公开(公告)号：US06473259B1

公开(公告)日：2002-10-29

申请号：US09405832

申请日：1999-09-24

申请人： David S. Kuo ,  Wei H. Yao ,  Ramesh Sundaram ,  Huan Tang

发明人： David S. Kuo ,  Wei H. Yao ,  Ramesh Sundaram ,  Huan Tang

IPC分类号： G11B2102

CPC分类号： G11B21/21 ,  G11B5/60

摘要： A disk head fly height adjustment method includes positioning a disk head over a surface of a rotating data storage disk and dynamically altering a load point of the disk head by changing an electrical force applied to an active element mounted to a head-gimbal assembly. A data storage apparatus includes a head assembly having a data transfer head coupled to a gimbal and an active element coupling the head assembly and a suspension. The active element is configured to exert a force between the head assembly and the suspension in response to an electrical force applied to the active element. The active element can dynamically shift a load point of a disk head. Shifting the load point can alter the pitch of the disk head and, consequently, the fly height of the head.

摘要翻译： 盘头飞行高度调节方法包括将盘头定位在旋转数据存储盘的表面上，并且通过改变施加到安装到头部万向节组件上的有源元件的电力来动态地改变盘头的负载点。 数据存储装置包括头组件，其具有耦合到万向节的数据传送头和联接头组件和悬架的有源元件。 有源元件构造成响应于施加到有源元件的电力而在头部组件和悬架之间施加力。 有源元件可以动态地移动磁盘头的负载点。 移动负载点可以改变磁头的间距，从而改变磁头的飞行高度。

公开(公告)号：US06667844B1

公开(公告)日：2003-12-23

申请号：US09404038

申请日：1999-09-23

申请人： Wei H. Yao ,  Ramesh Sundaram ,  David S. Kuo

发明人： Wei H. Yao ,  Ramesh Sundaram ,  David S. Kuo

IPC分类号： G11B2102

CPC分类号： G11B5/4833 ,  G11B5/58 ,  G11B21/20

摘要： The active vibration suppression of a slider suspension arm is achieved by including as part of the suspension arm two bimorph piezoelectric elements. A first bimorph piezoelectric element is attached to the top of the suspension arm and acts as a sensor. A second bimorph piezoelectric element is attached to the bottom of the suspension arm and acts as an actuator. The actuator is controlled as a function of a voltage measured by the sensor so that the actuator damps periodic vibrations occurring in the suspension arm.

摘要翻译： 通过将悬臂的一部分包括两个双压电晶片压电元件来实现滑块悬架臂的主动振动抑制。 第一个双压电晶片压电元件连接到悬臂的顶部并用作传感器。 第二双压电晶片压电元件附接到悬架臂的底部并用作致动器。 致动器根据传感器测量的电压进行控制，以便致动器可以抑制悬臂中发生的周期振动。

公开(公告)号：US06229670B1

公开(公告)日：2001-05-08

申请号：US09381079

申请日：2000-01-14

申请人： David S. Kuo ,  Wei H. Yao ,  Ramesh Sundaram

发明人： David S. Kuo ,  Wei H. Yao ,  Ramesh Sundaram

IPC分类号： G11B582

CPC分类号： G11B23/0035 ,  G11B5/54 ,  G11B5/5582 ,  G11B5/6005 ,  G11B5/6011 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/82 ,  G11B5/84 ,  G11B5/8404 ,  G11B5/8408 ,  G11B21/12 ,  G11B21/21 ,  G11B21/22 ,  G11B33/08

摘要： A magnetic data storage medium includes a dedicated transducing head contact zone for engaging an air bearing slider, primarily when the disk is stationary. The contact zone is textured with at least one elongate ridge extending in the circumferential direction. When a single ridge is formed, it runs in a spiral path in multiple turns with a predetermined radial pitch at least ten times the nominal ridge width. The ridge protrudes axially outward from a nominal surface plane of the contact zone, and is rounded and free of sharp edges. The ridge, or plurality of ridge sections, can be formed by a texturing process that includes directing a laser beam, focused, onto the contact zone surface. While the disk is rotated to maintain a constant circumferential speed relative to the laser, it also is translated radially to provide the desired radial pitch. The laser is operated in a CW (continuous wave) mode, to create a more uniform ridge.

摘要翻译： 磁数据存储介质包括用于接合空气轴承滑块的专用换能头接触区，主要是当盘静止时。 接触区域具有在圆周方向上延伸的至少一个细长脊纹理。 当形成单个脊时，其以预定的径向间距以多匝的螺旋路径延伸至少十倍于标称脊宽度。 脊从接触区的标称表面平面向外突出，并且圆形且没有锋利的边缘。 脊或多个脊部可以通过纹理化工艺形成，其包括将聚焦在接触区表面上的激光束引导。 当盘旋转以相对于激光器保持恒定的圆周速度时，其也被径向平移以提供期望的径向间距。 激光以CW（连续波）模式操作，以创建更均匀的脊。

公开(公告)号：US06369900B1

公开(公告)日：2002-04-09

申请号：US09211217

申请日：1998-12-14

申请人： Ramesh Sundaram ,  Wei H. Yao

发明人： Ramesh Sundaram ,  Wei H. Yao

IPC分类号： G01B1114

CPC分类号： G01B11/14 ,  G11B5/6005 ,  G11B7/122 ,  G11B11/1058 ,  G11B33/10

摘要： An improved glide head has optical marks on the air bearing surface. The glide heads can be used for detecting defects on disc surfaces following an evaluation of the fly height as a function of disc rotation. The optical marks provide a position for focusing light used in the optical measurement of fly height. The optical marks have measurably different optical properties from the portions of the air bearing surface not covered by an optical mark. The differences in optical properties of the optical marks can be used to adjust the position of the optical system relative to the glide head to ensure that the light is focused on an optical mark.

摘要翻译： 改进的滑行头在空气轴承表面上具有光学标记。 在评估飞行高度作为盘旋转的函数之后，滑动头可用于检测盘表面上的缺陷。 光学标记提供了用于聚焦在飞行高度的光学测量中使用的光的位置。 光学标记与未被光学标记覆盖的空气轴承表面的部分具有可测量的不同的光学特性。 可以使用光学标记的光学特性的差异来调整光学系统相对于滑动头的位置，以确保光聚焦在光学标记上。

公开(公告)号：US6105421A

公开(公告)日：2000-08-22

申请号：US252263

申请日：1999-01-18

申请人： Wei H. Yao ,  Ramesh Sundaram

发明人： Wei H. Yao ,  Ramesh Sundaram

IPC分类号： G01N19/02 ,  G11B5/82 ,  G11B33/10 ,  G01B5/28

CPC分类号： G11B33/10 ,  G01N19/02 ,  G11B5/82

摘要： A glide head apparatus for testing surface characteristics of a disc includes a gimbal, a slider and an actuator including a piezoelectric material disposed between the gimbal and the slider. A voltage applied across the piezoelectric material is controllable to cause the piezoelectric material to expand or contract depending on the applied voltage so as to vary the fly height between the slider and a disc under test. The fly height can be varied without substantially varying the linear velocity of the disc under test. Methods of testing surface characteristics of a disc using the glide head apparatus also are disclosed.

摘要翻译： 用于测试盘的表面特性的滑行头装置包括万向节，滑块和包括布置在万向节和滑块之间的压电材料的致动器。 施加在压电材料上的电压是可控的，以使压电材料根据所施加的电压而膨胀或收缩，以便改变滑块和待测圆盘之间的飞行高度。 飞行高度可以变化，而基本上不改变被测圆盘的线速度。 还公开了使用滑动头装置测试盘的表面特性的方法。

公开(公告)号：US06899456B2

公开(公告)日：2005-05-31

申请号：US09176580

申请日：1998-10-21

申请人： Ramesh Sundaram ,  Wei H. Yao

发明人： Ramesh Sundaram ,  Wei H. Yao

IPC分类号： G01N25/72 ,  G11B5/00 ,  G11B5/012 ,  G11B5/60 ,  G11B23/50 ,  G11B33/10 ,  G11B5/127 ,  G01B5/207 ,  G01N25/00 ,  G11B5/40

CPC分类号： G11B33/10 ,  G01N25/72 ,  G11B5/012 ,  G11B5/6076 ,  G11B23/505 ,  G11B2005/001 ,  Y10T29/49041 ,  Y10T29/49048

摘要： Glide heads for the detection of asperities on a storage disc have a thermal transducer oriented along the air bearing surface. The thermal transducer generally is in electrical contact with a circuit to measure the electrical resistance of the thermal transducer. Preferred methods of depositing the thermal transducer involve the deposition of the thermal transducer on the smooth surface of a wafer prior to the slicing of individual sliders.

摘要翻译： 用于检测存储盘上的凹凸的滑动头具有沿空气轴承表面定向的热传感器。 热转换器通常与电路电接触以测量热传感器的电阻。 沉积热变换器的优选方法包括在各个滑块的切片之前将热变换器沉积在晶片的光滑表面上。

公开(公告)号：US06272909B1

公开(公告)日：2001-08-14

申请号：US09612790

申请日：2000-07-10

申请人： Wei H. Yao ,  Ramesh Sundaram

发明人： Wei H. Yao ,  Ramesh Sundaram

IPC分类号： G01B560

CPC分类号： G11B33/10 ,  G01N19/02 ,  G11B5/82

摘要： A glide head apparatus for testing surface characteristics of a disc includes a gimbal, a slider and an actuator including a piezoelectric material disposed between the gimbal and the slider. A voltage applied across the piezoelectric material is controllable to cause the piezoelectric material to expand or contract depending on the applied voltage so as to vary the fly height between the slider and a disc under test. The fly height can be varied without substantially varying the linear velocity of the disc under test. Methods of testing surface characteristics of a disc using the glide head apparatus also are disclosed.

摘要翻译： 用于测试盘的表面特性的滑行头装置包括万向节，滑块和包括布置在万向节和滑块之间的压电材料的致动器。 施加在压电材料上的电压是可控的，以使压电材料根据所施加的电压而膨胀或收缩，以便改变滑块和待测圆盘之间的飞行高度。 飞行高度可以变化，而基本上不改变被测圆盘的线速度。 还公开了使用滑动头装置测试盘的表面特性的方法。

公开(公告)号：US6112582A

公开(公告)日：2000-09-05

申请号：US252889

申请日：1999-02-18

申请人： Wei H. Yao ,  Ramesh Sundaram

发明人： Wei H. Yao ,  Ramesh Sundaram

IPC分类号： G11B5/60 ,  G11B5/82 ,  G11B33/10 ,  G01B5/28

CPC分类号： G11B5/6005 ,  G11B5/82 ,  G11B33/10

摘要： A glide head that can be coupled to a mounting base via a load arm includes a gimbal. A slider is coupled to the gimbal and includes an air bearing surface having a downward protrusion. The distance between the protrusion and a disc under test is substantially insensitive to changes in a height measured from a bottom of the mounting base to an upper surface of the disc. Furthermore, the protrusion can have a distal end extending downward such that a distance from the distal end to the disc under test is less than a distance from every other surface of the slider to the disc during operation of the glide head. The glide head can have a fly height that is substantially constant. Therefore, the glide head can provide more accurate and more uniform detection of outwardly projecting defects on the surface of the disc.

摘要翻译： 可以通过负载臂联接到安装基座的滑行头包括万向节。 滑动器联接到万向架并且包括具有向下突出部的空气支承表面。 突起与受试盘之间的距离对于从安装基座的底部到盘的上表面测量的高度的变化基本上不敏感。 此外，突起可以具有向下延伸的远端，使得在滑动头的操作期间，从远端到被测盘的距离小于从滑块的每个其他表面到盘的距离。 滑行头可以具有基本恒定的飞行高度。 因此，滑动头可以提供在盘的表面上向外突出的缺陷的更精确和更均匀的检测。

公开(公告)号：US07178995B2

公开(公告)日：2007-02-20

申请号：US10429899

申请日：2003-05-05

申请人： Lew Aronson ,  Jignesh Shah ,  Paul Rosenberg ,  Ramesh Sundaram

发明人： Lew Aronson ,  Jignesh Shah ,  Paul Rosenberg ,  Ramesh Sundaram

IPC分类号： G02B6/36

CPC分类号： G02B6/4207 ,  G02B6/421 ,  G02B6/4292

摘要： Embodiments of the invention generally provide an optical component configured to minimize reflectance. The component generally includes an optical housing having a bore formed therethrough, the bore having a central component receiving portion, and a glass block positioned in the component receiving portion in abutment with a fiber receiving bore. The component further includes a fuzzy mount secured in the central component receiving portion, the fuzzy mount being secured via a plurality of extending teeth formed on an outer surface thereof, the teeth being configured to engage an inner surface of the central component receiving portion to secure the fuzzy mount therein.

摘要翻译： 本发明的实施例通常提供一种配置成使反射率最小化的光学部件。 该部件通常包括具有穿过其中形成的孔的光学壳体，所述孔具有中心部件接收部分，以及位于与光纤接收孔邻接的部件接收部分中的玻璃块。 所述部件还包括固定在所述中央部件接收部分中的模糊安装座，所述模糊安装座通过形成在其外表面上的多个延伸齿固定，所述齿构造成与所述中央部件接收部分的内表面接合以固定 其中的模糊安装。

公开(公告)号：US06301797B1

公开(公告)日：2001-10-16

申请号：US09325887

申请日：1999-06-04

申请人： Ramesh Sundaram ,  Wei Yao ,  Li-Ping Wang ,  David Shiao-Min Kuo

发明人： Ramesh Sundaram ,  Wei Yao ,  Li-Ping Wang ,  David Shiao-Min Kuo

IPC分类号： B65G4722

CPC分类号： G11B5/012 ,  G11B5/5582 ,  G11B17/038 ,  G11B19/04 ,  G11B33/08 ,  G11B33/10 ,  Y10S414/135

摘要： A method and apparatus for data disks adapted to compensate for effects of shock loads imparted to a disk drive which are of sufficient magnitude to cause disk shifts. A series of topographical features are formed on the disk surface or edge to cause signal fluctuation in a sensor during read-back mode operation. An initial signal profile is stored as a map indicative of track or disk alignment with respect to the actuator assembly. Selectively, such as after a known shock event, the topographical features are re-profiled. A comparison of the profiles provides a measure of any track distortion which must be compensated for in future read-write operations by adjustments to data track servo follower algorithms.

摘要翻译： 一种用于数据盘的方法和装置，适用于补偿赋予磁盘驱动器的冲击载荷的影响，磁盘驱动器具有足够大的幅度以引起磁盘移位。 在磁盘表面或边缘上形成一系列地形特征，以在回读模式操作期间引起传感器中的信号波动。 初始信号轮廓被存储为指示相对于致动器组件的轨道或盘对准的映射。 选择性地，例如在已知的冲击事件之后，地形特征被重新分类。 配置文件的比较可以提供任何跟踪失真的量度，通过调整数据轨道伺服跟随器算法，必须在将来的读写操作中对其进行补偿。