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    • 2. 发明授权
    • Hard disk drive, method of controlling flying height of magnetic head thereof, and recording medium containing computer program thereon
    • 硬盘驱动器,控制其磁头的飞行高度的方法以及其上包含计算机程序的记录介质
    • US08139308B2
    • 2012-03-20
    • US12108679
    • 2008-04-24
    • Young-Shin KimHae Jung LeeChang-Hwan Lee
    • Young-Shin KimHae Jung LeeChang-Hwan Lee
    • G11B21/02
    • G11B5/6064G11B5/607
    • A method of controlling a flying height of a magnetic head of a hard disk drive includes calculating a corrected flying on demand (FOD) voltage to correct a difference between a measured flying height measured by applying a burn-in FOD voltage corresponding to a target flying height and a burn-in flying height in a reference FOD voltage profile corresponding to the burn-in FOD voltage, using the reference FOD voltage profile, in the reference FOD voltage profile that is a profile of a second signal for calculating the flying height of the magnetic head with respect to a first signal for calculating an FOD voltage that allows an end of the magnetic head to thermally expand and protrude when applied to a heater included in the magnetic head, and applying an applied FOD voltage obtained by applying the corrected FOD voltage, to the burn-in FOD voltage, to control the flying height of the magnetic head. Thus, the reliability in the read/write operation can be improved and performance of the hard disk drive can be improved.
    • 一种控制硬盘驱动器的磁头的飞行高度的方法包括计算校正的飞行点数(FOD)电压,以校正通过应用与目标飞行相对应的老化FOD电压测量的测量飞行高度之间的差异 在参考FOD电压分布中使用参考FOD电压分布,该参考FOD电压曲线是用于计算飞行高度的第二个信号的曲线,该参考FOD电压曲线对应于老化FOD电压的参考FOD电压曲线中的高度和老化飞行高度 所述磁头相对于用于计算FOD电压的第一信号,所述第一信号允许当施加到包括在所述磁头中的加热器时磁头的端部热膨胀和突出,以及施加通过应用校正的FOD而获得的施加的FOD电压 电压,到老化的FOD电压,以控制磁头的飞行高度。 因此,可以提高读/写操作的可靠性,并且可以提高硬盘驱动器的性能。
    • 4. 发明授权
    • Methods and apparatus determining and/or using overshoot control of write current for optimized head write control in assembled disk drives
    • 方法和装置确定和/或使用写入电流的过冲控制,以便在组装的磁盘驱动器中优化磁头写入控制
    • US07253978B2
    • 2007-08-07
    • US11176414
    • 2005-07-06
    • Hae Jung LeeSang LeeKeung Youn Cho
    • Hae Jung LeeSang LeeKeung Youn Cho
    • G11B27/36
    • G11B5/455G11B2005/0008
    • The invention includes a testing method which may be applied to at least one writer in a disk drive during the self-test phase to generate write parameters, focused on the Over Shoot Control (OSC) of the write current parameter to improve the reliability of write operations by that writer. The Minimum OSC is used for write operations in normal temperatures. The Optimum OSC is used for a first lower temperature range, preferably between essentially 15 degrees Centigrade and essentially 5 degrees Centigrade. The Maximum OSC is preferred below essentially 5 degrees Centigrade. The Minimum OSC should preferably guarantee both an Adjacent Track Write (ATW) criteria, as well as guarantee a Write Induced Instability (WII) criteria. The invention includes the write parameter collection, as well as the disk drive containing the generated write parameter collection. The invention also includes the method of using that write parameter collection to control a writer while writing to tracks belonging to the radial zone collection and program systems implementing the invention's methods.
    • 本发明包括测试方法,其可以在自检阶段期间应用于磁盘驱动器中的至少一个写入器以产生写入参数,其集中在写入当前参数的过拍控制(OSC)上,以提高写入的可靠性 作家的作业。 最低OSC用于正常温度下的写入操作。 最佳OSC用于第一较低温度范围,优选在基本上15摄氏度和基本上5摄氏度之间。 最高OSC优选低于基本上5摄氏度。 最小OSC应优选保证相邻轨道写入(ATW)标准,并保证写入诱发不稳定(WII)标准。 本发明包括写入参数集合以及包含生成的写入参数集合的磁盘驱动器。 本发明还包括使用该写入参数集来控制写入器同时写入属于径向区域集合的轨道和实现本发明方法的程序系统的方法。
    • 9. 发明申请
    • Hard disk drive, method of controlling flying height of magnetic head thereof, and recording medium containing computer program thereon
    • 硬盘驱动器,控制其磁头的飞行高度的方法以及其上包含计算机程序的记录介质
    • US20080266704A1
    • 2008-10-30
    • US12108679
    • 2008-04-24
    • Young Shin KimHae Jung LeeChang-Hwan Lee
    • Young Shin KimHae Jung LeeChang-Hwan Lee
    • G11B21/02
    • G11B5/6064G11B5/607
    • A method of controlling a flying height of a magnetic head of a hard disk drive includes calculating a corrected flying on demand (FOD) voltage to correct a difference between a measured flying height measured by applying a burn-in FOD voltage corresponding to a target flying height and a burn-in flying height in a reference FOD voltage profile corresponding to the burn-in FOD voltage, using the reference FOD voltage profile, in the reference FOD voltage profile that is a profile of a second signal for calculating the flying height of the magnetic head with respect to a first signal for calculating an FOD voltage that allows an end of the magnetic head to thermally expand and protrude when applied to a heater included in the magnetic head, and applying an applied FOD voltage obtained by applying the corrected FOD voltage, to the burn-in FOD voltage, to control the flying height of the magnetic head. Thus, the reliability in the read/write operation can be improved and performance of the hard disk drive can be improved.
    • 一种控制硬盘驱动器的磁头的飞行高度的方法包括计算校正的飞行点数(FOD)电压,以校正通过应用与目标飞行相对应的老化FOD电压测量的测量飞行高度之间的差异 在参考FOD电压分布中使用参考FOD电压分布,该参考FOD电压曲线是用于计算飞行高度的第二个信号的曲线,该参考FOD电压曲线对应于老化FOD电压的参考FOD电压曲线中的高度和老化飞行高度 所述磁头相对于用于计算FOD电压的第一信号,所述第一信号允许当施加到包括在所述磁头中的加热器时磁头的端部热膨胀和突出,以及施加通过应用校正的FOD而获得的施加的FOD电压 电压,到老化的FOD电压,以控制磁头的飞行高度。 因此,可以提高读/写操作的可靠性,并且可以提高硬盘驱动器的性能。
    • 10. 发明授权
    • Method of estimating a thermal pole tip protrusion for a head gimbal assembly
    • 估计头部万向节组件的热极尖突起的方法
    • US07089649B2
    • 2006-08-15
    • US10256553
    • 2002-09-26
    • Geng WangHae Jung LeeKeung Youn ChoSang Lee
    • Geng WangHae Jung LeeKeung Youn ChoSang Lee
    • G11B5/127H04R31/00
    • G11B5/3136G11B5/012G11B5/455G11B5/4806G11B5/4833G11B5/484Y10T29/49025Y10T29/49027Y10T29/49028Y10T29/49032Y10T29/49036
    • Thermal pole tip protrusion is caused by materials in and around head slider expanding during write operations till they protrude, leading to contact with the rotating disk surface, altering the flying height and often wearing down part of the disk surface. While well known that read-write heads expand during writing, the inventors who recognized this situation's significance, particularly as flying height decreases and data rates increase, both required for high areal density disk drives. The inventors realized that they could detect the problem at the spin stand level by testing head gimbal assemblies to reliably, and inexpensively, predict the tendency for thermal pole tip protrusion. This leads to selection of head gimbal assemblies, which do not have the thermal pole tip protrusion tendency. The selected head gimbal assemblies have better reliability, as do actuators and disk drives made with the selected head gimbal assemblies.
    • 热敏头尖突起由写入操作期间头部滑块内和周围的材料引起,直到它们突出,导致与旋转盘表面接触,改变飞行高度并经常磨损盘表面的一部分。 虽然众所周知,读写头在写入期间扩展,但是认识到这种情况的重要性的发明人,特别是当高密度磁盘驱动器都需要飞行高度降低和数据速率增加时。 本发明人意识到,它们可以通过测试头万向架组件可靠且廉价地预测热极尖端突起的趋势来检测旋转台水平的问题。 这导致了不具有热极尖突起倾向的头万向节组件的选择。 所选择的头万向架组件具有更好的可靠性,与使用所选择的头万向架组件制造的致动器和磁盘驱动器一样。