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    Contact planar magnetoresistive head
    2.
    发明授权
    Contact planar magnetoresistive head 失效
    接触平面磁阻头

    公开(公告)号：US06535361B2

    公开(公告)日：2003-03-18

    申请号：US09795954

    申请日：2001-02-28

    Applicant: William C. Cain ,  Michael E. Devillier ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Dimitre A. Latev

    Inventor： William C. Cain ,  Michael E. Devillier ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Dimitre A. Latev

    IPC: G11B539

    CPC classification number: G11B5/6005 ,  G11B5/1278 ,  G11B5/3176 ,  G11B5/3183 ,  G11B5/39 ,  G11B5/3967 ,  G11B5/40 ,  G11B5/484 ,  G11B21/02

    Abstract: A hard disk drive head operates in close proximity and dynamic contact with a rapidly spinning rigid disk surface, the head including a transducer with a magnetically permeable path between a poletip disposed adjacent to the disk surface and a magnetoresistive (MR) sensor situated outside the range of thermal noise generated by the surface contact. The magnetically permeable path is the same as that used to write data to the disk, eliminating errors that occur in conventional transducers having MR sensors at a separate location from the writing poletips. Moreover, the magnetically permeable path is preferably formed in a low profile, highly efficient “planar” loop that allows for manufacturing tolerances in throat height and wear of the terminal poletips from disk contact without poletip saturation or poletip smearing. The MR layer is formed in one of the first manufacturing steps atop the substrate, so that the MR layer has a relatively uniform planar template that is free from contaminants. A preferred embodiment has a laminated yoke for improved high frequency efficiency, with the MR element situated between the yoke lamina for improved sensitivity.

    Abstract translation: 一个硬盘驱动器头靠近并与快速旋转的刚性盘表面动态接触，该头部包括一个换能器，该传感器具有一个位于邻近磁盘表面的poletip之间的磁导通路径，以及位于该范围外的磁阻（MR）传感器 由表面接触产生的热噪声。 导磁通路与用于将数据写入磁盘的磁导通路径相同，消除了在与写入引脚分开的位置处具有MR传感器的常规传感器中发生的错误。 此外，磁导通路优选地形成为低轮廓，高效的“平面”环路，其允许制造喉部高度的公差和终端小弹簧从盘接触的磨损，而不会引起耳波饱和或poletip拖尾。 MR层在基板顶部的第一制造步骤之一中形成，使得MR层具有不含污染物的相对均匀的平面模板。 优选实施例具有用于提高高频效率的层叠轭，MR元件位于轭层之间，以提高灵敏度。

    Contact planar magnetoresistive head
    4.
    发明授权
    Contact planar magnetoresistive head 失效
    接触平面磁阻头

    公开(公告)号：US06198607B1

    公开(公告)日：2001-03-06

    申请号：US08725296

    申请日：1996-10-02

    Applicant: William C. Cain ,  Michael E. Devillier ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Dimitre A. Latev

    Inventor： William C. Cain ,  Michael E. Devillier ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Dimitre A. Latev

    IPC: G11B539

    CPC classification number: G11B5/6005 ,  G11B5/1278 ,  G11B5/3176 ,  G11B5/3183 ,  G11B5/39 ,  G11B5/3967 ,  G11B5/40 ,  G11B5/484 ,  G11B21/02

    Abstract: A hard disk drive head operates in close proximity and dynamic contact with a rapidly spinning rigid disk surface, the head including a transducer with a magnetically permeable path between a poletip disposed adjacent to the disk surface and a magnetoresistive (MR) sensor situated outside the range of thermal noise generated by the surface contact. The magnetically permeable path is the same as that used to write data to the disk, eliminating errors that occur in conventional transducers having MR sensors at a separate location from the writing poletips. Moreover, the magnetically permeable path is preferably formed in a low profile, highly efficient “planar” loop that allows for manufacturing tolerances in throat height and wear of the terminal poletips from disk contact without poletip saturation or poletip smearing. The MR layer is formed in one of the first manufacturing steps atop the substrate, so that the MR layer has a relatively uniform planar template that is free from contaminants. A preferred embodiment has a laminated yoke for improved high frequency efficiency, with the MR element situated between the yoke lamina for improved sensitivity.

    Abstract translation: 一个硬盘驱动器头靠近并与快速旋转的刚性盘表面动态接触，该头部包括一个换能器，该传感器具有一个位于邻近磁盘表面的poletip之间的磁导通路径，以及位于该范围外的磁阻（MR）传感器 由表面接触产生的热噪声。 导磁通路与用于将数据写入磁盘的磁导通路径相同，消除了在与写入引脚分开的位置处具有MR传感器的常规传感器中发生的错误。 此外，磁导通路优选地形成为低轮廓，高效的“平面”环路，其允许制造喉部高度的公差和终端小弹簧从盘接触的磨损，而不会引起耳波饱和或poletip拖尾。 MR层在基板顶部的第一制造步骤之一中形成，使得MR层具有不含污染物的相对均匀的平面模板。 优选实施例具有用于提高高频效率的层叠轭，MR元件位于轭层之间，以提高灵敏度。

    Method of and apparatus for defining disk tracks in magnetic recording media
    5.
    发明授权
    Method of and apparatus for defining disk tracks in magnetic recording media 有权
    在磁记录介质中定义磁盘轨迹的方法和装置

    公开(公告)号：US06671235B1

    公开(公告)日：2003-12-30

    申请号：US09536867

    申请日：2000-03-27

    Applicant: Andrew M. Hawryluk ,  Robert D. Hempstead ,  David A. Markle

    Inventor： Andrew M. Hawryluk ,  Robert D. Hempstead ,  David A. Markle

    IPC: G11B1300

    CPC classification number: G11B5/82 ,  G11B5/012 ,  G11B5/59633 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

    Abstract: A method of, and apparatus for, defining disk tracks in magnetic recording media. The track-writing apparatus (20) is capable of forming tracks (340) with a track width (TW) and track spaces (350) with a space width (SW) on a magnetic media disk (70) having an upper surface (70S), wherein the disk comprises a magnetic medium with a thermal diffusion length (X). The apparatus comprises, in order along an optical axis (A1), a laser light source (30) capable of providing a pulsed laser light beam (B1), a light pipe (32), and illumination shaping optical system (40) that provides substantially uniform illumination over an exposure region (ER), and a phase plate (60) having a phase grating (210) with a grating period (p), arranged proximate and substantially parallel to the upper surface of the disk so as to form an periodic irradiance distribution (380) at the surface of the disk when the phase plate is illuminated with the exposure region. The irradiance distribution is capable of heating one or more regions of the disk to beyond the Curie temperature of the magnetic media. A method of defining the disk tracks using Spatial Period Division (SPD) with the track writing apparatus described above by forming closed annular demagnetized spaces in a periodic magnetized pattern (300) formed in the disk is also disclosed.

    Abstract translation: 一种用于在磁记录介质中定义磁盘轨迹的方法和设备。 轨道写入装置（20）能够在具有上表面（70S）的磁性介质盘（70）上形成具有轨道宽度（TW）的轨道（340）和具有空间宽度（SW）的轨道空间（350） ），其中盘包括具有热扩散长度（X）的磁性介质。 该装置沿着光轴（A1）依次包括能够提供脉冲激光束（B1）的激光源（30），光管（32）和照明整形光学系统（40），其提供 以及具有光栅周期（p）的相位光栅（210）的相位板（60），该相位板（60）布置成与盘的上表面接近且基本平行，从而形成 当相位板用曝光区域照亮时，盘的表面处的周期性辐照度分布（380）。 辐照度分布能够将盘的一个或多个区域加热到超过磁性介质的居里温度。 还公开了通过在形成在盘中的周期性磁化图案（300）中形成闭合的环形消磁空间来定义使用上述轨道写入装置的空间周期分割（SPD）的盘轨迹的方法。

    Planar magnetic ring head for contact recording with a rigid disk
    6.
    发明授权
    Planar magnetic ring head for contact recording with a rigid disk 失效
    平面磁环头，用于与刚性盘接触记录

    公开(公告)号：US06493191B1

    公开(公告)日：2002-12-10

    申请号：US08528890

    申请日：1995-09-15

    Applicant: William C. Cain ,  Richard D. Anderson ,  Michael A. Baldwinson ,  Keith R. Berding ,  Michael E. Devillier ,  Garrett A. Garrettson ,  Randolph S. Gluck ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Kwang K. Kim ,  Dimitre A. Latev ,  Alexander P. Payne ,  David D. Roberts

    Inventor： William C. Cain ,  Richard D. Anderson ,  Michael A. Baldwinson ,  Keith R. Berding ,  Michael E. Devillier ,  Garrett A. Garrettson ,  Randolph S. Gluck ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Darren T. Imai ,  Kwang K. Kim ,  Dimitre A. Latev ,  Alexander P. Payne ,  David D. Roberts

    IPC: G11B5187

    CPC classification number: G11B5/3163 ,  G11B5/3106 ,  G11B5/3183

    Abstract: A transducer for a hard disk drive system has a planar magnetic core and a pair of poletips that project transversely from the core for sliding contact with the disk during reading and writing. The transducer is formed entirely of thin films in the shape of a low profile table having three legs that slide on the disk, the poletips being exposed at a bottom of one of the legs for high resolution communication with the disk, the throat height of the poletips affording sufficient tolerance to allow for wear. The legs elevate the transducer from the disk sufficiently to minimize lifting by a thin air layer that moves with the spinning disk which, in combination with the small size of the thin film head allows a low load and a flexible beam and gimbal to hold the transducer to the disk. The transducer includes a loop shaped core of magnetic material that ends at the poletips, the core extending further parallel than perpendicular to the disk surface and preferably being formed of a plurality of slightly spaced ribbons of magnetic material in order to increase high frequency permeance. A high magnetic saturation layer may be formed adjoining the gap in at least the trailing poletip, in order to avoid saturation at the poletips during writing. The dimensions of the yoke adjacent to the poletips are also designed to avoid saturation at the poletips by saturating at a lower flux in the yoke than the poletips. The close relationship between the transducer and the media of the disk affords high density magnetic data storage and retrieval.

    Abstract translation: 用于硬盘驱动系统的换能器具有平面磁芯和一对从芯体横向突出的小纸片，用于在读写期间与盘滑动接触。 传感器完全由薄板形成，其具有在盘上滑动的三条腿的小型表，其中一条腿露出在一条腿的底部，用于与盘的高分辨率通信，喉部的高度 小腿提供足够的耐受性以允许磨损。 这些腿将传感器从盘上提升到足以最小化由旋转盘移动的薄空气层的提升，其与小尺寸的薄膜头允许低负载并且柔性梁和万向节保持换能器 到磁盘。 换能器包括磁性材料的环形磁芯，其在端部终止，芯体比垂直于磁盘表面进一步平行延伸，并且优选地由多个稍微间隔的磁性材料带形成，以便增加高频磁导率。 至少可以在至少尾部poletip中形成邻接间隙的高磁饱和层，以避免写入期间在poletips处的饱和。 靠近小翼片的轭的尺寸也被设计成通过在轭中的低通量饱和而不是poletips饱和。 传感器与磁盘介质之间的紧密关系提供了高密度的磁数据存储和检索。

    Low friction sliding hard disk drive system
    8.
    发明授权
    Low friction sliding hard disk drive system 失效
    低摩擦滑动硬盘驱动系统

    公开(公告)号：US5949612A

    公开(公告)日：1999-09-07

    申请号：US515140

    申请日：1995-08-15

    Applicant: Christopher S. Gudeman ,  Michael H. Azarian ,  Michael A. Baldwinson ,  Keith R. Berding ,  Kaynam Chun ,  Garrett A. Garrettson ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Dimitre A. Latev ,  Mark A. Lauer

    Inventor： Christopher S. Gudeman ,  Michael H. Azarian ,  Michael A. Baldwinson ,  Keith R. Berding ,  Kaynam Chun ,  Garrett A. Garrettson ,  Harold J. Hamilton ,  Robert D. Hempstead ,  Dimitre A. Latev ,  Mark A. Lauer

    IPC: G11B5/31 ,  G11B5/73 ,  G11B5/84 ,  B05D5/12

    CPC classification number: G11B5/72 ,  G11B5/3106 ,  G11B5/7325 ,  G11B5/8404 ,  Y10S428/90

    Abstract: A operationally contacting hard disk drive system has reduced friction due to lower capillary adhesion between the disk surface and a transducer in a substantially continuous sliding relationship with the surface. The disk surface has an adhesion-reducing texture that includes a microscopic RMS roughness in a range between about 1.5 and 5.5 nanometers, or a number of asperities having a mean plane to peak height in a range between about 6 and 50 nanometers. The roughness may increase in a radially graded fashion to compensate for the increased linear velocity and concomitant frictional power loss near the outer diameter of the disk. It is important that the uppermost reaches of the textured surface are smooth but not flat in order to obtain lasting low friction operation, which is accomplished by constructing the surface with a highest approximately one percent having an average radius of curvature in a range between 2 microns and 100 microns. An area of the slider in apparent contact with the disk surface is preferably less than 1000 square microns, and a ratio between this nominal area and the mean to peak height is less than 0.3 meters. The slider may also include a substantial thickness of partially wetting material in contact with the disk, or may alternatively be textured with deep grooves or materials having differing wear rates, in order to provide reduced frictional adhesion despite wear of the slider.

    Abstract translation: 操作上接触的硬盘驱动系统由于在与表面基本上连续的滑动关系中的盘表面和换能器之间较低的毛细管粘附力而减少了摩擦。 盘表面具有减粘纹理，其包括在约1.5和5.5纳米之间的范围内的微观RMS粗糙度，或者具有在约6和50纳米之间的范围内的平均平面至峰高的数量的凹凸。 粗糙度可以以径向渐变的方式增加，以补偿在盘的外径附近的增加的线速度和伴随的摩擦功率损耗。 重要的是纹理表面的最上层是光滑的而不是平坦的，以便获得持久的低摩擦操作，这是通过将平均曲率半径在2微米之间的范围内构造最高约百分之一的表面来实现的 和100微米。 与盘表面明显接触的滑块的面积优选地小于1000平方微米，并且该标称面积与平均高峰之间的比例小于0.3米。 滑块还可以包括与盘相接触的部分润湿材料的相当厚度，或者可替代地使用具有不同磨损率的深沟槽或材料进行纹理化，以便尽管滑块的磨损来提供降低的摩擦粘附。

    Thin film head having negative magnetostriction
    9.
    发明授权
    Thin film head having negative magnetostriction 失效
    具有负磁致伸缩的薄膜头

    公开(公告)号：US4242710A

    公开(公告)日：1980-12-30

    申请号：US7274

    申请日：1979-01-29

    Applicant: Robert D. Hempstead ,  James B. Money

    Inventor： Robert D. Hempstead ,  James B. Money

    IPC: G11B5/31 ,  G11B5/12 ,  G11B5/30

    CPC classification number: G11B5/3109

    Abstract: A thin film inductive head is formed with nickel-iron binary alloy or nickel-iron-X ternary alloy pole pieces characterized by negative magnetostriction having a saturation magnetostriction coefficient in the range of -1.times.10.sup.-6 to -5.times.10.sup.-6.

    Abstract translation: 用镍铁二元合金或镍 - 铁-x三元合金极片形成薄膜感应头，其特征在于具有在-1×10 -6至-5×10 -6范围内的饱和磁致伸缩系数的负磁致伸缩。

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