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    Discrete step stabilization of narrow-track AMR read sensors
    1.
    发明授权
    Discrete step stabilization of narrow-track AMR read sensors 有权
    窄轨AMR读取传感器的离散步进稳定

    公开(公告)号：US07256969B1

    公开(公告)日：2007-08-14

    申请号：US10862287

    申请日：2004-06-07

    申请人： Carl Stephen Arnold ,  Edward Virgil Denison ,  Carl Anthony Helms ,  Stein Klevdal ,  Kevin D. McKinstry ,  Mark Lee Watson

    发明人： Carl Stephen Arnold ,  Edward Virgil Denison ,  Carl Anthony Helms ,  Stein Klevdal ,  Kevin D. McKinstry ,  Mark Lee Watson

    IPC分类号： G11B5/127

    CPC分类号： G11B5/398 ,  G01R33/09 ,  G01R33/096 ,  G11B5/3906 ,  G11B5/3932

    摘要： A method and system are provided for implementing discrete step stabilization of AMR read sensors in tape or disk drives. In one implementation, a plurality of discrete step stabilizers and AMR read sensor elements are arranged with a rotational symmetry coupled with a plane inversion for an odd number of steps, and no inversion for an even number of steps. Preferably, the steps are oriented at 45 degrees, or approximately parallel to the desired bias direction. For relatively narrow track widths (e.g., approximately 5 microns), the edges of the sensor element nearest the permanent magnets are especially important to stabilize. Therefore, in one implementation, an edge of a stabilizer preferably intersects the edge of the sensor element at one half of the stripe height. Also, the rising and falling edges of the stabilizers do not always have the same slope. In order to compensate for the different slopes of a stabilizer's edges, the rising and falling edges of a stabilizer's pattern are interchanged by a “stabilizer phase” transformation to produce the complement (phase conjugate) of the stabilizer pattern. As such, if a single rising edge of a stabilizer pattern intersects the center of a sensor element, the “stabilizer phase” transformation changes this structure to a single falling edge that intersects the center of the sensor element.

    摘要翻译： 提供了一种方法和系统，用于实现磁带或磁盘驱动器中AMR读取传感器的离散步进稳定。 在一个实施方案中，多个离散步进稳定器和AMR读取传感器元件被布置成与奇数步骤的平面反转耦合的旋转对称，并且对于偶数步骤而言没有反转。 优选地，步骤定向成45度，或大致平行于期望的偏压方向。 对于相对窄的轨道宽度（例如，大约5微米），最靠近永磁体的传感器元件的边缘对于稳定是特别重要的。 因此，在一个实施方案中，稳定器的边缘优选地在条纹高度的一半处与传感器元件的边缘相交。 此外，稳定器的上升和下降沿不总是具有相同的斜率。 为了补偿稳定器边缘的不同斜率，稳定器图案的上升和下降边缘通过“稳定器相位”变换互换，以产生稳定器图案的补码（相位共轭）。 因此，如果稳定器图案的单个上升沿与传感器元件的中心相交，则“稳定器相位”变换将该结构改变为与传感器元件的中心相交的单个下降沿。

    Apparatus and method for step-stabilization of GMR-based read sensors
    3.
    发明授权
    Apparatus and method for step-stabilization of GMR-based read sensors 有权
    基于GMR的读取传感器的步进稳定装置和方法

    公开(公告)号：US07118814B1

    公开(公告)日：2006-10-10

    申请号：US10791257

    申请日：2004-03-02

    申请人： Carl Stephen Arnold ,  Edward Virgil Denison ,  John P. Nibarger ,  Carl A. Helms

    发明人： Carl Stephen Arnold ,  Edward Virgil Denison ,  John P. Nibarger ,  Carl A. Helms

    IPC分类号： G11B5/127 ,  G11B5/39

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T428/1143 ,  Y10T428/1171

    摘要： An apparatus and method for step-stabilization of giant magnetoresistive (GMR) based read heads are provided. With the apparatus and method, gratings or periodic structures are generated in the underlayer of the magnetoresistive (MR) sensor stack and the edges, or “steps”, in these structures are the magnetically active features. These “steps” are oriented approximately parallel to the desired bias direction and provide a restoring force towards the bias direction for any perturbations, whether intrinsic or extrinsic. In the case of a GMR sensor, where the easy axis is parallel to the permanent magnet set direction, these stabilizer steps are oriented parallel to the magnetization direction of the permanent magnets.

    摘要翻译： 提供了一种用于基于巨磁阻（GMR）的读头的步进稳定的装置和方法。 利用该装置和方法，在磁阻（MR）传感器堆叠的底层中产生光栅或周期性结构，并且在这些结构中的边缘或“台阶”是磁性活动特征。 这些“步骤”大致平行于期望的偏置方向定向，并且对于任何扰动（无论是内在的还是外在的）提供朝向偏置方向的恢复力。 在容易轴平行于永磁体设定方向的GMR传感器的情况下，这些稳定器台阶与永久磁铁的磁化方向平行。

    Reduction of contact noise in single-ended magnetoresistive read elements
    5.
    发明授权
    Reduction of contact noise in single-ended magnetoresistive read elements 有权
    降低单端磁阻读取元件的接触噪声

    公开(公告)号：US07050272B1

    公开(公告)日：2006-05-23

    申请号：US10334545

    申请日：2002-12-30

    申请人： Kevin Dale McKinstry ,  Carl Stephen Arnold ,  Yi Shung Chaug

    发明人： Kevin Dale McKinstry ,  Carl Stephen Arnold ,  Yi Shung Chaug

    IPC分类号： G11B5/39

    CPC分类号： G11B5/40 ,  G11B5/3133 ,  G11B5/39 ,  G11B5/3906 ,  G11B2005/0008

    摘要： A single-element magnetoresistive (MR) read head with reduced susceptibility to noise is disclosed. In particular, the present invention addresses the problem of noise generated thermally through contact with the recording medium. The present invention solves this problem by keeping the temperature of the read head at a level that minimizes the noise level. According to a preferred embodiment of the present invention, the shielding material used in the read head is recessed with respect to the magnetic-medium-bearing surface. In an alternative embodiment of the present invention, a thin coating of metal on the read head surface is applied. In yet another embodiment, the read element is operated with a low bias current so as to minimize the thermal effect of power consumption due to electrical resistance. In still another embodiment, the read element makes use of insulating material that is both an electrical insulator and a high quality thermal insulator.

    摘要翻译： 公开了具有降低的噪声敏感性的单元磁阻（MR）读头。 特别地，本发明解决了通过与记录介质接触而产生热噪声的问题。 本发明通过将读取头的温度保持在使噪声水平最小化的水平来解决这个问题。 根据本发明的优选实施例，读取头中使用的屏蔽材料相对于磁性介质承载表面凹陷。 在本发明的替代实施例中，应用在读取头表面上的薄金属涂层。 在另一个实施例中，读取元件以低偏置电流工作，以便最小化由电阻引起的功耗的热效应。 在另一个实施例中，读取元件利用既是电绝缘体又是高质量的绝热体的绝缘材料。