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1. 发明申请

US20080297938A1 Erase band compensated offset servo trimming 失效
标题翻译：擦除波段补偿偏移伺服微调
公开(公告)号：US20080297938A1
公开(公告)日：2008-12-04
申请号：US11810188
申请日：2007-06-04
申请人： Peng Luo , Keung Youn Cho , Hao Ping Wen , Shuyu Sun
发明人： Peng Luo , Keung Youn Cho , Hao Ping Wen , Shuyu Sun
IPC分类号： G11B21/02
CPC分类号： G11B5/59655
摘要： A hard disk drive with a disk that has a servo field with an A servo burst and a B servo burst. The A servo burst has a trimmed erase band. The trimmed erase band can be created by offsetting the write head relative to a burst centerline to reduce the width of the erase band. For example, the write head can be moved toward a centerline of the A servo burst. The offset can be a function of write current and cylinder location of the disk. The offsets are selected so that the resultant burst profiles do not contain a flat minimum portion.
摘要翻译：具有磁盘的硬盘驱动器具有A伺服突发和B伺服突发的伺服字段。 A伺服脉冲串具有修整的擦除带。可以通过相对于突发中心线偏移写入头来减少擦除频带的宽度来创建修整的擦除带。例如，写入头可以朝向A伺服突发的中心线移动。偏移量可以是磁盘写入电流和气缸位置的函数。选择偏移量使得合成的脉冲串分布不包含平坦的最小部分。

2. 发明授权

US07535667B2 Erase band compensated offset servo trimming 失效
标题翻译：擦除波段补偿偏移伺服微调
公开(公告)号：US07535667B2
公开(公告)日：2009-05-19
申请号：US11810188
申请日：2007-06-04
申请人： Peng Luo , Keung Youn Cho , Hao Ping Wen , Shuyu Sun
发明人： Peng Luo , Keung Youn Cho , Hao Ping Wen , Shuyu Sun
IPC分类号： G11B21/02
CPC分类号： G11B5/59655
摘要： A hard disk drive with a disk that has a servo field with an A servo burst and a B servo burst. The A servo burst has a trimmed erase band. The trimmed erase band can be created by offsetting the write head relative to a burst centerline to reduce the width of the erase band. For example, the write head can be moved toward a centerline of the A servo burst. The offset can be a function of write current and cylinder location of the disk. The offsets are selected so that the resultant burst profiles do not contain a flat minimum portion.
摘要翻译：具有磁盘的硬盘驱动器具有A伺服突发和B伺服突发的伺服字段。 A伺服脉冲串具有修整的擦除带。可以通过相对于突发中心线偏移写入头来减少擦除频带的宽度来创建修整的擦除带。例如，写入头可以朝向A伺服突发的中心线移动。偏移量可以是磁盘写入电流和气缸位置的函数。选择偏移量使得合成的脉冲串分布不包含平坦的最小部分。

3. 发明授权

US07869161B2 Dual write gap perpendicular recording head with a non-magnetic backside shield 失效
标题翻译：双写间隙垂直记录头带非磁性背面屏蔽
公开(公告)号：US07869161B2
公开(公告)日：2011-01-11
申请号：US11810339
申请日：2007-06-04
申请人： Peng Luo , Keung Youn Cho , Shuyu Sun
发明人： Peng Luo , Keung Youn Cho , Shuyu Sun
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/3163
摘要： A perpendicular recording head for a hard disk drive. The head includes a non-magnetic backside shield that minimizes or eliminates the flow of backside flux through the head. The head can be fabricated by forming a non-magnetic backside shield layer on a main pole. Portions of the backside shield and main pole can be removed to form a tapered pole portion. A non-magnetic write-gap layer and write shield are then formed onto the backside shield and main pole.
摘要翻译：用于硬盘驱动器的垂直记录头。头部包括非磁性后挡板，其最小化或消除通过头部的背侧通量的流动。可以通过在主极上形成非磁性背面屏蔽层来制造头部。可以去除背面屏蔽和主极的部分以形成锥形极部。然后在背面屏蔽和主极上形成非磁性写间隙层和写入屏蔽。

4. 发明申请

US20080297946A1 Dual write gap perpendicular recording head 失效
标题翻译：双写间隙垂直记录头
公开(公告)号：US20080297946A1
公开(公告)日：2008-12-04
申请号：US11810339
申请日：2007-06-04
申请人： Peng Luo , Keung Youn Cho , Shuyu Sun
发明人： Peng Luo , Keung Youn Cho , Shuyu Sun
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/3163
摘要： A perpendicular recording head for a hard disk drive. The head includes a non-magnetic backside shield that minimizes or eliminates the flow of backside flux through the head. The head can be fabricated by forming a non-magnetic backside shield layer on a main pole. Portions of the backside shield and main pole can be removed to form a tapered pole portion. A non-magnetic write-gap layer and write shield are then formed onto the backside shield and main pole.
摘要翻译：用于硬盘驱动器的垂直记录头。头部包括非磁性后挡板，其最小化或消除通过头部的背侧通量的流动。可以通过在主极上形成非磁性背面屏蔽层来制造头部。可以去除背面屏蔽和主极的部分以形成锥形极部。然后在背面屏蔽和主极上形成非磁性写间隙层和写入屏蔽。

5. 发明授权

US07253978B2 Methods and apparatus determining and/or using overshoot control of write current for optimized head write control in assembled disk drives 失效
标题翻译：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
公开(公告)号：US07253978B2
公开(公告)日：2007-08-07
申请号：US11176414
申请日：2005-07-06
申请人： Hae Jung Lee , Sang Lee , Keung Youn Cho
发明人： Hae Jung Lee , Sang Lee , Keung Youn Cho
IPC分类号： G11B27/36
CPC分类号： G11B5/455 , G11B2005/0008
摘要： 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.
摘要翻译：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。

6. 发明申请

US20090151434A1 Apparatus and method using a disk drive slider and/or a peltier plate in an atomic force microscope 审中-公开
标题翻译：在原子力显微镜中使用盘驱动器滑块和/或珀耳帖板的装置和方法
公开(公告)号：US20090151434A1
公开(公告)日：2009-06-18
申请号：US12002631
申请日：2007-12-17
申请人： Dongman Kim , Michael Sullivan , Keung Youn Cho
发明人： Dongman Kim , Michael Sullivan , Keung Youn Cho
IPC分类号： G01B5/28
CPC分类号： G01Q40/02 , G01Q30/10 , G01Q60/26 , G01Q60/28
摘要： An Atomic Force Microscope (AFM) using a cantilevered probe containing a slider of a kind useable in a disk drive. The AFM may use a test surface similar to a disk surface in the disk drive and measure friction, lubricant depletion, and/or scratch test in the AFM to estimate the same under conditions experienced in the disk drive. The AFM may also include a Peltier plate thermally coupled to test object to maintain test surface at controlled test temperature. Refinements of the measurements are disclosed.
摘要翻译：原子力显微镜（AFM）使用悬臂探头，其中包含一种可用于磁盘驱动器的滑块。 AFM可以使用类似于磁盘驱动器中的磁盘表面的测试表面，并测量AFM中的摩擦，润滑剂耗尽和/或刮擦测试，以在磁盘驱动器中经历的条件下估计相同的值。 AFM还可以包括热耦合到测试对象的帕尔贴板，以将测试表面维持在受控的测试温度。公开了测量的改进。

7. 发明授权

US06556006B1 Method for magneto-resistive head electrostatic popping detection 失效
标题翻译：磁阻头静电爆破检测方法
公开(公告)号：US06556006B1
公开(公告)日：2003-04-29
申请号：US09990631
申请日：2001-11-21
申请人： Zhaohui Li , Andrew Kao , Keung Youn Cho
发明人： Zhaohui Li , Andrew Kao , Keung Youn Cho
IPC分类号： G01R3312
CPC分类号： G11B5/455 , G11B5/012 , G11B20/24 , G11B2005/0016
摘要： A method and system for detecting electrostatic noise in a magneto-resistive head which may be caused by a plurality of conditions manifesting in the frequency domain as either an amplitude spike or an unstable baseline. In one embodiment, the signals generated by the head when reading a DC-erased track are compared. When viewed in the frequency domain the spectrum gap between the signals is used to determine if the head being tested suffers from defects causing an unstable baseline or from defects causing an amplitude spike.
摘要翻译：一种用于检测磁阻头中的静电噪声的方法和系统，其可以由在频域中表现为幅度尖峰或不稳定基线的多个条件引起。在一个实施例中，比较读取DC擦除磁道时由磁头产生的信号。当在频域中观察时，信号之间的频谱间隙用于确定被测头是否遭受导致不稳定基线的缺陷或导致幅度尖峰的缺陷。

8. 发明授权

US07089649B2 Method of estimating a thermal pole tip protrusion for a head gimbal assembly 失效
标题翻译：估计头部万向节组件的热极尖突起的方法
公开(公告)号：US07089649B2
公开(公告)日：2006-08-15
申请号：US10256553
申请日：2002-09-26
申请人： Geng Wang , Hae Jung Lee , Keung Youn Cho , Sang Lee
发明人： Geng Wang , Hae Jung Lee , Keung Youn Cho , Sang Lee
IPC分类号： G11B5/127 , H04R31/00
CPC分类号： G11B5/3136 , G11B5/012 , G11B5/455 , G11B5/4806 , G11B5/4833 , G11B5/484 , Y10T29/49025 , Y10T29/49027 , Y10T29/49028 , Y10T29/49032 , Y10T29/49036
摘要： 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.
摘要翻译：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。

9. 发明申请

US20100149677A1 SELF-SPINNING DISK BULK ERASURE FOR HARD DISK ASSEMBLY 有权
标题翻译：用于硬盘组件的自旋盘驱动器
公开(公告)号：US20100149677A1
公开(公告)日：2010-06-17
申请号：US12335822
申请日：2008-12-16
申请人： Carl Xiaodong Che , Keung Youn Cho , Soo-Youl Hong , Shuo-Hao Chen
发明人： Carl Xiaodong Che , Keung Youn Cho , Soo-Youl Hong , Shuo-Hao Chen
IPC分类号： G11B5/03
CPC分类号： G11B5/0245
摘要： A method for erasing a disk of a hard disk drive. The method includes moving the hard disk drive adjacent to an erasure head that emanates a magnetic field. The magnetic field and moving hard disk drive cause a disk of the hard disk drive to spin under a Lorentz force created by the magnetic field and moving disk. The magnetic field is applied by the erasure head for a duration that causes erasure of the entire disk. The spindle motor is not activated during the entire process. Not activating the spindle motor eliminates any Faraday coupling from the erasure head into the motor.
摘要翻译：一种擦除硬盘驱动器的磁盘的方法。该方法包括移动与发出磁场的擦除头相邻的硬盘驱动器。磁场和移动的硬盘驱动器使得硬盘驱动器的磁盘以由磁场和移动盘产生的洛伦兹力驱动。通过擦除头施加磁场持续一段时间，导致整个磁盘的擦除。主轴电机在整个过程中未被激活。不激活主轴电机消除了从擦除头到电机的任何法拉第耦合。

10. 发明授权

US06477012B1 Flying negative pressure air bearing slider with dual negative pressure pockets and side transducer 失效
标题翻译：飞行负压空气轴承滑块带双负压口袋和侧传感器
公开(公告)号：US06477012B1
公开(公告)日：2002-11-05
申请号：US09489015
申请日：2000-01-21
申请人： Ki-Ook Park , Keung Youn Cho
发明人： Ki-Ook Park , Keung Youn Cho
IPC分类号： G11B560
CPC分类号： G11B5/6005
摘要： An air bearing slider that flies above a surface of a recording disk during relative rotation of the recording disk. A plurality of projections extend along the side of the slider body, and a plurality of negative pressure air cavities are formed between the projections. The projections act as pneumatic bearings, creating supporting positive forces for supporting the slider. The negative pressure air cavities create negative forces for pulling the slider down. The positive and negative forces on the center of mass of the slider are balanced to provide a more stable, static, and dynamic flying attitude for the slider. The resulting pressure profile of the slider has high pressure near the leading end, relatively low pressure in the middle, and relatively high pressure near the trailing end. This ensures minimum spacing between the slider and the disk that is very insensitive to roll parameters.
摘要翻译：在记录盘的相对旋转期间，空气轴承滑块在记录盘的表面上方飞行。多个突起沿着滑块体的侧面延伸，并且在突起之间形成多个负压空气腔。突起作为气动轴承，产生用于支撑滑块的支撑力。负压空气腔向下拉动滑块产生负力。滑块质量中心的正负力是平衡的，为滑块提供更稳定，静态和动态的飞行姿态。所得到的滑块的压力分布在前端附近具有高压力，中间的压力相对较低，靠近尾端的压力相对较高。这确保滑块和磁盘之间的最小间距对辊参数非常不敏感。

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