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    Planar magnetic ring head for contact recording with a rigid disk
    3.
    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。

    Contact planar magnetoresistive head
    5.
    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
    6.
    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。

    Planar recording head having formed yokes
    7.
    发明授权
    Planar recording head having formed yokes 失效
    具有形成磁轭的平面记录头

    公开(公告)号：US6008969A

    公开(公告)日：1999-12-28

    申请号：US993719

    申请日：1997-12-18

    申请人： Darren T. Imai ,  David D. Roberts ,  Dimitre A. Latev ,  William C. Cain

    发明人： Darren T. Imai ,  David D. Roberts ,  Dimitre A. Latev ,  William C. Cain

    IPC分类号： G11B5/31 ,  G11B5/60

    CPC分类号： G11B5/3183 ,  G11B5/3163

    摘要： A planar thin film magnetic head comprises an insulating substrate, a pair of insulating pedestals formed on the substrate, a top magnetic yoke having a central portion disposed over the substrate and having opposite ends supported on each of the pedestals. A conductor is provided over the top yoke central portion, and an insulating layer is disposed between the conductor and the top magnetic yoke. A bottom magnetic yoke is disposed over the conductor and has a gap in a central portion and opposite ends in contact with the top yoke ends.

    摘要翻译： 平面薄膜磁头包括绝缘基板，形成在基板上的一对绝缘基座，顶部磁轭，其中心部分设置在基板上并具有支撑在每个基座上的相对端部。 导体设置在顶部磁轭中心部分之上，绝缘层设置在导体和顶部磁轭之间。 底部磁轭设置在导体上方，并且在中心部分具有间隙，并且相对端部与顶部磁轭端部接触。

    Yoke spin valve MR read head
    8.
    发明授权
    Yoke spin valve MR read head 失效
    轭式旋转阀MR读头

    公开(公告)号：US5493467A

    公开(公告)日：1996-02-20

    申请号：US364913

    申请日：1994-12-27

    申请人： William C. Cain ,  Robert Fontana ,  Hugo A. Santini ,  Mason L. Williams, III

    发明人： William C. Cain ,  Robert Fontana ,  Hugo A. Santini ,  Mason L. Williams, III

    IPC分类号： G11B5/00 ,  G11B5/39 ,  G11B5/147 ,  G11B5/235

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/0016 ,  G11B2005/3996

    摘要： The present invention is a yoke spin valve MR read head which electrically connects a spin valve MR sensor to spaced apart yoke portions. First and second yoke pieces are electrically connected at a head surface and are insulated from one another at a back gap which is remotely located from the head surface. The first yoke piece has a break which divides it into first and second portions which are spaced from one another. The spin valve MR sensor is located within this break and electrically interconnects the first and second portions of the first yoke piece. First and second leads are connected to the first and second yoke pieces respectively and receive a current from a current source for applying a sense current to the spin valve MR sensor via the first and second yoke pieces. When a magnetic medium is moved adjacent the head surface of the read head the yoke pieces serve as conductors for transmitting sense current to the spin valve MR sensor as well as functioning as a flux guide. Flux incursions propagated from the magnetic medium to the spin valve MR sensor via the yoke cause relative rotations between directions of magnetic moments of a pinned layer and a free layer which correspond to signals which can be processed by a signal processing device. The signal strength of the yoke spin valve MR sensor is superior to an anisotropic MR sensor and is easier to fabricate.

    摘要翻译： 本发明是将自旋阀MR传感器与间隔开的磁轭部分电连接的磁轭自旋阀MR读头。 第一和第二轭片在头表面处电连接并且在远离头表面的后间隙处彼此绝缘。 第一轭片具有将其分成彼此间隔开的第一和第二部分的断裂。 自旋阀MR传感器位于该断裂之内并电互连第一轭片的第一和第二部分。 第一和第二引线分别连接到第一和第二磁轭，并且从电流源接收电流，用于经由第一和第二磁轭将感测电流施加到自旋阀MR传感器。 当磁性介质在读头的头表面附近移动时，轭件用作用于将感应电流传递到自旋阀MR传感器以及用作磁通引导件的导体。 通过轭从磁介质传播到自旋阀MR传感器的磁通入侵引起与被信号处理装置处理的信号相对应的钉扎层和自由层的磁矩方向之间的相对旋转。 轭自旋阀MR传感器的信号强度优于各向异性MR传感器，并且制造更容易。

    Magnetoresistive structure with contiguous junction hard bias design with low lead resistance
    9.
    发明授权
    Magnetoresistive structure with contiguous junction hard bias design with low lead resistance 失效
    具有连续接合硬偏置设计，具有低引线电阻的磁阻结构

    公开(公告)号：US5438470A

    公开(公告)日：1995-08-01

    申请号：US242457

    申请日：1994-05-13

    申请人： Durga Ravipati ,  Yong Shen ,  William C. Cain

    发明人： Durga Ravipati ,  Yong Shen ,  William C. Cain

    IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/33

    CPC分类号： G11B5/399

    摘要： A magnetoresistive read transducer includes a magnetoresistive (MR) layer having end regions spaced by a central active regions. A pair of hard-magnetic layers provide the longitudinal magnetic bias to the magnetoresistive layer. Each of the hard-magnetic layers is disposed in contact with one of the end regions of the magnetoresistive layer. In addition, a pair of electrical leads provide the bias current to the magnetoresistive layer. Each of the electrical leads is also disposed in contact with one of the end regions of the magnetoresistive layer. This arrangement enable the transducer of the present invention with the most optimal design. In essence, electrical current directly passes through the central active region of the magnetoresistive layer via the electrical leads as a low electrical resistance path. Magnetic flux of the longitudinal bias directly passes through the central active region of the magnetoresistive layer with a reduced probability of magnetic discontinuity.

    摘要翻译： 磁阻读取换能器包括具有由中心有源区间隔的端部区域的磁阻（MR）层。 一对硬磁性层向磁阻层提供纵向磁偏置。 每个硬磁性层被设置成与磁阻层的一个端部区域接触。 此外，一对电引线向磁阻层提供偏置电流。 每个电引线也设置成与磁阻层的一个端部区域接触。 这种布置使得本发明的换能器具有最佳的设计。 本质上，电流作为低电阻通路经由电引线直接通过磁阻层的中心有源区。 纵向偏置的磁通直接通过磁阻层的中心有源区，磁性不连续的概率降低。

    Peripheral data storage system with multi-state user display
    10.
    发明授权
    Peripheral data storage system with multi-state user display 有权
    具有多状态用户显示的外围数据存储系统

    公开(公告)号：US07302501B1

    公开(公告)日：2007-11-27

    申请号：US10815516

    申请日：2004-03-31

    申请人： William C. Cain ,  Kevin W. McLaughlin ,  Barry L. Klein

    发明人： William C. Cain ,  Kevin W. McLaughlin ,  Barry L. Klein

    IPC分类号： G06F3/00 ,  G06F13/12

    CPC分类号： G06F11/328

    摘要： A method of displaying states of a peripheral data storage system (PDSS) comprising a data storage device, a data storage system controller, a user-actuated signaling subsystem, a user display subsystem adapted to display the states, and a peripheral data storage controller host interface adapted for communication with a host system. The method includes determining a state of the PDSS; displaying a first display state via the user display subsystem if the PDSS is in an idle state; displaying a second display state via the user display subsystem if the PDSS is in a state corresponding to receiving a signal from the user-actuated signaling subsystem; displaying a third display state via the user display subsystem if the PDSS is in a dynamically active state; and displaying a fourth display state via the user display subsystem if the PDSS is in an off state.

    摘要翻译： 一种显示外围数据存储系统（PDSS）的状态的方法，包括数据存储设备，数据存储系统控制器，用户致动的信令子系统，适于显示状态的用户显示子系统以及外围数据存储控制器主机 接口，适于与主机系统进行通信。 该方法包括确定PDSS的状态; 如果PDSS处于空闲状态，则经由用户显示子系统显示第一显示状态; 如果PDSS处于与从用户启动的信令子系统接收信号相对应的状态，则经由用户显示子系统显示第二显示状态; 如果PDSS处于动态激活状态，则经由用户显示子系统显示第三显示状态; 以及如果所述PDSS处于关闭状态，则经由所述用户显示子系统显示第四显示状态。