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    Recessed AFM stitch interface engineering
    1.
    发明授权
    Recessed AFM stitch interface engineering 有权

    公开(公告)号：US09870790B1

    公开(公告)日：2018-01-16

    申请号：US15157579

    申请日：2016-05-18

    Applicant: Seagate Technology LLC

    Inventor： Sameh Hassan ,  Yuqing Du ,  Marcus Ormston ,  Denis O'Donnell ,  Kevin McNeill

    IPC: G11B5/39 ,  G11B5/31

    CPC classification number: G11B5/3912 ,  G11B5/3163 ,  G11B5/3929

    Abstract: A read sensor and fabrication method thereof. The method includes forming a bottom stack that includes an antiferromagnetic (AFM) layer, a lower ferromagnetic stitch layer above the AFM layer and a sacrificial cap layer on the lower ferromagnetic stitch layer. The sacrificial cap layer is formed of a material that alloys magnetically with the lower ferromagnetic stitch layer. The method further includes substantially removing the sacrificial cap layer. After substantially removing the sacrificial layer, an upper ferromagnetic stitch layer is deposited on the lower ferromagnetic stitch layer of the bottom stack to form a stitch interface that provides relatively strong magnetic coupling between the lower ferromagnetic stitch layer of the bottom stack and the upper ferromagnetic stitch layer.

    Data Reader with Front Shield Coupling Structure
    2.
    发明申请
    Data Reader with Front Shield Coupling Structure 有权
    具有前屏蔽耦合结构的数据读取器

    公开(公告)号：US20170033278A1

    公开(公告)日：2017-02-02

    申请号：US14810164

    申请日：2015-07-27

    Applicant: Seagate Technology LLC

    Inventor： Adam A. Lapicki ,  Sameh Hassan ,  YuQing Du ,  Mark T. Kief ,  Marcus W. Ormston

    IPC: H01L43/08

    CPC classification number: G11B5/3912 ,  G01R33/0011 ,  G01R33/0017 ,  G01R33/0076 ,  G01R33/093 ,  G11B5/3932 ,  G11B5/398 ,  H01L43/08

    Abstract: A data reader may consist of at least a magnetoresistive stack positioned on an air bearing surface. A portion of the magnetoresistive stack may be set to a first fixed magnetization by a pinning structure separated from the air bearing surface by a front shield that is set to a second fixed magnetization by a biasing structure. The front shield may be separated from the biasing structure by a coupling structure.

    Abstract translation: 数据读取器可以由位于空气轴承表面上的至少一个磁阻堆叠构成。 磁阻堆叠的一部分可以通过由空气轴承表面分离的钉扎结构设置为第一固定磁化，前挡板通过偏置结构设定为第二固定磁化。 前屏蔽件可以通过耦合结构与偏置结构分离。

    Magnetoresistive sensor with recessed antiferromagnetic layer and stabilization feature
    8.
    发明授权
    Magnetoresistive sensor with recessed antiferromagnetic layer and stabilization feature 有权

    公开(公告)号：US10008223B1

    公开(公告)日：2018-06-26

    申请号：US15435561

    申请日：2017-02-17

    Applicant: Seagate Technology LLC

    Inventor： Alexey Dobrynin ,  Zhiran Wang ,  Kevin McNeill ,  Denis O'Donnell ,  Sameh Hassan ,  Marcus Ormston ,  Robert William Lamberton

    IPC: G11B5/39

    CPC classification number: G11B5/3906 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/398 ,  G11B2005/3996

    Abstract: A read sensor having a bearing surface and an antiferromagnetic (AFM) layer recessed from the bearing surface. The read sensor includes a synthetic antiferromagnetic (SAF) structure over the AFM layer. The SAF structure includes a recessed lower pinned layer, an upper pinned layer, a reference layer and a stabilization feature. The stabilization feature may include deliberate reduction of the antiferromagnetic coupling energy density between the upper pinned layer and the reference layer, so that it becomes lower than the first energy density of antiferromagnetic coupling between the upper pinned layer and the lower pinned layer. The stabilization feature may alternatively include an intermediate pinned layer between the lower pinned layer and the upper pinned layer. The intermediate pinned layer is antiferromagnetically coupled to both the lower pinned layer and the upper pinned layer, and at least a portion of the intermediate pinned layer is recessed behind the bearing surface.

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