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8 条记录 (耗时 0.014 秒)

    Integrated field generator for actuating magnetic heads
    1.
    发明授权
    Integrated field generator for actuating magnetic heads 失效
    用于驱动磁头的集成磁场发生器

    公开(公告)号：US06714006B2

    公开(公告)日：2004-03-30

    申请号：US10226464

    申请日：2002-08-22

    申请人： Kenneth Donald Mackay ,  Antonio Perez, Jr.

    发明人： Kenneth Donald Mackay ,  Antonio Perez, Jr.

    IPC分类号： G01R3312

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/127 ,  G11B5/3967 ,  G11B5/455 ,  G11B2005/0016 ,  G11B2005/3996

    摘要： A structure is integrated into the design and manufacture of a magnetic head that allows self-generation of magnetic fields. The structure includes a conductor or conductors placed in close proximity to the read portion of a magnetic head and connected to an externally accessible connection. A high frequency signal is passed through the conductor to generate a magnetic field through the read device and simulate, for example, the head crossing magnetic domains on a magnetic memory disk.

    摘要翻译： 一种结构集成到磁头的设计和制造中，允许磁场自发生成。 该结构包括放置在磁头的读取部分附近并连接到外部可访问的连接的导体或导体。 高频信号通过导体，以通过读取装置产生磁场，并且模拟例如磁存储盘上磁头交叉的磁头。

    System for measuring magnetostriction employing a plurality of external magnetic field rotation harmonics
    3.
    发明授权
    System for measuring magnetostriction employing a plurality of external magnetic field rotation harmonics 失效
    使用多个外部磁场旋转谐波测量磁致伸缩的系统

    公开(公告)号：US06664783B1

    公开(公告)日：2003-12-16

    申请号：US10197313

    申请日：2002-07-15

    申请人： Lydia Baril ,  Kenneth Donald Mackay

    发明人： Lydia Baril ,  Kenneth Donald Mackay

    IPC分类号： G01R3312

    CPC分类号： G01R33/18

    摘要： A system for measuring the magnetostriction coefficient &lgr; of a sample material applied to a substrate element fixed at one end leaving the other end free to be deflected. An external rotating magnetic field of rotation frequency f and intensity Hext is applied to the cantilever substrate element the amplitude Am of the deflection of the free end is measured at each of a plurality of rotation frequency harmonics {fm} by, for example, using a plurality of lock-in amplifiers. The harmonic deflection amplitudes {Am} are combined to determine the magnetostriction coefficient &lgr; of the sample material. At an Hext equal to the sample saturation moment Msat and assuming a 15 Oe sample anisotropy Hk and coupling bias Hp, the error in the saturation magnetostriction coefficient &lgr;S measured according to this invention may be reduced by 80% to 90% over the error seen when using only the second harmonic deflection amplitudes A2.

    摘要翻译： 用于测量施加到固定在一端的衬底元件的样品材料的磁致伸缩系数λ的系统，使另一端自由偏转。 将旋转频率f和强度Hext的外部旋转旋转磁场施加到悬臂基板元件，通过例如使用多个旋转频率谐波{fm}中的每一个在多个旋转频率谐波{fm}中测量自由端的偏转的振幅Am 多个锁定放大器。 组合谐波偏转振幅{Am}以确定样品材料的磁致伸缩系数λ。 在等于样本饱和时刻Msat的Hext和假设15 Oe采样各向异性Hk和耦合偏置Hp的情况下，根据本发明测量的饱和磁致伸缩系数λS中的误差可以比所看到的误差减小80％至90％ 仅使用二次谐波偏转幅度A2。

    System, method, and apparatus for use of micro coils within a single slider test nest
    6.
    发明授权
    System, method, and apparatus for use of micro coils within a single slider test nest 有权
    在单个滑块测试巢内使用微型线圈的系统，方法和装置

    公开(公告)号：US07368905B2

    公开(公告)日：2008-05-06

    申请号：US10954855

    申请日：2004-09-30

    申请人： Serge Grinberg ,  Jimmy Luong ,  Kenneth Donald Mackay ,  Lisa Stukey, legal representative

    发明人： Frederick W. Stukey, Jr.

    IPC分类号： G01R33/12

    CPC分类号： G11B5/4555 ,  G11B5/455 ,  G11B2005/0013 ,  G11B2005/0029

    摘要： A precisely machined test nest holds a single hard disk drive slider. The test nest is fabricated to contain a micro pickup coil that is positioned to be able to detect magnetic flux from a write element of the slider. The micro pickup coil has highly repeatable and controllable positioning with respect to the write element. This technique also allows local magnetic field to be applied to the read element, and its small size allows excitation at higher frequencies than are currently achievable today. The coil is lithographically defined and integrated into the test nest and used on single slider testers. The low inductance of the coil allows it to be driven at high frequencies. Its position within the test nest ensures good heat sinking and enables large current pulses to be employed.

    摘要翻译： 一个精密加工的测试嵌套夹持单个硬盘驱动器滑块。 测试巢被制造成包含微型拾取线圈，微型拾音器线圈被定位成能够检测来自滑块的写入元件的磁通量。 微型拾取器线圈相对于写入元件具有高度可重复且可控的定位。 该技术还允许将局部磁场施加到读取元件，并且其小尺寸允许以比当前可实现的更高的频率进行激励。 线圈被光刻定义并集成到测试座中，并用于单个滑块测试仪。 线圈的低电感允许其以高频驱动。 它在测试座内的位置确保了良好的散热，并且可以使用大电流脉冲。