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    Perpendicular magnetic write head having a laminated trailing return pole
    2.
    发明授权
    Perpendicular magnetic write head having a laminated trailing return pole 有权
    垂直写磁头具有层叠的后退磁极

    公开(公告)号：US08929028B2

    公开(公告)日：2015-01-06

    申请号：US12975121

    申请日：2010-12-21

    申请人： Wen-Chien D. Hsiao ,  Yimin Hsu ,  Jennifer Leung

    发明人： Wen-Chien D. Hsiao ,  Yimin Hsu ,  Jennifer Leung

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

    CPC分类号： G11B5/1278 ,  G11B5/315 ,  Y10T428/1186

    摘要： A perpendicular magnetic write head having a laminated trailing return pole structure that reduces magnetic eddy currents in the return pole for improved write head efficiency. The trailing magnetic return pole includes multiple magnetic layers. Each magnetic layer is separated from an adjacent magnetic layer of the return pole by a non-magnetic layer. The non-magnetic layer terminates at a region that is removed from the air bearing surface in order to allow contact between the magnetic layers at the ABS, thereby preventing stray magnetic fields from emitting from the magnetic layers of the write pole.

    摘要翻译： 具有层叠后退磁极结构的垂直磁性写头，其减小返回极中的磁涡流，以提高写头效率。 尾磁回极包括多个磁性层。 每个磁性层通过非磁性层与返回极的相邻磁性层分离。 非磁性层终止于从空气轴承表面移除的区域，以便允许ABS处的磁性层之间的接触，从而防止杂散磁场从写入磁极的磁性层发射。

    Thin-film magnetic head with improved wide area track erasure (WATE), method of manufacturing the same, head gimbal assembly, and hard disk drive
    3.
    发明授权
    Thin-film magnetic head with improved wide area track erasure (WATE), method of manufacturing the same, head gimbal assembly, and hard disk drive 有权
    具有改善的广域轨道擦除（WATE）的薄膜磁头，其制造方法，头万向架组件和硬盘驱动器

    公开(公告)号：US08824102B2

    公开(公告)日：2014-09-02

    申请号：US13099729

    申请日：2011-05-03

    申请人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Shigeki Tanemura ,  Kazuki Sato ,  Atsushi Iijima

    发明人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Shigeki Tanemura ,  Kazuki Sato ,  Atsushi Iijima

    IPC分类号： G11B5/31 ,  G11B5/127

    CPC分类号： G11B5/1278 ,  G11B5/3116 ,  Y10T29/49032 ,  Y10T428/1186

    摘要： A thin-film magnetic head includes a main magnetic pole layer, write shield layer, gap layer, and thin-film coils, which are laminated on a substrate. A return magnetic pole layer is spaced from the medium-opposing surface on the side opposite to the write shield layer with the main magnetic pole layer intervening therebetween. A connecting magnetic layer is formed using a magnetic material to connect the return magnetic pole layer to the write shield layer on the side closer to the medium-opposing surface than is the thin-film coil. The thin-film coil is wound as a flat spiral around the write shield layer. A part of the thin-film coil wound as the flat spiral is disposed only at a position distanced from the substrate than is the main magnetic pole layer.

    摘要翻译： 薄膜磁头包括层叠在基板上的主磁极层，写入屏蔽层，间隙层和薄膜线圈。 返回磁极层与写入屏蔽层相对的一侧的介质相对表面间隔开，主磁极层介于它们之间。 使用磁性材料形成连接磁性层，以使返回磁极层与薄膜线圈相比更靠近介质相对表面的一侧将写入屏蔽层连接。 薄膜线圈围绕写入屏蔽层缠绕成平坦的螺旋线。 作为扁平螺旋卷绕的薄膜线圈的一部分仅设置在与主磁极层相比离开基板的位置。

    Damping control in magnetic recording systems
    10.
    发明申请
    Damping control in magnetic recording systems 有权
    磁记录系统中的阻尼控制

    公开(公告)号：US20070003792A1

    公开(公告)日：2007-01-04

    申请号：US11170035

    申请日：2005-06-29

    申请人： Mark Covington ,  Ganping Ju ,  Werner Scholz ,  Michael Minor

    发明人： Mark Covington ,  Ganping Ju ,  Werner Scholz ,  Michael Minor

    IPC分类号： G11B5/33 ,  G11B5/66

    CPC分类号： G11B5/667 ,  G11B5/1278 ,  G11B5/581 ,  G11B5/6005 ,  Y10T428/115 ,  Y10T428/1186

    摘要： A magnetic recording system is disclosed in which the magnetization dynamics of the write head and recording medium are highly damped. The system may comprise a perpendicular recording head having a write pole, and a recording medium including a hard magnetic recording layer and a soft magnetic underlayer (SUL). The increased magnetic damping in the write pole and SUL suppresses precessional motion of the respective magnetizations, leading to a reduction in transition jitter caused by spurious head field fluctuations. The damping may be increased by providing films or multilayer structures that are doped with rare earth or transition metal elements. Exchange coupled laminates of doped and undoped layers may optimize both the effective damping and write field in the recording system.

    摘要翻译： 公开了一种磁记录系统，其中写头和记录介质的磁化动力学被高度阻尼。 该系统可以包括具有写入极的垂直记录头和包括硬磁记录层和软磁性底层（SUL）的记录介质。 写入磁极和SUL中的增加的磁阻抑制了相应磁化的进动运动，导致由杂散磁头场波动引起的转换抖动的减小。 可以通过提供掺杂有稀土或过渡金属元素的膜或多层结构来增加阻尼。 掺杂和未掺杂层的交换耦合层压板可以优化记录系统中的有效阻尼和写入场。