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    Perpendicular recording medium having recording layer with controlled properties and method of manufacturing the perpendicular recording medium
    1.
    发明申请
    Perpendicular recording medium having recording layer with controlled properties and method of manufacturing the perpendicular recording medium 审中-公开
    具有受控特性的记录层的垂直记录介质和垂直记录介质的制造方法

    公开(公告)号：US20070020487A1

    公开(公告)日：2007-01-25

    申请号：US11484692

    申请日：2006-07-12

    申请人： Chee-kheng Lim ,  No-yeol Park ,  Yong-su Kim ,  Hoon-sang Oh

    发明人： Chee-kheng Lim ,  No-yeol Park ,  Yong-su Kim ,  Hoon-sang Oh

    IPC分类号： G11B5/65 ,  B05D5/12

    CPC分类号： G11B5/66 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7379

    摘要： Provided is a perpendicular magnetic recording medium. The perpendicular magnetic recording medium includes: a lower structure; and a recording layer formed on the lower structure, wherein the recording layer has a balancing force 2πMr2/K1 of 0.5 or less and a factor 4πMr/Hc of 0.8 or less where Mr denotes a remnant magnetization, K1 denotes a perpendicular magnetic anisotropy energy constant, and Hc denotes a coercive force. Accordingly, even though grain boundaries between grains that constitute the recording layer are somewhat non-uniform in width, the grains can have almost the same nucleation field. As a result, the perpendicular magnetic recording medium can ensure high recording density and stability of recorded information.

    摘要翻译： 提供了一种垂直磁记录介质。 垂直磁记录介质包括：下结构; 以及形成在下部结构上的记录层，其中记录层具有0.5或更小的平衡力2piMr 2 / K 1和0.8或更小的因子4piMr / Hc，其中Mr表示残余磁化强度 ，K 1表示垂直磁各向异性能常数，Hc表示矫顽力。 因此，即使构成记录层的晶粒之间的晶界在宽度上有些不均匀，晶粒也可以具有几乎相同的成核场。 结果，垂直磁记录介质可以确保记录信息的高记录密度和稳定性。

    Perpendicular magnetic recording media with laminated soft magnetic underlayer
    2.
    发明授权
    Perpendicular magnetic recording media with laminated soft magnetic underlayer 失效
    垂直磁记录介质，层叠软磁底层

    公开(公告)号：US07601443B2

    公开(公告)日：2009-10-13

    申请号：US11259085

    申请日：2005-10-27

    申请人： Chee-kheng Lim ,  Yong-su Kim ,  Byung-kyu Lee ,  Hoon-sang Oh ,  Tae-hyo Lee

    发明人： Chee-kheng Lim ,  Yong-su Kim ,  Byung-kyu Lee ,  Hoon-sang Oh ,  Tae-hyo Lee

    IPC分类号： G11B5/66 ,  G11B5/667 ,  G11B5/673

    CPC分类号： G11B5/66 ,  G11B5/653 ,  G11B5/656 ,  G11B5/667

    摘要： A recording medium including a perpendicular magnetic recording layer and a laminated SUL formed on a substrate is provided. The SUL includes an antiferromagnetic layer interposed between laminated structures including a magnetic layer, a non-magnetic layer and a magnetic layer. The layers may each have a thickness of 20 nm or less and the layers below the antiferromagnetic layer may be thinner than the layers on the antiferromagnetic layer. The laminated structures formed on and below the antiferromagnetic layer have unidirectional magnetic anisotropies set in the opposite radial direction to each other by an exchange bias. As a result, media magnetic domain noise can be diminished.

    摘要翻译： 提供了包括在基板上形成的垂直磁记录层和层叠SUL的记录介质。 SUL包括介于包括磁性层，非磁性层和磁性层的层压结构之间的反铁磁性层。 这些层可以各自具有20nm或更小的厚度，并且反铁磁层下面​​的层可以比反铁磁性层上的层更薄。 形成在反铁磁性层上和下方的叠层结构具有通过交换偏压彼此相反的径向方向设置的单向磁各向异性。 结果，媒体磁畴噪声可以减弱。

    Perpendicular magnetic recording media with soft magnetic underlayer
    4.
    发明授权
    Perpendicular magnetic recording media with soft magnetic underlayer 有权
    具有软磁底层的垂直磁记录介质

    公开(公告)号：US07799445B2

    公开(公告)日：2010-09-21

    申请号：US11477624

    申请日：2006-06-30

    申请人： Hoon-sang Oh ,  Yong-su Kim ,  No-yeol Park ,  Hoo-san Lee ,  Chul-min Choi

    发明人： Hoon-sang Oh ,  Yong-su Kim ,  No-yeol Park ,  Hoo-san Lee ,  Chul-min Choi

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667

    摘要： A perpendicular magnetic recording medium including a soft magnetic underlayer. The perpendicular magnetic recording medium includes: a lower structural body including an anti-ferromagnetic layer; a first soft magnetic underlayer, a non-magnetic layer, and a second soft magnetic underlayer sequentially formed on the anti-ferromagnetic layer, where the thickness ratio of the second soft magnetic underlayer to that of the first soft magnetic underlayer is designed to be within specific range; and a recording layer formed on the second soft magnetic underlayer. Therefore, noise generated on the soft magnetic underlayer due to external magnetic fields of a magnetic head and a voice coil motor can be reduced greatly.

    摘要翻译： 包括软磁性底层的垂直磁记录介质。 垂直磁记录介质包括：包括反铁磁层的下结构体; 顺序地形成在反铁磁层上的第一软磁性底层，非磁性层和第二软磁性底层，其中第二软磁性底层与第一软磁性底层的厚度比被设计为在 具体范围 以及形成在第二软磁性底层上的记录层。 因此，可以大大降低由于磁头和音圈电机的外部磁场而在软磁性底层上产生的噪声。

    Perpendicular magnetic recording media with soft magnetic underlayer
    5.
    发明申请
    Perpendicular magnetic recording media with soft magnetic underlayer 有权
    具有软磁底层的垂直磁记录介质

    公开(公告)号：US20070003795A1

    公开(公告)日：2007-01-04

    申请号：US11477624

    申请日：2006-06-30

    申请人： Hoon-sang Oh ,  Yong-su Kim ,  No-yeol Park ,  Hoo-san Lee ,  Chul-min Choi

    发明人： Hoon-sang Oh ,  Yong-su Kim ,  No-yeol Park ,  Hoo-san Lee ,  Chul-min Choi

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667

    摘要： A perpendicular magnetic recording medium including a soft magnetic underlayer. The perpendicular magnetic recording medium includes: a lower structural body including an anti-ferromagnetic layer; a first soft magnetic underlayer, a non-magnetic layer, and a second soft magnetic underlayer sequentially formed on the anti-ferromagnetic layer, where the thickness ratio of the second soft magnetic underlayer to that of the first soft magnetic underlayer is designed to be within specific range; and a recording layer formed on the second soft magnetic underlayer. Therefore, noise generated on the soft magnetic underlayer due to external magnetic fields of a magnetic head and a voice coil motor can be reduced greatly.

    摘要翻译： 包括软磁性底层的垂直磁记录介质。 垂直磁记录介质包括：包括反铁磁层的下结构体; 顺序地形成在反铁磁层上的第一软磁性底层，非磁性层和第二软磁性底层，其中第二软磁性底层与第一软磁性底层的厚度比设计为在 具体范围 以及形成在第二软磁性底层上的记录层。 因此，可以大大降低由于磁头和音圈电机的外部磁场而在软磁性底层上产生的噪声。

    Magnetic recording medium
    8.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US08007931B2

    公开(公告)日：2011-08-30

    申请号：US11698081

    申请日：2007-01-26

    申请人： Hoo-san Lee ,  Chee-kheng Lim ,  Hoon-sang Oh ,  Sok-hyun Kong

    发明人： Hoo-san Lee ,  Chee-kheng Lim ,  Hoon-sang Oh ,  Sok-hyun Kong

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667 ,  Y10T428/24942

    摘要： A perpendicular magnetic recording medium including: a substrate; a perpendicular magnetic recording layer disposed over the substrate; a soft magnetic underlayer disposed between the substrate and the perpendicular magnetic recording layer; a shunting layer disposed under the soft magnetic underlayer; and an isolation layer disposed between the soft magnetic underlayer and the shunting layer and providing magnetic isolation between the shunting layer and the other layers disposed over the shunting layer are provided. The shunting layer is magnetically separated from the other magnetic layers disposed over the shunting layer, and shunts a magnetic field generated by the magnetic domain walls of the soft magnetic underlayer such that the magnetic field cannot reach a magnetic head, thereby increasing a signal-to-noise ratio (SNR).

    摘要翻译： 一种垂直磁记录介质，包括：基板; 设置在所述基板上的垂直磁记录层; 设置在基板和垂直磁记录层之间的软磁性底层; 配置在软磁性底层下方的分路层; 并且设置在软磁性底层和分流层之间并且在分流层和设置在分流层之上的其它层之间提供磁隔离的隔离层。 分流层与设置在分流层上的其他磁性层磁分离，并且分流由软磁性底层的磁畴壁产生的磁场，使得磁场不能到达磁头，从而增加信号到 - 噪声比（SNR）。

    Information storage devices using magnetic domain wall movement and methods of operating the same
    9.
    发明授权
    Information storage devices using magnetic domain wall movement and methods of operating the same 有权
    信息存储设备采用磁畴壁运动和操作方式相同

    公开(公告)号：US07869264B2

    公开(公告)日：2011-01-11

    申请号：US11980627

    申请日：2007-10-31

    申请人： Hoo-san Lee ,  Chee-kheng Lim ,  Hoon-sang Oh

    发明人： Hoo-san Lee ,  Chee-kheng Lim ,  Hoon-sang Oh

    IPC分类号： G11C11/00

    CPC分类号： G11C11/14 ,  G11C19/0808 ,  Y10T428/11

    摘要： An information storage device includes a record head and a data recording medium. The record head includes a magnetic substance having magnetic domain walls and records data in the data recording medium. In a method of operating the information storage device, a first high frequency current or a high frequency magnetic field is supplied to the magnetic substance while magnetic domain walls of the magnetic substance are moved.

    摘要翻译： 信息存储装置包括记录头和数据记录介质。 记录头包括具有磁畴壁的磁性物质，并将数据记录在数据记录介质中。 在操作信息存储装置的方法中，在磁性物质的磁畴壁移动的同时向磁性物质提供第一高频电流或高频磁场。

    Magnetic recording medium
    10.
    发明申请
    Magnetic recording medium 审中-公开
    磁记录介质

    公开(公告)号：US20070230053A1

    公开(公告)日：2007-10-04

    申请号：US11655217

    申请日：2007-01-19

    申请人： Sok-hyun Kong ,  Chee-kheng Lim ,  Hoon-sang Oh ,  Hoo-san Lee ,  Seong-yong Yoon

    发明人： Sok-hyun Kong ,  Chee-kheng Lim ,  Hoon-sang Oh ,  Hoo-san Lee ,  Seong-yong Yoon

    IPC分类号： G11B5/74

    CPC分类号： G11B5/667

    摘要： A magnetic recording medium is provided. The magnetic recording medium includes: a substrate; a perpendicular magnetic recording layer which is formed over the substrate; a first soft magnetic underlayer which is disposed between the perpendicular magnetic recording layer and the substrate; a second soft magnetic underlayer which is disposed between the first soft magnetic underlayer and the perpendicular magnetic recording layer; and an isolation layer which is disposed between the first soft magnetic underlayer and the second magnetic layer and which prevents magnetic interaction between the first soft magnetic underlayer and the second soft magnetic underlayer, wherein anisotropy field Hk of the second soft magnetic underlayer is greater than anisotropy field Hk of the first soft magnetic underlayer.

    摘要翻译： 提供磁记录介质。 磁记录介质包括：基板; 垂直磁记录层，形成在衬底上; 设置在垂直磁记录层和基板之间的第一软磁性底层; 第二软磁性底层，其设置在第一软磁性底层和垂直磁记录层之间; 以及隔离层，其设置在所述第一软磁性底层和所述第二磁性层之间，并且防止所述第一软磁性底层和所述第二软磁性底层之间的磁性相互作用，其中所述第一软磁性底层和所述第二软磁性底层的各向异性场H 第二软磁性底层比第一软磁性底层的各向异性场H k大。