公开(公告)号：US20110149706A1

公开(公告)日：2011-06-23

申请号：US12646831

申请日：2009-12-23

申请人： Shanlin Duan ,  Jizhong He ,  John S. Hopkins ,  Kenneth E. Johnson

发明人： Shanlin Duan ,  Jizhong He ,  John S. Hopkins ,  Kenneth E. Johnson

IPC分类号： G11B20/18 ,  G11B5/02

CPC分类号： G11B5/40 ,  G11B5/8404 ,  G11B20/10203 ,  G11B20/1816 ,  G11B27/36 ,  G11B2220/2516

摘要： A tool for testing a magnetic disk for use in a magnetic disk drive. The tool detects surface defects or asperities by detecting a change in electrical resistance corresponding to a temperature change in a thermally sensitive layer. The apparatus includes a slider body having a thermally insulating layer formed on an air bearing surface of the slider body and a thermal sensor layer formed on the thermally insulating layer. The thermally insulating layer prevents thermal heat spikes in the thermal sensor layer (such as resulting from contact with an asperity) from dissipating quickly into the slider body itself. The thermal sensor layer is a material that exhibits a change in electrical resistance in response to a change in temperature and is preferably a PTC thermistor material which exhibits a large change in electrical resistance when a transition temperature has been reached.

摘要翻译： 用于测试用于磁盘驱动器的磁盘的工具。 该工具通过检测对应于热敏层的温度变化的电阻变化来检测表面缺陷或粗糙度。 该装置包括：滑动体，其具有形成在滑块体的空气轴承表面上的绝热层和形成在绝热层上的热传感器层。 隔热层防止热传感器层中的热热尖峰（例如由于与粗糙度的接触而导致的））快速消散到滑块体本身。 热传感器层是响应于温度变化而呈现电阻变化的材料，优选是当达到转变温度时电阻变化很大的PTC热敏电阻材料。

公开(公告)号：US08618793B2

公开(公告)日：2013-12-31

申请号：US12646831

申请日：2009-12-23

申请人： Shanlin Duan ,  Jizhong He ,  John S. Hopkins ,  Kenneth E. Johnson

发明人： Shanlin Duan ,  Jizhong He ,  John S. Hopkins ,  Kenneth E. Johnson

IPC分类号： G01R33/12 ,  G11B27/36 ,  G11B5/33

CPC分类号： G11B5/40 ,  G11B5/8404 ,  G11B20/10203 ,  G11B20/1816 ,  G11B27/36 ,  G11B2220/2516

摘要： A tool for testing a magnetic disk for use in a magnetic disk drive. The tool detects surface defects or asperities by detecting a change in electrical resistance corresponding to a temperature change in a thermally sensitive layer. The apparatus includes a slider body having a thermally insulating layer formed on an air bearing surface of the slider body and a thermal sensor layer formed on the thermally insulating layer. The thermally insulating layer prevents thermal heat spikes in the thermal sensor layer (such as resulting from contact with an asperity) from dissipating quickly into the slider body itself. The thermal sensor layer is a material that exhibits a change in electrical resistance in response to a change in temperature and is preferably a PTC thermistor material which exhibits a large change in electrical resistance when a transition temperature has been reached.

摘要翻译： 用于测试用于磁盘驱动器的磁盘的工具。 该工具通过检测对应于热敏层的温度变化的电阻变化来检测表面缺陷或粗糙度。 该装置包括：滑动体，其具有形成在滑块体的空气轴承表面上的绝热层和形成在绝热层上的热传感器层。 隔热层防止热传感器层中的热热尖峰（例如由于与粗糙度的接触而导致的））快速消散到滑块体本身。 热传感器层是响应于温度变化而呈现电阻变化的材料，优选是当达到转变温度时电阻变化很大的PTC热敏电阻材料。

公开(公告)号：US07724462B2

公开(公告)日：2010-05-25

申请号：US12184300

申请日：2008-08-01

申请人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

发明人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/6005

摘要： A method models and calibrates the fly height of a slider above the disk for disk drives. The calibration scheme uses the Wallace spacing loss equation and laser doppler velocimetry to predict fly height and detect the actual fly height of the slider. The slider is vibrated at selected resonances, such as by capacitive coupling to the disk, and the fly height is gradually reduced. In one version, contact between the slider and disk may be detected using an arm electronics sensor. The amplitude of mean-to-peak, vibration detection is used as an indication of the actual fly height and to calibrate the modeled fly height.

摘要翻译： 一种方法建模和校准磁盘驱动器磁盘上方的浮动高度。 校准方案使用华莱士间距损失方程和激光多普勒测速来预测飞行高度并检测滑块的实际飞行高度。 滑块以所选择的谐振振动，例如通过电容耦合到盘，并且飞行高度逐渐减小。 在一个版本中，可以使用臂电子传感器来检测滑块和盘之间的接触。 使用平均峰值振幅检测的幅度作为实际飞行高度的指示，并校准建模的飞行高度。

公开(公告)号：US20070024276A1

公开(公告)日：2007-02-01

申请号：US11189594

申请日：2005-07-26

申请人： Shanlin Duan ,  Jizhong He ,  Zhupei Shi ,  Jane Zhang

发明人： Shanlin Duan ,  Jizhong He ,  Zhupei Shi ,  Jane Zhang

IPC分类号： G01R33/12 ,  G01V3/00

CPC分类号： G01R33/1207 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/4555 ,  G11B2005/001 ,  G11B2005/0021

摘要： A magnetic test module runs on a spin stand to detect amplitude decay and noise evolution at the same time. Signal-to-noise ratio (SNR) decay is directly measured. The recording performance is correlated better with SNR instead of signal only. The thermal stability of the system is evaluated more accurately with this SNR decay method. A heater is placed under the media disk, and a remote sensing thermometer and temperature controller form a subsystem to set up desired environmental temperature. The heater creates a heated band and the read/write head flies above the heated band. The temperature control system may be removed when SNR decay measurement is performed under room temperature.

摘要翻译： 磁性测试模块在旋转架上运行，以同时检测振幅衰减和噪声演变。 直接测量信噪比（SNR）衰减。 记录性能与SNR而不是仅信号相关性更好。 采用这种SNR衰减方法，更准确地评估了系统的热稳定性。 将加热器放置在介质盘下方，并且遥感温度计和温度控制器形成子系统以建立所需的环境温度。 加热器产生加热带，读/写头飞过加热带。 当在室温下进行SNR衰减测量时，可以去除温度控制系统。

公开(公告)号：US07946156B2

公开(公告)日：2011-05-24

申请号：US11964688

申请日：2007-12-26

申请人： Shanlin Duan ,  Jizhong He ,  Bruno Marchon ,  Ullal V. Nayak

发明人： Shanlin Duan ,  Jizhong He ,  Bruno Marchon ,  Ullal V. Nayak

IPC分类号： G11B5/455 ,  G01B7/34 ,  G01B5/28

CPC分类号： G11B5/455 ,  G11B5/3136

摘要： Glide test systems and associated methods are described. A glide test system includes a glide test head that is flown over the surface of a recording disk to detect asperities on the recording disk. The glide test head includes a detection pad on the trailing end of the head. Heating elements are fabricated proximate to the detection pad. The heating elements are independently controllable to control the amount of protrusion of different regions of the detection pad. The heating elements thus provide a way to substantially flatten the detection surface of the detection pad, and compensate for an uneven topography on a detection surface.

摘要翻译： 描述了滑翔测试系统和相关方法。 滑行测试系统包括滑动测试头，其在记录盘的表面上流动以检测记录盘上的凹凸。 滑行测试头包括头部尾端上的检测垫。 在检测板附近制造加热元件。 加热元件可独立控制，以控制检测垫的不同区域的突出量。 因此，加热元件提供了使检测焊盘的检测表面基本平坦化并且补偿检测表面上不均匀的形貌的方法。

公开(公告)号：US20080137225A1

公开(公告)日：2008-06-12

申请号：US11609811

申请日：2006-12-12

申请人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins

发明人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins

IPC分类号： G11B21/02

CPC分类号： G11B5/6058 ,  G11B5/5534 ,  G11B5/6052 ,  G11B5/6076

摘要： An apparatus, system, and method are disclosed for fly height detection. The apparatus includes an actuator configured to induce vibrations in a glide head that is configured to detect physical asperities on a disk surface. The apparatus may also include a second end of the suspension arm coupled with the glide head and a sensor module that is configured to communicate with a control module in response to the glide head coming in contact with at least one physical asperity. The system includes the apparatus, a disk having a surface comprising physical asperities, and a head gimbal assembly configured to calibrate a fly height margin for the disk. The method includes inducing vibrations in a glide head, detecting physical asperities on a disk surface, and communicating with a control module in response to the glide head coming in contact with at least one physical asperity.

摘要翻译： 公开了用于飞行高度检测的装置，系统和方法。 该装置包括致动器，其构造成在滑动头中引起被配置为检测盘表面上的物理粗糙度的振动。 该装置还可以包括悬挂臂的与滑行头连接的第二端和传感器模块，该传感器模块被配置成响应于滑动头与至少一个物理凹凸接触而与控制模块通信。 该系统包括装置，具有包括物理粗糙度的表面的盘以及被配置为校准盘的飞行高度余量的头部万向节组件。 该方法包括在滑动头部引起振动，检测盘表面上的物理粗糙度，以及响应于滑动头与至少一个物理粗糙度接触而与控制模块通信。

公开(公告)号：US07173415B1

公开(公告)日：2007-02-06

申请号：US11189594

申请日：2005-07-26

申请人： Shanlin Duan ,  Jizhong He ,  Zhupei Shi ,  Jane Jie Zhang

发明人： Shanlin Duan ,  Jizhong He ,  Zhupei Shi ,  Jane Jie Zhang

IPC分类号： G01R33/12

CPC分类号： G01R33/1207 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/4555 ,  G11B2005/001 ,  G11B2005/0021

摘要： A magnetic test module runs on a spin stand to detect amplitude decay and noise evolution at the same time. Signal-to-noise ratio (SNR) decay is directly measured. The recording performance is correlated better with SNR instead of signal only. The thermal stability of the system is evaluated more accurately with this SNR decay method. A heater is placed under the media disk, and a remote sensing thermometer and temperature controller form a subsystem to set up desired environmental temperature. The heater creates a heated band and the read/write head flies above the heated band. The temperature control system may be removed when SNR decay measurement is performed under room temperature.

摘要翻译： 磁性测试模块在旋转架上运行，以同时检测振幅衰减和噪声演变。 直接测量信噪比（SNR）衰减。 记录性能与SNR而不是仅信号相关性更好。 采用这种SNR衰减方法，更准确地评估了系统的热稳定性。 将加热器放置在介质盘下方，并且遥感温度计和温度控制器形成子系统以建立所需的环境温度。 加热器产生加热带，读/写头飞过加热带。 当在室温下进行SNR衰减测量时，可以去除温度控制系统。

公开(公告)号：US20120113538A1

公开(公告)日：2012-05-10

申请号：US12941482

申请日：2010-11-08

申请人： Kezhao Zhang ,  Jizhong He ,  Shanlin Duan ,  Jane Jie Zhang ,  Zhupei Shi

发明人： Kezhao Zhang ,  Jizhong He ,  Shanlin Duan ,  Jane Jie Zhang ,  Zhupei Shi

IPC分类号： G11B27/36

CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B5/743 ,  G11B2220/2516

摘要： Approaches for a testing device for selecting a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). The testing device comprises a continuous magnetic-recording disk, rotatably mounted on a spindle, which stores data using a continuous media format. The testing device also comprises a testing module configured to simulate reading data, stored using a discrete track media (DTM) format, from the continuous magnetic-recording medium. Advantageously, testing time and cost is reduced as both discrete track media (DTM) disks and expensive discrete track media (DTM) recording testing hardware are not required to select the optimal a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). In addition, embodiments may be used to optimize features of the tracks of the DTM disk, such as the land to groove ratio.

摘要翻译： 用于选择与硬盘驱动器（HDD）的特定头部一起使用的离散轨道介质（DTM）格式的测试设备的方法。 测试装置包括可旋转地安装在主轴上的连续磁记录盘，其使用连续的媒体格式存储数据。 测试装置还包括被配置成模拟从连续磁记录介质中使用离散轨道介质（DTM）格式存储的读取数据的测试模块。 有利的是，测试时间和成本被降低，因为不需要离散轨道介质（DTM）盘和昂贵的离散轨道介质（DTM）记录测试硬件来选择最佳的离散轨道介质（DTM）格式，以用于特定的头 硬盘驱动器（HDD）。 此外，可以使用实施例来优化DTM盘的轨道的特征，例如陆地与凹槽之比。

公开(公告)号：US20110026167A1

公开(公告)日：2011-02-03

申请号：US12511840

申请日：2009-07-29

申请人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins

发明人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins

IPC分类号： G11B5/48

CPC分类号： G11B5/6005 ,  G11B5/102 ,  G11B5/40

摘要： Reducing slider bounce within a hard disk drive. A force is received at a first material while the first material is in contact with a disk of a hard disk drive; the first material comprising a portion that is flexible in a first direction and is substantially non-flexible in a second direction. The first direction is a direction that is normal to the disk and the second direction is a direction that is parallel to a surface of the disk. The force is substantially absorbed by the portion that is flexible to reduce the force associated with interaction between the first material and the disk, thereby reducing slider bounce within the hard disk drive

摘要翻译： 减少滑块在硬盘驱动器内弹起。 当第一材料与硬盘驱动器的盘接触时，在第一材料处接收力; 所述第一材料包括在第一方向上是柔性的并且在第二方向上基本上不柔性的部分。 第一方向是与盘垂直的方向，第二方向是平行于盘的表面的方向。 该力基本上被柔性部分吸收，以减少与第一材料和盘之间的相互作用相关联的力，从而减少硬盘驱动器内的滑块反弹

公开(公告)号：US20100142344A1

公开(公告)日：2010-06-10

申请号：US12709554

申请日：2010-02-22

申请人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

发明人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

IPC分类号： G11B27/36

CPC分类号： G11B5/6005

摘要： A method models and calibrates the fly height of a slider above the disk for disk drives. The calibration scheme uses the Wallace spacing loss equation and laser doppler velocimetry to predict fly height and detect the actual fly height of the slider. The slider is vibrated at selected resonances, such as by capacitive coupling to the disk, and the fly height is gradually reduced. In one version, contact between the slider and disk may be detected using an arm electronics sensor. The amplitude of mean-to-peak, vibration detection is used as an indication of the actual fly height and to calibrate the modeled fly height.

摘要翻译： 一种方法建模和校准磁盘驱动器磁盘上方的浮动高度。 校准方案使用华莱士间距损失方程和激光多普勒测速来预测飞行高度并检测滑块的实际飞行高度。 滑块以所选择的谐振振动，例如通过电容耦合到盘，并且飞行高度逐渐减小。 在一个版本中，可以使用臂电子传感器来检测滑块和盘之间的接触。 使用平均峰值振幅检测的幅度作为实际飞行高度的指示，并校准建模的飞行高度。