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    Perpendicular Magnetic Recording (PMR) Write Head with Improved Shapes of Side Shield and Main Pole
    22.
    发明申请
    Perpendicular Magnetic Recording (PMR) Write Head with Improved Shapes of Side Shield and Main Pole 审中-公开
    垂直磁记录（PMR）写头，具有改进的侧屏和主极的形状

    公开(公告)号：US20170040031A1

    公开(公告)日：2017-02-09

    申请号：US15222412

    申请日：2016-07-28

    Applicant: Headway Technologies, Inc.

    Inventor： Yuhui Tang ,  Yaguang Wei ,  Jiun-Ting Lee ,  Ping-Wei Zhuang

    IPC: G11B5/60 ,  G11B5/31 ,  G11B5/127

    CPC classification number: G11B5/6082 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315

    Abstract: A perpendicular magnetic recording writer is disclosed with a side shield separated from a write pole side by a gap layer at an air bearing surface (ABS) where the side shield has a first sidewall facing the write pole with an end at height (h1) from the ABS, and a second sidewall at height h1 that is parallel to the ABS. The write pole side is curved such that a first portion proximate to the ABS is at an angle of 0 to 40 degrees with respect to a center plane formed orthogonal to the ABS, and a second section proximate to a corner where the curved side connects with a flared main pole side is formed substantially parallel to the second sidewall. When h1 is 30-80 nm, and the corner is 80-150 nm from the ABS, overwrite is improved while cross-track field gradient is enhanced.

    Abstract translation: 公开了一种垂直磁记录装置，其具有侧面屏蔽，该侧屏蔽在空气轴承表面（ABS）处由间隙层与写入极侧分离，其中侧屏具有面向写极的第一侧壁，高度（h1） ABS，以及平行于ABS的高度为h1的第二侧壁。 写极侧是弯曲的，使得接近ABS的第一部分相对于与ABS正交形成的中心平面成0度到40度的角度，以及靠近拐角处的第二部分，其中弯曲侧与 形成大致平行于第二侧壁的扩口主极侧。 当h1为30-80nm，角为80-150nm时，覆盖提高，而跨轨道场梯度增强。

    PP3 shape designs for shield domain control to improve either skip track erasure (STE) or write performance for perpendicular magnetic recording (PMR)
    23.
    发明授权
    PP3 shape designs for shield domain control to improve either skip track erasure (STE) or write performance for perpendicular magnetic recording (PMR) 有权
    PP3形状设计用于屏蔽域控制，以提高垂直磁记录（PMR）的跳过轨迹擦除（STE）或写入性能

    公开(公告)号：US09361923B1

    公开(公告)日：2016-06-07

    申请号：US14690609

    申请日：2015-04-20

    Applicant: Headway Technologies, Inc.

    Inventor： Yue Liu ,  Moris Dovek ,  Glen Garfunkel ,  Yaguang Wei ,  Yuhui Tang ,  Po-Kang Wang

    IPC: G11B5/127 ,  G11B5/60 ,  G11B5/31 ,  G11B5/11

    CPC classification number: G11B5/3116 ,  G11B5/11 ,  G11B5/3163

    Abstract: A shield structure for a PMR writer is disclosed and features a first trailing shield on a write gap, and a second (PP3) trailing shield on the first trailing shield and magnetically connected to the main pole layer. From a top-down view along the down-track direction, the PP3 trailing shield has various shapes to provide shape anisotropy such that following hard magnet or reverse magnet initialization, PP3 trailing shield magnetic orientation has a stable three domain configuration thereby minimizing skip track erasure (STE) or improving area density capability (ADC). At least one sloped side is introduced that forms an angle >90 degrees with the PP3 trailing shield backside. In other embodiments, a thinner leading shield may be used to improve STE. The PP3 trailing shield may have a dome shape or a planar shape from a down-track cross-sectional view.

    Abstract translation: 公开了一种用于PMR写入器的屏蔽结构，其特征在于写间隙上的第一尾部屏蔽和在第一后屏蔽上的第二（PP3）后屏蔽，并且磁连接到主极层。 PP3后挡板沿着向下的方向从上向下看具有各种形状，以提供形状各向异性，使得随后的硬磁体或反磁体初始化，PP3后屏蔽磁方向具有稳定的三域结构，从而最小化跳过轨迹擦除 （STE）或改善面积密度能力（ADC）。 引入至少一个倾斜的侧面，与PP3后挡板背面形成> 90度的角度。 在其他实施例中，可以使用更薄的前导屏蔽来改善STE。 PP3后挡板可以具有从下轨道横截面视图的圆顶形状或平面形状。

    Method of forming a writer with an AFM write gap
    25.
    发明授权
    Method of forming a writer with an AFM write gap 有权
    用AFM写入间隙形成写入器的方法

    公开(公告)号：US09336799B2

    公开(公告)日：2016-05-10

    申请号：US14048080

    申请日：2013-10-08

    Applicant: Headway Technologies, Inc.

    Inventor： Tai Min ,  Yuhui Tang ,  Lijie Guan ,  Min Li

    IPC: G11B5/23 ,  G11B5/127 ,  G11B5/235 ,  G11B5/31 ,  H01F10/32

    CPC classification number: G11B5/232 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/3116 ,  H01F10/3272 ,  Y10T428/1186

    Abstract: A perpendicular magnetic recording (PMR) head is fabricated with main pole and a trailing edge shield antiferromagnetically coupled across a write gap by either having the write gap layer formed as a synthetic antiferromagnetic tri-layer (SAF) or formed as a monolithic layer of antiferromagnetic material. The coupling improves the write performance of the writer by enhancing the perpendicular component of the write field and its gradient. Methods of fabricating the writer are provided.

    Abstract translation: 制造垂直磁记录（PMR）头，其主磁极和后沿屏蔽通过将写间隙层形成为合成反铁磁三层（SAF）或形成为反铁磁性的单片层，反写磁耦合跨写写间隙 材料。 耦合通过增强写入场的垂直分量及其梯度来提高写入器的写入性能。 提供了作者的制作方法。

    PMR writer with patterned shields for adjacent track erasure improvement
    26.
    发明授权
    PMR writer with patterned shields for adjacent track erasure improvement 有权
    具有图案化屏蔽的PMR写入器用于相邻轨道擦除改进

    公开(公告)号：US09082433B1

    公开(公告)日：2015-07-14

    申请号：US14297839

    申请日：2014-06-06

    Applicant: Headway Technologies, Inc.

    Inventor： Yuhui Tang ,  Suping Song ,  Lijie Guan ,  Moris Dovek ,  Yaguang Wei ,  Yue Liu

    IPC: G11B5/127 ,  G11B5/31

    CPC classification number: G11B5/315 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3146

    Abstract: A PMR writer is disclosed wherein one or more of the leading shield, side shields, and trailing shield are comprised of first portion that is elongated in a cross-track direction at the ABS, and a second portion consisting of a plurality of pads each having a side adjoining the first portion along a side opposite the ABS. Pads may have a polygonal shape or a shape with curvature and are separated by portions of a dielectric layer. When a length of the pads in a down-track direction is substantially greater than a width in a cross-track direction and height in a vertical direction, then shape anisotropy in the shield is biased in a down-track direction and is perpendicular to the driving flux direction from the main pole tip thereby minimizing 180 degree rotations in magnetization and associated adjacent track erasure.

    Abstract translation: 公开了一种PMR写入器，其中前屏蔽，侧屏蔽和后屏蔽中的一个或多个由在ABS处的交叉轨道方向上细长的第一部分和由多个焊盘组成的第二部分组成，每个焊盘具有 沿着与ABS相对的一侧邻接第一部分的一侧。 垫片可以具有多边形形状或具有曲率的形状并且被介电层的一部分分隔开。 当沿着轨道方向的焊盘的长度大大地大于横向方向上的宽度和垂直方向的高度时，屏蔽件中的形状各向异性在下行方向被偏置并且垂直于 从主极端子驱动磁通方向，从而使磁化和相关的相邻轨道擦除中的180度旋转最小化。

    Magnetic Recording Writer With Improved Main Pole Shape
    28.
    发明申请
    Magnetic Recording Writer With Improved Main Pole Shape 有权

    公开(公告)号：US20230083836A1

    公开(公告)日：2023-03-16

    申请号：US17472304

    申请日：2021-09-10

    Applicant: Headway Technologies, Inc.

    Inventor： Ying Liu ,  Yuhui Tang ,  Jiun-Ting Lee ,  Yue Liu

    IPC: G11B5/31

    Abstract: A magnetic recording writer is disclosed. In some embodiments, the writer includes a main pole having a front portion and a back portion, a gap layer surround the main pole at the ABS, and a shield structure. The front portion includes a pole tip at an ABS plane, a pole tip thickness in a down-track direction, and curved sidewalls on each side of a center plane that is orthogonal to the ABS and bisects the main pole. The back portion includes first flared sidewalls extending from the curved sidewalls at an angle between 0 and 25 degrees relative to planes parallel to the center plane. The shield structure includes sidewalls having a sidewall portion facing the main pole and formed substantially conformal to the curved sidewalls up to a height of about 30-200 nm where the sidewall portions no longer follow the shape of the main pole.

    Writer with laterally graded spin layer MsT
    29.
    发明授权
    Writer with laterally graded spin layer MsT 有权

    公开(公告)号：US11545175B2

    公开(公告)日：2023-01-03

    申请号：US17691869

    申请日：2022-03-10

    Applicant: Headway Technologies, Inc.

    Inventor： Ying Liu ,  Shohei Kawasaki ,  Wenyu Chen ,  Yuhui Tang

    IPC: G11B5/31 ,  G11B5/235 ,  G11B5/23 ,  G11B5/127 ,  G11B5/39 ,  G11B5/00

    Abstract: A method of forming a spin transfer torque reversal assisted magnetic recording (STRAMR) writer is disclosed wherein a spin torque oscillator (STO) has a flux guiding layer (FGL) wherein magnetization flips to a direction substantially opposing the write gap (WG) field when sufficient current (IB) density is applied across the STO between a trailing shield and main pole (MP) thereby enhancing the MP write field. The FGL has a center portion with a larger magnetization saturation×thickness (MsT) than in FGL outer portions proximate to STO sidewalls. Accordingly, lower IB density is necessary to provide a given amount of FGL magnetization flipping and there is reduced write bubble fringing compared with writers having a FGL with uniform MsT. Lower MsT is achieved by partially oxidizing FGL outer portions. In some embodiments, there is a gradient in outer FGL portions where MsT increases with increasing distance from FGL sidewalls.

    WRITER WITH ADAPTIVE SIDE GAP
    30.
    发明申请
    WRITER WITH ADAPTIVE SIDE GAP 有权

    公开(公告)号：US20220165300A1

    公开(公告)日：2022-05-26

    申请号：US16953925

    申请日：2020-11-20

    Applicant: Headway Technologies, Inc.

    Inventor： Ying Liu ,  Yuhui Tang ,  Yue Liu ,  Jiun-Ting Lee ,  Shengyuan Wang ,  Xiaomin Liu

    IPC: G11B5/31 ,  G11B5/23 ,  G11B5/48

    Abstract: A PMR (perpendicular magnetic recording) write head configured for thermally assisted magnetic recording (TAMR) and microwave assisted magnetic recording (MAMR) is made adaptive to writing at different frequencies by inserting thin layers of magnetic material into the material filling the side gaps (SG) between the magnetic pole (MP) and the side shields (SS). At high frequencies, the thin magnetic layers saturate and lower the magnetic potential of the bulky side shields

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