-
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
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
-
2.发明授权High moment side shield design for area density improvement of perpendicular magnetic recording (PMR) writer 有权垂直磁记录（PMR）作者的面积密度改善的高矩侧面设计公开(公告)号：US09589582B2
公开(公告)日：2017-03-07
申请号：US15162091
申请日：2016-05-23
Applicant: Headway Technologies, Inc. , TDK Corporation
Inventor： Yue Liu , Atsushi Yamaguchi , Yuhui Tang , Jiun-Ting Lee , Yaguang Wei , Xiaomin Liu , Hideyuki Ukita , Moris Dovek , Michitaka Nishiyama
CPC classification number: G11B5/3116 , G11B5/00826 , G11B5/11 , G11B5/1278 , G11B5/187 , G11B5/1871 , G11B5/23 , G11B5/315 , G11B5/3163 , G11B5/3912 , G11B5/6082
Abstract: A PMR writer is disclosed wherein a hot seed layer (HS) made of a 19-24 kilogauss (kG) magnetic material is formed between a gap layer and a 10-16 kG magnetic layer in the side shields, and between the leading gap and a 16-19 kG magnetic layer in the leading shield to improve the track field gradient and cross-track field gradient while maintaining write-ability. The HS is from 10 to 100 nm thick and has a first side facing the write pole with a height of ≦0.15 micron, and a second side facing a main pole flared side that may extend to a full side shield height of ≦0.5 micron. The trailing shield has a second hot seed layer on the write gap and a 16-19 kG magnetic layer that contacts the 10-16 kG side shield magnetic layer thereby forming an all wrap around (AWA) shield configuration.
Abstract translation: 公开了一种PMR写入器，其中在侧面屏蔽之间的间隙层和10-16kG磁性层之间以及在前导间隙和第二磁性层之间形成由19-24千兆（kG）磁性材料制成的热种子层（HS） 一个16-19 kG的磁屏蔽层，以提高轨道场梯度和跨轨道场梯度，同时保持写入能力。 HS为10至100nm厚，并且具有面向高度≤0.15微米的写极的第一面和面向主极扩张侧的第二面，其可延伸至≤0.5微米的全侧屏蔽高度。 后屏蔽在写间隙上具有第二热种子层，以及接触10-16kG侧屏蔽磁性层的16-19kG磁性层，从而形成全包裹（AWA）屏蔽配置。
-
3.发明申请High Moment Side Shield Design for Area Density Improvement of Perpendicular Magnetic Recording (PMR) Writer 审中-公开垂直磁记录（PMR）作者区域密度改进的高瞬时侧屏设计公开(公告)号：US20160307586A1
公开(公告)日：2016-10-20
申请号：US15162091
申请日：2016-05-23
Applicant: Headway Technologies, Inc. , TDK Corporation
Inventor： Yue Liu , Atsushi Yamaguchi , Yuhui Tang , Jiun-Ting Lee , Yaguang Wei , Xiaomin Liu , Hideyuki Ukita , Moris Dovek , Michitaka Nishiyama
CPC classification number: G11B5/3116 , G11B5/00826 , G11B5/11 , G11B5/1278 , G11B5/187 , G11B5/1871 , G11B5/23 , G11B5/315 , G11B5/3163 , G11B5/3912 , G11B5/6082
Abstract: A PMR writer is disclosed wherein a hot seed layer (HS) made of a 19-24 kilogauss (kG) magnetic material is formed between a gap layer and a 10-16 kG magnetic layer in the side shields, and between the leading gap and a 16-19 kG magnetic layer in the leading shield to improve Hy_grad and Hy_grad_x while maintaining write-ability. The HS is from 10 to 100 nm thick and has a first side facing the write pole with a height of ≦0.15 micron, and a second side facing a main pole flared side that may extend to a full side shield height of ≦0.5 micron. First and second sides may form a continuous curve or a double tapered design where first and second sides have different angles with respect to a center plane. The side shield design described herein is especially beneficial for side gaps of 20-60 nm.
Abstract translation: 公开了一种PMR写入器，其中在侧面屏蔽之间的间隙层和10-16kG磁性层之间以及在前导间隙和第二磁性层之间形成由19-24千兆（kG）磁性材料制成的热种子层（HS） 一个16-19 kG的磁屏蔽层，在保持写入能力的同时提高Hy_grad和Hy_grad_x。 HS为10至100nm厚，并且具有面向高度≤0.15微米的写极的第一面和面向主极扩张侧的第二面，其可延伸至≤0.5微米的全侧屏蔽高度。 第一和第二侧可以形成连续曲线或双锥形设计，其中第一和第二侧相对于中心平面具有不同的角度。 本文所述的侧面屏蔽设计对于20-60nm的侧面间隙特别有利。
-
Patent Agency Ranking
4.发明授权Perpendicular magnetic recording (PMR) write shield design with minimized wide adjacent track erasure (WATE) 有权垂直磁记录（PMR）写屏蔽设计，最小化宽的相邻轨道擦除（WATE）公开(公告)号：US09466319B1
公开(公告)日：2016-10-11
申请号：US14847418
申请日：2015-09-08
Applicant: Headway Technologies, Inc.
Inventor： Yuhui Tang , Yaguang Wei , Yue Liu , Moris Dovek , Xiaomin Liu , Feiyue Li , Po-Kang Wang , Luc Thomas
CPC classification number: G11B5/1278 , G11B5/11 , G11B5/112 , G11B5/3116 , G11B5/3143 , G11B5/3146 , G11B5/315 , G11B5/3163
Abstract: A Perpendicular Magnetic Recording (PMR) writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, second trailing shield, and side shields consist of a high damping (HD) magnetic material having a damping constant ≧0.04. A first trailing shield between the write gap and second trailing shield is a 19-24 kG hot seed layer. The HD magnetic layer may be FeNiRe with a Re content of 3 to 15 atomic %. Preferably, the HD magnetic layer has a coercivity
Abstract translation: 披露了一种垂直磁记录（PMR）写入器，其具有全包裹（AWA）屏蔽设计，其中一个或多个前屏蔽，第二拖尾屏蔽和侧屏蔽由具有阻尼的高阻尼（HD）磁性材料组成 常数≥0.04。 写间隙和第二拖尾屏蔽之间的第一个后挡板是19-24kG热种子层。 HD磁性层可以是Re含量为3〜15原子％的FeNiRe。 优选地，HD磁性层具有矫顽磁力<50Oe，为10-19kG材料。 主杆前缘和后侧中的一个或两个可以是锥形的。 宽的相邻轨道擦除被最小化，同时保持区域密度能力。 在其它实施例中，HD磁性材料可以是FeNiM，FeNM，FeCoM或FeCoNiM中的一种，其中M是3d，4d或5d的过渡金属。
-
公开(公告)号：US11348605B1
公开(公告)日：2022-05-31
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
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.
-
6.发明授权High moment side shield design for area density improvement of perpendicular magnetic recording (PMR) writer 有权垂直磁记录（PMR）作者的面积密度改善的高矩侧面设计公开(公告)号：US09361912B1
公开(公告)日：2016-06-07
申请号：US14690693
申请日：2015-04-20
Applicant: Headway Technologies, Inc. , TDK Corporation
Inventor： Yue Liu , Atsushi Yamaguchi , Yuhui Tang , Jiun-Ting Lee , Yaguang Wei , Xiaomin Liu , Hideyuki Ukita , Moris Dovek , Michitaka Nishiyama
CPC classification number: G11B5/3116 , G11B5/00826 , G11B5/11 , G11B5/1278 , G11B5/187 , G11B5/1871 , G11B5/23 , G11B5/315 , G11B5/3163 , G11B5/3912 , G11B5/6082
Abstract: A PMR writer is disclosed wherein a hot seed layer (HS) made of a 19-24 kilogauss (kG) magnetic material is formed between a side gap and a 10-16 kG magnetic layer in the side shields, and between a 16-19 kG magnetic layer and the leading gap in the leading shield to improve Hy_grad and Hy_grad_x while maintaining write-ability. The HS is from 10 to 100 nm thick and has a first side facing the write pole with a height of ≦0.15 micron, and a second side facing a main pole flared side that may extend to a full side shield height of ≦0.5 micron. First and second sides may form a continuous curve or the a double tapered design where first and second sides have different angles with respect to a center plane. The side shield design described herein is especially beneficial for side gaps of 20-60 nm.
Abstract translation: 公开了一种PMR写入器，其中在侧面间隙和侧面屏蔽中的10-16kG磁性层之间形成由19-24千兆（kG）磁性材料制成的热种子层（HS），并且在16-19 kG磁性层和前盾的领先缺口，在保持写入能力的同时提高Hy_grad和Hy_grad_x。 HS为10至100nm厚，并且具有面向写入极的第一侧，高度为＆lt; nlE; 0.15微米，以及面向主极扩张侧的第二面，其可延伸至全侧屏蔽高度＆lt; 微米。 第一和第二侧可以形成连续曲线或双锥形设计，其中第一和第二侧相对于中心平面具有不同的角度。 本文所述的侧面屏蔽设计对于20-60nm的侧面间隙特别有利。
-
公开(公告)号：US11978488B1
公开(公告)日：2024-05-07
申请号：US18133374
申请日：2023-04-11
Applicant: Headway Technologies, Inc.
Inventor： Xiaomin Liu , Wenjie Chen , Yue Liu , Weihao Xu , Yuhui Tang , Feiyue Li
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.
-
8.发明公开公开(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
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.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.036 seconds)
