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1.发明申请公开(公告)号：US20200327900A1
公开(公告)日：2020-10-15
申请号：US16911143
申请日：2020-06-24
Applicant: Western Digital Technologies, Inc.
Inventor： Zhigang BAI , Alexander TARATORIN , Anna ZHENG , Venkatesh CHEMBROLU , Supradeep NARAYANA , Suping SONG , Yaguang WEI , Terence LAM , Michael Kuok San HO , Changqing SHI , Lijie GUAN
Abstract: A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.
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2.发明申请公开(公告)号：US20210074322A1
公开(公告)日：2021-03-11
申请号：US17039840
申请日：2020-09-30
Applicant: Western Digital Technologies, Inc.
Inventor： Suping SONG , Zhanjie LI , Terence LAM , Lijie GUAN
Abstract: Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.
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公开(公告)号：US20200381011A1
公开(公告)日：2020-12-03
申请号：US16995656
申请日：2020-08-17
Applicant: Western Digital Technologies, Inc.
Inventor： Muhammad ASIF BASHIR , Yaguang WEI , Petrus Antonius VAN DER HEIJDEN , Xinjiang SHEN , Terence LAM , Zhigang BAI , Youfeng ZHENG , Changqing SHI , Michael Kuok San HO , Jian-Gang ZHU , Lijie GUAN , Venkatesh CHEMBROLU
Abstract: Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to storage devices employing an energy-assisted magnetic recording write head. The write head may comprise a main pole, a trailing shield, a conducting gap disposed between the main pole and the trailing shield, and one or more current blockers. The conducting gap may be conformal with the main pole. The one or more current blockers may be configured to direct the current from the main pole to the trailing shield through the conducting gap. The one or more current blockers may be further configured to recess the conducting gap away from the media facing surface. The one or more current blockers may be configured to direct the current away from a media facing surface of the write head.
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公开(公告)号：US20220238135A1
公开(公告)日：2022-07-28
申请号：US17721137
申请日：2022-04-14
Applicant: Western Digital Technologies, Inc.
Inventor： Zhigang BAI , Youfeng ZHENG , Venkatesh CHEMBROLU , Supradeep NARAYANA , Yaguang WEI , Suping SONG , Terence T. LAM , Kuok San HO , Changqing SHI , Lijie GUAN , Jian-Gang ZHU
Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.
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公开(公告)号：US20210125631A1
公开(公告)日：2021-04-29
申请号：US17141068
申请日：2021-01-04
Applicant: Western Digital Technologies, Inc.
Inventor： Zhigang BAI , Anna ZHENG , Venkatesh CHEMBROLU , Supradeep NARAYANA , Yaguang WEI , Suping SONG , Terence LAM , Michael Kuok San HO , Changqing SHI , Lijie GUAN , Jian-Gang ZHU
Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20220343944A1
公开(公告)日：2022-10-27
申请号：US17860343
申请日：2022-07-08
Applicant: Western Digital Technologies, Inc.
Inventor： Suping SONG , Zhanjie LI , Terence T. LAM , Lijie GUAN
Abstract: Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.
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公开(公告)号：US20220108715A1
公开(公告)日：2022-04-07
申请号：US17644231
申请日：2021-12-14
Applicant: Western Digital Technologies, Inc.
Inventor： Suping SONG , Zhanjie LI , Terence LAM , Changqing SHI , Lijie GUAN
Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole, an EAMR stack disposed on the main pole, and a trailing shield disposed on the EAMR stack. The EAMR stack comprises a seed layer disposed on the main pole, a spin torque layer disposed on the seed layer, and a spacer layer disposed on the spin torque layer. At least one surface of the spacer layer in contact with the spin torque layer has a smaller or reduced area than the spin torque layer. The at least one surface of the spacer layer in contact with the spin torque layer is recessed from a media facing surface and has a smaller cross-track width than the spin torque layer and a smaller width in the stripe height direction than the spin torque layer.
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公开(公告)号：US20210082458A1
公开(公告)日：2021-03-18
申请号：US17107611
申请日：2020-11-30
Applicant: Western Digital Technologies, Inc.
Inventor： Zhanjie LI , Suping SONG , Lijie GUAN
Abstract: A magnetic recording head includes a trailing shield and a main pole. A trailing shield gap is between the trailing shield and the main pole. A spin orbital torque structure is within the trailing shield gap. The spin orbital torque structure includes a spin torque layer having a first side and a second side at a media facing surface. A first spin Hall layer is along the first side of the spin torque layer. A second spin Hall layer is along the second side of the spin torque layer. The first spin Hall layer comprises a heavy metal material having a positive spin Hall angle. The second spin Hall layer comprises a heavy metal material having a negative spin Hall angle.
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公开(公告)号：US20230178104A1
公开(公告)日：2023-06-08
申请号：US17541794
申请日：2021-12-03
Applicant: Western Digital Technologies, Inc.
Inventor： Yingjian CHEN , Yonghua CHEN , Anna ZHENG , Zhanjie LI , Yi WANG , Jian Xiang SHEN , Lijie GUAN
IPC: G11B5/39
CPC classification number: G11B5/3912
Abstract: The present disclosure generally relates to magnetic recording devices with stable magnetization. The magnetic recording device comprises a lower leading shield, an upper leading shield disposed on the lower leading shield, a main pole disposed above the upper leading shield, a trailing shield disposed above the main pole and upper leading shield, and an upper return pole disposed above the trailing shield. A first non-magnetic layer is disposed between the lower leading shield and the upper leading shield, and a second non-magnetic layer is disposed between the trailing shield and the upper return pole. The lower leading shield has a different domain state than the upper leading shield, and the trailing shield and the upper leading shield have a same domain state. The materials and thickness of the first and second non-magnetic layers result in magnetostatic coupling or anti-ferromagnetic coupling.
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公开(公告)号：US20220208220A1
公开(公告)日：2022-06-30
申请号：US17697859
申请日：2022-03-17
Applicant: Western Digital Technologies, Inc.
Inventor： Zhigang BAI , Youfeng ZHENG , Venkatesh CHEMBROLU , Supradeep NARAYANA , Yaguang WEI , Suping SONG , Terence T. LAM , Kuok San HO , Changqing SHI , Lijie GUAN , Jian-Gang ZHU
Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.
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