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1.发明授权公开(公告)号：US12094497B1
公开(公告)日：2024-09-17
申请号：US18240250
申请日：2023-08-30
发明人： Shehrin Sayed , Wenyu Chen , Yue Liu , Kowang Liu , Tetsuya Roppongi , Haowen Ren , Yuhui Tang , Moris Musa Dovek , Wenjie Chen
CPC分类号： G11B5/23 , G11B5/3906 , G11B2005/3996
摘要： The present embodiments can generally provide a magnetic write head structure with optimized gap current distribution to maximize the current-assisted areal density capacity (ADC) gain in hard-disk-drive storage devices. In a first example embodiment, a non-dual-write-shield (nDWS) write head can include a main pole (MP), a trailing shield (TS), and a write gap (WG) disposed between the MP and the TS. The write head can also include a side shield (SS), a leading shield (LS), and a write shield (WS). The write head can include a side gap (SG) between the MP and the SS on both sides of the MP tip, and a leading gap (LG) between the MP and the LS. The write head can also include a coil wrapped around the MP through a PP3 shield that is configured to direct a time-dependent write current to saturate magnetization of the MP.
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公开(公告)号：US11900971B1
公开(公告)日：2024-02-13
申请号：US17845777
申请日：2022-06-21
发明人： Alexander Goncharov , Muhammad Asif Bashir , Petrus Antonius Van Der Heijden , Yunfei Ding , Zhigang Bai , James Terrence Olson
CPC分类号： G11B5/3116 , G11B5/23
摘要： The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a first current flow in a cross-track direction through a trailing shield. In one or more embodiments, a second current flows in a cross-track direction around the main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the side shields and the trailing shield. A high moment seed layer is disposed between the main pole and the trailing shield. A first insulation layer is disposed within the trailing shield and directs the first current through the trailing shield, guided to the proximity of the main pole. A second insulation layer, disposed below the trailing shield, directs the second current through the trailing shield, or alternatively through the side shields and around the main pole.
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公开(公告)号：US20230245679A1
公开(公告)日：2023-08-03
申请号：US18132035
申请日：2023-04-07
发明人： Hiroshi ISOKAWA
CPC分类号： G11B5/3116 , G11B5/4813 , G11B5/23 , G11B25/043 , G11B5/012 , G11B2005/0018
摘要： According to one embodiment, among a plurality of magnetic heads, the larger the magnetic pole width of the magnetic pole of the magnetic head in the width direction of a recording track formed in a recording layer or the larger an area width of the magnetic head capable of reading the magnetic characteristics of an area of the recording layer on which magnetic recording has been carried out by means of the magnetic head, the farther is the magnetic head arranged outwardly from the vicinity of the center in the parallel arrangement direction of the magnetic disks.
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公开(公告)号：US11682421B2
公开(公告)日：2023-06-20
申请号：US17359046
申请日：2021-06-25
IPC分类号： G11B5/48 , G11B5/265 , G11B5/29 , G11B5/008 , G11B5/23 , G11B5/39 , G11B5/115 , G11B5/11 , G11B15/26
CPC分类号： G11B5/3977 , G11B5/00813 , G11B5/115 , G11B5/23 , G11B5/265 , G11B5/2652 , G11B5/29 , G11B5/3958 , G11B5/3967 , G11B5/4893 , G11B5/11 , G11B15/26
摘要： The present disclosure generally relates to a tape drive including a tape head. The tape head comprises at least one same gap verify (SGV) module comprising a plurality of write transducer and read transducer pairs disposed on a substrate. Each pair comprises a null shield disposed between the write transducer and the read transducer. One or more of a position between the write transducer and the read transducer of each pair, a width, a height, a thickness, and a permeability of the null shield is adjusted to create a null region, and the read transducer is disposed in the null region. The SGV module is configured to write data to a tape using the write transducer of each pair and read verify the data written on the tape using the read transducer of each pair such that the write transducer and read transducer of each pair are concurrently operable.
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5.发明授权公开(公告)号：US11657836B2
公开(公告)日：2023-05-23
申请号：US17649246
申请日：2022-01-28
CPC分类号： G11B5/1278 , G11B5/02 , G11B5/23 , G11B5/313 , G11B5/314 , G11B5/315 , G11B5/3133 , G11B5/3146
摘要： Aspects of the present disclosure generally relate to a magnetic recording head of a spintronic device, such as a write head of a data storage device, for example a magnetic media drive. In one example, a magnetic recording head includes a main pole, a trailing shield, and a spin torque layer (STL) between the main pole and the trailing shield. The magnetic recording head includes a first layer structure on the main pole, and the first layer structure includes a negative polarization layer. The magnetic recording head also includes a second layer structure disposed on the negative polarization layer and between the negative polarization layer and the STL. The negative polarization layer is an FeCr layer. The second layer structure includes a Cr layer disposed on the FeCr layer, and a Cu layer disposed on the Cr layer and between the Cr layer and the STL.
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公开(公告)号：US11651782B2
公开(公告)日：2023-05-16
申请号：US17168639
申请日：2021-02-05
发明人： Hiroshi Isokawa
CPC分类号： G11B5/3116 , G11B5/012 , G11B5/23 , G11B5/4813 , G11B25/043 , G11B5/3912 , G11B5/3983 , G11B2005/0018 , G11B2005/0024
摘要： According to one embodiment, among a plurality of magnetic heads, the larger the magnetic pole width of the magnetic pole of the magnetic head in the width direction of a recording track formed in a recording layer or the larger an area width of the magnetic head capable of reading the magnetic characteristics of an area of the recording layer on which magnetic recording has been carried out by means of the magnetic head, the farther is the magnetic head arranged outwardly from the vicinity of the center in the parallel arrangement direction of the magnetic disks.
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公开(公告)号：US11636874B1
公开(公告)日：2023-04-25
申请号：US17509834
申请日：2021-10-25
申请人： TDK CORPORATION
发明人： Zhenyao Tang
摘要： This magnetic recording head includes a main magnetic pole, a write shield, and an oscillation element. The oscillation element has a first oscillation portion, a second oscillation portion, and a non-magnetic conductive layer provided therebetween. The oscillation element has a first current path connecting the main magnetic pole and the non-magnetic conductive layer to each other, and a second current path connecting the write shield and the non-magnetic conductive layer to each other.
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公开(公告)号：US11545175B2
公开(公告)日：2023-01-03
申请号：US17691869
申请日：2022-03-10
发明人： Ying Liu , Shohei Kawasaki , Wenyu Chen , Yuhui Tang
摘要： 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.
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公开(公告)号：US20220415355A1
公开(公告)日：2022-12-29
申请号：US17355590
申请日：2021-06-23
摘要： The present disclosure generally relates to a tape drive including a tape head. The tape head comprises at least one same gap verify (SGV) module comprising a plurality of write transducer and read transducer pairs disposed on a substrate. In each pair, the write transducer comprises a write pole having a height, and the read transducer comprises a first shield disposed adjacent to the write pole. The write pole and the first shield of each pair are spaced apart a distance greater than or equal to about 20% of the height of the write pole. The SGV module is configured to write data to a tape using the write transducer of each pair and read verify the data written on the tape using the read transducer of each pair such that the write transducer and read transducer of each pair are concurrently operable.
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公开(公告)号：US20220165300A1
公开(公告)日：2022-05-26
申请号：US16953925
申请日：2020-11-20
发明人： Ying Liu , Yuhui Tang , Yue Liu , Jiun-Ting Lee , Shengyuan Wang , Xiaomin Liu
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
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