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31. 发明申请

US20060083154A1 Optical recording medium, optical recording method, optical reproducing method, optical recording apparatus, and optical reproducing apparatus 失效
标题翻译：光记录介质，光学记录方法，光学再现方法，光学记录装置和光学再现装置
公开(公告)号：US20060083154A1
公开(公告)日：2006-04-20
申请号：US11218788
申请日：2005-09-06
申请人： Morio Nakatani , Satoshi Sumi , Masahiro Nakata
发明人： Morio Nakatani , Satoshi Sumi , Masahiro Nakata
IPC分类号： G11B7/24
CPC分类号： G11B7/24079 , G11B7/24085 , G11B7/26
摘要： A substrate in which a minute ruggedness structure including columnar projections is formed in a track shape is prepared. The pitch of the columnar projections of the ruggedness structure is set such that a plurality of the columnar projections is within a beam spot. A flat portion is disposed between adjacent tracks. A reflecting layer is formed on the substrate. The flat portion becomes a mirror surface because of the formation of the reflecting layer. The reflectance of the ruggedness structure becomes significantly lower than the reflectance of the flat portion. When the ruggedness structure is irradiated with high-power laser light, a portion of the ruggedness structure is raised to a reflecting layer side and flattened. At this time, reflectance of the raised portion becomes higher than reflectance of a non-raised portion. When a track including the ruggedness structure is irradiated with high-power pulse laser light, signal recording based on a change in reflectance is possible.
摘要翻译：制备其中形成具有轨道形状的包括柱状突起的微小凹凸结构的基板。坚固结构的柱状突起的间距被设定为使得多个柱状突起在光束点内。平坦部分设置在相邻的轨道之间。在基板上形成反射层。由于反射层的形成，平坦部分成为镜面。粗糙度结构的反射率明显低于平坦部分的反射率。当用高功率激光照射坚固结构时，一部分凹凸结构被升高到反射层侧并变平。此时，升高部的反射率比未升高部的反射率高。当使用高功率脉冲激光照射包括坚固结构的轨迹时，可以基于反射率的变化进行信号记录。

32. 发明申请

US20060053433A1 Magneto-optical recording medium and layer structure 失效
标题翻译：磁光记录介质和层结构
公开(公告)号：US20060053433A1
公开(公告)日：2006-03-09
申请号：US11204106
申请日：2005-08-16
申请人： Morio Nakatani , Satoshi Sumi
发明人： Morio Nakatani , Satoshi Sumi
IPC分类号： G11B7/24 , G11B23/03
CPC分类号： G11B11/10584 , B82Y10/00 , G11B5/743 , G11B11/10528
摘要： To provide a magneto-optical recording medium and a layer structure with which it becomes possible to effectively achieve an increase of a Kerr rotation angle and improvements of a recording sensitivity and a recording density by using a simple construction. A minute ruggedness structure is formed on a substrate and a magnetic layer is formed thereon. The ruggedness structure is reflected in the magnetic layer. With the reflected ruggedness structure, multiple reflection occurs to reproduction laser light. When multiple reflection occurs to reproduction laser light, a Kerr rotation action is superimposed each time reflection is repeated at the magnetic layer. As a result, an increasing effect on a Kerr rotation angle with respect to the reproduction laser light is expected. Also, with the ruggedness structure reflected in the magnetic layer, the surface area of the magnetic layer is increased. Therefore, temperature rise of the magnetic layer by laser light irradiation is promoted. In addition, an applied magnetic field is concentrated in the tip end portions of the ruggedness structure, so it becomes possible to increase the magnetic field strength of the tip end portions of the ruggedness structure. As a result, the recording sensitivity of the magnetic layer with respect to the laser light and the applied magnetic field is enhanced.
摘要翻译：为了提供磁光记录介质和层结构，通过使用简单的结构，可以有效地实现克尔旋转角度的提高和记录灵敏度和记录密度的提高。在基板上形成微小的凹凸结构，并在其上形成磁性层。坚固结构反映在磁性层中。利用反射的坚固结构，对再现激光发生多次反射。当再现激光发生多次反射时，每次在磁性层反复反射时，叠加克尔旋转动作。结果，期望相对于再现激光对克尔旋转角的增加的影响。此外，由于在磁性层中反射的坚固结构，磁性层的表面积增加。因此，促进了通过激光照射的磁性层的温度上升。此外，施加的磁场集中在粗糙结构的末端部分，从而可以增加粗糙结构的末端部分的磁场强度。结果，增强了磁性层相对于激光的记录灵敏度和所施加的磁场。

33. 发明授权

US06169714A Apparatus and method for recording/reproducing magneto-optical information 失效
标题翻译：用于记录/再现磁光信息的装置和方法
公开(公告)号：US06169714A
公开(公告)日：2001-01-02
申请号：US09173069
申请日：1998-10-16
申请人： Yasuhito Tanaka , Masaaki Kurebayashi , Takeshi Maeda , Hitoshi Watanabe , Tetsu Watanabe , Shigemi Maeda , Satoshi Sumi , Nobuhide Matsubayashi , Michio Matsuura
发明人： Yasuhito Tanaka , Masaaki Kurebayashi , Takeshi Maeda , Hitoshi Watanabe , Tetsu Watanabe , Shigemi Maeda , Satoshi Sumi , Nobuhide Matsubayashi , Michio Matsuura
IPC分类号： G11B709
CPC分类号： G11B7/126 , G11B7/094 , G11B7/0941 , G11B7/0945 , G11B7/0956 , G11B11/10515 , G11B11/10576 , G11B11/10595
摘要： A magneto-optical information recording/reproducing apparatus in which a magneto-optical information recording medium at least including a first magnetic film having perpendicular magnetic anisotropy, and a second magnetic film to which information recorded on the first magnetic film is transferred by irradiation of a laser beam, is used so that a readout laser beam is irradiated onto the second magnetic film to thereby readout the information transferred to the second magnetic film. The apparatus includes a 2-split detection circuit for receiving the readout laser beam reflected from the second magnetic film of the recording medium, and a subtraction circuit in which output signals of the two detection elements of the 2-split detection circuit are subtracted from each other to generate a differential signal. The apparatus further comprises a circuit for making a spot of the laser beam jump one track before readout of the information from the magneto-optical information recording medium, a positive/negative balance correction circuit for detecting an amplitude ratio between positive and negative side amplitudes in a track jump signal generated in the differential signal from the subtraction circuit in response to the track jump to thereby output a correction signal in accordance with the amplitude ratio, and an addition circuit for adding the correction signal to the differential signal to thereby generate a tracking error signal for tracking control used in readout of the magneto-optical information from the magneto-optical information recording medium.
摘要翻译：一种磁光信息记录/再现装置，其中至少包括具有垂直磁各向异性的第一磁性膜的磁光信息记录介质和第二磁性膜，通过照射使用激光束，使得读出的激光束照射到第二磁性膜上，从而读出传递到第二磁性膜的信息。该装置包括用于接收从记录介质的第二磁性膜反射的读出激光束的二分割检测电路，以及减法电路，其中从每个减去2分割检测电路的两个检测元件的输出信号另外产生差分信号。该装置还包括一个电路，用于在从磁光信息记录介质读出信息之前使激光束的点跳跃到一个轨道;正/负平衡校正电路，用于检测正，负振幅之间的振幅比，响应于轨道跳跃从减法电路产生的差分信号中产生的轨道跳转信号，从而根据振幅比输出校正信号;以及加法电路，用于将校正信号加到差分信号上，从而产生跟踪用于从磁光信息记录介质读出磁光信息的跟踪控制的误差信号。

34. 发明授权

US5968678A Magneto-optical recording medium and manufacturing method thereof 失效
标题翻译：磁光记录介质及其制造方法
公开(公告)号：US5968678A
公开(公告)日：1999-10-19
申请号：US689149
申请日：1996-07-30
申请人： Kenji Tanase , Atsushi Yamaguchi , Yoshihisa Suzuki , Satoshi Sumi , Yoshiharu Uchihara , Seiji Murata , Kenji Torasawa
发明人： Kenji Tanase , Atsushi Yamaguchi , Yoshihisa Suzuki , Satoshi Sumi , Yoshiharu Uchihara , Seiji Murata , Kenji Torasawa
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/1051 , G11B11/10506 , G11B11/10515 , G11B11/10586 , G11B11/10595 , Y10S428/90
摘要： In magneto-optical recording medium, on a transparent substrate of polycarbonate resin, an SiN film having the thickness of 600 to 800 .ANG. and surface roughness Rmax of at most 10 nm is formed. On the SiN film, a GdFeCo reading layer having the thickness of 800 to 1200 .ANG. with Gd content of 30 to 36 at. % and Co content of 12 to 50 at. % is formed. On the reading layer, a TbFeCo recording layer of which Co content is 10 to 16 at. % is formed. The recording layer is a perpendicular magnetization film, and the reading layer is an in-plane magnetization film. At the time of reading, the reading and recording layers are heated, and the direction of magnetization of the recording layer is transferred to the reading layer only in the prescribed heated area. Information can be read only from the transferred portion, and thus a super resolution effect is obtained. When Kerr rotation angle .theta..sub.K is measured for the light reflected from the reading layer while the temperatures of the reading and recording layers are elevated, .theta..sub.K is approximately in proportion to Cth power of the elevated temperature t, wherein C is at least 8.0.
摘要翻译：在磁光记录介质中，在聚碳酸酯树脂的透明基板上形成厚度为600〜800的SiN膜，表面粗糙度Rmax为10nm以下。在SiN膜上，具有800〜1200厚度的GdFeCo读取层，Gd含量为30〜36at。％，Co含量为12〜50。％形成了。在读取层上，Co含量为10〜16at的TbFeCo记录层。％形成了。记录层是垂直磁化膜，读取层是面内磁化膜。在读取时，读取和记录层被加热，并且仅在规定的加热区域中记录层的磁化方向被转移到读取层。信息只能从传送部分读取，从而获得超分辨率效果。当读取层和记录层的温度升高时，对于从读取层反射的光测量克尔旋转角θK时，θK与升高温度t的Cth功率大致成比例，其中C至少为8.0。

35. 发明授权

US5327414A Signal recording method for optical disk and apparatus therefor 失效
标题翻译：光盘的信号记录方法及其装置
公开(公告)号：US5327414A
公开(公告)日：1994-07-05
申请号：US136617
申请日：1993-10-15
申请人： Masami Makino , Satoshi Sumi
发明人： Masami Makino , Satoshi Sumi
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/125 , G11B11/105 , G11B5/09
CPC分类号： G11B7/0045 , G11B11/10506 , G11B11/10528 , G11B11/1053
摘要： A signal recording method for an optical disk and an apparatus therefor wherein a turn-off duration, during which a laser beam is turned-off, of a binary signal to be recorded on the optical disk is elongated and an irradiation duration, during which the laser beam is irradiated, of the binary signal is shortened, so that it is possible to avoid influence of thermal diffusion which is caused by irradiating the laser beam corresponding to the irradiation duration on the optical disk and to obtain a more precise reproduced signal in comparison with that obtained by prior arts.
摘要翻译：一种用于光盘的信号记录方法及其装置，其中要记录在光盘上的二进制信号的激光束截止的关闭持续时间是延长的以及照射持续时间，其中激光束被照射，二进制信号被缩短，从而可以避免由于将与照射持续时间相对应的激光束照射在光盘上而产生的热扩散的影响，并获得比较精确的再现信号与现有技术获得的。

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