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    METHOD OF INCREASING RECORDING DENSITY OF HARD DISC DRIVE AND CONTROLLING DEVICE THEREOF
    11.
    发明申请
    METHOD OF INCREASING RECORDING DENSITY OF HARD DISC DRIVE AND CONTROLLING DEVICE THEREOF 有权
    增加硬盘驱动器的记录密度和控制装置的方法

    公开(公告)号：US20090009903A1

    公开(公告)日：2009-01-08

    申请号：US11946074

    申请日：2007-11-28

    Applicant: Hoo-san LEE ,  Hyun-jei KIM ,  Sung-hoon CHOA ,  Hoon-sang OH

    Inventor： Hoo-san LEE ,  Hyun-jei KIM ,  Sung-hoon CHOA ,  Hoon-sang OH

    IPC: G11B21/02

    CPC classification number: G11B5/02 ,  G11B2005/001

    Abstract: Provided is a method of increasing recording density and a control apparatus for increasing the recording density. The method includes applying a recording current corresponding to a recording signal to a magnetic head of a hard disc drive (HDD), and limiting a current value being applied to the magnetic head to a critical value when the recording current reaches the critical value. In the method, a rising time is reduced by using an overshoot recording current and the recording current is limited to a critical value when an actual recording current reaches the critical value. Thus, write track widths (WTWs) can be reduced at a low recording frequency, thereby increasing tracks per inch (TPI).

    Abstract translation: 提供了增加记录密度的方法和用于提高记录密度的控制装置。 该方法包括将对应于记录信号的记录电流施加到硬盘驱动器（HDD）的磁头，并且当记录电流达到临界值时将施加到磁头的电流值限制为临界值。 在该方法中，通过使用过冲记录电流来降低上升时间，并且当实际记录电流达到临界值时，记录电流被限制在临界值。 因此，可以在低记录频率下减小写轨道宽度（WTW），从而增加每英寸轨迹（TPI）。

    Information storage devices using magnetic domain wall movement and methods of operating the same
    13.
    发明申请
    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：US20080158707A1

    公开(公告)日：2008-07-03

    申请号：US11980627

    申请日：2007-10-31

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

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

    IPC: G11B5/02

    CPC classification number: G11C11/14 ,  G11C19/0808 ,  Y10T428/11

    Abstract: 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.

    Abstract translation: 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
    14.
    发明申请
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US20070212575A1

    公开(公告)日：2007-09-13

    申请号：US11698081

    申请日：2007-01-26

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

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

    IPC: G11B5/66

    CPC classification number: G11B5/667 ,  Y10T428/24942

    Abstract: 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).

    Abstract translation: 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）。

    Magnetic recording head and method of manufacturing the same
    15.
    发明申请
    Magnetic recording head and method of manufacturing the same 审中-公开
    磁记录头及其制造方法

    公开(公告)号：US20060215318A1

    公开(公告)日：2006-09-28

    申请号：US11387928

    申请日：2006-03-24

    Applicant: Hoo-san Lee ,  Yong-su Kim

    Inventor： Hoo-san Lee ,  Yong-su Kim

    IPC: G11B5/147

    CPC classification number: G11B5/1278 ,  G11B5/3163

    Abstract: A magnetic recording head and a method of manufacturing the same are provided. The magnetic recording head has a stacked structure including a main pole and a return pole. The stacked structure includes a first insulation layer having a stepped portion on one surface, a first magnetic portion having a shape of a vertical thin film that contacts a riser of the stepped portion, and a second magnetic layer disposed to be insulated from the first magnetic portion. The method of manufacturing the magnetic recording head includes forming the first insulation layer having a stepped portion on one surface, forming a magnetic thin film on the first insulation layer along the stepped portion, and forming the main pole by etching the magnetic thin film during a predetermined period of time until only a vertical thin film portion of the magnetic thin film that contacts a riser of the stepped portion remains.

    Abstract translation: 提供磁记录头及其制造方法。 磁记录头具有包括主极和返回极的堆叠结构。 层叠结构包括：在一个表面上具有阶梯部分的第一绝缘层，具有与台阶部分的提升管接触的垂直薄膜形状的第一磁性部分和与第一磁性体绝缘的第二磁性层 一部分。 制造磁记录头的方法包括在一个表面上形成具有阶梯部分的第一绝缘层，沿着阶梯部分在第一绝缘层上形成磁性薄膜，并且在一段时间内通过蚀刻磁性薄膜形成主极 直到只剩下与阶梯部分的提升管接触的磁性薄膜的垂直薄膜部分为止。

    Magnetic recording head
    16.
    发明申请
    Magnetic recording head 失效
    磁记录头

    公开(公告)号：US20060103977A1

    公开(公告)日：2006-05-18

    申请号：US11196412

    申请日：2005-08-04

    Applicant: Hoo-san Lee ,  Young-hun Im ,  Yong-su Kim

    Inventor： Hoo-san Lee ,  Young-hun Im ,  Yong-su Kim

    IPC: G11B5/147

    CPC classification number: G11B5/147

    Abstract: A magnetic recording head includes a return pole, a writing pole spaced a predetermined distance from the return pole, an induction writing coil forming a magnetic field on the writing pole, and a writing pole shield formed on the same plane as the writing pole.

    Abstract translation: 磁记录头包括一个返回极，与返回极间隔预定距离的一个写入极，一个在写入极上形成一个磁场的感应写入线圈，和一个形成在与写入极相同的平面上的写入磁极屏蔽。

    Perpendicular magnetic recording medium
    17.
    发明授权
    Perpendicular magnetic recording medium 有权

    公开(公告)号：US10026429B2

    公开(公告)日：2018-07-17

    申请号：US12722581

    申请日：2010-03-12

    Applicant: Sok-hyun Kong ,  Hoo-san Lee ,  Sadayuki Watanabe ,  Shunji Takenoiri

    Inventor： Sok-hyun Kong ,  Hoo-san Lee ,  Sadayuki Watanabe ,  Shunji Takenoiri

    IPC: G11B5/66

    CPC classification number: G11B5/66

    Abstract: A perpendicular type of magnetic recording medium has a multi-layered recording structure made up of a plurality of ferro-magnetic layers and a non-magnetic layer interposed between the plurality of ferro-magnetic layers, and the perpendicular magnetic anisotropy energy of the lower ferro-magnetic layer is greater than the perpendicular magnetic anisotropy energy of the upper ferro-magnetic layer. Accordingly, the lower ferro-magnetic layer may be easily magnetically reversed by a magnetic field applied during a write operation. Thus, the perpendicular type of magnetic recording medium exhibits an enhanced thermal stability and write-ability.

    Magnetic head having shield and recording apparatus employing the same
    18.
    发明授权
    Magnetic head having shield and recording apparatus employing the same 失效
    具有屏蔽的磁头和采用该磁头的记录装置

    公开(公告)号：US08164852B2

    公开(公告)日：2012-04-24

    申请号：US12142903

    申请日：2008-06-20

    Applicant: Hoo-san Lee ,  Hoon-sang Oh ,  Sung-chul Lee

    Inventor： Hoo-san Lee ,  Hoon-sang Oh ,  Sung-chul Lee

    IPC: G11B5/11 ,  G11B5/147

    CPC classification number: G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/315

    Abstract: A magnetic head and a recording apparatus employing the same are provided. The magnetic head includes a recording member, a field inducing member inducing a magnetic field to the recording member, a shield member having the same direction of magnetization as the recording member in a recording operation, and a return path member forming a magnetic path with the recording member.

    Abstract translation: 提供一种磁头和采用该磁头的记录装置。 磁头包括记录部件，引起磁记录部件的磁场的场诱导部件，在记录动作中具有与记录部件相同的磁化方向的屏蔽部件，以及与该记录部件形成磁路的返回路径部件 录音成员

    Bit patterned medium
    19.
    发明授权
    Bit patterned medium 有权
    位图形介质

    公开(公告)号：US08043733B2

    公开(公告)日：2011-10-25

    申请号：US12039112

    申请日：2008-02-28

    Applicant: Hoo-san Lee ,  Sung-chul Lee ,  Hoon-sang Oh

    Inventor： Hoo-san Lee ,  Sung-chul Lee ,  Hoon-sang Oh

    IPC: G11B5/66

    CPC classification number: G11B5/66 ,  G11B5/855

    Abstract: A bit patterned medium in which an exchange coupling layer induces exchange coupling between adjacent bits in order to reduce a switching field difference resulting from different magnetization directions of bits. The exchange coupling layer is disposed either over or under a recording layer having a plurality of bits. The exchange coupling layer induces exchange coupling between a bit which is to be recorded and an adjacent bit and reduces a switching field difference resulting from a difference between the magnetization direction of the bit to be recorded and the magnetization direction of neighboring bits due to an exchange coupling force generated during the exchange coupling.

    Abstract translation: 一种位图形介质，其中交换耦合层引起相邻位之间的交换耦合，以便减少由不同磁化方向引起的开关场差。 交换耦合层设置在具有多个位的记录层之上或之下。 交换耦合层引起要被记录的位和相邻位之间的交换耦合，并减少由于要记录的位的磁化方向与由于交换而产生的相邻位的磁化方向之间的差导致的开关场差 在交换耦合期间产生的耦合力。

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