公开(公告)号：US07312941B2

公开(公告)日：2007-12-25

申请号：US10664296

申请日：2003-09-17

申请人： Toshiki Hirano ,  Ullal Vasant Nayak ,  Qinghua Zeng

发明人： Toshiki Hirano ,  Ullal Vasant Nayak ,  Qinghua Zeng

IPC分类号： G11B27/36 ,  G11B19/04

CPC分类号： G11B5/6005 ,  G11B5/012 ,  G11B5/4826 ,  G11B5/4833 ,  G11B19/04

摘要： A Hard Disk Drive (HDD) includes a write-inhibit signal that is generated by a head-disk interaction sensor during a write process that is integrated with a suspension of the HDD when fly-height modulation of the slider is detected during a write process. The suspension load beam includes a dimple and a laminated flexure. The laminated flexure includes a surface that is adapted to receive a slider and a surface that is adapted to contact the dimple. The head-disk interaction sensor is fabricated as part of the laminations of the flexure. The head-disk interaction sensor can be an accelerometer that senses an acceleration of the flexure when the slider contacts the disk of the disk drive and/or a pressure sensor that senses a pressure between the flexure and the dimple when the slider contacts the disk. A write-inhibit circuit is responsive to the sensor signal by inhibiting the write process.

摘要翻译： 硬盘驱动器（HDD）包括在写入处理期间由头盘交互传感器产生的写禁止信号，该写入处理在写入处理期间检测到滑块的高度调制时与HDD的暂停集成 。 悬挂载荷梁包括凹坑和层压挠曲件。 层压挠曲包括适于接纳滑块和适于接触凹坑的表面的表面。 头盘相互作用传感器被制造为挠曲件的叠片的一部分。 头盘相互作用传感器可以是当滑块接触盘驱动器的盘时感测弯曲加速度的加速度计和/或当滑块接触盘时感测弯曲部和凹部之间的压力的压力传感器。 禁止写入电路通过抑制写入过程来响应于传感器信号。

公开(公告)号：US06958871B2

公开(公告)日：2005-10-25

申请号：US10664295

申请日：2003-09-17

申请人： Toshiki Hirano ,  Ullal Vasant Nayak ,  Qinghua Zeng

发明人： Toshiki Hirano ,  Ullal Vasant Nayak ,  Qinghua Zeng

IPC分类号： G11B21/21 ,  G11B5/60 ,  G11B19/04 ,  G11B27/36

CPC分类号： G11B5/6005 ,  G11B5/59694

摘要： A write-inhibit signal is generated by a head-disk interaction sensor during a write process that is integrated with a suspension of a hard disk drive (HDD) when fly-height modulation of the slider is detected during a write process The suspension load beam includes a dimple and a laminated flexure. The laminated flexure includes a surface that is adapted to receive a slider and a surface that is adapted to contact the dimple. The head-disk interaction sensor is fabricated as part of the laminations of the flexure. The head-disk interaction sensor can be an accelerometer that senses an acceleration of the flexure when the slider contacts the disk of the disk drive and/or a pressure sensor that senses a pressure between the flexure and the dimple when the slider contacts the disk. A write-inhibit circuit is responsive to the sensor signal by inhibiting the write process.

公开(公告)号：US07230800B2

公开(公告)日：2007-06-12

申请号：US10627096

申请日：2003-07-24

申请人： Toshiki Hirano ,  Ullal Vasant Nayak ,  Henry Hung Yang

发明人： Toshiki Hirano ,  Ullal Vasant Nayak ,  Henry Hung Yang

IPC分类号： G11B5/596 ,  G11B5/48

CPC分类号： G11B5/4826

摘要： A micro-fabricated chip having a stationary structure and a movable structure with a gimbal structure allows pitch and roll motion of the movable structure with respect to the stationary structure. One embodiment of the gimbal structure includes a dimple surface making a rolling-type contact with the stationary structure, and a center bar and a plurality of bar members. An alternative embodiment of the gimbal structure includes a plurality of torsion bar members. Another alternative embodiment of the gimbal structure includes a plurality of flexible members. The micro-fabricated chip can be a passive chip structure or, alternatively, a microactuator having a movable structure that moves in a rotational direction or a translational direction with respect to the stationary structure.

摘要翻译： 具有静止结构的微制造芯片和具有万向架结构的可移动结构允许可移动结构相对于固定结构的俯仰和滚动运动。 万向架结构的一个实施例包括形成与静止结构的滚动型接触的凹坑表面，以及中心杆和多个杆构件。 万向节结构的一个替代实施例包括多个扭杆构件。 万向架结构的另一个实施例包括多个柔性构件。 微制造芯片可以是无源芯片结构，或者具有可移动结构的微致动器，该可移动结构相对于固定结构在旋转方向或平移方向上移动。

公开(公告)号：US07002768B2

公开(公告)日：2006-02-21

申请号：US10683811

申请日：2003-10-09

申请人： Bruno Marchon ,  Qing Dai ,  Ferdinand Hendriks ,  Ullal Vasant Nayak

发明人： Bruno Marchon ,  Qing Dai ,  Ferdinand Hendriks ,  Ullal Vasant Nayak

IPC分类号： G11B21/02 ,  G11B17/00 ,  G11B15/46

CPC分类号： G11B19/28 ,  G11B19/04

摘要： A disk drive having a layer of lubricant on a disk surface, where an undesirable lubricant layer thickness modulation is reduced by varying ω/f during operation of the disk drive. Here ω is the angular velocity of the disk and f is a resonant frequency of a head assembly containing the head. In this manner, the amplitude of the lubricant thickness modulation is decreased, improving disk drive performance. The ratio ω/f is preferably varied by varying the disk angular velocity ω.

摘要翻译： 一种在盘表面上具有润滑剂层的磁盘驱动器，其中通过在磁盘驱动器的操作期间改变ω/ f来减少不期望的润滑剂层厚度调制。 这里，ω是磁盘的角速度，f是包含磁头的磁头组件的共振频率。 以这种方式，润滑剂厚度调制的幅度减小，从而提高磁盘驱动性能。 比值ω/ f优选通过改变盘角速度ω而变化。

公开(公告)号：US06947242B2

公开(公告)日：2005-09-20

申请号：US10123719

申请日：2002-04-16

申请人： Hong S. Seing ,  Bob C. Robinson ,  Ullal Vasant Nayak ,  Carl Robert Mendel ,  Wesley LeRoy Hillman ,  Tony Mello ,  Steven Harry Voss

发明人： Hong S. Seing ,  Bob C. Robinson ,  Ullal Vasant Nayak ,  Carl Robert Mendel ,  Wesley LeRoy Hillman ,  Tony Mello ,  Steven Harry Voss

IPC分类号： G11B5/00 ,  G11B5/60 ,  G11B21/21 ,  G11B21/02

CPC分类号： G11B5/6005 ,  G11B21/21 ,  G11B2005/001

摘要： Disclosed is an apparatus and method for dynamic fly height and roll adjustment of a physical asperity sensor (PAS) head. The PAS head is used to test disk asperity heights and mechanical interference (commonly known as glide height and take off height). The PAS may be adjusted through a pivoting device such as a joystick coupled through one or more actuators to the pivoting device by actuator arms. In one embodiment, the actuator is a piezoelectric motor. The PAS head may utilize a detector to indicate the distance of the disk asperity from the PAS head. The method comprises receiving the signal and in response, operating the actuators to adjust the position of the pivoting device to obtain a selected positioning of either the fly height or the roll of the PAS.

摘要翻译： 公开了一种物理凹凸传感器（PAS）头的动态飞行高度和侧倾调整的装置和方法。 PAS头用于测试磁盘粗糙度高度和机械干扰（通常称为滑行高度和起飞高度）。 可以通过诸如通过一个或多个致动器耦合到枢转装置的操纵杆的枢转装置通过致动器臂来调节PAS。 在一个实施例中，致动器是压电马达。 PAS头可以利用检测器来指示磁盘与PAS磁头的粗糙度的距离。 该方法包括接收信号并作为响应，操作致动器以调节枢转装置的位置，以获得PAS的飞行高度或卷的选定位置。

公开(公告)号：US5689057A

公开(公告)日：1997-11-18

申请号：US607753

申请日：1996-02-27

申请人： Peter Michael Baumgart ,  Karl A. Flechsig ,  Michael Franklin Lee ,  Wing P. Leung ,  Ullal Vasant Nayak ,  Thao Anh Nguyen ,  Timothy Christopher O'Sullivan ,  Andrew Ching Tam

发明人： Peter Michael Baumgart ,  Karl A. Flechsig ,  Michael Franklin Lee ,  Wing P. Leung ,  Ullal Vasant Nayak ,  Thao Anh Nguyen ,  Timothy Christopher O'Sullivan ,  Andrew Ching Tam

IPC分类号： B23K26/08 ,  G11B5/82 ,  G11B5/84 ,  G11B7/00 ,  G11B7/08 ,  G11B33/10 ,  G01B5/28

CPC分类号： B82Y15/00 ,  B23K26/0823 ,  B82Y10/00 ,  G11B33/10 ,  G11B5/82 ,  G11B5/8404 ,  G11B5/8408 ,  Y10T29/49995

摘要： Crater shaped bumps are made on a calibration disk which can be used for calibrating a PZT slider, the PZT slider in turn being used for detecting predetermined asperities on a production run magnetic disk. The crater shaped bumps emulate predetermined asperities of production run magnetic disks and especially asperities which are undesirable and would cause the production run disk to be discarded after testing by the PZT slider. Crater shaped bumps which emulate undesirable asperities on current production runs of magnetic disks have a diameter in the range of 10 to 25 .mu.m and a peripheral ridge with a height h.sub.r above a nominal surface of the calibration disk in the range of 75 to 120 nm. Close tolerance crater shaped bumps with this configuration can be made by impinging two or more pulses of laser energy on the same location of a calibration disk. By increasing the number of pulses the height of the peripheral ridge progressively increases. By employing multiple pulses, the height of the peripheral ridge is increased while the diameter of the crater shaped bump stays substantially constant. Further, by employing multiple pulses diameters and heights of crater shaped bumps can be produced with close tolerances within a diameter range of 5 to 20 .mu.m and a height range of 2 to 120 nm. Different arrangements of the crater shaped bumps on a calibration disk are provided for increasing the range of calibration of the PZT slider.

摘要翻译： 在可用于校准PZT滑块的校准盘上形成火山口形凸块，PZT滑块又用于检测生产运行磁盘上的预定凹凸。 火山口形凸起模拟生产运行磁盘的预定粗糙度，特别是不期望的粗糙度，并且会在PZT滑块测试后导致生产运行盘被丢弃。 在当前的磁盘生产运行中模拟不期望的粗糙度的火山口形凸起具有在10至25μm的范围内的直径和在校准盘的标称表面上的高度hr在75至120nm范围内的周边脊 。 可以通过在校准盘的相同位置上照射激光能量的两个或更多个脉冲来实现具有该配置的紧公差凹坑形状的凸块。 通过增加脉冲数，周边脊的高度逐渐增加。 通过采用多个脉冲，周边脊的高度增加，而凹坑形凸起的直径基本保持不变。 此外，通过使用多个脉冲，可以在5〜20μm的直径范围内和2〜120nm的高度范围内产生具有紧密公差的凹坑形凸起的高度。 提供校准盘上的凹坑形突起的不同布置，用于增加PZT滑块的校准范围。

公开(公告)号：US07164557B2

公开(公告)日：2007-01-16

申请号：US10784506

申请日：2004-02-23

申请人： Parul Agrawal ,  Hang Fai Ngo ,  Charles Lee ,  Li-Chung Lee ,  Ullal Vasant Nayak ,  Stephen Olson ,  Robert N. Payne ,  Christopher Ramm

发明人： Parul Agrawal ,  Hang Fai Ngo ,  Charles Lee ,  Li-Chung Lee ,  Ullal Vasant Nayak ,  Stephen Olson ,  Robert N. Payne ,  Christopher Ramm

IPC分类号： G11B5/60

CPC分类号： G11B5/6005

摘要： An air bearing burnish slider burnishes very small asperities and cleans the loose particles that adhere to the magnetic recording media. The slider applies a controllable contact force to effectively burnish disk asperities or partially attached particles. In addition, the slider cleans the loose particles effectively while flying in a stable fashion. In a low pitch design, diagonal rails push particles away from the disk surface and trailing edge pads contact the disk at lower linear velocities. Rail pads retain loose contamination and debris in their pockets and burnish asperities. Another design provides a milder burnish force and flies in a high pitch configuration. The trailing edge pads provide stable contacts and the rails help in sweeping away debris. In both designs, the contact forces can be controlled by adjusting linear velocities. A step taper at the leading edge provides a pitch-producing lift force.

摘要翻译： 空气轴承抛光滑块抛光非常小的凹凸，并清洁附着在磁记录介质上的松散颗粒。 滑块应用可控的接触力来有效地抛光磁盘粗糙度或部分附着的颗粒。 此外，滑块可以以稳定的方式有效地清洁松散的颗粒。 在低间距设计中，斜轨将颗粒推离盘表面，后缘垫以较低的线速度接触盘。 轨道垫在其口袋中保持松散的污染和碎屑，并且消除粗糙。 另一种设计提供更温和的抛光力并以高间距配置飞行。 后缘垫提供稳定的触点，导轨有助于扫除碎屑。 在这两种设计中，接触力可以通过调整线性速度来控制。 在前缘的阶梯锥形提供产生俯仰的提升力。

公开(公告)号：US6125005A

公开(公告)日：2000-09-26

申请号：US561

申请日：1997-12-30

申请人： Francis Chee-Shuen Lee ,  Robert Nolan Payne ,  Ullal Vasant Nayak

发明人： Francis Chee-Shuen Lee ,  Robert Nolan Payne ,  Ullal Vasant Nayak

IPC分类号： G11B5/60

CPC分类号： G11B5/6005

摘要： An air bearing slider for supporting a magnetic read/write head on a moving disk includes at least one front force carrying pad located in front of a suspension pivot point of an air bearing slider, at least one rear force-carrying pad located behind the suspension pivot point of the air bearing slider, and a trailing-edge pad having a magnetic read/write head embedded in a rear portion of the trailing-edge pad. Each front force-carrying pad carries a front air bearing force that is generated by a relative motion between a surface of the disk and the slider when the surface of the disk has a predetermined disk velocity with respect to the slider. Each rear force-carrying pad carries a rear air bearing force that is generated by the relative motion between the surface of the disk and the slider. The trailing edge pad carries substantially no air bearing force. According to the invention, as an atmospheric pressure associated with the air bearing slider decreases, a flying height associated with each front force-carrying pad and each rear force-carrying pad decreases so that a pitch angle of the air bearing slider decreases and a flying height associated with the trailing-edge pad at the magnetic read/write head changes by less than 5 nm at a predetermined disk velocity.

摘要翻译： 用于在移动盘上支撑磁读/写头的空气轴承滑块包括位于空气轴承滑块的悬架枢转点前方的至少一个前力传递垫，位于悬架后面的至少一个后推力垫 空气轴承滑块的枢转点和具有嵌入在后缘垫的后部中的磁读/写头的后缘垫。 每个前推力垫带有前空气支承力，当空气表面相对于滑块具有预定的盘速度时，前空气支承力由盘的表面与滑块之间的相对运动产生。 每个后推力垫承载由盘的表面和滑块之间的相对运动产生的后空气支承力。 后缘衬垫基本上不承载空气支承力。 根据本发明，随着与空气轴承滑块相关联的大气压力减小，与每个前推力垫和每个后推力垫相关联的飞行高度减小，使得空气轴承滑块的俯仰角减小，并且飞行 在磁读/写头处与后缘焊盘相关联的高度以预定的磁盘速度改变小于5nm。

公开(公告)号：US06767584B2

公开(公告)日：2004-07-27

申请号：US10144510

申请日：2002-05-13

申请人： James A. Hagan ,  Ullal Vasant Nayak ,  Janice Blue Ostrom ,  Douglas Howard Piltingsrud ,  Douglas A. Kuchta

发明人： James A. Hagan ,  Ullal Vasant Nayak ,  Janice Blue Ostrom ,  Douglas Howard Piltingsrud ,  Douglas A. Kuchta

IPC分类号： B05D500

CPC分类号： G11B5/7315 ,  C03C17/006 ,  C03C2204/08 ,  C03C2217/42 ,  C04B41/009 ,  C04B41/5353 ,  C04B41/91 ,  C04B2111/00362 ,  G11B5/8404 ,  C04B33/00

摘要： A method for texturing substrate surfaces and a substrate product, such as for computer disk drives. Microbump textured substrates are produced having a Rp value of about 20-200 Å and a ratio of Rmax:Rp of about 1.4 or less. In an exemplary embodiment, a microbump textured substrate is produced having colloidal particles on a surface thereof at a density of at least about 25 particles per 25 &mgr;m2, wherein the surface topography includes a Rp value of about 20-200 Å, a micro-roughness Rq of about 10 Å or less, and a ratio of Rmax:Rp of about 1.4 or less. An exemplary method includes first providing a substrate surface having a surface micro-roughness Rq of about 10 Å or less and depositing colloidal particles on the surface to provide a Rp value of about 20-200 Å and a ratio of Rmax:Rp of about 1.4 or less. In a further exemplary embodiment, the method increases the micro-roughness Rq, but to a value that is still less than about 10 Å with Rmax:Rp still of about 1.4 or less.

摘要翻译： 用于纹理化衬底表面和衬底产品的方法，例如用于计算机磁盘驱动器。 产生具有大约20-200的Rp值和约1.4或更小的Rmax:Rp的比率的微型块纹理衬底。 在一个示例性实施方案中，制备了在其表面上具有至少约25个颗粒/ 25mum 2的密度的胶体颗粒，其中表面形貌包括约20-200的Rp值， 微观粗糙度Rq为约10以下，Rmax:Rp为约1.4以下的比例。 一种示例性方法包括首先提供具有约10埃或更小的表面微粗糙度Rq的基底表面，并在表面上沉积胶体颗粒以提供约20-200的Rp值，并且Rmax:Rp的比例为约1.4 或更少。 在另一示例性实施方案中，该方法增加了微观粗糙度Rq，但是增加了仍然小于约10的值，Rmax：Rp仍为约1.4或更小。

公开(公告)号：US06497021B2

公开(公告)日：2002-12-24

申请号：US09231424

申请日：1999-01-14

申请人： Francis Chee-Shuen Lee ,  Michael Lee McGhee ,  Salvador Navarro ,  Ullal Vasant Nayak ,  Hang Fai Ngo

发明人： Francis Chee-Shuen Lee ,  Michael Lee McGhee ,  Salvador Navarro ,  Ullal Vasant Nayak ,  Hang Fai Ngo

IPC分类号： B24B3900

CPC分类号： B24B37/048 ,  B24B39/06 ,  G11B5/8404 ,  Y10S977/70 ,  Y10S977/84 ,  Y10T29/47

摘要： A method and apparatus for providing a low cost contact burnish slider is disclosed that can remain in contact or at the initial low flying heights even as the pad surfaces and leading edges wear. The burnish slider includes a body having a leading edge and a trailing edge and an air bearing surface being configured at the leading edge of the body to cut disk asperities as the slider flies and configured away from the leading edge to maintain a flying attitude wherein the leading edge is near the data recording surface and to provide restoring forces to maintain the flying attitude. The air bearing surface may include a front pad proximal to the leading edge and a rear pad distal to the leading edge. Alternatively, the air bearing surface may include two front pads proximal to the leading edge on opposite sides of the body and two rear pads distal to the leading edge and disposed on opposite sides of the body. The front and rear pad(s) extends substantially across the body of the slider. An offset pivot is provided for constraining the moment balance of the slider to provide a low pitch flying attitude. The rear pad(s) further includes a mechanical taper proximal to the trailing edge to minimize load/unload damage. The air bearing surface configuration away from the leading edge provides a force that restores the flying attitude to the slider when an impulse lifting the leading edge is encountered.

摘要翻译： 公开了一种用于提供低成本接触抛光滑块的方法和装置，即使在焊盘表面和前缘磨损时也可以保持接触或初始低飞行高度。 抛光滑块包括具有前缘和后缘的主体，并且空气支承表面构造在主体的前缘处，以在滑块从远离前边缘的方向飞行并构造成保持飞行姿态时切割圆盘凹凸，以保持飞行姿态，其中， 前沿靠近数据记录表面，并提供恢复力以保持飞行姿态。 空气轴承表面可以包括靠近前缘的前垫和远离前缘的后垫。 或者，空气轴承表面可以包括靠近主体的相对侧上的前缘的两个前垫，以及远离前缘的两个后垫，并且设置在主体的相对侧上。 前垫和后垫基本上延伸穿过滑块的主体。 提供了一个偏移枢轴，用于限制滑块的力矩平衡以提供低俯仰飞行姿态。 后垫还包括靠近后缘的机械锥形，以最小化负载/卸载损坏。 当引起提升前缘的脉冲时，空气轴承表面配置远离前缘提供了一种力，可以将飞行姿态恢复到滑块。