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    Stabilizing layered structure for magnetic tape heads
    2.
    发明授权
    Stabilizing layered structure for magnetic tape heads 有权

    公开(公告)号：US09947344B2

    公开(公告)日：2018-04-17

    申请号：US15097174

    申请日：2016-04-12

    Applicant: International Business Machines Corporation

    Inventor： Robert G. Biskeborn ,  Robert E. Fontana, Jr. ,  Calvin S. Lo

    IPC: G11B5/39 ,  G11B5/187 ,  G11B5/008

    CPC classification number: G11B5/1877 ,  G11B5/00813 ,  G11B5/00826 ,  G11B5/3912 ,  G11B5/3948 ,  G11B5/3977

    Abstract: An apparatus according to one embodiment includes an array of magnetic read transducers each having a current-perpendicular-to-plane sensor, magnetic shields on opposite sides of the sensor in an intended direction of media travel thereacross, and a stabilizing layered structure between at least one of the magnetic shields and the sensor. The stabilizing layered structure has an antiferromagnetic layer, a first ferromagnetic layer adjacent the antiferromagnetic layer, and a second ferromagnetic layer. The antiferromagnetic layer pins a magnetization direction in the first ferromagnetic layer along an antiferromagnetic polarized direction of the antiferromagnetic layer. An antiparallel coupling layer is positioned between the ferromagnetic layers such that a magnetization direction in the second ferromagnetic layer is opposite the magnetization direction in the first ferromagnetic layer.

    Multi-sensor reader structure having a current path with increased size to reduce noise
    5.
    发明授权
    Multi-sensor reader structure having a current path with increased size to reduce noise 有权
    多传感器读取器结构具有增大尺寸的电流路径以减少噪声

    公开(公告)号：US09542962B2

    公开(公告)日：2017-01-10

    申请号：US14604617

    申请日：2015-01-23

    Applicant: HGST Netherlands B.V.

    Inventor： Hideki Mashima ,  Kenichi Meguro ,  Nobuo Yoshida ,  Toyoshige Noridomi ,  Tomohiro Saito ,  Kaori Suzuki

    IPC: G11B5/39

    CPC classification number: G11B5/3912 ,  G11B5/3932 ,  G11B5/3948 ,  G11B5/3958 ,  G11B5/397

    Abstract: In one embodiment, a magnetic head includes a lower magnetic shield layer positioned at a media-facing surface, a pinned layer positioned above the lower magnetic shield layer at the media-facing surface, at least two MR elements extending in an element height direction by a first length positioned above the pinned layer and separated in a cross-track direction by an inner layer, bias layers extending in the element height direction by a second length positioned on outside edges of the MR elements and the pinned layer, and current paths positioned above and in electrical communication with the bias layers on either side of the inner layer, each current path extending in the element height direction away from the media-facing surface by a third length.

    Abstract translation: 在一个实施例中，磁头包括位于面向介质表面的下磁屏蔽层，位于面向媒体的表面上的下磁屏蔽层上方的被钉扎层，至少两个沿单元高度方向延伸的MR元件， 所述第一长度位于所述被钉扎层上方并且在交叉轨道方向上由内层分离，所述偏置层在所述元件高度方向上延伸位于所述MR元件和被钉扎层的外边缘上的第二长度，并且所述电流路径被定位 并且与内层的任一侧上的偏置层电连通，每个电流路径在元件高度方向上延伸离开面向介质的表面第三长度。

    System and method for magnetic transducers having multiple sensors and AFC shields
    7.
    发明授权
    System and method for magnetic transducers having multiple sensors and AFC shields 有权
    具有多个传感器和AFC屏蔽的磁性换能器的系统和方法

    公开(公告)号：US09431031B1

    公开(公告)日：2016-08-30

    申请号：US14667433

    申请日：2015-03-24

    Applicant: Western Digital (Fremont), LLC

    Inventor： Rongfu Xiao ,  Shihai He ,  Daniele Mauri ,  Ming Mao ,  Shaoping Li

    IPC: G11B5/39 ,  G11B5/11 ,  G11B5/60

    CPC classification number: G11B5/3912 ,  C21D6/001 ,  C21D6/007 ,  C21D9/0068 ,  G11B5/11 ,  G11B5/112 ,  G11B5/3163 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3948 ,  G11B5/397 ,  G11B5/4886 ,  G11B2005/3996

    Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method includes providing a first shield, a first read sensor, an antiferromagnetically coupled (AFC) shield that includes an antiferromagnet, a second read sensor and a second shield. The read sensors are between the first and second shields. The AFC shield is between the read sensors. An optional anneal for the first shield is in a magnetic field at a first angle from the ABS. Anneals for the first and second read sensors are in magnetic fields in desired first and second read sensor bias directions. The AFC shield anneal is in a magnetic field at a third angle from the ABS. The second shield anneal is in a magnetic field at a fifth angle from the ABS. The fifth angle is selected based on a thickness and a desired AFC shield bias direction for the antiferromagnet.

    Abstract translation: 一种方法和系统提供具有空气轴承表面（ABS）的磁换能器。 该方法包括提供第一屏蔽，第一读取传感器，包括反铁磁体的反铁磁耦合（AFC）屏蔽，第二读取传感器和第二屏蔽。 读取的传感器位于第一和第二屏蔽之间。 AFC屏蔽位于读取传感器之间。 第一屏蔽件的可选退火处于与ABS成一定角度的磁场中。 用于第一和第二读取传感器的退火处于期望的第一和第二读取传感器偏置方向的磁场中。 AFC屏蔽退火处于与ABS成三角的磁场。 第二屏蔽退火处于与ABS成五度角的磁场中。 基于反铁磁体的厚度和期望的AFC屏蔽偏置方向选择第五角度。

    Read head with multiple reader stacks
    8.
    发明授权
    Read head with multiple reader stacks 有权
    用多个阅读器堆栈读头

    公开(公告)号：US09406321B2

    公开(公告)日：2016-08-02

    申请号：US14192467

    申请日：2014-02-27

    Applicant: Seagate Technology LLC

    Inventor： Mark Thomas Kief ,  Thomas Roy Boonstra ,  Victor Boris Sapozhnikov ,  Harry Sam Edelman

    IPC: G11B5/39

    CPC classification number: G11B5/3912 ,  G11B5/3909 ,  G11B5/3948 ,  G11B5/3964 ,  G11B5/397 ,  G11B5/398 ,  G11B2005/3996

    Abstract: A read head includes a bottom shield configured as a bottom electrical contact. A bottom reader stack is disposed on and electrically coupled to the bottom shield. A middle electrical contact is electrically coupled to a top layer of the bottom reader stack. A top reader stack is disposed on the bottom reader stack. A bottom layer of the top reader stack electrically coupled to the middle electrical contact. A top shield is configured as a top electrical contact. The top shield is disposed on and electrically coupled to the top reader stack.

    Abstract translation: 读头包括配置为底部电触点的底部屏蔽。 底部读取器堆叠设置在底部屏蔽上并电耦合到底部屏蔽。 中间电触头电耦合到底部读取器叠层的顶层。 顶部读取器堆叠被布置在底部读取器堆叠上。 顶部读取器堆叠的底层电耦合到中间电触点。 顶部屏蔽被配置为顶部电气触点。 顶部屏蔽层设置在顶部读取器堆叠上并电耦合到顶部读取器堆叠。

    Multi-sensor reader with different readback sensitivities
    9.
    发明授权
    Multi-sensor reader with different readback sensitivities 有权
    具有不同回读灵敏度的多传感器读卡器

    公开(公告)号：US09396745B2

    公开(公告)日：2016-07-19

    申请号：US14201358

    申请日：2014-03-07

    Applicant: Seagate Technology LLC

    Inventor： Declan Macken ,  Jason Gadbois ,  Eric W. Singleton ,  John M. Wolf

    IPC: G11B5/39

    CPC classification number: G11B5/3951 ,  G11B5/3909 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/3948 ,  G11B5/3958 ,  G11B2005/3996

    Abstract: Apparatus for sensing data from a magnetic recording medium using a multi-sensor reader with different readback sensitivities. In accordance with some embodiments, a data transducing head has first and second read sensors. The first read sensor is optimized for reading data and the second read sensor is optimized to detect thermal asperity (TA) events.

    Abstract translation: 用于使用具有不同回读敏感度的多传感器读取器来感测来自磁记录介质的数据的装置。 根据一些实施例，数据传感头具有第一和第二读取传感器。 第一个读取传感器被优化用于读取数据，第二个读取传感器被优化以检测热不均匀性（TA）事件。

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