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1. 发明授权

US07012857B2 Magneto optical recording medium having a multilayer recording film of different thickness 失效
标题翻译：具有不同厚度的多层记录膜的磁光记录介质
公开(公告)号：US07012857B2
公开(公告)日：2006-03-14
申请号：US10297012
申请日：2001-05-28
申请人： Motoyoshi Murakami , Yuko Kawaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Yuko Kawaguchi , Yasumori Hino
IPC分类号： G11B11/00
CPC分类号： G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： 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.
摘要翻译：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

US20060002243A1 Manufacturing method for magneto optical recording medium 审中-公开
标题翻译：磁光记录介质的制造方法
公开(公告)号：US20060002243A1
公开(公告)日：2006-01-05
申请号：US11220067
申请日：2005-09-06
申请人： Motoyoshi Murakami , Yuko Kawaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Yuko Kawaguchi , Yasumori Hino
IPC分类号： G11B11/00
CPC分类号： G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： 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.
摘要翻译：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

US07151716B2 Magneto-optical recording medium having a transfer control layer 失效
标题翻译：具有转印控制层的磁光记录介质
公开(公告)号：US07151716B2
公开(公告)日：2006-12-19
申请号：US10902328
申请日：2004-07-29
申请人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
IPC分类号： G11B11/00
CPC分类号： G11B11/10578 , G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： 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.
摘要翻译：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。

4. 发明授权

US06975564B2 Magneto-optical recording medium for use in domain wall displacement detection system, and method for producing the same 失效
标题翻译：用于畴壁位移检测系统的磁光记录介质及其制造方法
公开(公告)号：US06975564B2
公开(公告)日：2005-12-13
申请号：US10699937
申请日：2003-11-03
申请人： Kiyoshi Uchida , Yasumori Hino , Motoyoshi Murakami , Norio Miyatake
发明人： Kiyoshi Uchida , Yasumori Hino , Motoyoshi Murakami , Norio Miyatake
IPC分类号： B32B3/02 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10582 , B32B3/02 , G11B11/10578 , G11B11/10584 , G11B11/10586 , Y10T428/31
摘要： An optical disk of the present invention includes a substrate and a recording layer disposed above the substrate, and reproduces an information signal by a DWDD system, using light incident from the substrate side. The optical disk further includes a first dielectric layer disposed between the substrate and the recording layer and a second dielectric layer disposed on the recording layer opposite to the substrate, wherein the recording layer is initialized with light having a wavelength λ incident from the second dielectric layer side, and the thickness of the second dielectric layer is in a range of λ/(12×n) to λ/(2×n) (where n is a refractive index of the second dielectric layer).
摘要翻译：本发明的光盘包括基板和设置在基板上方的记录层，并且使用从基板侧入射的光由DWDD系统再现信息信号。光盘还包括设置在基板和记录层之间的第一介质层和设置在与基板相对的记录层上的第二介电层，其中记录层由具有从第二介电层入射的波长λ的光初始化并且第二电介质层的厚度在λ/（12xn）至λ/（2xn）（其中n是第二介电层的折射率）的范围内。

5. 发明授权

US06767697B2 Magneto-optical disk and method for producing same by initializing with a laser having a predetermined wavelength 失效
标题翻译：磁光盘及其制造方法，通过用具有预定波长的激光进行初始化
公开(公告)号：US06767697B2
公开(公告)日：2004-07-27
申请号：US10038189
申请日：2001-10-24
申请人： Kiyoshi Uchida , Yasumori Hino , Motoyoshi Murakami , Norio Miyatake
发明人： Kiyoshi Uchida , Yasumori Hino , Motoyoshi Murakami , Norio Miyatake
IPC分类号： G11B11105
CPC分类号： G11B11/10582 , B32B3/02 , G11B11/10578 , G11B11/10584 , G11B11/10586 , Y10T428/31
摘要： A magneto-optical disk of the present invention includes a substrate and a recording layer disposed above the substrate, and reproduces an information signal by a DWDD system, using light incident from the substrate side. The optical disk further includes a first dielectric layer disposed between the substrate and the recording layer and a second dielectric layer disposed on the recording layer opposite to the substrate, wherein the recording layer is initialized with light having a wavelength &lgr; incident from the second dielectric layer side, and the thickness of the second dielectric layer is in a range of &lgr;/(12×n) to &lgr;/(2×n) (where n is a refractive index of the second dielectric layer).
摘要翻译：本发明的磁光盘包括衬底和设置在衬底上方的记录层，并且使用从衬底侧入射的光由DWDD系统再现信息信号。光盘还包括设置在基板和记录层之间的第一介质层和设置在与基板相对的记录层上的第二介电层，其中记录层由具有从第二介电层入射的波长λ的光初始化并且第二电介质层的厚度在λ/（12xn）至λ/（2xn）（其中n是第二介电层的折射率）的范围内。

6. 发明申请

US20050002318A1 Magneto-optical recording medium and reproducing method thereof 失效
标题翻译：磁光记录介质及其再现方法
公开(公告)号：US20050002318A1
公开(公告)日：2005-01-06
申请号：US10902328
申请日：2004-07-29
申请人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
IPC分类号： G11B3/00 , G11B11/00 , G11B11/105
CPC分类号： G11B11/10578 , G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： 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.
摘要翻译：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

US20070058494A1 MAGNETO-OPTICAL RECORDING MEDIUM HAVING A TRANSFER CONTROL LAYER 审中-公开
标题翻译：具有传输控制层的磁光记录介质
公开(公告)号：US20070058494A1
公开(公告)日：2007-03-15
申请号：US11556839
申请日：2006-11-06
申请人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
IPC分类号： G11B11/00
CPC分类号： G11B11/10578 , G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： 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.
摘要翻译：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

US06791908B2 Magneto-optical recording medium having a transfer control layer 失效
标题翻译：具有转印控制层的磁光记录介质
公开(公告)号：US06791908B2
公开(公告)日：2004-09-14
申请号：US10308791
申请日：2002-12-03
申请人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
IPC分类号： G11B1100
CPC分类号： G11B11/10578 , G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： 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.
摘要翻译：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。

9. 发明授权

US06504797B1 Magneto-optical recording medium having multiple magnetic layers and reproducing method thereof 失效
标题翻译：具有多个磁性层的磁光记录介质及其再现方法
公开(公告)号：US06504797B1
公开(公告)日：2003-01-07
申请号：US09603492
申请日：2000-06-23
申请人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
发明人： Motoyoshi Murakami , Takeshi Sakaguchi , Yasumori Hino
IPC分类号： G11B1100
CPC分类号： G11B11/10578 , G11B11/10515 , G11B11/10582 , G11B11/10584 , G11B11/10586
摘要： A magneto-optical recording medium includes a first magnetic layer and a second magnetic layer. The first magnetic layer is an in-plane magnetized film at room temperature, but changes to a perpendicular magnetized film at a predetermined temperature higher than room temperature, and is thin enough to allow a light beam to pass through it. The second magnetic layer has perpendicular magnetic anisotropy and is arranged to allow magnetic coupling to the first magnetic layer when a light beam for reproduction comes from the first magnetic layer side. The rotation of the polarization plane of a light beam which is reflected off the first magnetic layer and the rotation of the polarization plane of the light beam which passed through the first magnetic layer and reflected off the second magnetic layer compensate each other, thereby canceling each other.
摘要翻译：磁光记录介质包括第一磁性层和第二磁性层。第一磁性层是在室温下为平面内的磁化膜，但在高于室温的预定温度下变为垂直磁化膜，并且足够薄以允许光束通过。第二磁性层具有垂直的磁各向异性，并且被布置成当用于再现的光束来自第一磁性层侧时允许磁耦合到第一磁性层。从第一磁性层反射的光束的偏振面的旋转以及通过第一磁性层并从第二磁性层反射的光束的偏振面的旋转彼此补偿，从而取消每个其他。

10. 发明授权

US08514682B2 Reproduction signal evaluation method, reproduction signal evaluation unit, and optical disk device adopting the same 失效
标题翻译：再现信号评估方法，再现信号评估单元和采用该方法的光盘装置
公开(公告)号：US08514682B2
公开(公告)日：2013-08-20
申请号：US13434995
申请日：2012-03-30
申请人： Harumitsu Miyashita , Yasumori Hino , Junya Shiraishi , Shoei Kobayashi
发明人： Harumitsu Miyashita , Yasumori Hino , Junya Shiraishi , Shoei Kobayashi
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10046 , G11B20/10055 , G11B20/1012 , G11B20/10212 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10398 , G11B20/10425 , G11B20/10472 , G11B20/10481 , G11B20/1816 , G11B20/182 , G11B20/22 , G11B2220/2541
摘要： A reproduction signal evaluation method evaluates the quality of a reproduction signal reproduced from an information recording medium based on a binary signal generated from the reproduction signal using a PRML signal processing system. A pattern extraction step extracts, from the binary signal, a specific state transition pattern which has the possibility of causing a bit error; a step computes a differential metric based on the binary signal; an extraction step extracts the differential metric which is not greater than a predetermined signal processing threshold; a step determines a mean value of the differential metrics which are not greater than the signal processing threshold and extracted in the extraction step; a standard deviation computing step determines a standard deviation which corresponds to an error rate predicted from the mean value; and an evaluation step evaluates a quality of the reproduction signal using the standard deviation.
摘要翻译：再现信号评估方法基于使用PRML信号处理系统从再现信号生成的二进制信号来评估从信息记录介质再现的再现信号的质量。模式提取步骤从二进制信号中提取具有引起位错误的可能性的特定状态转换模式; 步骤基于二进制信号计算差分度量; 提取步骤提取不大于预定信号处理阈值的差分度量; 步骤确定不大于信号处理阈值并在提取步骤中提取的差分度量的平均值; 标准偏差计算步骤确定与从平均值预测的误差率对应的标准偏差; 并且评估步骤使用标准偏差来评估再现信号的质量。

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