公开(公告)号：US11782104B2

公开(公告)日：2023-10-10

申请号：US17366622

申请日：2021-07-02

Applicant: TDK CORPORATION

Inventor： Yoshiaki Tanaka ,  Tetsuya Hiraki ,  Kazuya Watanabe ,  Suguru Watanabe

IPC: G01R33/09

CPC classification number: G01R33/093 ,  G01R33/098

Abstract: A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.

公开(公告)号：US10418546B2

公开(公告)日：2019-09-17

申请号：US15835628

申请日：2017-12-08

Applicant: TDK Corporation

Inventor： Tetsuya Hiraki ,  Naoki Ohta ,  Hiraku Hirabayashi ,  Yoshiaki Tanaka

IPC: H01L43/02 ,  H01L27/22

Abstract: A magnetic sensor is provided which can improve density of magnetoresistance effect elements without narrowing the wiring pitch. A plurality of element array layers 10 are stacked one on another, each of the element array layers including a plurality of magnetoresistance effect elements 1 arranged in parallel in an in-plane direction, and magnetoresistance effect elements 1 in the plurality of element array layers 10 are connected in series to each other.

公开(公告)号：US12204004B2

公开(公告)日：2025-01-21

申请号：US18240671

申请日：2023-08-31

Applicant: TDK CORPORATION

Inventor： Yoshiaki Tanaka ,  Tetsuya Hiraki ,  Kazuya Watanabe ,  Suguru Watanabe

IPC: G01R33/09

Abstract: A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.

公开(公告)号：US11054490B2

公开(公告)日：2021-07-06

申请号：US15919530

申请日：2018-03-13

Applicant: TDK CORPORATION

Inventor： Yoshiaki Tanaka ,  Tetsuya Hiraki ,  Kazuya Watanabe ,  Suguru Watanabe

IPC: G01R33/09 ,  H01L43/08

Abstract: A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.

公开(公告)号：US20180275216A1

公开(公告)日：2018-09-27

申请号：US15919530

申请日：2018-03-13

Applicant: TDK CORPORATION

Inventor： Yoshiaki Tanaka ,  Tetsuya Hiraki ,  Kazuya Watanabe ,  Suguru Watanabe

IPC: G01R33/09 ,  H01L43/08

CPC classification number: G01R33/091 ,  G01R33/093 ,  G01R33/098 ,  H01L43/08

Abstract: A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.