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公开(公告)号：US20210280208A1
公开(公告)日：2021-09-09
申请号：US17330176
申请日：2021-05-25
Applicant: Western Digital Technologies, Inc.
Inventor： Suping SONG , Zhanjie LI , Michael Kuok San HO , Quang LE , Alexander M. ZELTSER
Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a heavy metal layer disposed between the main pole and the trailing shield at the MFS. Spin-orbit torque (SOT) is generated from the heavy metal layer and transferred to a surface of the main pole as a current passes through the heavy metal layer in a cross-track direction. The SOT executes a torque on the surface magnetization of the main pole, which reduces the magnetic flux shunting from the main pole to the trailing shield. With the reduced magnetic flux shunting from the main pole to the trailing shield, write-ability is improved.
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2.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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公开(公告)号：US20200176022A1
公开(公告)日：2020-06-04
申请号：US16451744
申请日：2019-06-25
Applicant: Western Digital Technologies, Inc.
Inventor： Zhanjie LI , Suping SONG , Michael Kuok San HO
Abstract: A magnetic recording device includes a main pole, a coil around the main pole, a trailing shield, and a spin torque oscillation device between the main pole and the trailing shield. The spin torque oscillation device includes one or more first layers, a spacer layer, and a field generation layer. The one or more first layers are over the main pole. The one or more first layers have a first heat conductance or include a low-heat-conductance material. The spacer layer is over the one or more first layers. The field generation layer is over the spacer layer. A heat sink is in contact with the trailing shield. The heat sink has a second heat conductance or includes a high-heat-conductance material. The second heat conductance of the heat sink is higher than the first heat conductance of the one or more first layers.
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公开(公告)号：US20180033458A1
公开(公告)日：2018-02-01
申请号：US15727953
申请日：2017-10-09
Applicant: Western Digital Technologies, Inc.
Inventor： Kuok San HO , Suping SONG , Petrus Antonius Van Der Heijden
IPC: G11B5/60
CPC classification number: G11B5/60 , G11B5/1278 , G11B5/23 , G11B5/3116 , G11B5/315
Abstract: A system, according to one embodiment, includes: a main pole; and a trailing shield. A first distance D1 is defined in a track direction between the trailing shield and a pole tip region of the main pole; and a second distance D2 is defined in the track direction between the trailing shield and a second region of the main pole located behind the pole tip region, where D2 is greater than D1. Other systems, and methods are described in additional embodiments.
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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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Patent Agency Ranking
公开(公告)号：US20210233559A1
公开(公告)日：2021-07-29
申请号：US17229560
申请日：2021-04-13
Applicant: Western Digital Technologies, Inc.
Inventor： Quang LE , Michael Kuok San HO , Suping SONG , Goncalo Marcos BAIÃO DE ALBUQUERQUE
Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure (or non-magnetic conductive layers) adjacent to the main pole and in contact with the STO. The non-magnetic conductive structure provides additional paths for electrical currents to flow to the STO. The non-magnetic conductive structure enables higher current density to the STO without creating hot spots at the MFS. Maximum current efficiency and uniformity can be achieved with the non-magnetic conductive structure.
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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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公开(公告)号：US20190147907A1
公开(公告)日：2019-05-16
申请号：US16243851
申请日：2019-01-09
Applicant: Western Digital Technologies, Inc.
Inventor： Zhanjie LI , Suping SONG , Michael Kuok San HO
CPC classification number: G11B5/1278 , G01R33/1284 , G11B5/3116 , G11B5/3133 , G11B5/314 , G11B5/315 , G11B2005/0008 , G11B2005/0024 , G11C11/18 , H01L27/222 , H01L43/04 , H01L43/08
Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole, a trailing shield, and an oscillator located between the main pole and the trailing shield. The oscillator is disposed at a media facing surface (MFS). The oscillator includes a spin-torque layer sandwiched between two distinct spin Hall layers. The two distinct spin Hall layers generate spin-orbit torque (SOT) that induces in-plane precessions on opposite surfaces of the spin-torque layer, and both in-plane precessions are in the same direction. The same-direction in-plane precessions on opposite surfaces of the spin-torque layer reduce the critical current of the oscillation of the oscillator, leading to high quality recording.
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公开(公告)号：US20220358957A1
公开(公告)日：2022-11-10
申请号：US17868586
申请日：2022-07-19
Applicant: Western Digital Technologies, Inc.
Inventor： Suping SONG , Zhanjie LI , Kuok San HO , Quang LE , Alexander M. ZELTSER
Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a heavy metal layer disposed between the main pole and the trailing shield at the MFS. Spin-orbit torque (SOT) is generated from the heavy metal layer and transferred to a surface of the main pole as a current passes through the heavy metal layer in a cross-track direction. The SOT executes a torque on the surface magnetization of the main pole, which reduces the magnetic flux shunting from the main pole to the trailing shield. With the reduced magnetic flux shunting from the main pole to the trailing shield, write-ability is improved.
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10.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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