公开(公告)号：US07881002B2

公开(公告)日：2011-02-01

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: G11B5/02

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）。

公开(公告)号：US07869264B2

公开(公告)日：2011-01-11

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: G11C11/00

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。

公开(公告)号：US07602584B2

公开(公告)日：2009-10-13

申请号：US11352316

申请日：2006-02-13

Applicant: Hoo-san Lee ,  Yong-su Kim

Inventor： Hoo-san Lee ,  Yong-su Kim

IPC: G11B5/147

CPC classification number: G11B5/3163 ,  G11B5/1278

Abstract: A magnetic recording head and a method of manufacturing the same are provided. The method includes layering sequentially first magnetic layer and an insulating cap layer on a first insulating layer; forming a mask pattern of a desired width on the insulating cap layer, and etching the first magnetic layer and the insulating cap layer until the first insulating layer is exposed, thereby forming a trapezoidal layered portion; depositing an insulating material on the first insulating layer to form a second insulating layer to bury a periphery of the trapezoidal layered portion; and forming a second magnetic layer on the second insulating layer.

Abstract translation: 提供磁记录头及其制造方法。 该方法包括在第一绝缘层上依次层叠第一磁性层和绝缘覆盖层; 在所述绝缘覆盖层上形成期望宽度的掩模图案，并且蚀刻所述第一磁性层和所述绝缘盖层直到所述第一绝缘层露出，从而形成梯形层叠部分; 在所述第一绝缘层上沉积绝缘材料以形成第二绝缘层以埋设所述梯形分层部分的周边; 以及在所述第二绝缘层上形成第二磁性层。

公开(公告)号：US20090141407A1

公开(公告)日：2009-06-04

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: G11B5/33

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

公开(公告)号：US20090117409A1

公开(公告)日：2009-05-07

申请号：US12117766

申请日：2008-05-09

Applicant: Hoo-san LEE ,  Hoon-sang Oh

Inventor： Hoo-san LEE ,  Hoon-sang Oh

IPC: G11B5/62 ,  G11B5/84

CPC classification number: G11B5/855

Abstract: A perpendicular magnetic recording medium and a method of manufacturing the same are provided. The perpendicular magnetic recording medium includes a substrate, and a recording layer comprising a plurality of independent first magnetic body regions and a plurality of second magnetic body regions formed on the substrate, the second magnetic body regions separating the first magnetic body regions from each other, and being formed by implanting dopant into a region in which the first magnetic body regions are to be separated. Each of the first magnetic body regions has an L10 structure and the dopant has an ionic or molecular shape.

Abstract translation: 提供了一种垂直磁记录介质及其制造方法。 垂直磁记录介质包括基板和包括形成在基板上的多个独立的第一磁体区域和多个第二磁体区域的记录层，第一磁体区域将第一磁体区域彼此分开， 并且通过将掺杂剂注入到其中将要分离第一磁性体区域的区域中而形成。 每个第一磁体区域具有L10结构，并且掺杂剂具有离子或分子形状。

公开(公告)号：US20070230053A1

公开(公告)日：2007-10-04

申请号：US11655217

申请日：2007-01-19

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

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

IPC: G11B5/74

CPC classification number: G11B5/667

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20060158780A1

公开(公告)日：2006-07-20

申请号：US11329062

申请日：2006-01-11

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: G11B5/1871 ,  G11B5/1278 ,  G11B5/3116 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

Abstract: A magnetic recording head and a method of manufacturing the same. The magnetic recording head includes a stack containing a main pole and a return pole. The stack includes a first magnetic layer having a groove formed therein; an insulating layer covering a surface of the groove; and a second magnetic layer pattern filling the groove covered with the insulating layer.

Abstract translation: 磁记录头及其制造方法。 磁记录头包括一个包含一个主极和一个返回极的堆叠。 堆叠包括其中形成有凹槽的第一磁性层; 覆盖所述槽的表面的绝缘层; 以及填充由绝缘层覆盖的沟槽的第二磁性层图案。