公开(公告)号：US20230280420A1

公开(公告)日：2023-09-07

申请号：US18197913

申请日：2023-05-16

Applicant: TDK CORPORATION

Inventor： Norikazu OTA ,  Hiraku HIRABAYASHI ,  Kazuma YAMAWAKI ,  Shuhei MIYAZAKI ,  Kazuya WATANABE

IPC: G01R33/09 ,  G01R33/02

CPC classification number: G01R33/098 ,  G01R33/0206 ,  G01R33/093

Abstract: A magnetic sensor device includes at least one magnetic sensor and a support. A center of gravity of an element layout area of the at least one magnetic sensor is deviated from a center of gravity of a reference plane of the support. The at least one magnetic sensor includes four resistor sections constituted by a plurality of magnetoresistive elements. Magnetization of a free layer in each of two of the resistor sections includes a component in a third magnetization direction. The magnetization of a free layer in each of the other two resistor sections includes a component in a fourth magnetization direction opposite to the third magnetization direction.

公开(公告)号：US20230099490A1

公开(公告)日：2023-03-30

申请号：US18077285

申请日：2022-12-08

Applicant: TDK CORPORATION

Inventor： Norikazu OTA ,  Kenzo MAKINO ,  Hiraku HIRABAYASHI

IPC: G01R15/20 ,  G01R33/09

Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a helical coil. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction. The helical coil includes a parallel connection including first and second parts extending in a second axis direction inclined with respect to the first axis direction. The first and second parts are adjacent to each other in a third axis direction and coupled to each other in parallel. The helical coil is wound around the magnetoresistive effect element while extending along the third axis direction. The magnetoresistive effect film overlaps the first and second parts in a fourth axis direction orthogonal to the second and third axis directions. The helical coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in the third axis direction.

公开(公告)号：US20210156933A1

公开(公告)日：2021-05-27

申请号：US17084376

申请日：2020-10-29

Applicant: TDK CORPORATION

Inventor： Kenzo MAKINO ,  Norikazu OTA

IPC: G01R33/09 ,  H01F7/20

Abstract: A magnetic sensor includes at least one MR element and a coil. The coil includes at least one conductor portion. The at least one conductor portion is each located at a position such that a partial magnetic field generated by the conductor portion is applied to one of the at least one MR element, the one corresponding to the conductor portion, and extends along an imaginary curve curving to protrude in a direction away from the corresponding MR element.

公开(公告)号：US20180211686A1

公开(公告)日：2018-07-26

申请号：US15416065

申请日：2017-01-26

Applicant: TDK Corporation

Inventor： Yuki NISHIMURA ,  Norikazu OTA

IPC: G11B5/48 ,  G11B5/60

CPC classification number: G11B5/314 ,  G11B5/1278 ,  G11B5/6088 ,  G11B2005/0021

Abstract: A thermally assisted magnetic recording head has a waveguide that propagates laser light as propagating light; a main pole that has a first end portion on an air bearing surface (ABS) facing a magnetic recording medium and that emits a magnetic flux to the magnetic recording medium; a metal layer that is positioned between the main pole and the waveguide, that extends from a second end portion positioned on the ABS in a height direction, that generates surface plasmons from the propagating light, and that generates near-field light (NF light) from the surface plasmons at the second end portion; and a dielectric body layer that is surrounded by the metal layer and that extends from a third end portion positioned on the ABS in a height direction.