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

IPC: G11B5/115 ,  G11B5/31 ,  G11B5/127 ,  G11B5/187

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.

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

IPC: G11B5/115 ,  G11B5/31 ,  G11B5/127 ,  G11B5/187

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.

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

IPC: G11B5/31 ,  G11B5/235 ,  G11B5/012 ,  G11B5/127 ,  G11B5/02

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.

公开(公告)号：US20240379119A1

公开(公告)日：2024-11-14

申请号：US18229081

申请日：2023-08-01

Applicant: Western Digital Technologies, Inc.

Inventor： Muhammad ASIF BASHIR ,  Suping SONG ,  Yaguang WEI ,  Terence T. LAM ,  Petrus Antonius VAN DER HEIJDEN

IPC: G11B5/115

Abstract: The present disclosure generally relates to a magnetic recording system comprising a magnetic recording head. The magnetic recording head comprises a main pole disposed at a media facing surface (MFS). The main pole is disposed between a trailing shield and a leading shield, the trailing shield and the leading shield each extending to the MFS. A first lead is disposed between the main pole and the trailing shield, and the first lead is recessed from the MFS. A first portion of the first lead is disposed in contact with the main pole. A first insulating layer is disposed between and in contact with a second portion of the first lead and the main pole, and the first insulating layer being recessed from the MFS. The first lead and the first insulating layer direct a current through the main pole at a location recessed from the MFS.

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.

公开(公告)号：US20220358959A1

公开(公告)日：2022-11-10

申请号：US17869325

申请日：2022-07-20

Applicant: Western Digital Technologies, Inc.

Inventor： Venkatesh H CHEMBROLU ,  Muhammad ASIF BASHIR ,  Petrus Antonius VAN DER HEIJDEN ,  Terence T. LAM ,  Yaguang WEI

IPC: G11B5/31

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 a MAMR stack including at least one magnetic layer. The magnetic layer has a surface facing the main pole, and the surface has a first side at a media facing surface (MFS) and a second side opposite the first side. The length of the second side is substantially less than the length of the first side. By reducing the length of the second side, the area to be switched at a location recessed from the MFS is reduced as a current flowing from the main pole to the trailing shield or from the trailing shield to the main pole. With the reduced area of the magnetic layer, the overall switch time of the magnetic layer is decreased.