公开(公告)号：US20220236346A1

公开(公告)日：2022-07-28

申请号：US17575197

申请日：2022-01-13

Applicant: TDK CORPORATION

Inventor： Hirokazu TAKAHASHI ,  Kenzo MAKINO

IPC: G01R33/09

Abstract: A magnetic sensor includes an MR element and a support member. The support member has an opposed surface including a first inclined portion, and a bottom surface. In a given cross section, the first inclined portion is inclined at a first angle at a first position, and inclined at a second angle smaller than the first angle at a second position. The absolute value of a curvature of the first inclined portion at the first position is less than the absolute value of the curvature of the first inclined portion at the second position. The MR element is provided on the first inclined portion so that the first edge is located above the first position in a given cross section.

公开(公告)号：US20220229126A1

公开(公告)日：2022-07-21

申请号：US17569097

申请日：2022-01-05

Applicant: TDK CORPORATION

Inventor： Hirokazu TAKAHASHI ,  Kenzo MAKINO

IPC: G01R33/09

Abstract: A magnetic sensor includes an MR element. The MR element includes a free layer. The free layer has a first surface having a shape that is long in one direction and a second surface located opposite the first surface, and has a thickness that is a dimension in a direction perpendicular to the first surface. The first surface has a first edge and a second edge located at both lateral ends of the first surface. In a given cross section, the thickness at the first edge is smaller than the thickness at a predetermined point on the first surface between the first edge and the second edge.

公开(公告)号：US20180172781A1

公开(公告)日：2018-06-21

申请号：US15715348

申请日：2017-09-26

Applicant: TDK Corporation

Inventor： Naoki OHTA ,  Hirokazu TAKAHASHI ,  Satoshi MIURA

IPC: G01R33/02 ,  G01R33/00 ,  G01R33/09

Abstract: A triaxial magnetic sensor that can detect with high precision magnetic fields in three axial directions comprises a substrate having a first surface and a second surface opposite the first surface, and a magnetic sensor element group provided on the first surface. The magnetic sensor element group includes a first magnetic sensor element for magnetic detection in the x-axis direction, a second magnetic sensor element for magnetic detection in the y-axis direction and a third magnetic sensor element for magnetic detection in the z-axis direction. The first through third magnetic sensor elements respectively contain first through third magneto-resistive effect elements composed of laminated bodies including at least a magnetization fixed layer and a free layer, and the magnetization direction of each of the magnetization fixed layers of the first through third magneto-resistive elements is fixed in a direction inclined at a prescribed angle with respect to the first surface.

公开(公告)号：US20170309301A1

公开(公告)日：2017-10-26

申请号：US15138347

申请日：2016-04-26

Applicant: TDK Corporation

Inventor： Hirokazu TAKAHASHI ,  Tetsuya ROPPONGI ,  Yoshikazu SOENO

IPC: G11B5/39

CPC classification number: G11B5/3912 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3146 ,  G11B2005/0024

Abstract: A base multilayer body is made by laminating a seed layer and a buffer layer in respective order. The seed layer is an alloy layer containing tantalum (Ta) and at least one type of other metal, and having an amorphous structure or a microcrystal structure. The buffer layer is an alloy layer having a [001] plane orientation hexagonal close-packed structure and containing at least one type of a group VI metal and at least one type of a group IX metal in the periodic table. With this configuration, a magnetic layer providing a desired magnetic characteristic(s) can be laminated on the thinned base multilayer body.

公开(公告)号：US20200209327A1

公开(公告)日：2020-07-02

申请号：US16694129

申请日：2019-11-25

Applicant: TDK CORPORATION

Inventor： Hirokazu TAKAHASHI ,  Kazuya WATANABE

IPC: G01R33/09

Abstract: A magnetic sensor device includes a magnetic sensor, and a soft magnetic structure disposed near the magnetic sensor. The magnetic sensor and the soft magnetic structure are configured so that when an external magnetic field including a detection-target magnetic field is applied to the magnetic sensor, the external magnetic field is also applied to the soft magnetic structure, and when the soft magnetic structure has a magnetization, a magnetic field based on the magnetization of the soft magnetic structure is applied to the magnetic sensor. The soft magnetic structure has a stripe domain structure.

公开(公告)号：US20200209326A1

公开(公告)日：2020-07-02

申请号：US16695574

申请日：2019-11-26

Applicant: TDK CORPORATION

Inventor： Kazuya WATANABE ,  Hirokazu TAKAHASHI

IPC: G01R33/09 ,  G01R33/022

Abstract: A magnetic sensor device includes a magnetic sensor detecting a detection-target magnetic field, and a soft magnetic structure near the sensor. In an orthogonal coordinate system having two orthogonal axes for representing an applied field strength and a magnetization-corresponding value, coordinates representing the applied field strength and the magnetization-corresponding value move along a minor loop not in contact with a major loop as the strength of an external magnetic field including the detection-target magnetic field varies within a variable range, where the applied field strength is a strength of a magnetic field applied to the soft magnetic structure, the magnetization-corresponding value is a value corresponding to magnetization of the soft magnetic structure, and the major loop is, among loops traced by a path of the coordinates as the applied field strength is varied, a loop that is the largest in terms of area of the region enclosed by the loop.

公开(公告)号：US20190088395A1

公开(公告)日：2019-03-21

申请号：US16116547

申请日：2018-08-29

Applicant: TDK CORPORATION

Inventor： Minoru OTA ,  Tomoyuki SASAKI ,  Hirokazu TAKAHASHI

IPC: H01F10/32 ,  H01L43/08 ,  H01F10/12 ,  G11C11/16 ,  G11C11/18

Abstract: The present disclosure is directed to a spin current magnetization rotational element, a spin-orbit-torque magnetoresistance effect element, a magnetic memory, and a high-frequency magnetic element which can efficiently generate a pure spin current and reduce a reversal current density. The spin current magnetization rotational element includes: a spin-orbit torque wiring extending in a first direction; and a first ferromagnetic layer laminated in a second direction which intersects the first direction, wherein the spin-orbit torque wiring includes at least one rare gas element of Ar, Kr, and Xe.

公开(公告)号：US20180292472A1

公开(公告)日：2018-10-11

申请号：US15908066

申请日：2018-02-28

Applicant: TDK CORPORATION

Inventor： Kenzo MAKINO ,  Suguru WATANABE ,  Yasushi NISHIOKA ,  Hirokazu TAKAHASHI

IPC: G01R33/09 ,  G01R33/07 ,  H01L43/06 ,  H01L43/04

Abstract: A magneto-resistive effect element includes a magnetization free layer, an intermediate layer, and a magnetization pinned layer. The magnetization free layer extends along a first plane. The intermediate layer extends along the first plane, and is stacked on the magnetization free layer. The magnetization pinned layer extends along the first plane, and is provided on side opposite to the magnetization free layer with the intermediate layer being interposed therebetween. Here, the magnetization free layer includes an end surface that has a maximum inclination angle of 42° or less relative to the first plane.

公开(公告)号：US20250093434A1

公开(公告)日：2025-03-20

申请号：US18968123

申请日：2024-12-04

Applicant: TDK CORPORATION

Inventor： Hirokazu TAKAHASHI ,  Kenzo Makino

IPC: G01R33/09

Abstract: A magnetic sensor includes an MR element. The MR element includes a free layer. The free layer has a first surface having a shape that is long in one direction and a second surface located opposite the first surface, and has a thickness that is a dimension in a direction perpendicular to the first surface. The first surface has a first edge and a second edge located at both lateral ends of the first surface. In a given cross section, the thickness at the first edge is smaller than the thickness at a predetermined point on the first surface between the first edge and the second edge.

公开(公告)号：US20240094315A1

公开(公告)日：2024-03-21

申请号：US18517863

申请日：2023-11-22

Applicant: TDK CORPORATION

Inventor： Hirokazu TAKAHASHI ,  Kenzo MAKINO

IPC: G01R33/09

CPC classification number: G01R33/098 ,  G01R33/093

Abstract: A magnetic sensor includes an MR element. The MR element includes a free layer. The free layer has a first surface having a shape that is long in one direction and a second surface located opposite the first surface, and has a thickness that is a dimension in a direction perpendicular to the first surface. The first surface has a first edge and a second edge located at both lateral ends of the first surface. In a given cross section, the thickness at the first edge is smaller than the thickness at a predetermined point on the first surface between the first edge and the second edge.