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    Planar magnetic ring head for contact recording with a rigid disk
    1.
    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

    申请人： 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

    发明人： 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分类号： G11B5187

    CPC分类号： G11B5/3163 ,  G11B5/3106 ,  G11B5/3183

    摘要： 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.

    摘要翻译： 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
    5.
    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

    申请人： 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

    发明人： 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分类号： G11B5/31 ,  G11B5/73 ,  G11B5/84 ,  B05D5/12

    CPC分类号： G11B5/72 ,  G11B5/3106 ,  G11B5/7325 ,  G11B5/8404 ,  Y10S428/90

    摘要： 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.

    摘要翻译： 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。

    Contact planar magnetoresistive head
    6.
    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

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

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

    IPC分类号： G11B539

    CPC分类号： G11B5/6005 ,  G11B5/1278 ,  G11B5/3176 ,  G11B5/3183 ,  G11B5/39 ,  G11B5/3967 ,  G11B5/40 ,  G11B5/484 ,  G11B21/02

    摘要： 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.

    摘要翻译： 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
    7.
    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

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

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

    IPC分类号： G11B539

    CPC分类号： G11B5/6005 ,  G11B5/1278 ,  G11B5/3176 ,  G11B5/3183 ,  G11B5/39 ,  G11B5/3967 ,  G11B5/40 ,  G11B5/484 ,  G11B21/02

    摘要： 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.

    摘要翻译： 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。