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1.发明申请公开(公告)号：US20210409600A1
公开(公告)日：2021-12-30
申请号：US16915723
申请日：2020-06-29
Applicant: Western Digital Technologies, Inc.
Inventor： Quang Le , Zhigang BAI , Xiaoyong LIU , Zhanjie LI , Kuok San HO , Rajeev NAGABHIRAVA
IPC: H04N5/232 , G02B7/09 , G03B13/36 , H02K41/035 , H04N5/225
Abstract: Aspects of the present disclosure relate to optical devices and related methods that facilitate independent control of movement of lenses and image sensors in camera systems. In one example, an image sensor is movable independently of and relative to a lens, and the lens is movable independently of the image sensor. In one example, an optical device includes a lens, and an image sensor disposed below the lens. The image sensor is movable relative to the lens. The optical device includes a plurality of magnets disposed about the lens, a plurality of vertical coil structures coiled in one or more vertical planes, and one or more horizontal coil structures coiled in one or more horizontal planes. The plurality of vertical coil structures are configured to, when powered, move the image sensor relative to the lens. The one or more horizontal coil structures are configured to, when powered, move the lens.
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公开(公告)号：US20210390976A1
公开(公告)日：2021-12-16
申请号：US17463368
申请日：2021-08-31
Applicant: Western Digital Technologies, Inc.
Inventor： Thao A. NGUYEN , Michael Kuok San HO , Zhigang BAI , Zhanjie LI , Quang LE
Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a first write head, a second write head, at least one read head, and a thermal fly height control element. The first write head is a wide writing write head comprising a first main pole and a first trailing shield. The second write head a narrow writing write head comprising a second main pole, a trailing gap, a second trailing shield, and one or more side shields. The first main pole has a shorter height and a greater width than the second main pole. The second main pole has a curved or U-shaped surface disposed adjacent to the trailing gap. The thermal fly height control element and the at least one read head are aligned with a center axis of the second main pole of the second write head.
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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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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：US20230267953A1
公开(公告)日：2023-08-24
申请号：US17652066
申请日：2022-02-22
Applicant: Western Digital Technologies, Inc.
Inventor： Alexander GONCHAROV , Zhanjie LI , Terence T. LAM , Suping SONG
IPC: G11B5/31
CPC classification number: G11B5/3116 , G11B5/315
Abstract: The present disclosure relates to a magnetic recording head having an exchange biased leading shield or leading edge shield (LES). The LES is a bilayer structure. One or more layers are coupled below the LES such that the LES is disposed between the main pole and the one or more layers. The one or more layers exchange bias the LES such that the upper layer of the LES has a magnetization parallel to the magnetization of the trailing shield. The lower layer of the LES has a magnetization that is antiparallel to the magnetization of the upper layer of the LES. The one or more layers set the preferred direction for the lower layer of the LES and sets the LES as a two-domain state without relying upon the anisotropy field (Hk) of either the upper or lower layers of the LES.
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Patent Agency Ranking
6.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：US20200327899A1
公开(公告)日：2020-10-15
申请号：US16912572
申请日：2020-06-25
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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公开(公告)号：US20190279665A1
公开(公告)日：2019-09-12
申请号：US15976684
申请日：2018-05-10
Applicant: Western Digital Technologies, Inc.
Inventor： Zhanjie LI , Suping SONG , Kuok San HO
Abstract: The present disclosure generally relates to magnetic media devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The recording head includes a main pole, a trailing shield hot seed layer, a spin Hall layer disposed between the main pole and the trailing shield hot seed layer, and a spin-torque layer disposed between the main pole and the trailing shield hot seed layer. Spin-orbit torque (SOT) is generated from the spin Hall layer. The spin-torque layer magnetization switching or precession is induced by the SOT. The SOT based head reduces the switching current and the Vjump due to higher spin polarization ratio, which improves energy efficiency. In addition, the spin Hall layer and the spin-torque layer are easier to form compared to the conventional pseudo spin-valve structure.
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公开(公告)号：US20220078348A1
公开(公告)日：2022-03-10
申请号：US17455862
申请日：2021-11-19
Applicant: Western Digital Technologies, Inc.
Inventor： Quang LE , Rajeev NAGABHIRAVA , Kuok San HO , Zhigang BAI , Zhanjie LI , Xiaoyong LIU , Daniele MAURI
Abstract: Aspects of the present disclosure generally relate to optical devices and related methods that facilitate tilt in camera systems, such as tilt of a lens. In one example, an optical device includes a lens, an image sensor disposed below the lens, a plurality of magnets disposed about the lens, and a plurality of: (1) vertical coil structures coiled in one or more vertical planes and (2) horizontal coil structures coiled in one or more horizontal planes. When power is applied, the coil structures can generate magnetic fields that, in the presence of the magnets, cause relative movement of the coil structures and associated structures. The plurality of vertical coil structures are configured to horizontally move the lens. The plurality of horizontal coil structures are configured to tilt the lens when differing electrical power is applied to at least two of the plurality of horizontal coil structures.
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公开(公告)号：US20220005498A1
公开(公告)日：2022-01-06
申请号：US17395291
申请日：2021-08-05
Applicant: Western Digital Technologies, Inc.
Inventor： Quang LE , Xiaoyong LIU , Zhigang BAI , Zhanjie LI , Kuok San HO , Hisashi TAKANO
Abstract: The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall effect layer, a first free layer, a gap layer, a second spin hall effect layer, a second free layer, and a second shield. The gap layer is disposed between the first spin hall effect layer and the second spin hall effect layer. Electrical lead connections are located about the first spin hall effect layer, the second spin hall effect layer, the gap layer, the first shield, and/or the second shield. The electrical lead connections facilitate the flow of current and/or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).
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