公开(公告)号：US20210208216A1

公开(公告)日：2021-07-08

申请号：US17212430

申请日：2021-03-25

Applicant: TDK Corporation

Inventor： Yohei HIROTA ,  Hayato MIYASHITA ,  Tsuyoshi UMEHARA ,  Hiraku HIRABAYASHI

IPC: G01R33/09

Abstract: A pair of bias magnets applies a bias magnetic field to the magneto-resistive effect element, the bias magnetic field having a component in a direction such that the component cancels the external magnetic field that is applied to the magneto-resistive effect element and a component that is perpendicular to the external magnetic field. The bias magnet has an elongate cross section in a plane that is parallel both to the external magnetic field and to the bias magnetic field. In a projection plane that is parallel to the cross section and onto which the bias magnets and the magneto-resistive effect element are projected, the bias magnet includes an element facing side that is opposite to the magneto-resistive effect element and that extends in a longitudinal direction. The bias magnet is magnetized in a direction that is perpendicular to the longitudinal direction. The element facing side is longer than other sides.

公开(公告)号：US20180356473A1

公开(公告)日：2018-12-13

申请号：US15992411

申请日：2018-05-30

Applicant: TDK Corporation

Inventor： Yohei HIROTA ,  Hayato MIYASHITA ,  Tsuyoshi UMEHARA ,  Hiraku HIRABAYASHI

IPC: G01R33/09

CPC classification number: G01R33/093 ,  G01R33/096 ,  G01R33/098

Abstract: A pair of bias magnets applies a bias magnetic field to the magneto-resistive effect element, the bias magnetic field having a component in a direction such that the component cancels the external magnetic field that is applied to the magneto-resistive effect element and a component that is perpendicular to the external magnetic field. The bias magnet has an elongate cross section in a plane that is parallel both to the external magnetic field and to the bias magnetic field. In a projection plane that is parallel to the cross section and onto which the bias magnets and the magneto-resistive effect element are projected, the bias magnet includes an element facing side that is opposite to the magneto-resistive effect element and that extends in a longitudinal direction. The bias magnet is magnetized in a direction that is perpendicular to the longitudinal direction. The element facing side is longer than other sides.

公开(公告)号：US20240210212A1

公开(公告)日：2024-06-27

申请号：US18479999

申请日：2023-10-03

Applicant: TDK CORPORATION

Inventor： Yohei HIROTA ,  Shuhei MIYAZAKI ,  Fumiya SADO

IPC: G01D5/16 ,  G01L1/22

CPC classification number: G01D5/16 ,  G01L1/22

Abstract: A sensor device includes a support, a sensor chip, and an electrically-conductive pillar. The support has a first surface. The sensor chip is provided on the first surface and includes a substrate and a sensor element circuitry. The substrate has a second surface. The sensor element circuitry is provided on the second surface. The electrically-conductive pillar is provided on the first surface. The electrically-conductive pillar has a pillar height from the first surface to an upper end of the electrically-conductive pillar. The sensor chip has a chip height from the first surface to the second surface. The pillar height is greater than the chip height. The electrically-conductive pillar includes a structure in which a first tier part having a first cross-sectional area and a second tier part having a second cross-sectional area smaller than the first cross-sectional area are stacked in order from the first surface.

公开(公告)号：US20190316894A1

公开(公告)日：2019-10-17

申请号：US16454284

申请日：2019-06-27

Applicant: TDK CORPORATION

Inventor： Yohei HIROTA ,  Homare TOKIDA ,  Hiraku HIRABAYASHI

IPC: G01B7/30 ,  G01R33/09 ,  G01D5/14

Abstract: A first, a second, and a third computing circuit respectively generate a first post-computation signal with a second harmonic component reduced as compared with first and second signals, a second post-computation signal with the second harmonic component reduced as compared with third and fourth signals, and a third post-computation signal with the second harmonic component reduced as compared with fifth and sixth signals. A fourth and a fifth computing circuit respectively generate a fourth post-computation signal with a third harmonic component reduced as compared with the first and second post-computation signals, and a fifth post-computation signal with the third harmonic component reduced as compared with the second and third post-computation signals. A sixth computing circuit determines a detected angle value based on the fourth and fifth post-computation signals.

公开(公告)号：US20230074404A1

公开(公告)日：2023-03-09

申请号：US17986136

申请日：2022-11-14

Applicant: TDK Corporation

Inventor： Yohei HIROTA ,  Hayato MIYASHITA ,  Tsuyoshi UMEHARA ,  Hiraku HIRABAYASHI

IPC: G01R33/09

Abstract: A pair of bias magnets applies a bias magnetic field to the magneto-resistive effect element, the bias magnetic field having a component in a direction such that the component cancels the external magnetic field that is applied to the magneto-resistive effect element and a component that is perpendicular to the external magnetic field. The bias magnet has an elongate cross section in a plane that is parallel both to the external magnetic field and to the bias magnetic field. In a projection plane that is parallel to the cross section and onto which the bias magnets and the magneto-resistive effect element are projected, the bias magnet includes an element facing side that is opposite to the magneto-resistive effect element and that extends in a longitudinal direction. The bias magnet is magnetized in a direction that is perpendicular to the longitudinal direction. The element facing side is longer than other sides.

公开(公告)号：US20190118309A1

公开(公告)日：2019-04-25

申请号：US16158710

申请日：2018-10-12

Applicant: TDK CORPORATION

Inventor： Yohei HIROTA ,  Hiroshi YAMAZAKI

IPC: B23K35/26 ,  B32B15/01 ,  C22C13/00 ,  C22C1/04 ,  C22C19/03 ,  H05K1/11 ,  H05K1/18 ,  H01L23/00

Abstract: A joint structure includes a first metal part and a second metal part. The first metal part includes a nickel-iron alloy or copper. The second metal part is provided adjacent to the first metal part and includes tin. Out of the first metal part and the second metal part, the first metal part includes a plurality of first metal parts, or out of the first metal part and the second metal part, the second metal part includes a plurality of second metal parts, or the first metal part includes the plurality of first metal parts and the second metal part includes the plurality of second metal parts.

公开(公告)号：US20150066426A1

公开(公告)日：2015-03-05

申请号：US14309742

申请日：2014-06-19

Applicant: TDK CORPORATION

Inventor： Yohei HIROTA ,  Homare TOKIDA ,  Hiraku HIRABAYASHI

IPC: G01B7/30 ,  G01R33/09

CPC classification number: G01B7/30 ,  G01D5/145 ,  G01R33/093

Abstract: A first, a second, and a third computing circuit respectively generate a first post-computation signal with a second harmonic component reduced as compared with first and second signals, a second post-computation signal with the second harmonic component reduced as compared with third and fourth signals, and a third post-computation signal with the second harmonic component reduced as compared with fifth and sixth signals. A fourth and a fifth computing circuit respectively generate a fourth post-computation signal with a third harmonic component reduced as compared with the first and second post-computation signals, and a fifth post-computation signal with the third harmonic component reduced as compared with the second and third post-computation signals. A sixth computing circuit determines a detected angle value based on the fourth and fifth post-computation signals.

Abstract translation: 第一，第二和第三计算电路分别产生与第一和第二信号相比减小的二次谐波分量的第一后计算信号，与第三和第二信号相比二次谐波分量减小的第二后计算信号， 第四信号，以及与第五和第六信号相比二次谐波分量减小的第三后计算信号。 第四和第五计算电路分别产生与第一和第二后计算信号相比减少了三次谐波分量的第四后计算信号，并且与第三和谐分量相比，第三后谐波分量减小 第二和第三后期计算信号。 第六计算电路基于第四和第五后计算信号确定检测角度值。

公开(公告)号：US20230112733A1

公开(公告)日：2023-04-13

申请号：US17886980

申请日：2022-08-12

Applicant: TDK CORPORATION

Inventor： Yohei HIROTA ,  Naoki OHTA

IPC: G01R33/07 ,  G01B7/00 ,  G01D5/14

Abstract: A displacement detection apparatus includes a magnetic field generator, a first soft magnetic body, a second soft magnetic body, and a magnetic detection element. The magnetic field generator extends along a plane orthogonal to a first direction and includes a first portion and a second portion. The first soft magnetic body entirely overlaps the first portion in the first direction. The second soft magnetic body entirely overlaps the second portion in the first direction. The magnetic detection element is disposed in a region between the first soft magnetic body and the second soft magnetic body, and is configured to be subjected to a magnetic field generated by the magnetic field generator. The magnetic field generator, the first soft magnetic body, and the second soft magnetic body are provided to be integrally rotatable, with respect to the magnetic detection element, around a rotation axis extending in the first direction.

公开(公告)号：US20210327846A1

公开(公告)日：2021-10-21

申请号：US17362094

申请日：2021-06-29

Applicant: TDK Corporation

Inventor： Yohei HIROTA ,  Hiroshi YAMAZAKI ,  Hitoshi IWAMA ,  Yusuke TAKAHASHI

IPC: H01L23/00 ,  H01L25/18

Abstract: A stack of electrical components has a first electrical component having a first surface, a second surface that is opposite to the first surface and a side surface that is located between the first surface and the second surface; a second electrical component having a third surface on which the first electrical component is mounted, the third surface facing the second surface and forming a corner portion between the third surface and the side surface; an adhesive layer that bonds the first electrical component to the second electrical component, the adhesive layer has a first portion that is located between the second and third surface and a second portion that is made of a same material as the first portion and that fills the corner portion; and a conductive layer that extends on a side of the side surface, curves along the second portion and extends to the third surface.

公开(公告)号：US20170261346A1

公开(公告)日：2017-09-14

申请号：US15439264

申请日：2017-02-22

Applicant: TDK CORPORATION

Inventor： Yohei HIROTA ,  Hiraku HIRABAYASHI ,  Keisuke UCHIDA ,  Kazuya WATANABE

IPC: G01D5/16

CPC classification number: G01D5/16 ,  G01D5/145

Abstract: A displacement detection unit includes a magnet and a magnetic detector. The magnet includes a first magnetic-pole region polarized into a south pole and a second magnetic-pole region polarized into a north pole, and generates a magnetic field around the magnet. The magnetic detector is movable relative to the magnet in a first direction, and detects a change in the magnetic field and thereby detects a displacement of the magnet in the first direction. The magnet includes a transition section in which a ratio of a magnetic volume of the second magnetic-pole region in a second direction to a magnetic volume of the first magnetic-pole region in the second direction gradually varies in the first direction. The second direction is orthogonal to the first direction.