公开(公告)号：US07092194B2

公开(公告)日：2006-08-15

申请号：US10775406

申请日：2004-02-09

申请人： Dallas W. Meyer

发明人： Dallas W. Meyer

IPC分类号： G11B5/60

CPC分类号： G11B5/6005 ,  G11B5/596 ,  G11B27/36

摘要： Methods for calibrating and positioning a recording head having a bi-directional transducer for use with a magnetic storage device is disclosed. The bi-directional transducer of the recording head is positioned within the recording head to enable vertical fly height motion and lateral track-to-track motion of the transducer to occur with respect to the surface of a magnetic storage medium within the storage device. Calibration of the bi-directional transducer in the fly height and track-to-track directions enables the transducer to align itself with more precision with the magnetic medium surface, thereby improving data read and write operations for the storage device. Calibration algorithms for fly height and track-to-track adjustment are presented, and possible motion of the bi-directional transducer is resolved into multi-function equations to account for various variables relating to transducer motion.

摘要翻译： 公开了用于校准和定位具有用于磁存储装置的双向换能器的记录头的方法。 记录头的双向换能器位于记录头内，以使得垂直飞行高度运动和换能器的横向轨迹到轨道运动相对于存储装置内的磁性存储介质的表面发生。 双向传感器在飞行高度和轨道到轨道方向的校准使得传感器能够使其与磁性介质表面更精确地对准，从而改善存储设备的数据读取和写入操作。 提出了用于飞行高度和轨道到轨道调整的校准算法，双向换能器的可能运动被分解为多功能方程，以解决与换能器运动有关的各种变量。

公开(公告)号：US06859346B1

公开(公告)日：2005-02-22

申请号：US10342920

申请日：2003-01-13

申请人： Dallas W. Meyer

发明人： Dallas W. Meyer

IPC分类号： G11B5/127 ,  G11B5/17 ,  G11B5/56 ,  G11B5/60

CPC分类号： G11B5/17 ,  G11B5/1274

摘要： Transducer elements of recording heads for magnetic storage media are moved independently in either of two directions with respect to the slider of the recording head. The motion is controlled using a micropositioner having magnetic coils integrated into the recording head. The transducer moves in the x direction between data tracks and in the z direction perpendicular to the surface of the magnetic storage medium. The micropositioners are used for small-scale positioning of the transducers over data tracks and to adjust fly heights. Because of the high minimum resonant frequencies and the low mass of the transducers, the micropositioners also improve settling times associated with track following. The micropositioners can be used during fabrication for dimensional control of recording head components. The motion of the transducers in the z direction enables the recording heads to be used reliably in the presence of asperities and changing ambient pressures and temperatures.

摘要翻译： 用于磁存储介质的记录头的传感器元件相对于记录头的滑块在两个方向中的任一方向上独立地移动。 使用具有集成到记录头中的磁性线圈的微定位器来控制运动。 换能器在数据轨道之间的x方向上移动，并且在垂直于磁存储介质的表面的z方向上移动。 微定位器用于在数据轨道上小型地定位换能器并调整飞行高度。 由于高的最小谐振频率和低质量的换能器，微定位器还改善了跟踪跟踪相关的稳定时间。 微型定位器可以在制造过程中用于记录头部件的尺寸控制。 传感器在z方向上的运动使得能够在存在粗糙和变化的环境压力和温度的情况下可靠地使用记录头。

公开(公告)号：US06577466B2

公开(公告)日：2003-06-10

申请号：US10027937

申请日：2001-12-21

申请人： Dallas W. Meyer ,  Mark J. Schaenzer ,  Zhu Feng ,  Chung Yuang Shih ,  Chiu-Shing Frank Poon ,  Vidyadhara K. Gubbi

发明人： Dallas W. Meyer ,  Mark J. Schaenzer ,  Zhu Feng ,  Chung Yuang Shih ,  Chiu-Shing Frank Poon ,  Vidyadhara K. Gubbi

IPC分类号： G11B2102

CPC分类号： G11B33/10 ,  G11B5/012 ,  G11B5/6035 ,  G11B5/6076 ,  G11B2005/001

摘要： An apparatus and method for evaluating surface characteristics of a recording disc prior to incorporation into a disc drive. A glide test system includes a glide test head supportable over the disc, the glide test head having a negative-pressure air bearing slider and a contact sensor which outputs a signal when the glide test head contacts a feature of the disc surface. The glide test head and the disc are characterized as opposing plates of a variable capacitor with a dielectric layer therebetween including at least a layer of air supporting the glide test head. A voltage source, operably coupled to the glide test head and the disc, applies a fly height control voltage across the capacitor to adjust the fly height of the glide test head. The disc surface preferably comprises a data region configured to magnetically store data as the disc is rotated and a texturized landing zone configured to support the disc drive read/write head when the disc is stopped. The voltage source accordingly applies a first fly height control voltage to maintain the glide test head at a first glide distance over the data region and a second fly height control voltage to maintain the glide test head at a second, greater glide distance over the landing zone.

摘要翻译： 一种用于评估在结合到盘驱动器中之前记录盘的表面特性的装置和方法。 滑行测试系统包括可在盘上支撑的滑行测试头，滑动测试头具有负压空气轴承滑块和当滑动测试头接触盘表面的特征时输出信号的接触传感器。 滑动测试头和盘被表征为具有介电层的可变电容器的相对板，其间包括至少一个支撑滑动测试头的空气层。 可操作地耦合到滑动测试头和盘的电压源在电容器两端施加飞高控制电压，以调整滑动测试头的飞行高度。 盘表面优选地包括被配置为当盘旋转时磁数据存储的数据区域，以及被配置为当盘停止时支持盘驱动器读/写头的纹理着陆区域。 因此，电压源施加第一飞行高度控制电压，以将滑行测试头保持在数据区域上的第一滑行距离和第二飞行高度控制电压，以将滑行测试头保持在着陆区域的第二较大滑移距离 。

公开(公告)号：US06507454B1

公开(公告)日：2003-01-14

申请号：US09050477

申请日：1998-03-30

申请人： Dallas W. Meyer ,  Steven B. Slade ,  Jeffery K. Berkowitz ,  Edward M. Simpson

发明人： Dallas W. Meyer ,  Steven B. Slade ,  Jeffery K. Berkowitz ,  Edward M. Simpson

IPC分类号： G11B5187

CPC分类号： G11B5/102 ,  G11B5/09 ,  G11B5/1871

摘要： A slider includes a magnetic head having first and second magnetic poles separated by a gap. A recess in the air-bearing surface extends into at least the first magnetic pole and has a first portion having a length parallel to the gap length to define a gap width orthogonal to the gap length. The first portion of the recess has a curved depth defining a curved profile along its length. In one embodiment, the recess has a second portion having a length orthogonal to the gap length and a depth defining a curved profile along its length.

摘要翻译： 滑块包括具有由间隙分开的第一和第二磁极的磁头。 空气轴承表面中的凹部至少延伸到第一磁极，并且具有长度与间隙长度平行的第一部分，以限定与间隙长度正交的间隙宽度。 凹部的第一部分具有沿其长度限定弯曲轮廓的弯曲深度。 在一个实施例中，凹部具有与间隙长度正交的长度的第二部分和沿其长度限定弯曲轮廓的深度。

公开(公告)号：US06483666B2

公开(公告)日：2002-11-19

申请号：US09799840

申请日：2001-03-06

申请人： Bo Wei ,  Dallas W. Meyer ,  Zhengda Pan ,  Jialuo J. Xuan ,  Chung Y. Shih

发明人： Bo Wei ,  Dallas W. Meyer ,  Zhengda Pan ,  Jialuo J. Xuan ,  Chung Y. Shih

IPC分类号： G11B582

CPC分类号： G11B5/82 ,  B23K26/06 ,  B23K26/064 ,  B23K26/0648 ,  B23K26/0652 ,  B23K26/0665 ,  B23K26/073 ,  G11B5/74

摘要： Magnetic data storage disks, particularly along dedicated transducing head contact regions, are laser textured according to a process in which beam shaping optical components impart an elliptical or otherwise elongated cross-section to the laser beam. Consequently, individual texturing features such as rims and nodules are elliptical or elongate, with more gradual height gradients in directions parallel to their major axes. The texturing features further are oriented with respect to the direction of transducing head accelerations and decelerations, which yields high performance in terms of reduced dynamic friction, reduced stiction and better wear characteristics. Texturing features are formed in a variety of patterns, including patterns with adjacent features contacting one another. A further refinement involves forming features with substantially different slopes on opposites sides of a maximum height region.

摘要翻译： 磁性数据存储盘，特别是沿着专用的传感头接触区域，根据波束整形光学部件赋予激光束的椭圆形或其他细长横截面的过程被激光纹理化。 因此，诸如轮辋和结节的单个纹理特征是椭圆形或细长的，在与它们的主轴平行的方向上具有更渐进的高度梯度。 纹理特征进一步相对于头部加速度和减速度的转向的方向定向，这在减少的动态摩擦，降低的静摩擦和更好的磨损特性方面产生高性能。 纹理特征以各种图案形成，包括具有彼此接触的相邻特征的图案。 进一步的细化包括在最大高度区域的相对侧上形成具有基本不同斜率的特征。

公开(公告)号：US06225595B1

公开(公告)日：2001-05-01

申请号：US08849001

申请日：1999-08-13

申请人： Bo Wei ,  Dallas W. Meyer ,  Zhengda Pan ,  Jialuo J. Xuan ,  Chung Y. Shih

发明人： Bo Wei ,  Dallas W. Meyer ,  Zhengda Pan ,  Jialuo J. Xuan ,  Chung Y. Shih

IPC分类号： B23K2600

CPC分类号： G11B5/82 ,  B23K26/06 ,  B23K26/064 ,  B23K26/0648 ,  B23K26/0652 ,  B23K26/0665 ,  B23K26/073 ,  G11B5/74

摘要： Magnetic data storage disks, particularly along dedicated transducing head contact regions, are laser textured according to a process in which beam shaping optical components impart an elliptical or otherwise elongated cross-section to the laser beam. Consequently, individual texturing features such as rims and nodules are elliptical or elongate, with more gradual height gradients in directions parallel to their major axes. The texturing features further are oriented with respect to the direction of transducing head accelerations and decelerations, which yields high performance in terms of reduced flying height, improved glide avalanche, reduced dynamic friction, reduced stiction and better wear characteristics. Texturing features are formed in a variety of patterns, including patterns with adjacent features contacting one another. A further refinement involves forming features with substantially different slopes on opposites sides of a maximum height region.

摘要翻译： 磁性数据存储盘，特别是沿着专用的传感头接触区域，根据波束整形光学部件赋予激光束的椭圆形或其他细长横截面的过程被激光纹理化。 因此，诸如轮辋和结节的单个纹理特征是椭圆形或细长的，在与它们的主轴平行的方向上具有更渐进的高度梯度。 纹理特征进一步相对于头部加速度和减速度的转向的方向定向，其在降低飞行高度，改善的滑动雪崩，减少的动态摩擦，降低的静摩擦和更好的磨损特性方面产生高性能。 纹理特征以各种图案形成，包括具有彼此接触的相邻特征的图案。 进一步的细化包括在最大高度区域的相对侧上形成具有基本不同斜率的特征。

公开(公告)号：US6098880A

公开(公告)日：2000-08-08

申请号：US45254

申请日：1998-03-20

申请人： Dallas W. Meyer ,  Jeffery K. Berkowitz ,  Michael B. Hintz ,  Edward M. Simpson

发明人： Dallas W. Meyer ,  Jeffery K. Berkowitz ,  Michael B. Hintz ,  Edward M. Simpson

IPC分类号： G11B5/39 ,  G11B5/40 ,  G11B5/48 ,  G11B5/60 ,  G06K7/08

CPC分类号： G11B5/398 ,  G11B5/3903 ,  G11B5/40 ,  G11B5/4886 ,  G11B5/6011

摘要： A magnetoresistive element has a height that extends from the air-bearing surface of a head. The height is determined by a slot in the head extending from the air-bearing surface adjacent the sensor portion at an acute angle to both the air bearing surface and the height of the magnetoresistive element to separate the magnetoresistive element into the sensor portion and a dormant portion. Alternatively, the height is determined by a recess of design depth in the magnetoresistive element at the air bearing surface. Alternatively, the height of the magnetoresistive element is determined by a stepped thickness to the first and second bias current carrying contacts along the height of the magnetoresistive element.

摘要翻译： 磁阻元件具有从头部的空气轴承表面延伸的高度。 该高度由头部中的狭缝确定，头部从邻近传感器部分的空气轴承表面以锐角与磁阻元件的空气轴承表面和高度两者分开，以将磁阻元件分离成传感器部分和休眠 一部分。 或者，高度由在空气轴承表面处的磁阻元件中的设计深度的凹部确定。 或者，磁阻元件的高度由沿着磁阻元件的高度的第一和第二偏置电流承载触点的阶梯形厚度确定。

公开(公告)号：US6048255A

公开(公告)日：2000-04-11

申请号：US522287

申请日：1997-06-26

申请人： David S. Kuo ,  Dallas W. Meyer

发明人： David S. Kuo ,  Dallas W. Meyer

IPC分类号： G11B5/73 ,  G11B5/84 ,  B24B1/00

CPC分类号： G11B5/7315 ,  G11B5/8404

摘要： A surface treatment process employing pulsed laser energy enables selective texturizing and polishing of non-magnetizable substrate disks used in fabricating magnetic reading and recording media. Substrate surfaces are texturized over dedicated head contact zones to form multiple nodules that are highly uniform to precisely control surface roughness. Laser polishing of data zones causes localized flow of the substrate material, to remove the residual scratches of mechanical polishing without altering the non-magnetic character of the substrate at large. Between the data zones and contact zones, transition zones can be formed by selectively graduating the nodule heights in the radial direction. The rounded structure of the nodules increases surface resistance to intended or incidental transducing head contact. Removal of residual scratches enhances resistance to corrosion and improves signal quality, since subsequent layers, including the thin film recording layer and the protective carbon layer, tend to replicate the substrate surface topography.

摘要翻译： PCT No.PCT / US95 / 10697 Sec。 371日期：1997年6月26日 102（e）日期1997年6月26日PCT提交1995年8月22日PCT公布。 公开号WO97 / 07931 日期1997年3月6日使用脉冲激光能量的表面处理工艺能够选择性地对用于制造磁读取和记录介质的可磁化基板盘进行纹理化和抛光。 基底表面通过专用头部接触区域进行纹理化，以形成高度均匀以精确控制表面粗糙度的多个结节。 数据区域的激光抛光导致基板材料的局部流动，以消除机械抛光的残留划痕，而不会改变基板的非磁性特征。 在数据区和接触区之间，可以通过在径向上选择性地分级结节高度来形成过渡区。 结节的圆形结构增加了表面对预期或偶然的换能头接触的抵抗力。 由于包括薄膜记录层和保护性碳层在内的后续层倾向于复制衬底表面形貌，因此去除残留划痕增强了耐腐蚀性并提高了信号质量。

公开(公告)号：US5991113A

公开(公告)日：1999-11-23

申请号：US833590

申请日：1997-04-07

申请人： Dallas W. Meyer ,  Paul E. Kupinski ,  Joseph C. Liu

发明人： Dallas W. Meyer ,  Paul E. Kupinski ,  Joseph C. Liu

IPC分类号： G11B5/55 ,  G11B21/02

CPC分类号： G11B21/025 ,  G11B5/5565 ,  G11B5/6064

摘要： A device for reading and recording magnetic data includes an aerodynamically supported slider with an air bearing surface, and a transducer mounted to the slider for movement toward and away from the air bearing surface responsive to changes in the slider operating temperature. In one embodiment, the transducer movement is primarily due to a difference in thermal expansion coefficients between a transducing region of the slider incorporating the transducer, and the remainder of the slider body. In another embodiment, a strip of thermally expansive material is incorporated into the slider near the transducer to contribute to the displacement by its own expansion. A temperature control circuit, coupled to the strip of thermally expansive material or to a resistance heating element on the slider, employs a variable current source to control the slider temperature and transducer displacement. Nominal slider operating temperatures can be set to achieve a predetermined transducer flying height, to compensate for variations in flying heights among batch fabricated sliders. Optionally, a temperature sensor can be employed to measure the slider operating temperatures and provide a temperature sensitive input to the temperature control circuit.

摘要翻译： 用于读取和记录磁数据的装置包括具有空气轴承表面的空气动力学支撑的滑块和安装到滑动件的换能器，以响应于滑块操作温度的变化而朝向和远离空气轴承表面移动。 在一个实施例中，换能器移动主要是由于包含换能器的滑块的换能区域与滑块体的其余部分之间的热膨胀系数的差异。 在另一个实施例中，热膨胀材料条被并入到换能器附近的滑块中，以通过其自身的膨胀来促成位移。 耦合到热膨胀材料条或滑块上的电阻加热元件的温度控制电路采用可变电流源来控制滑块温度和换能器位移。 可以设定公称滑块的操作温度以实现预定的换能器飞行高度，以补偿批量制造的滑块之间的飞行高度的变化。 可选地，可以采用温度传感器来测量滑块操作温度，并向温度控制电路提供温度敏感输入。

公开(公告)号：US5901001A

公开(公告)日：1999-05-04

申请号：US660063

申请日：1996-06-03

申请人： Dallas W. Meyer ,  Subrahmanyan Nagarajan ,  Bo Wei

发明人： Dallas W. Meyer ,  Subrahmanyan Nagarajan ,  Bo Wei

IPC分类号： G01R33/12 ,  G11B21/21 ,  G11B27/36 ,  G11B33/10 ,  G11B5/02

CPC分类号： G01R33/1207 ,  G11B27/36 ,  G11B33/10 ,  G11B21/21

摘要： A tester for use in detecting asperities in a disc surface of a storage system includes a load arm having a proximal end and a distal end. The distal end of the load arm is positioned adjacent the disc surface. A slider is carried on the distal end of the load arm adjacent the disc surface. A thermal sensor is coupled to the slider and provides an electrical output in response to a thermal input due to interaction between the thermal sensor and asperity on the disc surface. Detection circuitry coupled to the thermal sensor detects the electrical output from the thermal sensor and responsively provides a detection output indicating the occurrence of an asperity on the disc surface.

摘要翻译： 用于检测存储系统的盘表面中的凹凸的测试器包括具有近端和远端的负载臂。 负载臂的远端位于盘表面附近。 滑块被承载在与盘表面相邻的负载臂的远端上。 热传感器耦合到滑块，并且由于热传感器和盘表面上的粗糙度之间的相互作用而响应于热输入而提供电输出。 耦合到热传感器的检测电路检测来自热传感器的电输出，并且响应地提供指示在盘表面上出现粗糙度的检测输出。