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188 条记录 (耗时 0.055 秒)

    Exchange biased pole for reducing the likelihood of domain lockup in perpendicular recording
    1.
    发明授权
    Exchange biased pole for reducing the likelihood of domain lockup in perpendicular recording 有权
    交换偏置极点，以减少垂直记录中域锁定的可能性

    公开(公告)号：US07692895B1

    公开(公告)日：2010-04-06

    申请号：US11401208

    申请日：2006-04-10

    申请人： Yan Wu ,  Gang Herbert Lin

    发明人： Yan Wu ,  Gang Herbert Lin

    IPC分类号： G11B5/147

    CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B5/3116

    摘要： A magnetic head for perpendicular recording includes a main pole having a first end and a second end. Coils are positioned with respect to the main pole. A return pole forms first and second return paths for magnetic flux extending from the second end of the main pole. The main pole includes an anti-ferromagnetic layer to pin a remnant magnetic moment in the horizontal direction.

    摘要翻译： 用于垂直记录的磁头包括具有第一端和第二端的主极。 线圈相对于主极定位。 返回杆形成从主极的第二端延伸的磁通的第一和第二返回路径。 主极包括反铁磁层，以在水平方向上引导残余磁矩。

    Writer shields with modified shapes for reduced flux shunting
    7.
    发明授权
    Writer shields with modified shapes for reduced flux shunting 有权
    作者盾牌具有改进的形状，用于减少通量分流

    公开(公告)号：US08542461B2

    公开(公告)日：2013-09-24

    申请号：US12806803

    申请日：2010-08-20

    申请人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

    发明人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

    IPC分类号： G11B5/147 ,  G11B5/187

    CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3146

    摘要： A perpendicular magnetic recording (PMR) head is fabricated with a configuration of leading edge shields and trailing edge shields that reduce the leakage of flux between the main pole and the shields. The reduction of leakage is achieved by eliminating the sharp 90° corner between the backside surfaces of the shields and the surfaces adjacent to the main pole. In one embodiment the corner is replaced by two successive acute angles, in another embodiment it is replaced by a rounded surface. In a final embodiment, leakage between the pole and trailing edge shield is achieved by shortening the length of the write gap by forming the shield with a double taper.

    摘要翻译： 垂直磁记录（PMR）头被制造成具有前缘屏蔽和后缘屏蔽的结构，其减小主极和屏蔽之间的通量泄漏。 通过消除屏蔽的背面和与主极相邻的表面之间的尖锐的90°角来实现泄漏的减少。 在一个实施例中，角部被两个连续的锐角取代，在另一个实施例中，它被圆形表面所代替。 在最终实施例中，通过用双锥形形成屏蔽来缩短写入间隙的长度来实现极和后缘屏蔽之间的泄漏。

    Back channel communication
    9.
    发明授权
    Back channel communication 有权
    后通道通信

    公开(公告)号：US08418004B2

    公开(公告)日：2013-04-09

    申请号：US13046991

    申请日：2011-03-14

    申请人： Massimo Sorbara ,  Patrick Duvaut ,  Yan Wu

    发明人： Massimo Sorbara ,  Patrick Duvaut ,  Yan Wu

    IPC分类号： G06F11/00 ,  G01R31/28 ,  H04B1/38 ,  H04B3/46

    CPC分类号： H04L12/66 ,  H04B3/32

    摘要： Various embodiments are described for back channel communication. One embodiment is a method that comprises receiving data at customer premises equipment (CPE), determining at least one error in the received data, formatting the determined error for communication to a central office (CO), and sending the formatted error to the CO via a back channel, wherein the formatted error is sent between sync frames of a discrete multitone (DMT) superframe.

    摘要翻译： 对于后向信道通信描述了各种实施例。 一个实施例是一种方法，其包括在客户驻地设备（CPE）处接收数据，确定接收到的数据中的至少一个错误，将确定的错误格式化为中心局（CO），并将格式化的错误发送到CO经由 背信道，其中格式化的错误在离散多音（DMT）超帧的同步帧之间发送。