate layer, and a recording layer successively formed on top of the substrate. The readout layer has a smaller magnetic domain wall coercivity than the recording layer. The intermediate layer comprises a magnetic layer whose Curie temperature is lower than the readout layer and the recording layer. A recorded/readout magnetic domain corresponding to recorded/readout information is formed only in a groove area of the optical disk substrate. The thickness of the recording film at the boundary between mutually adjacent recording track areas is smaller than the thickness of the recording film in the center portions of the recording track areas.
    • 提供了能够使用DWDD系统稳定记录和读出的磁光记录介质。 本发明的磁光记录介质包括光盘基片和多层记录膜,该多层记录膜基本上包括依次形成在基底上的读出层,中间层和记录层。 读出层具有比记录层更小的磁畴壁矫顽力。 中间层包括居里温度低于读出层和记录层的磁性层。 与记录/读出信息相对应的记录/读出磁畴仅形成在光盘基板的槽区域中。 相邻的记录轨道区域之间的边界处的记录膜的厚度小于记录轨道区域的中心部分中记录膜的厚度。
    • 3. 发明授权
    • Magneto-optical recording medium having a transfer control layer
    • 具有转印控制层的磁光记录介质
    • US07151716B2
    • 2006-12-19
    • US10902328
    • 2004-07-29
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • G11B11/00
    • G11B11/10578G11B11/10515G11B11/10582G11B11/10584G11B11/10586
    • A magneto-optical recording medium, including a recording layer, a transfer control layer magnetically coupled to the recording layer, and a reproduction layer. The recording layer includes a recording magnetic domain in which information is recorded by a magnetization direction vertical to the surface of the film. The reproduction layer includes a reproduction magnetic domain in which information in the recording layer is transferred and formed as a magnetization direction by magnetic coupling. The direction of magnetization of the recording magnetic domain of the recording layer and the direction of magnetization of the transfer control layer corresponding to the recording magnetic domain are in opposite directions in at least part of the range of temperatures less than a transfer temperature where the reproduction magnetic domain is transferred to the reproduction layer. The Curie point temperature of the transfer control layer is higher than this transfer temperature.
    • 包括记录层,磁耦合到记录层的转移控制层和再现层的磁光记录介质。 记录层包括通过垂直于胶片表面的磁化方向记录信息的记录磁畴。 再现层包括其中记录层中的信息通过磁耦合传送并形成为磁化方向的再现磁畴。 记录层的记录磁畴的磁化方向和对应于记录磁畴的转印控制层的磁化方向在至少部分温度范围内的方向相反,转印温度小于再现的转印温度 磁畴被传送到再现层。 转移控制层的居里点温度高于此转印温度。
    • 6. 发明申请
    • Magneto-optical recording medium and reproducing method thereof
    • 磁光记录介质及其再现方法
    • US20050002318A1
    • 2005-01-06
    • US10902328
    • 2004-07-29
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • G11B3/00G11B11/00G11B11/105
    • G11B11/10578G11B11/10515G11B11/10582G11B11/10584G11B11/10586
    • A magneto-optical recording medium, including a recording layer, a transfer control layer magnetically coupled to the recording layer, and a reproduction layer. The recording layer includes a recording magnetic domain in which information is recorded by a magnetization direction vertical to the surface of the film. The reproduction layer includes a reproduction magnetic domain in which information in the recording layer is transferred and formed as a magnetization direction by magnetic coupling. The direction of magnetization of the recording magnetic domain of the recording layer and the direction of magnetization of the transfer control layer corresponding to the recording magnetic domain are in opposite directions in at least part of the range of temperatures less than a transfer temperature where the reproduction magnetic domain is transferred to the reproduction layer. The Curie point temperature of the transfer control layer is higher than this transfer temperature.
    • 包括记录层,磁耦合到记录层的转移控制层和再现层的磁光记录介质。 记录层包括通过垂直于胶片表面的磁化方向记录信息的记录磁畴。 再现层包括其中记录层中的信息通过磁耦合传送并形成为磁化方向的再现磁畴。 记录层的记录磁畴的磁化方向和对应于记录磁畴的转印控制层的磁化方向在至少部分小于转印温度的范围内的方向上是相反的,其中再生 磁畴被传送到再现层。 转移控制层的居里点温度高于此转印温度。
    • 7. 发明申请
    • MAGNETO-OPTICAL RECORDING MEDIUM HAVING A TRANSFER CONTROL LAYER
    • 具有传输控制层的磁光记录介质
    • US20070058494A1
    • 2007-03-15
    • US11556839
    • 2006-11-06
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • G11B11/00
    • G11B11/10578G11B11/10515G11B11/10582G11B11/10584G11B11/10586
    • A magneto-optical recording medium, including a recording layer, a transfer control layer magnetically coupled to the recording layer, and a reproduction layer. The recording layer includes a recording magnetic domain in which information is recorded by a magnetization direction vertical to the surface of the film. The reproduction layer includes a reproduction magnetic domain in which information in the recording layer is transferred and formed as a magnetization direction by magnetic coupling. The direction of magnetization of the recording magnetic domain of the recording layer and the direction of magnetization of the transfer control layer corresponding to the recording magnetic domain are in opposite directions in at least part of the range of temperatures less than a transfer temperature where the reproduction magnetic domain is transferred to the reproduction layer. The Curie point temperature of the transfer control layer is higher than this transfer temperature.
    • 包括记录层,磁耦合到记录层的转移控制层和再现层的磁光记录介质。 记录层包括通过垂直于胶片表面的磁化方向记录信息的记录磁畴。 再现层包括其中记录层中的信息通过磁耦合传送并形成为磁化方向的再现磁畴。 记录层的记录磁畴的磁化方向和对应于记录磁畴的转印控制层的磁化方向在至少部分小于转印温度的范围内的方向上是相反的,其中再生 磁畴被传送到再现层。 转移控制层的居里点温度高于此转印温度。
    • 8. 发明授权
    • Magneto-optical recording medium having a transfer control layer
    • 具有转印控制层的磁光记录介质
    • US06791908B2
    • 2004-09-14
    • US10308791
    • 2002-12-03
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • Motoyoshi MurakamiTakeshi SakaguchiYasumori Hino
    • G11B1100
    • G11B11/10578G11B11/10515G11B11/10582G11B11/10584G11B11/10586
    • A magneto-optical recording medium, including a recording layer, a transfer control layer magnetically coupled to the recording layer, and a reproduction layer. The recording layer includes a recording magnetic domain in which information is recorded by a magnetization direction vertical to the surface of the film. The reproduction layer includes a reproduction magnetic domain in which information in the recording layer is transferred and formed as a magnetization direction by magnetic coupling. The direction of magnetization of the recording magnetic domain of the recording layer and the direction of magnetization of the transfer control layer corresponding to the recording magnetic domain are in opposite directions in at least part of the range of temperatures less than a transfer temperature where the reproduction magnetic domain is transferred to the reproduction layer. The Curie point temperature of the transfer control layer is higher than this transfer temperature.
    • 包括记录层,磁耦合到记录层的转移控制层和再现层的磁光记录介质。 记录层包括通过垂直于胶片表面的磁化方向记录信息的记录磁畴。 再现层包括其中记录层中的信息通过磁耦合传送并形成为磁化方向的再现磁畴。 记录层的记录磁畴的磁化方向和与记录磁畴相对应的转印控制层的磁化方向在至少部分小于转印温度的范围内的方向上处于相反的方向 磁畴被传送到再现层。 转移控制层的居里点温度高于此转印温度。