公开(公告)号：US10997988B1

公开(公告)日：2021-05-04

申请号：US16015163

申请日：2018-06-21

Applicant: Western Digital Technologies, Inc.

Inventor： Quang Le ,  Michael Kuok San Ho ,  Suping Song ,  Goncalo Baiao De Albuquerque

IPC: G11B5/127 ,  G11B5/39 ,  G11B5/31 ,  G11B5/00

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 trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure (or non-magnetic conductive layers) adjacent to the main pole and in contact with the STO. The non-magnetic conductive structure provides additional paths for electrical currents to flow to the STO. The non-magnetic conductive structure enables higher current density to the STO without creating hot spots at the MFS. Maximum current efficiency and uniformity can be achieved with the non-magnetic conductive structure.

公开(公告)号：US11557317B2

公开(公告)日：2023-01-17

申请号：US17448167

申请日：2021-09-20

Applicant: Western Digital Technologies, Inc.

Inventor： Xiaoyong Liu ,  Goncalo Baiao De Albuquerque ,  Daniele Mauri ,  Yukimasa Okada

IPC: G11B5/39

Abstract: The present disclosure generally relates to a read head of a data storage device. The read head includes a read sensor sandwiched between two shields. The shields can have different materials as well as a different number of layers. Furthermore the shields can be fabricated by different processes and have different heights and thicknesses. The ratio of the thickness to the height for the shields are substantially identical to ensure that the saturation field are substantially identical and balanced.

公开(公告)号：US11199594B2

公开(公告)日：2021-12-14

申请号：US16728514

申请日：2019-12-27

Applicant: Western Digital Technologies, Inc.

Inventor： Daniele Mauri ,  Alexander M. Zeltser ,  Goncalo Baiao De Albuquerque ,  Yuankai Zheng ,  Christian Kaiser

IPC: G01R33/09 ,  G11B5/39 ,  B82Y25/00

Abstract: Embodiments of the present disclosure generally relate to a large field range TMR sensor of magnetic tunnel junctions (MTJs) with a free layer having an intrinsic anisotropy. In one embodiment, a tunnel magnetoresistive (TMR) based magnetic sensor in a Wheatstone configuration includes at least one MTJ. The MTJ includes a free layer having an intrinsic anisotropy produced by deposition at a high oblique angle from normal. Magnetic domain formations within the free layer can be further controlled by a pinned layer canted at an angle to the intrinsic anisotropy of the free layer, by a hard bias element, by shape anisotropy, or combinations thereof.

公开(公告)号：US11170807B1

公开(公告)日：2021-11-09

申请号：US16909785

申请日：2020-06-23

Applicant: Western Digital Technologies, Inc.

Inventor： Xiaoyong Liu ,  Goncalo Baiao De Albuquerque ,  Daniele Mauri ,  Yukimasa Okada

IPC: G11B5/39

Abstract: The present disclosure generally relates to a read head of a data storage device. The read head includes a read sensor sandwiched between two shields. The shields can have different materials as well as a different number of layers. Furthermore the shields can be fabricated by different processes and have different heights and thicknesses. The ratio of the thickness to the height for the shields are substantially identical to ensure that the saturation field are substantially identical and balanced.

公开(公告)号：US11049513B1

公开(公告)日：2021-06-29

申请号：US16811816

申请日：2020-03-06

Applicant: Western Digital Technologies, Inc.

Inventor： Quang Le ,  Kuok San Ho ,  Suping Song ,  Goncalo Baiao De Albuquerque

IPC: G11B5/235 ,  G11B5/31 ,  G11B5/127 ,  G11B5/39 ,  G11B5/00

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 trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure (or non-magnetic conductive layers) adjacent to the main pole and in contact with the STO. The non-magnetic conductive structure provides additional paths for electrical currents to flow to the STO. The non-magnetic conductive structure enables higher current density to the STO without creating hot spots at the MFS. Maximum current efficiency and uniformity can be achieved with the non-magnetic conductive structure.