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    WRITER WITH ADAPTIVE SIDE GAP
    3.
    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

    申请人： Headway Technologies, Inc.

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

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

    摘要： 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

    RhIr alloy near-field transducer with Rh template layer in a thermally assisted magnetic recording (TAMR) application
    4.
    发明授权
    RhIr alloy near-field transducer with Rh template layer in a thermally assisted magnetic recording (TAMR) application 有权

    公开(公告)号：US11043240B1

    公开(公告)日：2021-06-22

    申请号：US16800029

    申请日：2020-02-25

    申请人： Headway Technologies, Inc.

    发明人： Koji Shimazawa ,  Shengyuan Wang

    IPC分类号： G11B13/08 ,  G11B5/00

    摘要： A near field transducer (NFT) with an upper RhIr layer having an Ir content from 20-80 atomic % and a lower Au layer is formed between a waveguide and main pole at an air bearing surface (ABS). The RhIr layer has a rod-like front portion (peg) up to height h1, and a substantially triangular shaped back portion (body) from h1 to height h2. In some embodiments, there is a Rh underlayer with a thickness from 10 Angstroms to 200 Angstroms between the upper and lower NFT layers, and extending from the ABS to h2 so that the RhIr layer has a substantially uniform microcrystalline structure throughout to prevent thermally induced rupture defects proximate to h1. Optionally, the Rh underlayer may have a front side at h1, and may further comprise a lower Al or Zr adhesion layer. Accordingly, there is improved device reliability.

    Self-aligned hybrid Au—Rh near field transducer for enhanced reliability
    5.
    发明授权
    Self-aligned hybrid Au—Rh near field transducer for enhanced reliability 有权

    公开(公告)号：US10262683B2

    公开(公告)日：2019-04-16

    申请号：US15011892

    申请日：2016-02-01

    申请人： Headway Technologies, Inc.

    发明人： Matteo Staffaroni ,  Xuhui Jin ,  Weihao Xu ,  Cherng-Chyi Han ,  Weisheng Hu ,  Shengyuan Wang

    IPC分类号： G11B5/00 ,  G11B5/31 ,  G11B5/60

    摘要： A near field transducer (NFT) is formed between a waveguide and main pole layer at an air bearing surface (ABS). The NFT includes a resonator body layer made of Au, for example, with a front side at a first plane that is recessed a first distance from the ABS and a back side that is at a second plane formed parallel to the ABS and first plane. The NFT also has a peg layer with a rectangular peg portion between the ABS and first plane, and a larger back portion between the first and second planes that overlays directly above the resonator body layer. The peg layer is preferably made of Rh to improve mechanical stability of the NFT without significantly degrading overall optical efficiency of the NFT. A blocker may be formed between the ABS and waveguide to prevent light not coupled to the NFT from reaching the ABS.

    Method of fabricating single Rh layer optical field enhancer with pre-focusing structures
    8.
    发明授权
    Method of fabricating single Rh layer optical field enhancer with pre-focusing structures 有权

    公开(公告)号：US10186288B1

    公开(公告)日：2019-01-22

    申请号：US15966179

    申请日：2018-04-30

    申请人： Headway Technologies, Inc.

    发明人： Weihao Xu ,  Cherng-Chyi Han ,  Weisheng Hu ,  Shengyuan Wang ,  Wen-Ding Huang ,  Ittetsu Kitajima

    IPC分类号： G11B5/127 ,  G11B11/05 ,  G11B5/48 ,  C23F4/00 ,  C23C16/50 ,  C23C16/56 ,  C23C16/455 ,  G11B19/20 ,  G11B5/00

    摘要： A method of forming a TAMR (thermally assisted magnetic recording) write head that uses weakly plasmonic materials that are mechanically strong and thermally stable to create plasmon near field energy. The replacement of highly plasmonic materials like Au with a weakly plasmonic material like Rh avoids the thermal deformations of softer metals like Au. To maintain the performance of the head, it includes pre-focusing structures that concentrate plasmon energy as it moves towards the air bearing surface (ABS). A waveguide blocker at the distal end of the waveguide enhances the plasmons at the interface between the blocker and the dielectric material at the distal end of the waveguide. A pair of symmetrically disposed optical side shields (OSS) are formed to either side of the pole tip and a weakly plasmonic optical field enhancer of sharply defined line-width further strengthens the optical field at its point of application. The resulting structure can be effectively used in a magnetic recording apparatus such as a hard disk drive.