公开(公告)号：US06529342B1

公开(公告)日：2003-03-04

申请号：US09258091

申请日：1999-02-24

申请人： Zhu Feng ,  Chung Y. Shih ,  Chiu-Shing F. Poon ,  Vidyadhara K. Gubbi

发明人： Zhu Feng ,  Chung Y. Shih ,  Chiu-Shing F. Poon ,  Vidyadhara K. Gubbi

IPC分类号： G11B2102

CPC分类号： G11B5/6017

摘要： A method for controlling flying height at the interface of a magnetic head and a magnetic storage medium is described. The flying height is controlled by applying a voltage between head and medium. This controls the vertical movement of the head, and thus, may increase or decrease the flying height. For example, the flying height may be changed with surface texture to achieve high writing/reading density, where the flatness of the medium is high. Also, the contact between the head and medium may be limited where the texture includes projections such as laser bumps.

摘要翻译： 描述了一种用于控制磁头和磁存储介质的界面处的飞行高度的方法。 飞行高度通过在头部和中间之间施加电压来控制。 这可以控制头部的垂直运动，从而可以增加或减少飞行高度。 例如，飞行高度可以用表面纹理改变，以实现高写入/读取密度，其中介质的平坦度高。 此外，当纹理包括诸如激光凸块的突起时，头和介质之间的接触可能受到限制。

公开(公告)号：US06366416B1

公开(公告)日：2002-04-02

申请号：US09497370

申请日：2000-02-03

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： G11B502

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.

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：US08184405B1

公开(公告)日：2012-05-22

申请号：US12930753

申请日：2011-01-14

申请人： Guoqiang Zheng ,  Ellis Cha ,  Zhu Feng ,  Sindy Yeung

发明人： Guoqiang Zheng ,  Ellis Cha ,  Zhu Feng ,  Sindy Yeung

IPC分类号： G11B5/55

CPC分类号： G11B5/6082 ,  G11B5/102

摘要： A slider is formed by a three-step ion milling process with an ABS topography that provides aerodynamic stability at sub-nanometer flying heights. The ABS design significantly eliminates the accumulation of lubricant and removes whatever lubricant does accumulate by use of a shallow dam at the trailing edge. In addition, a junction between a down-track channel and a cross-track channel directs airflow towards a center pad in which a transducer is embedded so that the pressure at the pad is enhanced even under high altitude conditions. The slider ABS is divided into two portions by a transverse deep air channel, but the channel is bridged by the cross-track channel which crosses the deep air channel with sides of unequal height. This dual height bridge allows variations in skew angle to be compensated so that pressure variations across the disk tracks are significantly reduced.

摘要翻译： 滑块通过具有ABS形貌的三步离子研磨工艺形成，其在亚纳米飞行高度处提供空气动力学稳定性。 ABS设计显着地消除了润滑剂的积聚，并且通过在后缘使用浅水坝去除了积聚的任何润滑剂。 此外，下轨道和跨轨道之间的接合处将气流引向中心衬垫，在中心衬垫中嵌入换能器，使得即使在高海拔条件下，衬垫处的压力也得到提高。 滑块ABS通过横向深空气通道分成两部分，但是通道由跨越高空气通道的横向通道桥接，其侧面不等高。 这种双高度桥允许补偿偏斜角的变化，使得磁盘轨道上的压力变化显着减小。

公开(公告)号：US08139306B2

公开(公告)日：2012-03-20

申请号：US10982604

申请日：2004-11-04

申请人： Zhu Feng ,  Xiaofeng Zhang ,  Ellis T. Cha

发明人： Zhu Feng ,  Xiaofeng Zhang ,  Ellis T. Cha

IPC分类号： G11B21/02 ,  G11B27/36 ,  G01R27/26

CPC分类号： G11B5/455 ,  G11B5/40 ,  G11B5/4555 ,  G11B5/6017 ,  G11B5/6058

摘要： A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head.

摘要翻译： 公开了一种用于测量诸如磁盘的磁头和磁存储介质之间的调制的系统和方法。 在给定的飞行高度处，磁读/写头位于磁存储介质上方。 磁读/写头读取来自磁存储介质的信号。 测试仪测量通过滑动器的磁读/写磁头与磁存储介质之间的交流电流。 计算机然后可以基于交流电流计算磁读/写头的调制。 可以施加到头部的DC电压以降低磁头的飞行高度。

公开(公告)号：US07969685B2

公开(公告)日：2011-06-28

申请号：US12228496

申请日：2008-08-13

申请人： Xinjiang Shen ,  Zhu Feng ,  Ellis Cha ,  Robert Chu

发明人： Xinjiang Shen ,  Zhu Feng ,  Ellis Cha ,  Robert Chu

IPC分类号： G11B5/147

CPC分类号： G11B5/6005

摘要： A DFH (Dynamic Flying Height) type slider ABS design has a stable flying height and a DFH efficiency that is uniform across the entire disk surface. These properties are a result of embedding the read/write head and heater in a trapezoidally bridged micro-pad having a very small surface area. The micro-pad is surrounded by a wing-like structure that projects from a central rail in the ABS and the micro pad is connected to an inner edge of that structure by a bridge having a trapezoidal shape. The trapezoidal shape responds effectively to variations in air flow direction and pressure point as the slider moves across the disk surface and, as a result, provides the uniform DFH efficiency. At the same time, the projecting wings and adjacent topology help to direct the airflow around the micro-pad and provide the stable flying height.

摘要翻译： DFH（动态飞行高度）型滑块ABS设计具有稳定的飞行高度和整个磁盘表面均匀的DFH效率。 这些性质是将读/写头和加热器嵌入具有非常小的表面积的梯形桥接微垫中的结果。 微垫被由ABS中的中心轨道突出的翼状结构围绕，并且微型垫通过具有梯形形状的桥连接到该结构的内边缘。 当滑块越过盘表面时，梯形形状有效地响应于空气流动方向和压力点的变化，结果提供了均匀的DFH效率。 同时，突出的机翼和相邻的拓扑结构有助于引导微型焊盘周围的气流，并提供稳定的飞行高度。

公开(公告)号：US20080106818A1

公开(公告)日：2008-05-08

申请号：US11594343

申请日：2006-11-07

申请人： Ellis T. Cha ,  Zhu Feng ,  Xinjiang Shen ,  Sindy Yeung

发明人： Ellis T. Cha ,  Zhu Feng ,  Xinjiang Shen ,  Sindy Yeung

IPC分类号： G11B33/14 ,  G11B5/60

CPC分类号： G11B5/6082 ,  G11B5/40 ,  G11B5/6064 ,  Y10T29/49041

摘要： An embodiment of the present invention is an ABS design with a pitch ladder feature. This embodiment has an air flow squeezing channel which consists of one airflow blocker and three etching steps. The airflow blocker can be used to limit the incoming air flow from the leading edge of the ABS. Additionally, the embodiment contains an air channel that reduces altitude sensitivity by channeling air at the inner diameter into a sub-ambient pressure cavity.

摘要翻译： 本发明的实施例是具有螺距梯特征的ABS设计。 该实施例具有由一个气流阻塞器和三个蚀刻步骤组成的气流挤压通道。 气流阻塞器可用于限制从ABS的前缘进入的空气流。 此外，该实施例包含通过将内径处的空气引导到次环境压力腔中而降低高度感度的空气通道。

公开(公告)号：US08018682B2

公开(公告)日：2011-09-13

申请号：US12804946

申请日：2010-08-02

申请人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

发明人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

IPC分类号： G11B5/82

CPC分类号： G11B5/3106 ,  C23C14/024 ,  C23C14/0605 ,  C23C14/0676 ,  G11B5/3163 ,  G11B5/72 ,  G11B5/8408 ,  G11B23/0064 ,  Y10T29/49043 ,  Y10T428/1164

摘要： A magnetic disk is protected by a bilayer. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlOxNy or MezAlOxNy where Mez symbolizes Tiz, Siz or Crz and where x, y and z can be varied within the formation process. By adjusting the values of x and y the adhesion underlayer contributes to such qualities of the protective bilayer as stress compensation, chemical and mechanical stability and low electrical conductivity. Various methods of forming the underlayer are provided, including reactive ion sputtering, plasma assisted chemical vapor deposition, pulsed laser deposition and plasma immersion ion implantation.

摘要翻译： 磁盘由双层保护。 双层形成为粘合增强底层和保护性金刚石碳（DLC）覆盖层。 底层由具有通式AlOxNy或MezAlOxNy的铝或合金化氧化铝铝形成，其中Mez表示Tiz，Siz或Crz，其中x，y和z可以在形成过程中变化。 通过调整x和y的值，粘合剂底层有助于保护层的质量，如应力补偿，化学和机械稳定性以及低导电性。 提供了形成底层的各种方法，包括反应离子溅射，等离子体辅助化学气相沉积，脉冲激光沉积和等离子体浸入离子注入。

公开(公告)号：US07327535B2

公开(公告)日：2008-02-05

申请号：US10434949

申请日：2003-05-08

申请人： Zhu Feng ,  Ellis Cha

发明人： Zhu Feng ,  Ellis Cha

IPC分类号： G11B5/187 ,  G11B5/60

CPC分类号： B82Y30/00 ,  G11B5/255 ,  Y10T428/11

摘要： A system and method for providing corrosion protection for a magnetic read/write head is disclosed. A monolayer surface coating is applied to cover those portions of the under layer of a magnetic read/write head not already covered by a previously applied diamond-like coating. This allows for a thinner diamond like coating than previously applied in the art. The monolayer surface coating can be a self-assembled monolayer, such as an organosilicon for hydroxylated surfaces or carboxylic acids for aluminum or other metal oxides. Alternatively, the monolayer surface coating can be directly applied to the under layer with no diamond-like coating being present. The monolayer surface coating can be applied by a surface immersion process or by a vacuum coating process.

摘要翻译： 公开了一种用于为磁读/写头提供防腐蚀的系统和方法。 施加单层表面涂层以覆盖未被先前施加的类金刚石涂层覆盖的磁读/写头的下层的那些部分。 这允许比本领域中先前应用的更薄的金刚石类涂层。 单层表面涂层可以是自组装单层，例如羟基化表面的有机硅或铝或其它金属氧化物的羧酸。 或者，单层表面涂层可以直接施加到底层，而不存在类金刚石涂层。 单层表面涂层可以通过表面浸渍法或真空镀膜法施加。

公开(公告)号：US20060176596A1

公开(公告)日：2006-08-10

申请号：US11399284

申请日：2006-04-06

申请人： Zhu Feng ,  Ellis Cha ,  Xiaofeng Zhang

发明人： Zhu Feng ,  Ellis Cha ,  Xiaofeng Zhang

IPC分类号： G11B27/36

CPC分类号： G11B5/60

摘要： A system and method for measuring and neutralizing the electrical charge at the interface of a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A surface treatment material is applied to the magnetic head. The surface treatment material matches the medium surface material on the surface of the magnetic storage medium. The surface treatment material on the magnetic read/write head may be a fluorinated carbon, such as a Fomblin Z-derivative, perfluoro alkyl trichlorosilane, a FC-722, or a fluorinated polymer. The surface treatment material can be applied to the magnetic head by a vapor deposition process or by a liquid immersion process. The charge on the head-disk interface can be measured by applying varying external charges to the head while reading a signal previously written to the disk.

摘要翻译： 公开了一种用于测量和中和磁头和诸如磁盘的磁存储介质的界面处的电荷的系统和方法。 将表面处理材料施加到磁头。 表面处理材料与磁性存储介质表面上的介质表面材料相匹配。 磁读写头上的表面处理材料可以是氟化碳，如Fomblin Z衍生物，全氟烷基三氯硅烷，FC-722或氟化聚合物。 表面处理材料可以通过气相沉积法或液浸法施加到磁头上。 头磁盘接口上的电荷可以通过在读取先前写入磁盘的信号时向磁头施加变化的外部电荷来测量。