公开(公告)号：US07974039B1

公开(公告)日：2011-07-05

申请号：US12486682

申请日：2009-06-17

申请人： Jianfeng Xu ,  Soo-Choon Kang ,  Kazuhiro Saito ,  Hongchao Tim Zhao

发明人： Jianfeng Xu ,  Soo-Choon Kang ,  Kazuhiro Saito ,  Hongchao Tim Zhao

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/6005 ,  G11B5/6064 ,  G11B5/6076

摘要： A disk drive to reduce head instability during disk drive manufacturing is disclosed. The disk drive comprises: a disk; a dynamic flying height (DFH) read/write head; a flying height actuator to control the spacing between the DFH read/write head and the disk; and a controller. The controller controls operations in the disk drive including applying a sloped increasing power between a first voltage and a second voltage to move the DFH read/write head towards the disk.

摘要翻译： 公开了一种在磁盘驱动器制造期间减少磁头不稳定性的磁盘驱动器。 磁盘驱动器包括：磁盘; 动态飞行高度（DFH）读/写头; 用于控制DFH读/写磁头和磁盘之间的间距的飞行高度执行器; 和控制器。 控制器控制磁盘驱动器中的操作，包括在第一电压和第二电压之间施加倾斜的增加功率，以将DFH读/写头朝向磁盘移动。

公开(公告)号：US07817286B2

公开(公告)日：2010-10-19

申请号：US11644695

申请日：2006-12-22

申请人： Soo-Choon Kang ,  Remmelt Pit

发明人： Soo-Choon Kang ,  Remmelt Pit

IPC分类号： G01G11/02

CPC分类号： G11B5/6052

摘要： In one embodiment and method of the present invention, an optical interference fly height (FH) test apparatus for measuring FH is disclosed, in accordance with an embodiment of the present invention, to include a slider, a transparent disk, means for directing a light beam directed between the slider and the disk, and means for iteratively measuring an estimated FH using at least two points of measurement on the slider when the slider is moved away from the disk at a pitch angle, wherein the estimated FH is computed as a function of the pitch angle and during each iteration, a previously-estimated FH is used to converge the estimated FH so that the estimated FH is within a predetermined range from the actual FH.

摘要翻译： 在本发明的一个实施例和方法中，根据本发明的实施例，公开了一种用于测量FH的光学干涉飞行高度（FH）测试装置，包括滑块，透明盘，用于引导光 指向滑块和盘之间的光束，以及当滑块以桨距角离开盘时，使用滑块上的至少两个测量点迭代地测量估计的FH的装置，其中估计的FH被计算为功能 并且在每次迭代期间，使用先前估计的FH来收敛估计的FH，使得估计的FH在从实际FH的预定范围内。

公开(公告)号：US07440220B1

公开(公告)日：2008-10-21

申请号：US11754606

申请日：2007-05-29

申请人： Soo-Choon Kang ,  Michael Nojaba ,  Rex Niedermeyer

发明人： Soo-Choon Kang ,  Michael Nojaba ,  Rex Niedermeyer

IPC分类号： G11B21/02

CPC分类号： G11B21/21 ,  G11B5/3133 ,  G11B5/6029 ,  G11B5/607 ,  G11B5/6076 ,  G11B7/122

摘要： A novel method for defining a touch-down power for a head that has a head-based flying height actuator is disclosed and claimed. A linear relationship between power and spacing is derived by fitting to first and second transducer-disk spacings corresponding to first and second electrical powers applied to the head-based flying height actuator. A third spacing between the transducer and the disk is determined when a greater third electrical power is applied to the flying height actuator. An estimated third spacing between the transducer and the disk, corresponding to application of the third electrical power to the flying height actuator, is calculated using the derived linear relationship and the third electrical power. The touch-down power is defined to be substantially equal to the second electrical power if an error between the third spacing and the estimated third spacing is larger than a first threshold.

摘要翻译： 公开并要求保护一种用于限定具有基于头部飞行高度致动器的头部的降低功率的新颖方法。 功率和间距之间的线性关系通过适应对应于施加到基于头部的飞行高度致动器的第一和第二电功率的第一和第二换能器盘间距而导出。 当向飞行高度致动器施加更大的第三电力时，确定换能器和盘之间的第三间距。 使用导出的线性关系和第三电功率来计算对应于向飞行高度致动器施加第三电力的换能器和盘之间的估计的第三间隔。 如果第三间隔和估计的第三间隔之间的误差大于第一阈值，则触摸屏功率被定义为基本上等于第二电功率。

公开(公告)号：US07009813B2

公开(公告)日：2006-03-07

申请号：US10429320

申请日：2003-05-05

申请人： Soo-Choon Kang ,  Chie C. Poon ,  Hemantha K. Wickramasinghe

发明人： Soo-Choon Kang ,  Chie C. Poon ,  Hemantha K. Wickramasinghe

IPC分类号： G11B5/60

CPC分类号： G11B5/187 ,  G11B5/012 ,  G11B5/02 ,  G11B5/10 ,  G11B5/105 ,  G11B5/6005 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A hard disk drive slider has an air bearing surface that uses the ambient air in the disk drive as a heat source for thermal-assisted recording. Incoming air between the slider and the disk surface is pressurized to produce heat sufficient to heat the recording media. A very small thermal pad is located at the trailing end of the air bearing surface and wraps around the magnetic recording head. The thermal pad includes small pockets to contain the heated air to provide heat to the recording media. The air can be pressurized to approximately 80 atm, which is sufficient to raise the air temperature to approximately 800 degrees C. at isentropic conditions. The heated air transfers the heat energy to the recording media by conduction to elevate a disk recording layer temperature for thermomagnetic recording.

摘要翻译： 硬盘驱动器滑块具有使用磁盘驱动器中的环境空气作为热辅助记录的热源的空气轴承表面。 滑块和盘表面之间的进入空气被加压以产生足以加热记录介质的热量。 一个非常小的散热垫位于空气支承表面的后端，并且包绕在磁记录头周围。 散热垫包括小口袋以容纳加热的空气以向记录介质提供热量。 空气可以被加压到大约80atm，这足以在等熵条件下将空气温度升高到约800℃。 加热的空气通过传导将热能传递到记录介质，以提高用于热磁记录的盘记录层温度。

公开(公告)号：US06775103B2

公开(公告)日：2004-08-10

申请号：US09824351

申请日：2001-04-02

申请人： Soo-Choon Kang ,  Jeffrey S. Lille

发明人： Soo-Choon Kang ,  Jeffrey S. Lille

IPC分类号： G11B560

CPC分类号： G11B5/60 ,  G11B5/6064 ,  G11B5/607

摘要： A slider head assembly is provided which includes a slider head for reading/writing data on the surface of a rotating disc. The slider head is disposed in spaced relationship with respect to the disc for read/write (R/W) operations. The slider head assembly is comprised of a body portion having an essentially planar surface positioned to co-act with the surface of the disc with a proximal end and a distal end. The proximal end or trailing slider surface of the head assembly has a read/write element thereat. The distal end or leading slider surface of the assembly has an actuation device mounted thereon, having a surface the position of which can be modified by an external signal to change the position of the head with respect to the planar or air bearing surface (ABS) of the head assembly. This will change the characteristics of the boundary layer of air between the rotating disc and the head, causing the head assembly to move closer to or farther from the rotating disc when actuated by the external signal. A preferred embodiment is a patterned heating element which selectively heats the edge of the leading surface of the slider to cause position modification of the device. The invention also contemplates the head assembly in combination with the rotating disc and a method of controlling the height of the head assembly with respect to the rotating disc.

摘要翻译： 提供了一种滑块头组件，其包括用于在旋转盘的表面上读/写数据的滑动头。 滑块头相对于用于读/写（R / W）操作的盘间隔开设置。 滑块头组件包括主体部分，其具有基本平坦的表面，其被定位成与盘的表面与近端和远端共同作用。 头组件的近端或后滑动器表面具有读/写元件。 组件的远端或前导滑块表面具有安装在其上的致动装置，其具有可以通过外部信号改变其位置的表面，以改变头部相对于平面或空气支承表面（ABS）的位置， 的头部组件。 这将改变旋转盘和头部之间的空气边界层的特性，当由外部信号致动时，头部组件移动到离开旋转盘更靠近或更远的位置。 优选实施例是图案化加热元件，其选择性地加热滑块的前表面的边缘以引起装置的位置修改。 本发明还考虑了与旋转盘组合的头组件和控制头组件相对于旋转盘的高度的方法。

公开(公告)号：US08786976B1

公开(公告)日：2014-07-22

申请号：US13237727

申请日：2011-09-20

申请人： Soo-Choon Kang ,  Siri S. Weerasooriya ,  Scott A. Ottele

发明人： Soo-Choon Kang ,  Siri S. Weerasooriya ,  Scott A. Ottele

IPC分类号： G11B21/02

CPC分类号： G11B21/12

摘要： A disk drive is disclosed comprising a head actuated over a disk surface, the head comprising a fly height actuator for controlling a fly height of the head, and a ramp for parking the head. A ramp procedure is executed by applying a control signal to the fly height actuator to decrease the fly height and receiving a corresponding fly height signal, and detecting whether the head is on the ramp in response to the fly height signal.

摘要翻译： 公开了一种磁盘驱动器，其包括在磁盘表面上致动的磁头，该磁头包括用于控制磁头高度的飞行高度致动器和用于停放磁头的斜坡。 通过向飞行高度致动器施加控制信号以降低飞行高度并接收对应的飞行高度信号，并且响应于飞行高度信号检测磁头是否在斜坡上，执行斜坡程序。

公开(公告)号：US08699173B1

公开(公告)日：2014-04-15

申请号：US13224118

申请日：2011-09-01

申请人： Soo-Choon Kang ,  Hongchao T. Zhao ,  Siri S. Weerasooriya

发明人： Soo-Choon Kang ,  Hongchao T. Zhao ,  Siri S. Weerasooriya

IPC分类号： G11B21/02

CPC分类号： G11B5/6076

摘要： A disk drive is disclosed comprising a head actuated over a disk, and a fly height actuator operable to control a fly height of the head over the disk. A periodic control signal is applied to the fly height actuator, a frequency response of a touchdown metric at a frequency of the periodic control signal is measured, and a touchdown event is detected in response to the frequency response of the touchdown metric.

摘要翻译： 公开了一种盘驱动器，其包括在盘上致动的头部，以及可操作以控制头部在盘上的飞行高度的飞行高度致动器。 周期控制信号被施加到飞行高度致动器，测量在周期性控制信号的频率处的触地度量的频率响应，并且响应于触地度量的频率响应来检测触地事件。

公开(公告)号：US06333835B1

公开(公告)日：2001-12-25

申请号：US09379039

申请日：1999-08-23

申请人： Soo-Choon Kang ,  Sanford Anthony Bolasna ,  Oscar Jaime Ruiz

发明人： Soo-Choon Kang ,  Sanford Anthony Bolasna ,  Oscar Jaime Ruiz

IPC分类号： G11B1732

CPC分类号： G11B5/6005

摘要： A recording head for a disk drive with a load/unload mechanism has an air bearing on one surface. The air bearing comprises a patterned set of three air bearing pads, at least five shallow pockets and one deep pocket. A narrow gap extends from the deep pocket and separates leading ones of the air bearing pads and shallow pockets from each other. The air bearing pads have unique, step-shaped geometry and the rear pad is virtually free of any shallow area. This configuration gives the air bearing superior performance characteristics over prior art designs with load/unload mechanisms.

摘要翻译： 具有装载/卸载机构的磁盘驱动器的记录头在一个表面上具有空气轴承。 空气轴承包括一组图案的三个空气轴承垫，至少五个浅袋和一个深口袋。 狭窄的间隙从深口袋延伸出来，将先前的空气轴承垫和浅口袋彼此分开。 空气轴承垫具有独特的阶梯形几何形状，后垫实际上没有任何浅的区域。 这种配置给出了空气轴承比具有加载/卸载机构的现有技术设计的优异的性能特性。

公开(公告)号：US07436620B1

公开(公告)日：2008-10-14

申请号：US11754896

申请日：2007-05-29

申请人： Soo-Choon Kang ,  Liwei Song

发明人： Soo-Choon Kang ,  Liwei Song

IPC分类号： G11B21/02

CPC分类号： G11B5/6005 ,  G11B5/6064 ,  G11B5/607

摘要： A novel method of selecting an electrical power, to be applied to a subject head-based flying height actuator during operation of a disk drive, is disclosed and claimed. A touch-down power for each of a plurality of representative heads is detected. A relationship between back-off power and touchdown power for the plurality of representative heads is estimated. A touch-down power for the subject head is detected. A back-off power for the subject head is calculated using the estimated relationship and the detected touch-down power for the subject head. The electrical power to be applied to the subject head-based flying height actuator is selected to be equal to the detected touch-down power for the subject head minus the calculated back-off power for the subject head.

摘要翻译： 公开并要求保护一种在盘驱动器的操作期间选择施加到基于物体头部的飞行高度致动器的电力的新颖方法。 检测到多个代表性头中的每一个的触发功率。 估计多个代表性头部的退避功率和触地功率之间的关系。 检测到被摄体头的触控电源。 使用估计的关系和检测到的被摄体头的触下电功率来计算被摄体头的后退功率。 被施加到被摄体头部的飞行高度致动器的电力被选择为等于被检测头的检测到的下降功率减去所计算的对象头的退避功率。

公开(公告)号：US06674611B2

公开(公告)日：2004-01-06

申请号：US10040557

申请日：2002-01-04

申请人： Sanford A. Bolasna ,  Soo-Choon Kang

发明人： Sanford A. Bolasna ,  Soo-Choon Kang

IPC分类号： G11B560

CPC分类号： G11B5/6005

摘要： A dual etch depth slider air bearing surface includes a front pad disposed along the front and partially along the sides of the slider and a rear pad partially disposed along the rear of the slider, wherein a skewed center rail connects the front pad to the rear pad. Extending above the rear pad is a V-shaped ABS pad and extending above the front pad are two leading edge ABS pads that are separated by a channel towards the longitudinal center of the slider. The design enables the slider to fly much higher over the landing zone of the disk than at the data zone and provides for a steep take off profile followed by a rapid descend over the data zone.

摘要翻译： 双蚀刻深度滑动器空气轴承表面包括沿着前部设置并部分沿着滑块的侧面的前垫，以及沿着滑块的后部部分地设置的后垫，其中倾斜的中心轨将前垫连接到后垫 。 在后垫上方延伸的是V形ABS垫，并且在前垫上方延伸的两个前缘ABS垫片由通道朝向滑块的纵向中心分开。 该设计使得滑块在盘的着陆区域比在数据区域飞得更高，并提供了一个陡峭的起飞档案，随后在数据区域迅速下降。