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98 条记录 (耗时 0.017 秒)

    Stitched shielded pole structure for a perpendicular magnetic recording write head
    11.
    发明申请
    Stitched shielded pole structure for a perpendicular magnetic recording write head 失效
    用于垂直磁记录写头的拼接屏蔽极结构

    公开(公告)号：US20050219746A1

    公开(公告)日：2005-10-06

    申请号：US10814077

    申请日：2004-03-31

    申请人： Kenichi Takano ,  Cherng-Chyi Han

    发明人： Kenichi Takano ,  Cherng-Chyi Han

    IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/31

    CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3113 ,  G11B5/3143

    摘要： A PMR write head has a stitched shield formation which results in a strong perpendicular write field with sharp vertical gradients. The shape of the stitched shield is determined by two design parameters, d=½(WSWSLE-WMPTE), and TSWS, where WSWSLE is the width of the leading edge of the stitched shield in the ABS plane, WMPTE is the width of the trailing edge of the main magnetic pole in the ABS plane and TSWS is the thickness of the stitched shield. By a proper choice of these parameters, the write field of the head is sharply limited in the cross-track direction, so that adjacent track erasures are eliminated.

    摘要翻译： PMR写头具有缝合的屏蔽结构，其形成具有尖锐垂直梯度的强垂直写入场。 缝合屏蔽的形状由两个设计参数d =½（W> SWSLE-> W> MP MP TE TE TE TE SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB and and and and and and and and） W SHSLE 是ABS平面中缝合屏蔽的前缘的宽度，W> MPTE 是ABS平面中主磁极的后缘的宽度 而T SWS 是缝合屏蔽的厚度。 通过这些参数的适当选择，头部的写入场在交叉轨道方向上被大大限制，从而消除了相邻的轨迹擦除。

    Bottom pole structure with back-side steps
    12.
    发明申请
    Bottom pole structure with back-side steps 失效
    底部柱结构带背面步骤

    公开(公告)号：US20050190493A1

    公开(公告)日：2005-09-01

    申请号：US10789097

    申请日：2004-02-27

    申请人： Kenichi Takano ,  Moris Dovek

    发明人： Kenichi Takano ,  Moris Dovek

    IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/147

    CPC分类号： G11B5/1274

    摘要： To generate a high data transfer rate from a magnetic write head, a faster flux rise time is needed. This often brings about severe excess saturation of the head and, as a result, adjacent track erasures often occur. This problem has been overcome by dividing the bottom pole into front and rear sections with a step between them. The write gap is part of the front section while the rear section (to which the front section is attached) is closer to the top pole so excess flux generated by higher write currents can be absorbed in a direction normal to the ABS instead of being diverted to the bottom pole shoulder.

    摘要翻译： 为了从磁写头产生高数据传输速率，需要更快的通量上升时间。 这通常会导致头部的严重过度饱和，因此经常发生相邻的轨迹擦除。 通过将底极分成前后两部分之间的台阶，已经克服了这个问题。 写入间隙是前部的一部分，而后部（前部附接到其上）更接近顶极，因此由较高写入电流产生的过量磁通可以沿着垂直于ABS的方向吸收，而不是被转向 到底极肩。

    Perpendicular magnetic recording head laminated with AFM-FM phase change material
    16.
    发明授权
    Perpendicular magnetic recording head laminated with AFM-FM phase change material 有权
    垂直磁记录头与AFM-FM相变材料层压

    公开(公告)号：US08446692B2

    公开(公告)日：2013-05-21

    申请号：US13199188

    申请日：2011-08-22

    申请人： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

    发明人： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

    IPC分类号： G11B5/127 ,  G11B5/147

    CPC分类号： G11B5/3113 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/3146 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044

    摘要： A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material that is in an anti-ferromagnetic (AFM) state during non-writing and switches to a ferromagnetic (FM) state by heating during writing. The main pole layer including the write pole may be comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged in an alternating manner. The AFM-FM phase change material is preferably a FeRh, FeRhPt, FeRhPd, or FeRhIr and may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times.

    摘要翻译： 公开了一种PMR写入器，其在非写入期间最小化磁极擦除并且在写入期间通过在非写入期间处于反铁磁（AFM）状态的AFM-FM相变材料中的写入磁场最大化并切换到铁磁（FM） 在写作期间加热状态。 包括写极的主极层可以由具有多个“n”个铁磁层和“n-1”个AFM-FM相变材料层的交替排列的层压结构构成。 AFM-FM相变材料优选为FeRh，FeRhPt，FeRhPd或FeRhIr，并且还可以用作磁通门以防止磁轭焊剂泄漏到写极尖端。 AFM到FM转换的加热由位于AFM-FM相变材料附近的写入线圈和/或线圈提供，以实现更快的转换时间。

    Heat assisted narrow pole design with trailing shield
    18.
    发明申请
    Heat assisted narrow pole design with trailing shield 有权
    热辅助窄杆设计与后盾

    公开(公告)号：US20120263024A1

    公开(公告)日：2012-10-18

    申请号：US13066420

    申请日：2011-04-14

    申请人： Xuhui Jin ,  Yuchen Zhou ,  Kenichi Takano ,  Joe Smyth

    发明人： Xuhui Jin ,  Yuchen Zhou ,  Kenichi Takano ,  Joe Smyth

    IPC分类号： G11B13/04 ,  G11B5/127 ,  G11B7/22 ,  B82Y40/00 ,  B82Y10/00

    CPC分类号： G11B5/84 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/314 ,  G11B2005/0021

    摘要： A TAMR (Thermal Assisted Magnetic Recording) writer has a narrow pole tip with a trailing edge magnetic shield. The narrow pole tipped write head uses the energy of laser generated edge plasmons, formed in a plasmon generating layer, to locally heat a PMR magnetic recording medium below its Curie temperature, Tc. When combined with the effects of the narrow tip, this local heating to a temperature below Tc is sufficient to create good transitions and narrow track widths in the magnetic medium. The write head is capable of writing effectively on state-of-the-art PMR recording media having Hk of 20 kOe or more.

    摘要翻译： TAMR（热辅助磁记录）写入器具有带有后缘磁屏蔽的窄极端。 窄极尖写头使用在等离子体发生层中形成的激光产生的边缘等离子体激元的能量来局部加热低于其居里温度Tc的PMR磁记录介质。 当与窄尖端的作用相结合时，这种局部加热到低于Tc的温度足以在磁性介质中产生良好的转变和窄的轨道宽度。 写头能够有效地写入具有20kOe以上Hk的最先进的PMR记录介质。