公开(公告)号：US08736996B2

公开(公告)日：2014-05-27

申请号：US13475787

申请日：2012-05-18

申请人： Xiaodong Che ,  Weldon Mark Hanson

发明人： Xiaodong Che ,  Weldon Mark Hanson

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

CPC分类号： G11B27/36 ,  G11B5/6029 ,  G11B5/607 ,  G11B5/6076 ,  G11B20/10305

摘要： A method, apparatus, and system for implementing channel signal processing assist with an embedded contact sensor (ECS) in hard disk drives. An ECS signal is captured during write and idle operation of the hard disk drive. A read channel monitors changes in the ECS signal providing a clearance monitor function for insuring write integrity.

摘要翻译： 用于实现信道信号处理的方法，装置和系统有助于硬盘驱动器中的嵌入式接触传感器（ECS）。 在硬盘驱动器的写入和空闲操作期间捕获ECS信号。 读通道监视ECS信号的变化，提供清除监视功能，以确保写入完整性。

公开(公告)号：US08537496B2

公开(公告)日：2013-09-17

申请号：US12844736

申请日：2010-07-27

申请人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

发明人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

IPC分类号： G11B5/11

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/315

摘要： A perpendicular magnetic write head having improved Bit Error Rate (BER), Adjacent Track Interference (ATI) and Far Track Interference (FTI). The write head includes a write pole and a trailing wrap-around magnetic shield. A permanent magnetic is located at either outer side of the shield. These magnets are magnetized to have magnetizations that are oriented in the same direction, in a direction that is perpendicular to the track direction and parallel with the air bearing surface.

摘要翻译： 具有改进的误码率（BER），相邻轨道干扰（ATI）和远距离干扰（FTI））的垂直磁性写入头。 写头包括一个写入磁极和一个后围环绕磁屏蔽。 永久磁铁位于屏蔽​​的外侧。 这些磁体被磁化以具有在垂直于轨道方向并平行于空气轴承表面的方向上沿相同方向定向的磁化。

公开(公告)号：US20120026628A1

公开(公告)日：2012-02-02

申请号：US12844736

申请日：2010-07-27

申请人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

发明人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

IPC分类号： G11B5/17 ,  G11B5/48

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/315

摘要： A perpendicular magnetic write head having improved Bit Error Rate (BER), Adjacent Track Interference (ATI) and Far Track Interference (FTI). The write head includes a write pole and a trailing wrap-around magnetic shield. A permanent magnetic is located at either outer side of the shield. These magnets are magnetized to have magnetizations that are oriented in the same direction, in a direction that is perpendicular to the track direction and parallel with the air bearing surface.

摘要翻译： 具有改进的误码率（BER），相邻轨道干扰（ATI）和远距离干扰（FTI））的垂直磁性写入头。 写头包括一个写入磁极和一个后围环绕磁屏蔽。 永久磁铁位于屏蔽​​的外侧。 这些磁体被磁化以具有在垂直于轨道方向并平行于空气轴承表面的方向上沿相同方向定向的磁化。

公开(公告)号：US20080158705A1

公开(公告)日：2008-07-03

申请号：US11648368

申请日：2006-12-28

申请人： Xiaodong Che ,  Wen-chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

发明人： Xiaodong Che ,  Wen-chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

IPC分类号： G11B27/36

CPC分类号： G11B27/36 ,  G11B5/3196 ,  G11B5/455 ,  G11B2220/2516

摘要： A write head tester is disclosed. The write head tester includes a rotatably coupled magnetic media having a stand-off thereover. In addition, a write head holder is fixedly coupled with the tester. The write head holder receives and electrically couples a removably coupleable write head such that the removably coupleable write head is capable of performing a write on the magnetic media. A read head is also fixedly coupled with the tester. The read head is utilized for performing a read on the magnetic media. Furthermore, an evaluator is provided for accessing a result of the read on the magnetic media and evaluating the removably coupleable write head based on the read.

摘要翻译： 公开了一种写入头测试器。 写入头测试器包括一个可旋转耦合的磁性介质，其中有一个支架。 此外，写头保持架与测试仪固定连接。 写头保持器接收并电耦合可移除地可耦合的写入头，使得可移除地可耦合的写入头能够对磁性介质执行写入。 读头也与测试仪固定连接。 读取头用于对磁性介质进行读取。 此外，提供评估器用于访问磁介质上的读取结果并基于读取来评估可拆卸地耦合的写入头。

公开(公告)号：US07133241B2

公开(公告)日：2006-11-07

申请号：US11104209

申请日：2005-04-11

申请人： Xiaodong Che ,  Wen-Chien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Wei-san Yuan

发明人： Xiaodong Che ,  Wen-Chien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Wei-san Yuan

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/012 ,  G11B2005/001

摘要： A method and apparatus for optimizing data record quality on a disk for a pair of read and write heads, in which the write head is bigger, by adaptively varying linear and track density of overlapping recorded tracks to achieve a target storage capacity. In the method, target storage capacity and radial writing direction are selected. Read and write widths of heads are determined. A linear density and offset distance pairing for optimizing record quality at target storage capacity is determined, wherein offset distance is less than write width but greater than read width. The write head writes a track at the linear density, is offset in the radial direction by the offset distance, and the offset distance is stored. The write head writes a new track at the linear density. Offsetting, storing offset, and writing a new track are repeated until desired data is written into a cluster.

摘要翻译： 一种用于通过自适应地改变重叠记录轨道的线性和轨道密度以实现目标存储容量来优化写头的一对读写头的盘上的数据记录质量的方法和装置。 在该方法中，选择目标存储容量和径向写入方向。 磁头读写宽度确定。 确定用于优化目标存储容量的记录质量的线性密度和偏移距离配对，其中偏移距离小于写入宽度但大于读取宽度。 写入头以线性密度写入轨迹，在径向上偏移偏移距离，并存储偏移距离。 写头以线性密度写入新的轨迹。 重复偏移，存储偏移和写入新轨道，直到所需数据写入群集。

公开(公告)号：US20110128646A1

公开(公告)日：2011-06-02

申请号：US12629437

申请日：2009-12-02

申请人： Michael Alex ,  Xiaodong Che ,  Zhen Jin ,  Michael Paul Salo

发明人： Michael Alex ,  Xiaodong Che ,  Zhen Jin ,  Michael Paul Salo

IPC分类号： G11B21/02

CPC分类号： G11B19/041 ,  G11B5/02 ,  G11B20/10009 ,  G11B20/10398 ,  G11B2005/001 ,  G11B2020/10898 ,  G11B2220/2516

摘要： A hard disk drive (HDD) including a magnetic disk, the magnetic disk including a data track. The HDD also includes a synchronized rewrite controller for synchronizing a plurality of rewrites of a data pattern on a location of the track of the magnetic disk and the HDD includes a write head controlled by the synchronized rewrite controller for writing the data pattern on the location of the data track and rewriting the data pattern a plurality of times on the location in synchronization with a prior writing of the data pattern on the data track.

摘要翻译： 包括磁盘的硬盘驱动器（HDD），磁盘包括数据磁道。 HDD还包括同步重写控制器，用于在磁盘的轨道的位置上同步数据模式的多个重写，并且HDD包括由同步重写控制器控制的写入头，用于将数据模式写入到 数据跟踪数据跟踪并重写数据模式多次在位置上与数据轨迹上的数据模式的先前写入同步。

公开(公告)号：US07420759B2

公开(公告)日：2008-09-02

申请号：US11591745

申请日：2006-10-31

申请人： Xiaodong Che

发明人： Xiaodong Che

IPC分类号： G11B27/36

CPC分类号： G11B20/10009 ,  G11B2220/2516

摘要： Method calibrates an assembled hard disk drive for read head accessing rotating disk surface, by estimating non-linearity of that playback device based on two data patterns, which have a short transition-pair waveform and a long transition-pair waveform. By linearly constructing a simulated long transition-pair waveform from the short transition-pair waveform and aligning it with the long transition-pair waveform, non-linear distortion is estimated, creating the transfer curve as product of this process. The transfer curve is used to compensate the read data of a track to create the adjusted read data, which is used to decode the track being read. The adjusted read data is the product of this process. The hard disk drive including the transfer table. Second method using transfer table to create adjusted read data for track, the processor, embedded circuit and hard disk drive implementing this method. Manufacturing embedded circuit as product.

公开(公告)号：US20070223128A1

公开(公告)日：2007-09-27

申请号：US11389827

申请日：2006-03-27

申请人： Xiaodong Che

发明人： Xiaodong Che

IPC分类号： G11B15/04 ,  G11B27/36 ,  G11B19/02

CPC分类号： G11B33/1493 ,  G11B19/04

摘要： A disk drive that protects stored data from stray magnetic fields is disclosed. Sensors for sensing stray magnetic fields are mounted to the base and/or cover of the drive and aligned with the trajectory of the movement of the read/write head. If the sensors, which have memory such as a toggle switch, are exposed to a high stray magnetic field, operation of the drive is suspended until a follow-up algorithm or protocol is implemented. The sensors can sense specific direction of stray fields. The sensor can change resistance if a high stray field is detected. The information in the sensors is collected and processed by the drive controller.

摘要翻译： 公开了一种保护存储的数据免受杂散磁场的磁盘驱动器。 用于感测杂散磁场的传感器安装到驱动器的底座和/或盖上，并与读/写头的移动轨迹对准。 如果具有诸如拨动开关的存储器的传感器暴露于高杂散磁场，则驱动器的操作被暂停，直到实现后续算法或协议。 传感器可以感测杂散场的特定方向。 如果检测到高杂散场，传感器可以改变电阻。 传感器中的信息由驱动控制器收集和处理。

公开(公告)号：US07131346B1

公开(公告)日：2006-11-07

申请号：US10966543

申请日：2004-10-15

申请人： Jagdeep S. Buttar ,  David Terrill ,  Kenneth R. Davies ,  Herman Ferrier ,  Xiaodong Che

发明人： Jagdeep S. Buttar ,  David Terrill ,  Kenneth R. Davies ,  Herman Ferrier ,  Xiaodong Che

IPC分类号： G11B5/56 ,  G01R33/12

CPC分类号： G11B5/455 ,  G11B5/4555 ,  G11B5/5552 ,  G11B27/36

摘要： Head stack fixtures for securing head stack assemblies to spin stand testing systems, and spin stand testing systems incorporating such fixtures, are disclosed. Exemplary head stack fixtures comprise a base supporting a piezoelectric actuator. The base includes an attachment mechanism for securing the HSA in such a way that the HSA will pivot relative to the base. When the HSA is secured to the base, the piezoelectric actuator engages the HSA. The piezoelectric actuator is therefore able to pivot the HSA relative to the base for fine positioning of a head of the HSA.

摘要翻译： 公开了用于固定头部堆叠组件以旋转支架测试系统的头部堆叠固定装置，以及包括这种固定装置的旋转支架测试系统。 示例性的顶部堆叠固定装置包括支撑压电致动器的基座。 底座包括用于固定HSA的附接机构，使得HSA将相对于底座枢转。 当HSA固定在基座上时，压电执行机构接合HSA。 因此，压电致动器能够相对于基座枢转HSA，以精确定位HSA的头部。

公开(公告)号：US5583705A

公开(公告)日：1996-12-10

申请号：US560084

申请日：1995-11-17

申请人： Pablo A. Ziperovich ,  Xiaodong Che

发明人： Pablo A. Ziperovich ,  Xiaodong Che

IPC分类号： G11B5/09 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/36

CPC分类号： G11B20/10194 ,  G11B20/10055 ,  G11B27/36 ,  G11B20/1258

摘要： Write precomposition optimization for a partial response maximum likelihood ("PRME") magnetic recording chapel adapted to a mass production environment. Optimal write precompensation may be determined by writing a tribit data pattern known to produce worst case nonlinear transition shift ("NLTS") onto a magnetic recording medium; reading back the recorded data pattern; and calculating the mean-squared error ("MSE") for one or more of the equalized data sample levels associated with the PRML channel to be optimized. The writing and reading back process is repeated with varying amounts of precompensation applied to the written pattern. The optimal amount of write precompensation is determined eider by minimizing the MSE for a selected sample level or by minimizing MSE between the middle and the upper or lower of the ternary PRML sample levels.

摘要翻译： 为适应于大规模生产环境的部分响应最大似然（“PRME”）磁记录教堂编写预组合优化。 可以通过将已知产生最坏情况非线性转变位移（“NLTS”）的三位数据模式写入到磁记录介质上来确定最佳写预补偿; 读回记录数据模式; 以及计算与要优化的PRML信道相关联的一个或多个均衡数据样本水平的均方误差（“MSE”）。 重复写入和回读过程，并对写入的图案应用不同量的预补偿。 通过最小化所选样本级别的MSE或通过使三进制PRML样本级别的中间和更高或更低之间的MSE最小化来确定写入预补偿的最佳量。