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    Magneto-optical recording medium and reproducing method for information recorder on the medium
    2.
    发明授权
    Magneto-optical recording medium and reproducing method for information recorder on the medium 失效
    具有改善磁层的磁光记录介质

    公开(公告)号：US06248439B1

    公开(公告)日：2001-06-19

    申请号：US08368607

    申请日：1995-01-04

    申请人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

    发明人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

    IPC分类号： G11B566

    CPC分类号： G11B11/10584 ,  G11B11/10515 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/12861 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magneto-optical recording medium capable of perfectly masking a mark adjacent to a mark to be reproduced thereby improving a reproduction output. The magneto-optical recording medium includes a transparent substrate, a magnetic reproducing layer laminated on the transparent substrate, a nonmagnetic intermediate layer laminated on the magnetic reproducing layer, and a magnetic recording layer laminated on the nonmagnetic intermediate layer. The reproducing layer has an easy direction of magnetization in a plane at room temperature, and has an easy direction of magnetization perpendicular to a film surface at a given temperature or higher. The nonmagnetic intermediate layer is thin enough to allow magnetostatic bond between the recording layer and the reproducing layer at the given temperature or higher. Instead of the nonmagnetic intermediate layer, a magnetic intermediate layer having an easy direction of magnetization in a plane from room temperature to its Curie temperature may be interposed between the reproducing layer and the recording layer.

    摘要翻译： 一种磁光记录介质，其能够完美地掩蔽与要再现的标记相邻的标记，从而改善再现输出。 磁光记录介质包括透明基板，层叠在透明基板上的磁性再现层，层叠在磁性再现层上的非磁性中间层以及层叠在非磁性中间层上的磁记录层。 再现层在室温下在平面中具有容易的磁化方向，并且在给定温度或更高温度下具有与膜表面垂直的易磁化方向。 非磁性中间层足够薄，以允许在给定温度或更高温度下记录层和再生层之间的静磁结合。 代替非磁性中间层，可以在再现层和记录层之间插入在从室温到其居里温度的平面中具有容易的磁化方向的磁性中间层。

    Magneto-optical recording medium and reproducing method for information recorded on the medium
    3.
    发明授权
    Magneto-optical recording medium and reproducing method for information recorded on the medium 失效
    用于记录在介质上的信息的磁光记录介质和再现方法

    公开(公告)号：US06356516B2

    公开(公告)日：2002-03-12

    申请号：US09732092

    申请日：2000-12-07

    申请人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

    发明人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

    IPC分类号： G11B1100

    CPC分类号： G11B11/10584 ,  G11B11/10515 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/12861 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magneto-optical recording medium capable of perfectly masking a mark adjacent to a mark to be reproduced thereby improvng reproduction output. The magneto-optical recording medium includes a transparent substrate, a magnetic reproducing layer laminated on the transparent substrate, a nonmagnetic intermediate layer laminated on the magnetic reproducing layer, and a magnetic recording layer laminated on the nonmagnetic intermediate layer. The reproducing layer has an easy direction of magnetization in a plane at room temperature, and has an easy direction of magnetization perpendicular to a film surface at a given temperature or higher. The nonmagnetic intermediate layer is thin enough to allow magnetostatic bond between the recording layer and the reproducing layer at the given temperature or higher. Instead of the nonmagnetic intermediate layer, a magnetic intermediate layer having an easy direction of magnetization in a plane from room temperature to its Curie temperature may be interposed between the reproducing layer and the recording layer.

    摘要翻译： 一种磁光记录介质，其能够完美地掩蔽与要再现的标记相邻的标记，从而提高再现输出。 磁光记录介质包括透明基板，层叠在透明基板上的磁性再现层，层叠在磁性再现层上的非磁性中间层以及层叠在非磁性中间层上的磁记录层。 再现层在室温下在平面中具有容易的磁化方向，并且在给定温度或更高温度下具有与膜表面垂直的易磁化方向。 非磁性中间层足够薄，以允许在给定温度或更高温度下记录层和再生层之间的静磁结合。 代替非磁性中间层，可以在再现层和记录层之间插入在从室温到其居里温度的平面中具有容易的磁化方向的磁性中间层。

    Magneto-optical recording medium and method for producing the same
    4.
    发明授权
    Magneto-optical recording medium and method for producing the same 失效
    磁光记录介质及其制造方法

    公开(公告)号：US5599605A

    公开(公告)日：1997-02-04

    申请号：US045737

    申请日：1993-04-14

    申请人： Keiji Shono ,  Ken Tamanoi ,  Sumio Kuroda ,  Koji Matsumoto

    发明人： Keiji Shono ,  Ken Tamanoi ,  Sumio Kuroda ,  Koji Matsumoto

    IPC分类号： G11B11/10 ,  G11B7/253 ,  G11B11/105 ,  H01F10/24 ,  H01F41/18 ,  G11B5/66 ,  B32B3/10

    CPC分类号： G11B7/253 ,  G11B11/10582 ,  G11B11/10586 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/24355

    摘要： A magneto-optical recording medium having a recording layer made of a bismuth-substituted garnet and deposited by a sputtering over an amorphous substrate of aluminosilicate or borosilicate glass, the recording medium including a garnet underlayer of either a double-layer or single-layer structure. The formation of an underlayer of a double-layer structure made of garnet reduces the level of noise due to light scattering at crystalline boundaries in the garnet film. The formation of an underlayer of a single-layer structure made of a garnet having a lower crystallization temperature than a YIG film is also effective to noise-level reduction. An underlayer has a surface smoothness corresponding to a roughness of approximately 10 .ANG., which is improved from the surface smoothness of a conventional underlayer comprising a YIG film.

    摘要翻译： 一种具有由铋取代的石榴石制成的记录层并通过溅射沉积在硅铝酸盐或硼硅酸盐玻璃的无定形基底上的磁光记录介质，所述记录介质包括双层或单层结构的石榴石底层 。 由石榴石制成的双层结构的底层的形成降低了由于在石榴石膜中的结晶边界处的光散射引起的噪声水平。 由具有比YIG膜低的结晶温度的石榴石制成的单层结构的底层的形成对于噪声水平的降低也是有效的。 底层具有对应于约10安培的粗糙度的表面平滑度，其从包含YIG膜的常规底层的表面平滑度得到改善。

    Magneto-optical recording medium capable of double mask readout
    6.
    发明授权
    Magneto-optical recording medium capable of double mask readout 失效

    公开(公告)号：US5740133A

    公开(公告)日：1998-04-14

    申请号：US654063

    申请日：1996-05-28

    申请人： Ken Tamanoi ,  Koji Matsumoto ,  Keiji Shono

    发明人： Ken Tamanoi ,  Koji Matsumoto ,  Keiji Shono

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

    CPC分类号： G11B11/10515 ,  G11B11/10586 ,  G11B11/10584 ,  Y10S428/90

    摘要： A magneto-optical recording medium of a three-layered structure (consisting of a readout layer, an intermediate layer, and a recording layer), capable of double-mask magnetically-induced super-resolution readout, has magnetic properties such that the exchange coupled force between the readout layer (a GdFeCo film) and the intermediate layer (a GdFe film) decrease with increasing temperature, while the exchange coupled force between the intermediate layer and the recording layer (a TbFeCo film) increase with increasing temperature. The magnetic property of the readout layer is transition-metal magnetization dominant, and that of the intermediate layer is rare-earth magnetization dominant. When reading the medium, a region (an intermediate-temperature transfer region) where the magnetization in the readout layer is oriented in the direction of magnetization in the recording layer, and a region (a high-temperature rear mask) where the magnetization in the readout layer is oriented in a second specific direction, are simultaneously formed within a beam spot from a state (a low-temperature front mask) in which the magnetization in the readout layer is oriented in a first specific direction, thus achieving a double mask condition in a single step. Overwrite recording and magnetically-induced super-resolution readout are realized on the same magneto-optical recording medium.

    Magneto-optical recording medium capable of double mask readout
    7.
    发明授权
    Magneto-optical recording medium capable of double mask readout 失效
    能够双面屏读出的磁光记录介质

    公开(公告)号：US6096444A

    公开(公告)日：2000-08-01

    申请号：US17649

    申请日：1998-02-02

    申请人： Ken Tamanoi ,  Koji Matsumoto ,  Keiji Shono

    发明人： Ken Tamanoi ,  Koji Matsumoto ,  Keiji Shono

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/60

    CPC分类号： G11B11/10515 ,  G11B11/10586 ,  G11B11/10584 ,  Y10S428/90

    摘要： A magneto-optical recording medium of a three-layered structure (consisting of a readout layer, an intermediate layer, and a recording layer), capable of double-mask magnetically-induced super-resolution readout, has magnetic properties such that the exchange coupled force between the readout layer (a GdFeCo film) and the intermediate layer (a GdFe film) decrease with increasing temperature, while the exchange coupled force between the intermediate layer and the recording layer (a TbFeCo film) increase with increasing temperature. The magnetic property of the readout layer is transition-metal magnetization dominant, and that of the intermediate layer is rare-earth magnetization dominant. When reading the medium, a region (an intermediate-temperature transfer region) where the magnetization in the readout layer is oriented in the direction of magnetization in the recording layer, and a region (a high-temperature rear mask) where the magnetization in the readout layer is oriented in a second specific direction, are simultaneously formed within a beam spot from a state (a low-temperature front mask) in which the magnetization in the readout layer is oriented in a first specific direction, thus achieving a double mask condition in a single step. Overwrite recording and magnetically-induced super-resolution readout are realized on the same magneto-optical recording medium.

    摘要翻译： 由磁感应超分辨率读出双重掩模的三层结构（由读出层，中间层和记录层组成）的磁光记录介质具有磁性，使得交换耦合 读出层（GdFeCo膜）与中间层（GdFe膜）之间的力随着温度的升高而降低，而中间层和记录层（TbFeCo膜）之间的交换耦合力随着温度的升高而增加。 读出层的磁特性是过渡金属磁化优势，中间层的磁性优于稀土磁化。 当读取介质时，读出层中的磁化在记录层中的磁化方向上取向的区域（中间温度转移区域）以及在记录层中的磁化强度的区域（高温后掩模） 读出层在第二特定方向上取向，同时形成在读出层的磁化沿第一特定方向取向的状态（低温前掩模）的光束点内，从而实现双掩模条件 在一个单一的步骤。 在相同的磁光记录介质上实现重写记录和磁感应超分辨率读出。

    Master medium for magnetic transfer, magnetic transferring and recording method, slave medium for magnetic recording, and method for producing a master medium for magnetic transfer
    9.
    发明授权
    Master medium for magnetic transfer, magnetic transferring and recording method, slave medium for magnetic recording, and method for producing a master medium for magnetic transfer 失效
    用于磁转移，磁转移和记录方法的主介质，用于磁记录的从属介质，以及用于产生用于磁转移的主介质的方法

    公开(公告)号：US06865039B2

    公开(公告)日：2005-03-08

    申请号：US10101369

    申请日：2002-03-20

    申请人： Shingo Hamaguchi ,  Sumio Kuroda ,  Kazuyuki Ozaki ,  Ken Tamanoi ,  Koji Matsumoto

    发明人： Shingo Hamaguchi ,  Sumio Kuroda ,  Kazuyuki Ozaki ,  Ken Tamanoi ,  Koji Matsumoto

    IPC分类号： G11B5/65 ,  G11B5/66 ,  G11B5/84 ,  G11B5/86

    CPC分类号： G11B5/66 ,  G11B5/865

    摘要： A master medium for magnetic transfer includes a substrate having a concave portion formed in its surface corresponding to a pattern of recorded information to be transferred; a first perpendicular ferromagnetic layer deposited in the concave portion; and a second perpendicular ferromagnetic layer layered on the substrate surface and the first perpendicular ferromagnetic layer surface. The substrate surface and the first perpendicular ferromagnetic layer surface are flattened to form a single flat surface. In the master medium for magnetic transfer, a magnetic field change in a direction parallel to the substrate surface at a magnetization boundary of the first perpendicular ferromagnetic layer is steep. Since the influence of the change of an external magnetic field is reduced, it is possible to perform accurate transfer from the master medium for magnetic transfer to a slave medium for magnetic recording.

    摘要翻译： 用于磁转移的主介质包括在其表面上形成有与要传送的记录信息的图案相对应的凹部的基板; 沉积在凹部中的第一垂直铁磁层; 以及层叠在基板表面和第一垂直铁磁层表面上的第二垂直铁磁层。 衬底表面和第一垂直铁磁层表面被平坦化以形成单个平坦表面。 在用于磁转移的主介质中，在第一垂直铁磁层的磁化边界处，平行于衬底表面的方向上的磁场变化是陡峭的。 由于外部磁场的变化的影响减小，因此能够从用于磁性传递的主介质到用于磁记录的从属介质的精确传送。