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59 条记录 (耗时 0.027 秒)

    Method of magneto-optically recording/erasing information and magneto-optical information storage medium including recording and bias layers satisfying certain conditions
    13.
    发明授权
    Method of magneto-optically recording/erasing information and magneto-optical information storage medium including recording and bias layers satisfying certain conditions 失效
    磁光记录/擦除信息和磁光信息存储介质的方法，包括记录和偏移层满足某些条件

    公开(公告)号：US5175714A

    公开(公告)日：1992-12-29

    申请号：US413485

    申请日：1989-09-27

    申请人： Akira Kikitsu ,  Katsutarou Ichihara ,  Sumio Ashida

    发明人： Akira Kikitsu ,  Katsutarou Ichihara ,  Sumio Ashida

    IPC分类号： G11B11/105

    CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10521

    摘要： A magneto-optical recording medium including a recording layer and a bias layer being stacked one upon the other to apply coupling interaction which is mainly magnetostatic interaction to each other, the bias layer having a magnetization-reversing temperature higher than that of the recording layer. The medium is irradiated with laser beam pulses having a recording level and an erasing level lower than the recording level, thereby recording and erasing the information. When the medium is irradiated with the laser beam pulse having the recording level and the irradiated region is cooled to the magnetization reversing temperature T.sub.rR, the magnetization of the beam-irradiated region of the recording layer is aligned with a direction of the leakage magnetic field leaking from the recording layer. When the medium is irradiated with the laser beam pulse having the erase level and the irradiated region is cooled to T.sub.rR, direction of magnetization of the beam-irradiated region of the recording layer is aligned with a direction of the leakage magnetic field applied from the bias layer to the recording layer.

    A magneto-optical recording system including a recording medium having a reversal preventive layer for preventing a magnetization reversal of a bias layer which is magnetostatically coupled to a recording layer
    17.
    发明授权
    A magneto-optical recording system including a recording medium having a reversal preventive layer for preventing a magnetization reversal of a bias layer which is magnetostatically coupled to a recording layer 失效
    一种磁光记录系统，包括具有防反射层的记录介质，用于防止静磁耦合到记录层的偏置层的磁化反转

    公开(公告)号：US5412627A

    公开(公告)日：1995-05-02

    申请号：US61538

    申请日：1993-05-14

    申请人： Katsutaro Ichihara ,  Sumio Ashida ,  Akira Kikitsu ,  Yumi Mizusawa

    发明人： Katsutaro Ichihara ,  Sumio Ashida ,  Akira Kikitsu ,  Yumi Mizusawa

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

    CPC分类号： G11B11/10521 ,  G11B11/10586

    摘要： Light beams having two different power levels are radiated on a magneto-optical medium having a recording layer and a bias layer magnetostatically coupled to the recording layer, thereby recording and erasing information. Upon radiation of a high level beam, a beam irradiated portion of the recording layer is heated to reach a magnetization reversal temperature, and the direction of magnetization of the irradiated portion follows a direction of a leakage field generated by a magnetization distribution formed by heating of the bias layer. Upon radiation of a low level beam, a beam irradiated portion of the recording layer is heated to reach a magnetization reversal temperature to cause the bias layer to generate a leakage field having a magnitude smaller than that upon radiation of the high level beam. In this case, the direction of magnetization of the recording layer is opposite to that of the leakage field obtained upon radiation of the high level beam. The directions of magnetization of the bias layer are kept unchanged before and after the radiation of the high level beam and before and after the radiation of the low level beam.

    摘要翻译： 具有两个不同功率电平的光束被辐射在具有静磁耦合到记录层的记录层和偏置层的磁光介质上，从而记录和擦除信息。 在高电平光束的辐射下，记录层的光束照射部分被加热以达到磁化反转温度，并且照射部分的磁化方向遵循由通过加热形成的磁化分布产生的泄漏场的方向 偏置层。 在低电平光束的辐射下，记录层的光束照射部分被加热以达到磁化反转温度，以使偏置层产生的幅度小于高电平光束辐射时的泄漏场。 在这种情况下，记录层的磁化方向与在高电平光束的辐射时获得的泄漏场的方向相反。 在高电平光束的辐射之前和之后以及在低电平光束的辐射之前和之后，偏置层的磁化方向保持不变。

    Method of magneto-optically recording and erasing information onto a magneto-optical information storage medium
    18.
    发明授权
    Method of magneto-optically recording and erasing information onto a magneto-optical information storage medium 失效
    磁光记录方法和磁信息存储介质的擦除信息

    公开(公告)号：US5105400A

    公开(公告)日：1992-04-14

    申请号：US370764

    申请日：1989-06-23

    申请人： Akira Kikitsu ,  Katsutarou Ichihara ,  Sumio Ashida

    发明人： Akira Kikitsu ,  Katsutarou Ichihara ,  Sumio Ashida

    IPC分类号： G11B11/10 ,  G11B11/105

    CPC分类号： G11B11/10521 ,  G11B11/10586

    摘要： A method of magneto-optically recording and erasing information which comprises irradiating pulse-like laser beam onto a magneto-optical information storage medium including recording and bias layers which has perpendicular magnetic anisotropy and which are stacked one upon the other to apply coupling interaction which is mainly magnetostatic interaction to each other, and magnetization-reversing temperature of the bias layer being higher than that of the recording layer. When the recording laser beam is irradiated onto the medium, the beam-irradiated portion of the medium is heated to form a reversed magnetic domain in the bias layer, magnetization of the recording layer is reversed by first leakage magnetic field applied to the recording layer when beam-irradiated portion is then cooled, and magnetization of the bias layer is directed in same direction as that under initial state by second leakage magnetic field, applied to the bias layer. When the erasing layer beam is irradiated onto the medium, the beam-irradiated portion of the medium is heated to the magnetization-reversing temperature of the recording layer, and due to third leakage magnetic field applied to the recording layer at this time, the direction of magnetization of the recording layer is re-reversed.

    Optical disk and optical disk device
    20.
    发明申请
    Optical disk and optical disk device 审中-公开
    光盘和光盘设备

    公开(公告)号：US20070230321A1

    公开(公告)日：2007-10-04

    申请号：US11713935

    申请日：2007-03-05

    申请人： Noritake Oomachi ,  Tsukasa Nakai ,  Naomasa Nakamura ,  Keiichiro Yusu ,  Sumio Ashida

    发明人： Noritake Oomachi ,  Tsukasa Nakai ,  Naomasa Nakamura ,  Keiichiro Yusu ,  Sumio Ashida

    IPC分类号： G11B7/24

    CPC分类号： G11B7/24038 ,  G11B7/0053 ,  G11B7/24079 ,  G11B7/243 ,  G11B7/256

    摘要： According to one embodiment, there is provided an optical disk including a substrate layer having a refractive index of 1.50 to 1.70 and a thickness X (μm) equal to or greater than f (n)−13 μm, a first information layer formed on the substrate layer, an adhesive layer formed on the first information layer and having a thickness Y (μm) equal to or greater than 20 μm, and a second information layer formed on the adhesive layer, wherein X+Y≦f (n)+30 μm and f(n)

    摘要翻译： 根据一个实施例，提供了一种光盘，其包括折射率为1.50至1.70的基底层和等于或大于f（n）-13μm的厚度X（mum），形成在第一信息层上的第一信息层 衬底层，形成在第一信息层上并具有等于或大于20μm的厚度Y（mum）的粘合剂层和形成在粘合剂层上的第二信息层，其中X + Y <= f（n）+ 30 mum，f（n） （n≥2+ A 2）/（n≥2-1）（n≥2+ A < 3）x1000（mum），其中“n”是基底层的折射率，A 1