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136 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
    2.
    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
    5.
    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
    6.
    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.

    Method and apparatus for manufacturing magnetic recording media
    9.
    发明授权
    Method and apparatus for manufacturing magnetic recording media 失效
    制造磁记录介质的方法和装置

    公开(公告)号：US08221637B2

    公开(公告)日：2012-07-17

    申请号：US12829450

    申请日：2010-07-02

    申请人： Yoshiyuki Kamata ,  Katsuyuki Naito ,  Akira Kikitsu ,  Masatoshi Sakurai ,  Masahiro Oka

    发明人： Yoshiyuki Kamata ,  Katsuyuki Naito ,  Akira Kikitsu ,  Masatoshi Sakurai ,  Masahiro Oka

    IPC分类号： C23C14/46

    CPC分类号： C23F4/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  H01J2237/30466 ,  H01J2237/3174

    摘要： According to one embodiment, a method for manufacturing a magnetic recording medium includes forming patterns having protrusions and recesses of a ferromagnetic material onto a recording track section and a servo section on a substrate, forming a flattening film, a top surface of which is higher than that of the protrusion of the ferromagnetic material, onto the ferromagnetic material, and performing ion beam etching onto the flattening film up to a top surface of the protrusion of the ferromagnetic material, and determining an end point of flattening etching on the basis of a change in the total number of incident particles by means of an ion counter installed so as to be at an angle θ with respect to a perpendicular direction to the substrate in accordance with a material of the flattening film.

    摘要翻译： 根据一个实施例，一种制造磁记录介质的方法包括将具有铁磁材料的突起和凹陷的图案形成在记录轨道部分和基板上的伺服部分上，形成平坦化膜，其顶表面高于 将铁磁材料的突出部分突出到铁磁材料上，并且对平坦化膜进行离子束蚀刻直到铁磁材料的突起的顶表面，并且基于变化确定平坦化蚀刻的终点 在通过以与角度为角度安装的离子计数器的入射颗粒的总数中; 相对于基板的垂直方向，根据平坦化膜的材料。

    Magnetic recording medium having a secondary recording layer made of a material having a negative crystal magnetic anisotropy and magnetic recording and reproducing apparatus
    10.
    发明授权
    Magnetic recording medium having a secondary recording layer made of a material having a negative crystal magnetic anisotropy and magnetic recording and reproducing apparatus 有权
    具有由具有负晶体磁各向异性的材料制成的辅助记录层和磁记录和再现装置的磁记录介质

    公开(公告)号：US08116035B2

    公开(公告)日：2012-02-14

    申请号：US11917088

    申请日：2006-06-09

    申请人： Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

    发明人： Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

    IPC分类号： G11B5/74 ,  G11B5/66

    CPC分类号： H01F10/3227 ,  G11B5/65 ,  G11B5/66 ,  G11B5/855 ,  H01F10/007 ,  H01F10/16 ,  H01F10/3286

    摘要： The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 11, an under layer 12 formed on the substrate 11, a magnetic recording layer 13 formed on the under layer 12, and a protective layer 14 formed on the magnetic recording layer 13. The magnetic recording layer 13 is composed of a primary recording layer 14 and a secondary recording layer 15 which are mutually exchange-coupled. The primary recording layer 14 has magnetic grains and a nonmagnetic material that surrounds the magnetic grains, and has a perpendicular magnetic anisotropy. The secondary recording layer 15 is made of a material having a negative crystal magnetic anisotropy and its easy plane of the magnetization is a plane of the medium.

    摘要翻译： 本发明提供一种磁记录介质和磁记录和重放装置。 磁记录介质包括基板11，形成在基板11上的底层12，形成在下层12上的磁记录层13和形成在磁记录层13上的保护层14。磁记录层13 由相互交换耦合的主记录层14和辅助记录层15组成。 主记录层14具有磁性粒子和围绕磁性粒子的非磁性材料，并且具有垂直的磁各向异性。 辅助记录层15由具有负晶体磁各向异性的材料制成，其易磁化平面是介质的平面。