公开(公告)号：US07561368B2

公开(公告)日：2009-07-14

申请号：US11923016

申请日：2007-10-24

申请人： Sung-chul Kim ,  Jong-yoon Kim

发明人： Sung-chul Kim ,  Jong-yoon Kim

IPC分类号： G11B21/02

CPC分类号： G11B5/6064 ,  G11B5/607

摘要： A hard disc drive (HDD) that has improved head stability at low temperatures and a method of supplying current to a head of the HDD. The HDD includes a disc, a tunneling magneto resistance (TuMR) head to read data recorded on the disc having a heating coil, and a current control unit to supply a current corresponding to the ambient temperature surrounding the HDD to the heating coil. The current control unit supplies a current corresponding to the ambient temperature to the heating coil of the head. Since a heating coil is inserted in the TuMR head, an optimum current corresponding to the ambient temperature can be supplied to the heating coil, and thus, the head instability during a reading operation at low temperatures can be prevented.

摘要翻译： 在低温下具有改善的头稳定性的硬盘驱动器（HDD）以及向HDD的头部供电的方法。 HDD包括盘，隧道磁阻（TuMR）头，用于读取记录在具有加热线圈的盘上的数据;以及电流控制单元，用于将与HDD周围的环境温度相对应的电流提供给加热线圈。 电流控制单元将对应于环境温度的电流提供给磁头的加热线圈。 由于加热线圈插入到TuMR头中，因此可以将与环境温度相对应的最佳电流供给到加热线圈，从而可以防止在低温读取操作期间的头部不稳定性。

公开(公告)号：US20080247080A1

公开(公告)日：2008-10-09

申请号：US11923016

申请日：2007-10-24

申请人： Sung-chul KIM ,  Jong-yoon Kim

发明人： Sung-chul KIM ,  Jong-yoon Kim

IPC分类号： G11B21/02 ,  G11B5/58

CPC分类号： G11B5/6064 ,  G11B5/607

摘要： A hard disc drive (HDD) that has improved head stability at low temperatures and a method of supplying current to a head of the HDD. The HDD includes a disc, a tunneling magneto resistance (TuMR) head to read data recorded on the disc having a heating coil, and a current control unit to supply a current corresponding to the ambient temperature surrounding the HDD to the heating coil. The current control unit supplies a current corresponding to the ambient temperature to the heating coil of the head. Since a heating coil is inserted in the TuMR head, an optimum current corresponding to the ambient temperature can be supplied to the heating coil, and thus, the head instability during a reading operation at low temperatures can be prevented.

摘要翻译： 在低温下具有改善的头稳定性的硬盘驱动器（HDD）以及向HDD的头部供电的方法。 HDD包括盘，隧道磁阻（TuMR）头，用于读取记录在具有加热线圈的盘上的数据;以及电流控制单元，用于将与HDD周围的环境温度相对应的电流提供给加热线圈。 电流控制单元将对应于环境温度的电流提供给磁头的加热线圈。 由于加热线圈插入到TuMR头中，因此可以将与环境温度相对应的最佳电流供给到加热线圈，从而可以防止在低温读取操作期间的头部不稳定性。

公开(公告)号：US20050052768A1

公开(公告)日：2005-03-10

申请号：US10934364

申请日：2004-09-07

申请人： Chang-dong Yeo ,  Jong-yoon Kim

发明人： Chang-dong Yeo ,  Jong-yoon Kim

IPC分类号： G11B5/455 ,  G11B19/02 ,  G11B27/36

CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B2220/2516

摘要： A method of screening a hard disk drive (HDD) including: measuring one or more parameters to display read/write head performances at least two times during an HDD process; and calculating variances of the measured one or more parameters and judging whether head degradation has occurred based on the calculated variances.

摘要翻译： 一种屏蔽硬盘驱动器（HDD）的方法，包括：测量一个或多个参数以在HDD处理期间至少两次显示读/写头性能; 并计算所测量的一个或多个参数的方差，并基于计算的方差判断头部退化是否发生。

公开(公告)号：US07095576B2

公开(公告)日：2006-08-22

申请号：US10943161

申请日：2004-09-17

申请人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu ,  Jin-wan Jun

发明人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu ,  Jin-wan Jun

IPC分类号： G11B5/09

CPC分类号： G11B5/09 ,  G11B27/36 ,  G11B2220/20

摘要： A method and apparatus for controlling a write current capable of improving an adjacent track erasure (ATE) property of a hard disk drive. The method for controlling the write current in a hard disk drive includes applying overshoot current and write current to a head to write data on a disk, waiting for a predetermined time to pass, with the predetermined time being determined according to a thermal pole tip protrusion (TPTP) property of the head, and reducing the overshoot current and the write current upon passing of the predetermined time. Accordingly, since the overshoot current and the write current are decreased at the time of the TPTP being saturated, it is possible to effectively improve an ATE property of the hard disk drive.

摘要翻译： 一种用于控制能够改善硬盘驱动器的相邻轨道擦除（ATE）特性的写入电流的方法和装置。 用于控制硬盘驱动器中的写入电流的方法包括将过冲电流和写入电流施加到磁头以在盘上写入数据，等待预定时间过去，其中预定时间根据热极尖端突起 （TPTP）特性，并且在经过预定时间后减小过冲电流和写入电流。 因此，由于在TPTP饱和时，过冲电流和写入电流减小，因此能够有效地提高硬盘驱动器的ATE特性。

公开(公告)号：US20050146803A1

公开(公告)日：2005-07-07

申请号：US10943161

申请日：2004-09-17

申请人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu ,  Jin-wan Jun

发明人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu ,  Jin-wan Jun

IPC分类号： G11B21/02 ,  G11B5/035 ,  G11B5/09 ,  G11B27/36

CPC分类号： G11B5/09 ,  G11B27/36 ,  G11B2220/20

摘要： A method and apparatus for controlling a write current capable of improving an adjacent track erasure (ATE) property of a hard disk drive. The method for controlling the write current in a hard disk drive includes applying overshoot current and write current to a head to write data on a disk, waiting for a predetermined time to pass, with the predetermined time being determined according to a thermal pole tip protrusion (TPTP) property of the head, and reducing the overshoot current and the write current upon passing of the predetermined time. Accordingly, since the overshoot current and the write current are decreased at the time of the TPTP being saturated, it is possible to effectively improve an ATE property of the hard disk drive.

摘要翻译： 一种用于控制能够改善硬盘驱动器的相邻轨道擦除（ATE）特性的写入电流的方法和装置。 用于控制硬盘驱动器中的写入电流的方法包括将过冲电流和写入电流施加到磁头以在盘上写入数据，等待预定时间过去，其中预定时间根据热极尖端突起 （TPTP）特性，并且在经过预定时间后减小过冲电流和写入电流。 因此，由于在TPTP饱和时，过冲电流和写入电流减小，因此能够有效地提高硬盘驱动器的ATE特性。

公开(公告)号：US20050057835A1

公开(公告)日：2005-03-17

申请号：US10942772

申请日：2004-09-17

申请人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu

发明人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu

IPC分类号： G11B5/09 ,  G11B5/00 ,  G11B5/02 ,  G11B5/40

CPC分类号： G11B5/40 ,  G11B2005/0018

摘要： A method and apparatus for optimizing write properties of a magnetic head capable of performing read/write functions on a medium including defining the magnetic head as a normal head, a low temperature weak write (WW) head, or a high temperature WW head, and optimizing the write properties using optimal over shoot control (OSC) and write current (WC) according to the defined kind of magnetic head. Accordingly, the magnetic head in a hard disk drive (HDD) can be defined as the normal head, the low temperature WW head, or the high temperature WW head. Since the method uses the optimal OSC and WC values, according to the defined kind of magnetic head, in consideration of writability of the magnetic head and environmental temperature, low temperature or high temperature WW problems are avoided.

摘要翻译： 一种用于优化能够在介质上执行读/写功能的磁头的写入特性的方法和装置，包括将磁头定义为正常头，低温弱写（WW）头或高温WW头，以及 根据所定义的磁头类型，使用最佳过拍控制（OSC）和写入电流（WC）优化写入属性。 因此，硬盘驱动器（HDD）中的磁头可以被定义为普通头，低温WW头或高温WW头。 由于该方法使用最佳的OSC和WC值，根据所定义的磁头类型，考虑到磁头的可写性和环境温度，避免了低温或高温的WW问题。

公开(公告)号：US07218467B2

公开(公告)日：2007-05-15

申请号：US10942772

申请日：2004-09-17

申请人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu

发明人： Jong-yoon Kim ,  Jae-deog Cho ,  Seong-hwan Yu

IPC分类号： G11B5/09

CPC分类号： G11B5/40 ,  G11B2005/0018

摘要： A method and apparatus for optimizing write properties of a magnetic head capable of performing read/write functions on a medium including defining the magnetic head as a normal head, a low temperature weak write (WW) head, or a high temperature WW head, and optimizing the write properties using optimal over shoot control (OSC) and write current (WC) according to the defined kind of magnetic head. Accordingly, the magnetic head in a hard disk drive (HDD) can be defined as the normal head, the low temperature WW head, or the high temperature WW head. Since the method uses the optimal OSC and WC values, according to the defined kind of magnetic head, in consideration of writability of the magnetic head and environmental temperature, low temperature or high temperature WW problems are avoided.

摘要翻译： 一种用于优化能够在介质上执行读/写功能的磁头的写入特性的方法和装置，包括将磁头定义为正常头，低温弱写（WW）头或高温WW头，以及 根据所定义的磁头类型，使用最佳过拍控制（OSC）和写入电流（WC）优化写入属性。 因此，硬盘驱动器（HDD）中的磁头可以被定义为普通头，低温WW头或高温WW头。 由于该方法使用最佳的OSC和WC值，根据所定义的磁头类型，考虑到磁头的可写性和环境温度，避免了低温或高温的WW问题。

公开(公告)号：US07123428B2

公开(公告)日：2006-10-17

申请号：US10934364

申请日：2004-09-07

申请人： Chang-dong Yeo ,  Jong-yoon Kim

发明人： Chang-dong Yeo ,  Jong-yoon Kim

IPC分类号： G11B27/36

CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B2220/2516

摘要： A method of screening a hard disk drive (HDD) including: measuring one or more parameters to display read/write head performances at least two times during an HDD process; and calculating variances of the measured one or more parameters and judging whether head degradation has occurred based on the calculated variances.

摘要翻译： 一种屏蔽硬盘驱动器（HDD）的方法，包括：测量一个或多个参数以在HDD处理期间至少两次显示读/写头性能; 并计算所测量的一个或多个参数的方差，并基于计算的方差判断头部退化是否发生。

公开(公告)号：US07102838B2

公开(公告)日：2006-09-05

申请号：US10733818

申请日：2003-12-12

申请人： Jong-yoon Kim ,  Chang-dong Yeo ,  Seung-hyun Song ,  Geun-soo Kim

发明人： Jong-yoon Kim ,  Chang-dong Yeo ,  Seung-hyun Song ,  Geun-soo Kim

IPC分类号： G11B27/36

CPC分类号： G11B19/04 ,  G11B5/09 ,  G11B27/36

摘要： A method optimizing a recording current in consideration of operating temperatures of a hard disk drive and a method of setting a recording density in consideration of tracks per inch (TPI) or adjacent track erasure (ATE) characteristics. The method of optimizing the recording current measures a rate of errors under a test condition corresponding to the operating temperature of a hard disk drive, while changing a recording parameter, selects a recording parameter value corresponding to a smallest rate of errors, and optimizes the recording current for the hard disk drive under operating environmental conditions using the selected recording parameter value.

摘要翻译： 考虑到硬盘驱动器的工作温度优化记录电流的方法和考虑到每英寸轨道（TPI）或相邻磁道擦除（ATE）特性来设置记录密度的方法。 在改变记录参数的同时，优化记录电流的方法在与硬盘驱动器的工作温度相对应的测试条件下测量误差率，选择对应于最小误差率的记录参数值，并优化记录 使用所选记录参数值在工作环境条件下为硬盘驱动器的电流。

公开(公告)号：US06992849B2

公开(公告)日：2006-01-31

申请号：US10621354

申请日：2003-07-18

申请人： Chang-dong Yeo ,  Jong-yoon Kim ,  Cheel-hoon Park

发明人： Chang-dong Yeo ,  Jong-yoon Kim ,  Cheel-hoon Park

IPC分类号： G11B5/455

CPC分类号： G11B27/36 ,  G11B5/012 ,  G11B5/455 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2220/20

摘要： A method and apparatus to determine a magnetic write width of a magnetic head using burst patterns. The method includes seeking a target track on a magnetic disc to write a burst pattern on the target track; seeking tracks adjacent to the target track to write burst patterns on the adjacent tracks, which are offtracked by a predetermined percentage toward the target track, moving the magnetic head along a radial direction of the magnetic disc and measure an output signal of the magnetic head, to create an offtrack profile, and determining an amplitude reduction ratio of the target track from the offtrack profile, to determine a magnetic write width corresponding to the determined amplitude reduction ratio.

摘要翻译： 使用突发图案确定磁头的磁写入宽度的方法和装置。 该方法包括在磁盘上寻找目标轨迹以将目标轨迹上的脉冲串模式写入; 寻找与目标轨道相邻的轨迹，以在相对于目标轨道预定百分比的轨迹上相冲突的轨迹上写入脉冲串图案，沿着磁盘的径向方向移动磁头并测量磁头的输出信号， 以创建一个纵向轮廓，以及根据俯视轮廓确定目标轨迹的幅度减小率，以确定与所确定的幅度减小率相对应的磁写入宽度。