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    Magneto-optical memory element
    1.
    再颁专利
    Magneto-optical memory element 失效
    磁光存储元件

    公开(公告)号：USRE35629E

    公开(公告)日：1997-10-14

    申请号：US136019

    申请日：1993-10-14

    申请人： Yoshiteru Murakami ,  Akira Takahashi ,  Kazuo Van ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Kenji Ohta

    发明人： Yoshiteru Murakami ,  Akira Takahashi ,  Kazuo Van ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Kenji Ohta

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B11/10584 ,  G11B11/10586

    摘要： A magneto-optical memory element has a multi-layer construction in the order from a side first receiving light from a light-source which includes a first transparent dielectric film, a rare earth transition metal alloy film, a second transparent dielectric film and a reflective film. The magneto-optical device uses circular dichroism effect of a magnetic mater for reading information. The rare earth transition metal alloy film has a refractive index represented by n.+-..DELTA.n wherein n=3.2-3.55i and .DELTA.n=0.05-0.03i. The thickness of film is about 18 to 46 nm. The second transparent dielectric film has a refractive index of 2.0.+-.0.2 and a film thickness of 80 to 108 nm.

    摘要翻译： 磁光存储元件具有从第一次接收来自光源的一侧的顺序的多层结构，该光源包括第一透明电介质膜，稀土过渡金属合金膜，第二透明电介质膜和反射 电影。 磁光装置使用磁性体的圆二色性来读取信息。 稀土过渡金属合金膜的折射率为n +/- DELTA n，n = 3.2-3.55i，DELTA n = 0.05-0.03i。 膜的厚度为约18至46nm。 第二透明电介质膜的折射率为2.0 +/- 0.2，膜厚为80〜108nm。

    Magneto-optic memory device
    2.
    发明授权
    Magneto-optic memory device 失效
    磁光存储器件

    公开(公告)号：US5305254A

    公开(公告)日：1994-04-19

    申请号：US993517

    申请日：1992-12-17

    申请人： Yoshiteru Murakami ,  Junichiro Nakayama ,  Ichiro Hiramatsu ,  Akira Takahashi ,  Kenji Ohta ,  Kazuo Van ,  Hiroyuki Katayama

    发明人： Yoshiteru Murakami ,  Junichiro Nakayama ,  Ichiro Hiramatsu ,  Akira Takahashi ,  Kenji Ohta ,  Kazuo Van ,  Hiroyuki Katayama

    IPC分类号： G11B5/64 ,  G11B11/105 ,  G11C13/04

    CPC分类号： G11B5/64 ,  G11B11/10582

    摘要： A magneto-optic memory device, such as a magneto-optic disk or magneto-optic card having a pair of opposed substrates at least one of which is transparent. Between the substrates is a magneto-optic memory layer made of a stack of dielectric film, a rear earth-transition metal alloy thin film, a dielectric film and a light reflecting film built on the surface of the transparent substrate opposed to the other substrate. An adhesive layer covers the memory layer and bonds the transparent substrate to the other substrate. Lastly, a metal nitride film interposed between the light reflecting film of the memory layer and the adhesive layer.

    摘要翻译： 磁光存储器件，例如磁光盘或磁光卡，其具有一对相对的衬底，其中至少一个是透明的。 在基板之间是由与介质膜叠层构成的磁光存储层，后置接地 - 过渡金属合金薄膜，电介质膜和反射膜构成在与其他基板相对的透明基板的表面上。 粘合剂层覆盖存储层并将透明基底粘合到另一个基底上。 最后，介于存储层的光反射膜和粘合剂层之间的金属氮化物膜。

    Magneto-optical recording medium
    3.
    发明授权
    Magneto-optical recording medium 失效
    磁光记录介质

    公开(公告)号：US5662988A

    公开(公告)日：1997-09-02

    申请号：US387294

    申请日：1995-02-10

    申请人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Yoshiteru Murakami

    发明人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Yoshiteru Murakami

    IPC分类号： G11B11/105 ,  G11B11/10 ,  G11B13/04

    CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10515 ,  Y10S428/90 ,  Y10S430/146 ,  Y10T428/12632 ,  Y10T428/12861 ,  Y10T428/12986 ,  Y10T428/24942 ,  Y10T428/31678

    摘要： The magneto-optical recording medium is provided with a readout layer which shows the in-plane magnetization and which changes from the in-plane magnetization to the vertical magnetization when its temperature rises higher than a predetermined temperature by irradiation of the light beam, a memory layer which records information thereon magneto-optically, an intermediate layer which keeps in-plane magnetization from room temperatures to its Curie temperature, and an writing layer which has a Curie temperature higher than that of the memory layer and has coercive force lower than that of the memory layer. Since the intermediate layer becomes a domain wall in optical modulation recording, it prevents the memory layer and the writing layer from forming a domain wall, so information can be recorded in good condition. Moreover, a portion of the readout layer besides a center portion of the light beam shows the in-plane magnetization and masks the memory layer at playback. Therefore, a recording bit can be made small and recording density can be improved without increasing interference of signals from neighboring recording bits, which causes noises.

    摘要翻译： 磁光记录介质设置有读出层，该读出层显示平面内的磁化强度，并且当读出层的温度通过照射光束而升高到高于预定温度时，其从平面内磁化强度变化到垂直磁化强度;存储器 在磁光上记录信息的层，将室内的平面磁化保持到其居里温度的中间层，以及具有比存储层的居里温度高的居里温度并具有低于存储层的矫顽力的矫顽力的写层 内存层。 由于中间层成为光调制记录中的畴壁，因此防止存储层和写入层形成畴壁，因此可以将信息记录在良好状态。 此外，除了光束的中心部分之外，读出层的一部分表示平面内磁化，并且在重放时掩蔽存储层。 因此，可以使记录位小，并且可以提高记录密度，而不会增加来自相邻记录位的信号的干扰，这导致噪声。

    Magneto-optical disk and method of manufacturing the same
    4.
    发明授权
    Magneto-optical disk and method of manufacturing the same 失效
    磁光盘及其制造方法

    公开(公告)号：US5353278A

    公开(公告)日：1994-10-04

    申请号：US694990

    申请日：1991-05-02

    申请人： Yoshiteru Murakami ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Hirotaka Toki

    发明人： Yoshiteru Murakami ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Hirotaka Toki

    IPC分类号： G11B11/105 ,  G11B23/00 ,  G11B5/54

    CPC分类号： G11B23/0042 ,  G11B11/10582 ,  G11B11/10584

    摘要： A magneto-optical disk comprising a substrate whereon a recording medium is formed, and a depression is formed on the substrate on the inside of the recording medium of the substrate. A center hub is installed on the depression such that the center hub is substantially level with a protective resin layer covering the recording medium. On the center hub, a flying head performs CSS (Contact Start and Stop). This configuration of the disk eliminates the occurrence of dust due to the abrasion and head crash, and achieves stable CSS. A method of manufacturing the magneto-optical disk, wherein the protective resin layer is formed after installing the center hub on the depression. In this method, since a space is not produced between the center hub and the protective resin layer, the stable flying characteristics is obtained. And a magneto-optical disk whereon small physical bumps and pits are formed on the substrate on the inside of the recording medium, which prevents the flying head from sticking to the disk. A method of manufacturing the magneto-optical disk by using a stamper, which permits the disk to be mass produced.

    摘要翻译： 一种磁光盘，包括形成记录介质的基板，并且在基板的记录介质的内侧上的基板上形成凹陷。 中心毂安装在凹陷处，使得中心毂基本上与覆盖记录介质的保护树脂层水平。 在中心枢纽上，飞头执行CSS（联系人启动和停止）。 盘的这种配置消除了由于磨损和头部碰撞引起的灰尘的发生，并且实现了稳定的CSS。 一种制造磁光盘的方法，其中在将中心毂安装在凹陷部之后形成保护树脂层。 在该方法中，由于在中心轮毂和保护树脂层之间不产生空间，因此获得了稳定的飞行特性。 另外，在记录介质的内侧的基板上形成小的物理凸点和凹坑的磁光盘，防止飞头粘附到盘上。 通过使用压模来制造磁光盘的方法，该压模允许大量生产盘。

    Substrate with protective film and method of manufacturing optical memory device using the same
    6.
    发明授权
    Substrate with protective film and method of manufacturing optical memory device using the same 失效
    具有保护膜的基板和使用其制造光学存储器件的方法

    公开(公告)号：US5002813A

    公开(公告)日：1991-03-26

    申请号：US384254

    申请日：1989-07-21

    申请人： Junichiro Nakayama ,  Kenji Ohta ,  Hiroyuki Katayama ,  Akira Takahashi ,  Yoshiteru Murakami

    发明人： Junichiro Nakayama ,  Kenji Ohta ,  Hiroyuki Katayama ,  Akira Takahashi ,  Yoshiteru Murakami

    IPC分类号： B42D15/10 ,  G06K19/06 ,  G11B7/24 ,  G11B7/26

    CPC分类号： G11B7/26 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T156/10 ,  Y10T428/239 ,  Y10T428/31507

    摘要： A substrate for manufacturing an optical memory device includes one surface covered with a protective film provided with openings only in portions corresponding to recording layers to be formed on the substrate, thereby allowing the protective film to function as a mask for forming the recording layers in a recording layer forming process. Also disclosed is a method of manufacturing an optical memory device including the steps of continuously feeding a substrate covered with a protective film provided with openings only in portions corresponding to recording layers to be formed on the substrate, forming the recording layers through the openings on the substrate, forming guide tracks on the substrate, stripping the protective film from the substrate, cutting the substrate to a predetermined size, and forming a protective layer on the substrate.

    摘要翻译： 用于制造光学存储器件的衬底包括一个被保护膜覆盖的表面，该保护膜仅在对应于要形成在衬底上的记录层的部分中具有开口，从而允许保护膜用作掩模，用于形成记录层 记录层形成过程。 还公开了一种制造光学存储器件的方法，包括以下步骤：将覆盖有保护膜的衬底连续地供给到仅在对应于要形成在衬底上的记录层的部分上的开口，通过上述开口形成记录层 基板，在基板上形成引导轨道，从基板剥离保护膜，将基板切割成预定尺寸，以及在基板上形成保护层。

    Magneto-optical recording medium
    7.
    发明授权
    Magneto-optical recording medium 失效
    磁光记录介质

    公开(公告)号：US5707727A

    公开(公告)日：1998-01-13

    申请号：US395165

    申请日：1995-02-27

    申请人： Akira Takahashi ,  Yoshiteru Murakami ,  Junsaku Nakajima ,  Kenji Ohta ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Michinobu Mieda

    发明人： Akira Takahashi ,  Yoshiteru Murakami ,  Junsaku Nakajima ,  Kenji Ohta ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Michinobu Mieda

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66 ,  B32B5/16 ,  G11B5/02 ,  G11B11/00

    CPC分类号： G11B11/10593 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10517 ,  G11B11/10586 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magneto-optical recording medium has a recording layer whereon information is magneto-optically recorded. A readout layer is provided on the recording layer. The readout layer has a compensating temperature that is located between room temperature and the Curie temperature. In the readout layer, upon an application of a light beam, the in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to vertical magnetization occurs as the temperature of the irradiated area of the readout layer rises above a predetermined temperature. By employing this magneto-optical recording medium, with an application of a light beam that is intensity modulated into two levels, only a spot having a temperature not less than a predetermined temperature is involved in the reproduction; therefore, a recorded bit with a size smaller than the diameter of the light beam can be reproduced, thereby greatly increasing the recording density. Further, the level of the reproduced signals is increased, and crosstalk from the adjoining tracks is reduced; thus, information recording and overwriting can be conducted more easily.

    摘要翻译： 磁光记录介质具有磁信息记录信息的记录层。 读出层设置在记录层上。 读出层具有位于室温和居里温度之间的补偿温度。 在读出层中，在施加光束时，在室温下发生平面内磁化，并且随着读出层的照射区域的温度上升到预定值以上，从面内磁化向垂直磁化的转变发生 温度。 通过采用该磁光记录介质，通过施加强度调制为两个级别的光束，只有具有不低于预定温度的温度的点参与再现; 因此，可以再现具有小于光束直径的尺寸的记录位，从而大大提高记录密度。 此外，再现信号的电平增加，并且来自相邻轨道的串扰减小; 因此，可以更容易地进行信息记录和重写。