公开(公告)号：US11854584B1

公开(公告)日：2023-12-26

申请号：US17876900

申请日：2022-07-29

Applicant: Western Digital Technologies, Inc.

Inventor： Muhammad Asif Bashir ,  Alexander Goncharov ,  Takuya Matsumoto ,  Petrus Antonius Van Der Heijden

IPC: G11B5/00 ,  G11B5/31 ,  G11B5/60

CPC classification number: G11B5/6088 ,  G11B2005/0021

Abstract: The present disclosure relates to heat-assisted magnetic recording (HAMR) write heads including a waveguide and a main pole having a main pole tip. One or more current paths are provided through the main pole tip. Terminals of the one or more current paths can be coupled to the main pole, a trailing shield, a leading shield, a heat sink layer, a touch pad, a pole diffusion barrier layer, a NTS sensor, or another suitable component of the HAMR write head.

公开(公告)号：US11646053B2

公开(公告)日：2023-05-09

申请号：US17355590

申请日：2021-06-23

Applicant: Western Digital Technologies, Inc.

Inventor： David J. Seagle ,  Alexander Goncharov ,  Robert G. Biskeborn

IPC: G11B5/48 ,  G11B5/265 ,  G11B5/29 ,  G11B5/008 ,  G11B5/23 ,  G11B5/39 ,  G11B15/46 ,  G11B5/11

CPC classification number: G11B5/3967 ,  G11B5/00817 ,  G11B5/23 ,  G11B5/265 ,  G11B5/29 ,  G11B5/3958 ,  G11B5/4893 ,  G11B5/11 ,  G11B15/46

Abstract: The present disclosure generally relates to a tape drive including a tape head. The tape head comprises at least one same gap verify (SGV) module comprising a plurality of write transducer and read transducer pairs disposed on a substrate. In each pair, the write transducer comprises a write pole having a height, and the read transducer comprises a first shield disposed adjacent to the write pole. The write pole and the first shield of each pair are spaced apart a distance greater than or equal to about 20% of the height of the write pole. The SGV module is configured to write data to a tape using the write transducer of each pair and read verify the data written on the tape using the read transducer of each pair such that the write transducer and read transducer of each pair are concurrently operable.

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.

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

IPC: G11B5/235 ,  G11B5/31 ,  G11B5/11 ,  G11B5/23 ,  G11B5/127 ,  G11B5/00

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.

公开(公告)号：US10891977B1

公开(公告)日：2021-01-12

申请号：US16924074

申请日：2020-07-08

Applicant: Western Digital Technologies, Inc.

Inventor： Alexander Goncharov ,  Muhammad Asif Bashir ,  Petrus Antonius Van Der Heijden

IPC: G11B5/31 ,  G11B5/35 ,  G11B5/127 ,  G11B5/11 ,  G11B5/00

Abstract: A microwave assisted magnetic recording (MAMR) write head includes a main pole and a trailing shield. A spin torque oscillator device is disposed between the main pole and the trailing shield. The spin torque oscillator device includes a free layer. A trailing shield hot seed layer is disposed between the spin torque oscillator device and the trailing shield. The trailing shield hot seed layer includes a magnetic material doped with a rare earth element. In certain embodiments, the trailing shield hot seed layer includes the rare earth element in an atomic percent content from about 2% to about 10% atomic percent. In certain embodiments, the trailing shield hot seed layer has an intrinsic damping from about 0.02 to about 0.2.

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

IPC: G11B5/39 ,  G11B5/00

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.

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

IPC: G11B5/00 ,  G11B5/39

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.