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

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/23

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.

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：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

IPC: G11B5/235 ,  G11B5/23 ,  G11B5/31 ,  G11B5/127 ,  G11B5/39 ,  G11B5/245 ,  G11B5/00 ,  G11B5/48

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.

公开(公告)号：US20210158839A1

公开(公告)日：2021-05-27

申请号：US17001593

申请日：2020-08-24

Applicant: Western Digital Technologies, Inc.

Inventor： Thao A. NGUYEN ,  Michael Kuok San HO ,  Zhigang BAI ,  Zhanjie LI ,  Quang LE

IPC: G11B5/09 ,  G11B5/31 ,  G11B5/187 ,  G11B5/60 ,  G11B5/40 ,  G11B5/23

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.

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

IPC: G11B5/37 ,  G11B5/127 ,  G11B5/31 ,  G11B5/235

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.