公开(公告)号：US07490016B2

公开(公告)日：2009-02-10

申请号：US11828516

申请日：2007-07-26

Applicant: Dong-ki Min ,  Sung-hoon Choa ,  Seung-bum Hong

Inventor： Dong-ki Min ,  Sung-hoon Choa ,  Seung-bum Hong

IPC: G01C25/00

CPC classification number: H04N5/349

Abstract: A method and apparatus for calibrating a position of an image sensor, and a method of detecting the position of an image sensor are provided. The method of calibrating the position of an image sensor includes: obtaining first image information corresponding to a first position of the image sensor and obtaining second image information corresponding to a second position of the image sensor, calculating cross-correlation values between the obtained first image information and second image information; determining whether or not the calculated cross-correlation values are symmetrical; setting a driving power value of the image sensor for moving the image sensor the distance between the first position to the second position as a reference driving power value for moving the image sensor one-pixel distance, if it is determined that the cross-correlation values are not symmetrical; and calibrating the position of the image sensor by using the set driving power value.

Abstract translation: 提供了用于校准图像传感器的位置的方法和装置以及检测图像传感器的位置的方法。 校准图像传感器的位置的方法包括：获得与图像传感器的第一位置相对应的第一图像信息，并获得与图像传感器的第二位置对应的第二图像信息，计算所获得的第一图像之间的互相关值 信息和第二图像信息; 确定所计算的互相关值是否对称; 设置图像传感器的驱动功率值，用于将图像传感器的距离移动到第一位置与第二位置之间，作为用于使图像传感器移动一像素距离的基准驱动功率值，如果确定互相关值 不对称 并使用设定的驱动功率值来校准图像传感器的位置。

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）。

公开(公告)号：US20080180832A1

公开(公告)日：2008-07-31

申请号：US11851028

申请日：2007-09-06

Applicant: Seung Bum HONG ,  Yun Seok Kim ,  Kwang Soo No ,  Sung Hoon Choa ,  Simon Buehlmann ,  Ji Yoon Kim

Inventor： Seung Bum HONG ,  Yun Seok Kim ,  Kwang Soo No ,  Sung Hoon Choa ,  Simon Buehlmann ,  Ji Yoon Kim

IPC: G11B21/02

CPC classification number: G11B9/02

Abstract: A method of recording bits on a ferroelectric medium using a scanning probe or a small conductive structure and a recording medium thereof, in which bit sizes can be decreased to increase data recording density as well as to reduce losses in reproduction signals. The method includes applying switching voltages to a lower electrode of the ferroelectric medium and the probe so as to write bits while approaching the probe to or bringing the probe into contact with a surface of the ferroelectric medium; and applying a base bias voltage, which is equal or smaller in magnitude and opposite in sign to the switching voltages between the switching voltages to make the probe equipotential with an upper portion of the record medium.

Abstract translation: 使用扫描探针或小导电结构及其记录介质在铁电介质上记录位的方法，其中可以减小比特大小以增加数据记录密度以及减少再现信号中的损失。 该方法包括向铁电介质和探针的下电极施加开关电压，以便在接近探头或使探针与铁电介质的表面接触时写入位; 以及施加基本偏置电压，其大小等于或小于符号相反的开关电压之间的开关电压，以使探针与记录介质的上部等电位。

公开(公告)号：US20080138661A1

公开(公告)日：2008-06-12

申请号：US11781311

申请日：2007-07-23

Applicant: Chee-kheng LIM ,  Sung-hoon Choa

Inventor： Chee-kheng LIM ,  Sung-hoon Choa

IPC: G11B5/147 ,  G11B5/66

CPC classification number: G11B5/00 ,  G11B2005/0002 ,  G11C11/14 ,  G11C19/0808 ,  G11C19/0841

Abstract: Provided are an information storage device using movement of a magnetic domain wall, and methods of manufacturing and operating the information storage device. The information storage device includes a storage track having magnetic domains and a writer for recording data to the storage track, wherein the writer comprises: a first magnetic layer and a second magnetic layer that is formed to cover a portion of the first magnetic layer and has a smaller magnetic anisotropic energy than the first magnetic layer.

Abstract translation: 提供了使用磁畴壁的移动的信息存储装置，以及制造和操作信息存储装置的方法。 信息存储装置包括具有磁畴的存储轨道和用于将数据记录到存储轨道的写入器，其中写入器包括：第一磁性层和第二磁性层，形成为覆盖第一磁性层的一部分并具有 比第一磁性层更小的磁各向异性能量。

公开(公告)号：US20080137521A1

公开(公告)日：2008-06-12

申请号：US11984478

申请日：2007-11-19

Applicant: Sung-chul Lee ,  Sung-hoon Choa ,  Kwang-seok Kim

Inventor： Sung-chul Lee ,  Sung-hoon Choa ,  Kwang-seok Kim

IPC: G11B9/00

CPC classification number: G11C11/15 ,  G11C19/0841

Abstract: A data storage device using magnetic domain wall motion may include a first magnetic layer having a plurality of magnetic domains. A second magnetic layer may be connected to the first magnetic layer, and a connection layer may be disposed between the first and second magnetic layers. A resistive magnetic layer may be disposed between each of the first and second magnetic layers and the connection layer. Accordingly, when current is supplied to the data storage device to move a magnetic domain wall, the leakage of current in a connection between the magnetic layers may be reduced or prevented, thus conserving power.

Abstract translation: 使用磁畴壁运动的数据存储装置可以包括具有多个磁畴的第一磁性层。 第二磁性层可以连接到第一磁性层，并且连接层可以设置在第一和第二磁性层之间。 电阻性磁性层可以设置在第一和第二磁性层和连接层中的每一个之间。 因此，当向数据存储装置提供电流以移动磁畴壁时，可以减少或防止磁层之间的连接中的电流泄漏，从而节省功率。

公开(公告)号：US20060066990A1

公开(公告)日：2006-03-30

申请号：US11270591

申请日：2005-11-10

Applicant: Jin-seung Sohn ,  Sung-hoon Choa

Inventor： Jin-seung Sohn ,  Sung-hoon Choa

IPC: G11B17/00

CPC classification number: G11B25/043 ,  G11B33/08

Abstract: A hard disk drive having a vibration reducing damper is disclosed. The hard disk drive is provided with a damper which is interposed between a through hole provided at a cover plate and a screw joined to the upper end of the shaft of a spindle motor, and includes at least one viscoelastic material layer. It is preferable that the damper has a multi-layered structure in which at least one high stiffness layer has relatively higher stiffness and at least one low stiffness layer made of a viscoelastic material has relatively lower stiffness. With the above configuration, the damper restrains vibrations generated by the spindle from being transferred to the cover plate, noises generated by the hard disk drive are reduced, and, in addition, since vibrations generated by the spindle motor are damped, disk fluttering is reduced.

公开(公告)号：US08562891B2

公开(公告)日：2013-10-22

申请号：US13298404

申请日：2011-11-17

Applicant: Eun-Hyoung Cho ,  Sung Hoon Choa ,  Jin Seung Sohn ,  Byung Kyu Lee ,  Du Hyun Lee

Inventor： Eun-Hyoung Cho ,  Sung Hoon Choa ,  Jin Seung Sohn ,  Byung Kyu Lee ,  Du Hyun Lee

IPC: B29C59/16

CPC classification number: B05D5/02 ,  B29C47/92 ,  B82Y10/00 ,  B82Y40/00 ,  G03F7/00 ,  G03F7/0002 ,  Y10S977/887

Abstract: A process and an apparatus for performing a UV nano-imprint lithography are provided. The process uses a polymer pad which allows a uniform application of pressure to a patterned template and an easy removal of a residual resin layer. The apparatus includes a tilt and decentering corrector which allows an accurate alignment of layers during the nano-imprint lithography process.

公开(公告)号：US20110223279A1

公开(公告)日：2011-09-15

申请号：US13113534

申请日：2011-05-23

Applicant: Hae-sung Kim ,  Hyoung-soo Ko ,  Seung-bum Hong ,  Jin-seung Sohn ,  Sung-hoon Choa ,  Chee-kheng Lim

Inventor： Hae-sung Kim ,  Hyoung-soo Ko ,  Seung-bum Hong ,  Jin-seung Sohn ,  Sung-hoon Choa ,  Chee-kheng Lim

IPC: B29C59/02

CPC classification number: G03F1/14 ,  B29C59/002 ,  B82Y10/00 ,  B82Y40/00 ,  G03F7/0002 ,  Y10T428/24917

Abstract: A nano imprint master and a method of manufacturing the same are provided. The method includes: implanting conductive metal ions into a substrate including quartz to form a conductive layer inside the quartz substrate; coating a resist on the quartz substrate in which the conductive layer is formed, to form a resist coating layer; exposing the resist coating layer to an electron beam to form micropatterns; etching the quartz substrate by using the resist coating layer, in which the micropatterns are formed, as a mask; and removing the resist coating layer to obtain a master in which micropatterns are formed.

Abstract translation: 提供了纳米压印母版及其制造方法。 该方法包括：将导电金属离子注入包括石英的衬底中，以在石英衬底内形成导电层; 在其上形成导电层的石英基板上涂覆抗蚀剂，以形成抗蚀剂涂层; 将抗蚀剂涂层暴露于电子束以形成微图案; 通过使用其中形成有微图案的抗蚀剂涂层作为掩模来蚀刻石英基板; 并除去抗蚀剂涂层以获得形成微图案的母版。

公开(公告)号：US07968253B2

公开(公告)日：2011-06-28

申请号：US11745609

申请日：2007-05-08

Applicant: Hae-sung Kim ,  Hyoung-soo Ko ,  Seung-bum Hong ,  Jin-seung Sohn ,  Sung-hoon Choa ,  Chee-kheng Lim

Inventor： Hae-sung Kim ,  Hyoung-soo Ko ,  Seung-bum Hong ,  Jin-seung Sohn ,  Sung-hoon Choa ,  Chee-kheng Lim

IPC: G03F1/00

CPC classification number: G03F1/14 ,  B29C59/002 ,  B82Y10/00 ,  B82Y40/00 ,  G03F7/0002 ,  Y10T428/24917

Abstract: A nano imprint master and a method of manufacturing the same are provided. The method includes: implanting conductive metal ions into a substrate including quartz to form a conductive layer inside the quartz substrate; coating a resist on the quartz substrate in which the conductive layer is formed, to form a resist coating layer; exposing the resist coating layer to an electron beam to form micropatterns; etching the quartz substrate by using the resist coating layer, in which the micropatterns are formed, as a mask; and removing the resist coating layer to obtain a master in which micropatterns are formed.

Abstract translation: 提供了纳米压印母版及其制造方法。 该方法包括：将导电金属离子注入包括石英的衬底中，以在石英衬底内形成导电层; 在其上形成导电层的石英基板上涂覆抗蚀剂，以形成抗蚀剂涂层; 将抗蚀剂涂层暴露于电子束以形成微图案; 通过使用其中形成有微图案的抗蚀剂涂层作为掩模来蚀刻石英基板; 并除去抗蚀剂涂层以获得形成微图案的母版。

公开(公告)号：US07957175B2

公开(公告)日：2011-06-07

申请号：US11980353

申请日：2007-10-31

Applicant: Chee-kheng Lim ,  Eun-hyoung Cho ,  Sung-hoon Choa

Inventor： Chee-kheng Lim ,  Eun-hyoung Cho ,  Sung-hoon Choa

IPC: G11C19/00

CPC classification number: G11C11/14 ,  G11C19/0808 ,  Y10S977/933 ,  Y10S977/935

Abstract: An information storage device using movement of magnetic domain walls includes a writing magnetic layer having a magnetic domain wall. A stack structure is formed on the writing magnetic layer. The stack structure includes a connecting magnetic layer and an information storing magnetic layer stacked sequentially. The information storage device also includes a reader for reading information stored in the information storing magnetic layer.