公开(公告)号：US20180277147A1

公开(公告)日：2018-09-27

申请号：US15990092

申请日：2018-05-25

申请人： Headway Technologies, Inc.

发明人： Yue Liu ,  Ying Liu ,  Yuhui Tang ,  Jiun-Ting Lee ,  Moris Dovek ,  Yiming Wang

IPC分类号： G11B5/31 ,  G11B5/187 ,  G11B5/127 ,  G11B5/008 ,  G11B5/39

CPC分类号： G11B5/3116 ,  G11B5/00826 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/1871 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/3912

摘要： A PMR writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer magnetic layers with an 8-16 kiloGauss (kG) saturation magnetic moment (Ms) on each side of a center stack with a lower write gap, a middle hot seed layer (Ms of 19-24 kG), and an upper magnetic layer (Ms of 16-24 kG). The hot seed layer, upper TS magnetic layer and overlying PP3 TS promote improved area density capability (ADC). A second TS layer with Ms of 16-24 kG and a full width at the ABS may be formed on the upper magnetic layer.

公开(公告)号：US09330690B2

公开(公告)日：2016-05-03

申请号：US14139051

申请日：2013-12-23

申请人： Headway Technologies, Inc.

发明人： Yiming Wang ,  Tobias Maletzky ,  Xuhui Jin ,  Dayu Zhou ,  Joe Smyth ,  Moris Dovek

IPC分类号： G11B5/127 ,  H04R31/00 ,  G11B5/11 ,  G11B5/31 ,  G11B5/60 ,  G11B5/00

CPC分类号： G11B5/112 ,  G11B5/1278 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021 ,  Y10T29/49048

摘要： A method of forming a TAMR (Thermal Assisted Magnetic Recording) write head that uses the energy of optical-laser excited plasmons to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The magnetic field of the write head is enhanced by the formation of a leading shield that is formed in a concave geometrical shape and partially surrounds the waveguide portion of the head within the concavity, which allows the distal end of the waveguide to extend to the ABS plane of the write head. This arrangement reduces the gap between the shield and the magnetic pole and does not interfere with the ability of the waveguide to efficiently transfer its optical energy to the plasmon generator and, ultimately, to the surface of the magnetic recording medium.

摘要翻译： 一种形成TAMR（热辅助磁记录）写头的方法，其使用光激光激发等离子体激元的能量来局部加热磁记录介质并降低其矫顽力和磁各向异性。 通过形成形成为凹形几何形状并且部分地围绕凹部内的头部的波导部分的前屏蔽件的形成来增强写入头的磁场，这允许波导的远端延伸到ABS 写头的平面。 这种布置减小了屏蔽和磁极之间的间隙，并且不干扰波导有效地将其光能传递到等离子体激元发生器并且最终传递到磁记录介质的表面的能力。

公开(公告)号：US20180144768A1

公开(公告)日：2018-05-24

申请号：US15357105

申请日：2016-11-21

申请人： Headway Technologies, Inc.

发明人： Yue Liu ,  Ying Liu ,  Yuhui Tang ,  Jiun-Ting Lee ,  Moris Dovek ,  Yiming Wang

IPC分类号： G11B5/60 ,  G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/00826 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/3912

摘要： A PMR writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer 8-16 kG portions on each side of a center stack with a lower write gap, a middle 19-24 kG (hot seed) layer, and an upper 16-24 kG TS layer each having a first cross-track width. The hot seed layer, upper 16-24 kG TS layer and an overlying PP3 trailing shield promote improved area density capability (ADC). A second 16-24 kG TS layer having a full width at the ABS may be formed on the first 16-24 kG TS layer.

公开(公告)号：US09852752B1

公开(公告)日：2017-12-26

申请号：US15235171

申请日：2016-08-12

申请人： Headway Technologies, Inc.

发明人： Tsutomu Chou ,  Kouji Shimazawa ,  Tobias Maletzky ,  Weihao Xu ,  Shinji Hara ,  Yoshihiro Tsuchiya ,  Yiming Wang ,  Cherng-Chyi Han ,  Xuhui Jin

IPC分类号： G11B11/00 ,  G11B5/48 ,  G11B5/60 ,  G11B5/31 ,  G11B5/00 ,  G11B11/105

CPC分类号： G11B5/4866 ,  G11B5/1278 ,  G11B5/3106 ,  G11B5/3136 ,  G11B5/314 ,  G11B5/3163 ,  G11B5/6082 ,  G11B5/6088 ,  G11B11/10506 ,  G11B11/1051 ,  G11B2005/0021

摘要： A TAMR (thermal assisted magnetic recording) write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field.

公开(公告)号：US20190295571A1

公开(公告)日：2019-09-26

申请号：US16424622

申请日：2019-05-29

申请人： Headway Technologies, Inc.

发明人： Yue Liu ,  Ying Liu ,  Yuhui Tang ,  Jiun-Ting Lee ,  Moris Dovek ,  Yiming Wang

IPC分类号： G11B5/31 ,  G11B5/187 ,  G11B5/127

摘要： A method of forming a PMR writer with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of >0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer magnetic layers with an 8-16 kiloGauss (kG) saturation magnetic moment (Ms) on each side of a center stack with a lower write gap, a middle hot seed layer (Ms of 19-24 kG), and an upper magnetic layer (Ms of 16-24 kG). The hot seed layer and upper TS magnetic layer promote improved area density capability (ADC). A second TS layer with Ms of 16-24 kG and a full width at the ABS may be formed on the upper magnetic layer.

公开(公告)号：US08755256B2

公开(公告)日：2014-06-17

申请号：US13676490

申请日：2012-11-14

申请人： Headway Technologies, Inc.

发明人： Tobias Maletzky ,  Xuhui Jin ,  Yiming Wang ,  Dayu Zhou ,  Joe Smyth ,  Moris Dovek

IPC分类号： G11B11/00

CPC分类号： G11B13/04 ,  G02B6/1226 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the near field energy of optical-laser excited plasmon eigenmodes in a plasmon resonator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The plasmon resonator is formed as a conducting disk-shaped structure with an extending peg that serves to further confine the near fields within a small region of the recording medium. The resonator eigenmodes are excited, through direct or evanescent coupling, by an interference pattern formed by the overlap of optical waves within a dual-channel waveguide, the interference pattern being the result of the waves in one branch being phase-shifted relative to the waves in the other branch.

摘要翻译： TAMR（热辅助磁记录）写头使用等离子体激元谐振器中的激光激发等离子体激元等离子体本征模态的近场能来局部加热磁记录介质并降低其矫顽力和磁各向异性。 等离子体激元谐振器形成为具有延伸钉的导电盘形结构，其用于进一步将近场限制在记录介质的小区域内。 谐振器本征模通过直接或消逝耦合被由双通道波导内的光波重叠形成的干涉图形激发，干涉图案是一个分支中相对于波相移的结果的结果 在另一个分支。

公开(公告)号：US10311899B2

公开(公告)日：2019-06-04

申请号：US15990092

申请日：2018-05-25

申请人： Headway Technologies, Inc.

发明人： Yue Liu ,  Ying Liu ,  Yuhui Tang ,  Jiun-Ting Lee ,  Moris Dovek ,  Yiming Wang

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/187 ,  G11B5/39 ,  G11B5/008

摘要： A PMR writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer magnetic layers with an 8-16 kiloGauss (kG) saturation magnetic moment (Ms) on each side of a center stack with a lower write gap, a middle hot seed layer (Ms of 19-24 kG), and an upper magnetic layer (Ms of 16-24 kG). The hot seed layer, and upper TS magnetic layer promote improved area density capability (ADC). A second TS layer with Ms of 16-24 kG and a full width at the ABS may be formed on the upper magnetic layer.

公开(公告)号：US09990942B1

公开(公告)日：2018-06-05

申请号：US15357105

申请日：2016-11-21

申请人： Headway Technologies, Inc.

发明人： Yue Liu ,  Ying Liu ,  Yuhui Tang ,  Jiun-Ting Lee ,  Moris Dovek ,  Yiming Wang

IPC分类号： G11B5/187 ,  G11B5/31 ,  G11B5/127 ,  G11B5/39 ,  G11B5/008

CPC分类号： G11B5/3116 ,  G11B5/00826 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/3912

摘要： A PMR writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer magnetic layers with an 8-16 kiloGauss (kG) saturation magnetic moment on each side of a center stack with a lower write gap, a middle hot seed layer having a 19-24 kG saturation magnetic moment, and an upper magnetic layer with a 16-24 kG saturation magnetic moment, and each having a first cross-track width. The hot seed layer, upper TS magnetic layer and an overlying PP3 trailing shield promote improved area density capability (ADC).

公开(公告)号：US09653101B1

公开(公告)日：2017-05-16

申请号：US15283467

申请日：2016-10-03

申请人： Headway Technologies, Inc.

发明人： Ying Liu ,  Yiming Wang ,  Yuhui Tang ,  Yue Liu ,  Sanghyun Lim

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/11

CPC分类号： G11B5/3116 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/3169

摘要： A perpendicular magnetic recording (PMR) writer is disclosed wherein a hybrid side shield (hSS) has an inner 15-24 kG hot seed layer formed between a gap layer and an outer hSS layer to improve tracks per inch capability while maintaining acceptable adjacent track interference (ATI). The outer hSS layer has a magnetization saturation (Ms) value from 10-19 kG and less than that of the inner hot seed layer. The inner hot seed layer has a far side that is 100 to 500 nm from a center of the main pole and may be coplanar with the sidewalls of an overlying write gap and 19-24 kG trailing shield layer. As a result, the side shield return field is substantially improved over a full side shield made of 12-16 kG material. Meanwhile, the trailing shield return field is substantially the same to enable better area density capability (ADC).

公开(公告)号：US20140133283A1

公开(公告)日：2014-05-15

申请号：US13676490

申请日：2012-11-14

申请人： HEADWAY TECHNOLOGIES, INC.

发明人： Tobias Maletzky ,  Xuhui Jin ,  Yiming Wang ,  Dayu Zhou ,  Joe Smyth ,  Moris Dovek

IPC分类号： G11B13/04

CPC分类号： G11B13/04 ,  G02B6/1226 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the near field energy of optical-laser excited plasmon eigenmodes in a plasmon resonator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The plasmon resonator is formed as a conducting disk-shaped structure with an extending peg that serves to further confine the near fields within a small region of the recording medium. The resonator eigenmodes are excited, through direct or evanescent coupling, by an interference pattern formed by the overlap of optical waves within a dual-channel waveguide, the interference pattern being the result of the waves in one branch being phase-shifted relative to the waves in the other branch.

摘要翻译： TAMR（热辅助磁记录）写头使用等离子体激元谐振器中的激光激发等离子体激元等离子体本征模态的近场能来局部加热磁记录介质并降低其矫顽力和磁各向异性。 等离子体激元谐振器形成为具有延伸钉的导电盘形结构，其用于进一步将近场限制在记录介质的小区域内。 谐振器本征模通过直接或消逝耦合被由双通道波导内的光波重叠形成的干涉图形激发，干涉图案是一个分支中相对于波相移的结果的结果 在另一个分支。