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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
Applicant: Western Digital Technologies, Inc.
Inventor： Alexander Goncharov , Muhammad Asif Bashir , Petrus Antonius Van Der Heijden , Yunfei Ding , Zhigang Bai , James Terrence Olson
CPC classification number: G11B5/3116 , G11B5/23
Abstract: 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：US11881237B1
公开(公告)日：2024-01-23
申请号：US17456440
申请日：2021-11-24
Applicant: Western Digital Technologies, Inc.
Inventor： Muhammad Asif Bashir , Edward Hin Pong Lee , Amanda Baer , Aron Pentek , Zhigang Bai , Yunfei Ding , James Terrence Olson , Alexander Goncharov , Petrus Antonius Van Der Heijden
CPC classification number: G11B5/315 , G11B5/11 , G11B5/1278 , G11B5/235 , G11B5/314 , G11B5/3116 , G11B5/3133 , G11B5/3146 , G11B5/21 , G11B2005/0024
Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a current flow in a cross-track direction around a 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 main pole and the trailing shield. A hot seed layer is disposed between the trailing gap and the trailing shield. A first insulation layer is disposed between the hot seed layer and the trailing shield, where the first insulation layer contacts the side shields. A second insulation layer is disposed between the main pole and leading shield, where the second insulation layer contacts the side shields. The first and second insulation layers direct the current through the side shields and across the main pole in a cross-track direction.
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公开(公告)号：US11011190B2
公开(公告)日：2021-05-18
申请号：US16857423
申请日：2020-04-24
Applicant: Western Digital Technologies, Inc.
Inventor： James Terrence Olson , Hiroyuki Hoshiya , Alexander Goncharov , Masato Shiimoto , Mikito Sugiyama
Abstract: A write head for a data storage device comprises a main pole, a trailing shield, and a write-field enhancement structure disposed in a write gap between the main pole and the trailing shield. The write-field enhancement structure comprises a non-magnetic spacer, a non-magnetic layer, and a magnetic DC-field-generation (DFG) layer. The DFG layer is sandwiched between the non-magnetic layer and the non-magnetic spacer. The write head also includes at least one magnetic notch adjacent to at least one of the main pole or the trailing shield. The non-magnetic spacer is adjacent to a magnetic notch. Some embodiments include multiple magnetic notches. Also disclosed are data storage devices comprising such write heads.
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公开(公告)号：US10706877B2
公开(公告)日：2020-07-07
申请号：US16276480
申请日：2019-02-14
Applicant: Western Digital Technologies, Inc.
Inventor： Alexander Goncharov , Muhammad Asif Bashir , James Terrence Olson , Petrus Antonius Van Der Heijden
Abstract: A magnetic recording head is disclosed having a main pole, a shield hot seed layer positioned at a first side of the main pole, a first material positioned at both a second side and a third side of the main pole, the first material connected to the main pole, a second material positioned adjacent to the first material on the second side and the third side of the main pole, the second material comprised of a spin torque layer, a third material positioned adjacent to the second material on the second side and the third side of the main pole, a fourth material positioned adjacent to the third material on the second side and the third side of the main pole and a side shield connected on an exterior side of the fourth material.
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公开(公告)号：US11508401B1
公开(公告)日：2022-11-22
申请号：US17183155
申请日：2021-02-23
Applicant: Western Digital Technologies, Inc.
Inventor： Muhammad Asif Bashir , Petrus Antonius Van Der Heijden , James Terrence Olson , Alexander Goncharov , Zhigang Bai , Yunfei Ding
IPC: G11B11/105 , G11B5/31
Abstract: Aspects of the present disclosure generally relate to a magnetic recording head of a magnetic recording device that facilitates generating a downtrack magnetic bias field to enhance writing. During magnetic writing using the magnetic recording head, a bias current is directed in a cross-track direction on the trailing side of the main pole. Bias current flowing in the cross-track direction on a leading side of the main pole is reduced or eliminated. The bias current flowing in the cross-track direction on the trailing side of the main pole facilitates generating a magnetic field in a downtrack direction. The magnetic field in the downtrack direction is a bias field generated using the bias current. The magnetic bias field in the downtrack direction facilitates enhanced writing performance and increased areal density capability (ADC) for magnetic recording.
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Patent Agency Ranking
公开(公告)号：US10997990B2
公开(公告)日：2021-05-04
申请号：US16911083
申请日：2020-06-24
Applicant: Western Digital Technologies, Inc.
Inventor： Alexander Goncharov , Muhammad Asif Bashir , James Terrence Olson , Petrus Antonius Vanderheijden
Abstract: A magnetic recording head is disclosed having a main pole, a shield hot seed layer positioned at a first side of the main pole, a first material positioned at both a second side and a third side of the main pole, the first material connected to the main pole, a second material positioned adjacent to the first material on the second side and the third side of the main pole, the second material comprised of a spin torque layer, a third material positioned adjacent to the second material on the second side and the third side of the main pole, a fourth material positioned adjacent to the third material on the second side and the third side of the main pole and a side shield connected on an exterior side of the fourth material.
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公开(公告)号：US10546603B2
公开(公告)日：2020-01-28
申请号：US16440922
申请日：2019-06-13
Applicant: Western Digital Technologies, Inc.
Inventor： James Terrence Olson , Hiroyuki Hoshiya , Alexander Goncharov , Masato Shiimoto , Mikito Sugiyama
Abstract: Disclosed herein are magnetic write heads and hard disk drives comprising such magnetic write heads. A magnetic head comprises a magnetic pole, a first shield separated from the magnetic pole at an air-bearing surface (ABS) of the magnetic head, a magnetic layer disposed between the magnetic pole and the first shield, wherein the magnetic layer comprises at least of iron, cobalt, or nickel, a first non-magnetic layer disposed between the magnetic pole and the magnetic layer, and a second non-magnetic layer disposed between the magnetic layer and the first shield, wherein the magnetic layer is the only magnetic layer at the ABS that is between the main pole and the first shield that is not adjacent to the main pole or the first shield.
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公开(公告)号：US10366714B1
公开(公告)日：2019-07-30
申请号：US15659767
申请日：2017-07-26
Applicant: Western Digital Technologies, Inc.
Inventor： James Terrence Olson , Hiroyuki Hoshiya , Alexander Goncharov , Masato Shiimoto , Mikito Sugiyama
Abstract: Disclosed herein are magnetic write heads for providing spin-torque-assisted write field enhancement, and hard disk drives comprising such magnetic write heads. Within the write gap, each magnetic write head comprises a main pole, a trailing shield, a spacer disposed between the main pole and the trailing shield, a non-magnetic layer disposed between the main pole and the trailing shield, and a magnetic DC-field-generation (DFG) layer adjacent to the spacer and disposed between the spacer and the non-magnetic layer. In some embodiments, the DFG layer is the only magnetic layer within the write gap that is not adjacent to the main pole or the trailing shield.
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9.发明授权公开(公告)号：US11894026B1
公开(公告)日：2024-02-06
申请号：US17845788
申请日：2022-06-21
Applicant: Western Digital Technologies, Inc.
Inventor： Alexander Goncharov , Muhammad Asif Bashir , Petrus Antonius Van Der Heijden , Yunfei Ding , Zhigang Bai , James Terrence Olson
CPC classification number: G11B5/115
Abstract: 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：US11869548B1
公开(公告)日：2024-01-09
申请号：US17183161
申请日：2021-02-23
Applicant: Western Digital Technologies, Inc.
Inventor： Muhammad Asif Bashir , Petrus Antonius Van Der Heijden , James Terrence Olson , Alexander Goncharov , Zhigang Bai , Yunfei Ding
CPC classification number: G11B5/315 , G11B5/3116
Abstract: Aspects of the present disclosure generally relate to a magnetic recording head assembly that includes an external alternating current (AC) source. A magnetic recording head of the magnetic recording head assembly includes a conductive structure between a main pole and a trailing shield. The conductive structure includes a conductive layer, and the conductive layer is nonmagnetic. The magnetic recording head assembly also includes an external AC source to supply AC current that flows through the conductive structure. In one aspect, the conductive structure is between a coil structure and the trailing shield, and the external AC source is coupled to the coil structure. The conductive structure and the external AC source facilitate consistently providing an enhanced AC writing field to facilitate effective and reliable writing, high ADC, high SNR, and reduced jitter.
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