公开(公告)号：US08879208B1

公开(公告)日：2014-11-04

申请号：US14093969

申请日：2013-12-02

Applicant: Headway Technologies, Inc.

Inventor： Yue Liu ,  Yaguang Wei ,  Yuhui Tang ,  Moris Dovek

IPC: G11B5/127

CPC classification number: G11B5/3146 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116

Abstract: An umbrella shield (UmS) is included as the uppermost magnetic layer in a trailing shield design in a read/write head to reduce stray field effects, lower bit error rate, and improve protrusion profile for better touch down detection. The UmS may be exposed or recessed from an air bearing surface (ABS), and has a cross-track width, down-track thickness, and length toward a back side that is greater than the corresponding width, thickness, and length dimensions of an underlying PP3 trailing shield. UmS may substantially conform to an arched PP3 shield shape or may be a flat layer. An insulation layer with a thickness of at least 0.3 microns is formed between the UmS and PP3 trailing shield to prevent undesirable coupling. The UmS preferably has a width greater than any other shield in the read/write head.

Abstract translation: 伞形屏蔽（UmS）被包括在读/写头中的尾部屏蔽设计中的最上层的磁性层，以减少杂散场效应，降低误码率，并改善突出轮廓，以实现更好的触摸降低检测。 UmS可以从空气轴承表面（ABS）暴露或凹入，并且具有跨越轨道宽度，下轨道厚度和朝向背侧的长度，其大于相应的宽度，厚度和长度尺寸 底层PP3后盾。 UmS可以基本上符合拱形PP3屏蔽形状或者可以是平坦层。 在UmS和PP3后挡板之间形成厚度至少为0.3微米的绝缘层，以防止不期望的耦合。 UmS优选地具有大于读/写头中的任何其它屏蔽的宽度。

公开(公告)号：US20140307348A1

公开(公告)日：2014-10-16

申请号：US13863495

申请日：2013-04-16

Applicant: HEADWAY TECHNOLOGIES, INC.

Inventor： Tai Min ,  Suping Song ,  Yuhui Tang ,  Lijie Guan

IPC: G11B5/127

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

Abstract: A magnetic write head is fabricated with its main pole attached to and magnetically coupled to a tapered yoke. The tapered yoke can be a top yoke (on the trailing side of the pole), a bottom yoke (on the leading side of the pole) or a combination of top and bottom configurations. The tapered portion of the yoke is at the distal end of the yoke and it is an extension of an otherwise uniformly thick yoke. It is found that the taper enables the yoke to be close to the ABS for better response times and a high data rate, while simultaneously being distant, producing less field disturbance by the shields and corresponding improvement of BER, and ATE/WATE. A taper of 45° is optimal for its production of uniform magnetization of the pole and optimal response times.

Abstract translation: 制造磁性写头，其主极附接到磁耦合到锥形轭。 锥形轭可以是顶部磁轭（在磁极的后侧），底部磁轭（在磁极的前导侧）或顶部和底部结构的组合。 轭的锥形部分位于轭的远端，并且是其它均匀厚的轭的延伸部。 已经发现，锥形使轭能够靠近ABS以获得更好的响应时间和高数据速率，同时远程，由屏蔽产生更少的场干扰和相应的BER改善和ATE / WATE。 45°的锥度对于产生极的均匀磁化和最佳响应时间是最佳的。

公开(公告)号：US20240347072A1

公开(公告)日：2024-10-17

申请号：US18625025

申请日：2024-04-02

Applicant: Headway Technologies, Inc.

Inventor： Xiaomin Liu ,  Wenjie Chen ,  Yue Liu ,  Weihao Xu ,  Yuhui Tang ,  Feiyue Li

IPC: G11B5/115 ,  G11B5/11 ,  G11B5/127

CPC classification number: G11B5/115 ,  G11B5/112 ,  G11B5/1278

Abstract: The present embodiments relate to a PMR write head with a trailing shield that comprises a FeCoNiM composition. The FeCoNiM composition can be formed via an electroplating process by adding Fe2+, Co2+, Ni2+ and a transition metal salt to an aqueous solution comprised of other additives in an electroplating cell that has an Ni or Co as the anode. The plated HD magnetic material as the trailing shield in a PMR writer can minimize a wide area track erasure (WATE). Further, a high moment high damping shield can lower bit error rate (BER) and increase aerial density capability (ADC) of the write head.

公开(公告)号：US20240312483A1

公开(公告)日：2024-09-19

申请号：US18122362

申请日：2023-03-16

Applicant: Headway Technologies, Inc.

Inventor： Yu-Hsia Chen ,  Weihao Xu ,  Jiun-Ting Lee ,  Weisheng Hu ,  Yuhui Tang ,  Yue Liu

IPC: G11B5/11 ,  G11B5/127

CPC classification number: G11B5/112 ,  G11B5/1278

Abstract: The present embodiments relate to a perpendicular magnetic recording (PMR) write head with a self-aligned side gap insulator. A self-aligned SG oxide insulator can reduce or eliminate the current from MP to SS. The SG insulator can force the writer current to go through a writer gap and leading gap, which can improve ATI and TPI performance.

公开(公告)号：US11790940B2

公开(公告)日：2023-10-17

申请号：US16022858

申请日：2018-06-29

Applicant: Headway Technologies, Inc.

Inventor： Sanghyun Lim ,  Yuhui Tang ,  Yaguang Wei ,  Yue Liu ,  Moris Dovek

IPC: G11B5/31 ,  G11B5/127

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

Abstract: A method of forming a PMR (perpendicular magnetic recording) head that includes a tapered write pole that is fully surrounded by wrapped-around magnetic shields, including laterally disposed side shields, a trailing shield and a leading shield. A layer of high magnetic saturation material (high Bs) is formed on the leading edge of the trailing shield and extends rearward, away from the ABS plane to define a cross-sectional write gap shape that is not conformal with the shape of the tapered write pole. The cross-sectional shape of this shield layer enables it to absorb flux from the write pole so that the flux for writing is enhanced and concentrated at the area of the recording medium being written upon and does not extend to adjacent tracks or to downtrack positions at which such flux is not desired.

公开(公告)号：US11295767B2

公开(公告)日：2022-04-05

申请号：US16209136

申请日：2018-12-04

Applicant: Headway Technologies, Inc.

Inventor： Ying Liu ,  Yuhui Tang ,  Yue Liu ,  Kei Hirata

IPC: G11B5/11

Abstract: A PMR (perpendicular magnetic recording) write head includes a main write pole (MP) that is surrounded by magnetic shields, including laterally disposed side shields (SS), a trailing shield (TS) and a leading shield (LS). The leading shield includes a leading-edge taper (LET) that conformally abuts a tapered side of the write pole. The leading-edge shield and the leading-edge taper can be independently recessed in a proximal direction away from an air bearing surface (ABS) plane so that one or the other of them is recessed and the other remains coplanar with the ABS, or both are recessed by independent amounts. In another configuration the LS is not planar but has a recessed portion in a center track region and two surrounding regions that are coplanar with the ABS plane.

公开(公告)号：US11170802B2

公开(公告)日：2021-11-09

申请号：US16507177

申请日：2019-07-10

Applicant: Headway Technologies, Inc.

Inventor： Yuhui Tang ,  Ying Liu

IPC: G11B5/31 ,  G11B5/127 ,  G11B25/04 ,  G11B5/39 ,  G11B5/11 ,  G11B5/00

Abstract: A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width.

公开(公告)号：US11056133B2

公开(公告)日：2021-07-06

申请号：US17024859

申请日：2020-09-18

Applicant: Headway Technologies, Inc.

Inventor： Yuhui Tang ,  Ying Liu

IPC: G11B5/31 ,  G11B5/127 ,  G11B25/04 ,  G11B5/39 ,  G11B5/11 ,  G11B5/00

Abstract: A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width.

公开(公告)号：US10861486B1

公开(公告)日：2020-12-08

申请号：US16507179

申请日：2019-07-10

Applicant: Headway Technologies, Inc.

Inventor： Yuhui Tang ,  Ying Liu

IPC: G11B5/31 ,  G11B5/265 ,  G11B5/11 ,  G11B5/105 ,  G11B5/127 ,  G11B5/00 ,  G11B5/23

Abstract: A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width.

公开(公告)号：US10832707B1

公开(公告)日：2020-11-10

申请号：US16916497

申请日：2020-06-30

Applicant: Headway Technologies, Inc.

Inventor： Wenyu Chen ,  Ying Liu ,  Yan Wu ,  Yuhui Tang

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/133

Abstract: A perpendicular magnetic recording writer has a main pole (MP) with a first flux guiding (FG) device in a write gap between the MP trailing side and a trailing shield, and a second FG device in the leading gap (LG) and each side gap (SG). The SG angle is reduced to 15° to 45° to enable conformal and more uniform FG device layers to be formed in the SG and LG. As a result, the MP shape and write field are more reproducible. To compensate for a thinner MP thickness at the air bearing surface that results from maintaining the track width at a shallower SG angle, an upper MP tip may be formed on the lower MP tip thereby generating a hexagonal shape for the combined MP tip. In this case, the second FG device conforms to the shape of the two upper MP tip sides and trailing side.