公开(公告)号：US20250037737A1

公开(公告)日：2025-01-30

申请号：US18416106

申请日：2024-01-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Satoshi SHIROTORI ,  Tazumi NAGASAWA ,  Yoshihiro HIGASHI ,  Akira KIKITSU

IPC: G11B5/31

Abstract: According to one embodiment, a magnetic head includes a reproducing section. The reproducing section includes a first shield, a second shield, a third shield, a fourth shield, a first magnetic layer, a first intermediate layer, and a second intermediate layer. A second direction from the third shield to the fourth shield crosses a first direction from the first shield to the second shield. The first magnetic layer is provided between the first shield and the second shield and between the third shield and the fourth shield. The first intermediate layer is provided between the first shield and the first magnetic layer, and is nonmagnetic. The second intermediate layer is provided between the first magnetic layer and the second shield, and is nonmagnetic. The second intermediate layer length of the second intermediate layer is shorter than a first intermediate layer length of the first intermediate layer along the second direction.

公开(公告)号：US20240233760A9

公开(公告)日：2024-07-11

申请号：US18359959

申请日：2023-07-27

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tazumi NAGASAWA ,  Satoshi SHIROTORI ,  Akira KIKITSU ,  Yoshihiro HIGASHI

IPC: G11B5/39 ,  G01R33/07

CPC classification number: G11B5/3912 ,  G01R33/07

Abstract: According to one embodiment, a magnetic sensor includes first to fourth shields, a first magnetic layer, first and second conductive layers, and first and second intermediate layer. The first magnetic layer is between the third shield and the fourth shield. The first magnetic layer includes a first face and a second face. The first face is between the first shield and the second face. The first conductive layer is provided between the third shield and the first magnetic layer. The second conductive layer is provided between the first magnetic layer and the fourth shield. The first intermediate layer is provided between the first shield and the first magnetic layer. The first intermediate layer includes a first intermediate layer face facing the first face. An area of the first intermediate layer face is smaller than an area of the first face.

公开(公告)号：US20240135967A1

公开(公告)日：2024-04-25

申请号：US18359959

申请日：2023-07-26

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tazumi NAGASAWA ,  Satoshi SHIROTORI ,  Akira KIKITSU ,  Yoshihiro HIGASHI

IPC: G11B5/39 ,  G01R33/07

CPC classification number: G11B5/3912 ,  G01R33/07

Abstract: According to one embodiment, a magnetic sensor includes first to fourth shields, a first magnetic layer, first and second conductive layers, and first and second intermediate layer. The first magnetic layer is between the third shield and the fourth shield. The first magnetic layer includes a first face and a second face. The first face is between the first shield and the second face. The first conductive layer is provided between the third shield and the first magnetic layer. The second conductive layer is provided between the first magnetic layer and the fourth shield. The first intermediate layer is provided between the first shield and the first magnetic layer. The first intermediate layer includes a first intermediate layer face facing the first face. An area of the first intermediate layer face is smaller than an area of the first face.

公开(公告)号：US20220120830A1

公开(公告)日：2022-04-21

申请号：US17395623

申请日：2021-08-06

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hitoshi IWASAKI ,  Satoshi SHIROTORI ,  Akira KIKITSU ,  Yoshihiro HIGASHI

IPC: G01R33/09 ,  G01R15/20

Abstract: According to one embodiment of the invention, a magnetic sensor includes a first element part. The first element part includes a first magnetic element, first and s second structures, a first magnetic member, and a second magnetic member. A direction from the first magnetic layer toward the first counter magnetic layer is along a first direction. The first structure includes a first side magnetic layer. The second structure includes a second side magnetic layer. The first magnetic element is between the first structure and the second structure in a second direction crossing the first direction. The first magnetic element is separated from the first side magnetic layer and the second side magnetic layer. A direction from the first side magnetic layer toward the first magnetic member is along the first direction. A direction from the second side magnetic layer toward the second magnetic member is along the first direction.

公开(公告)号：US20240069071A1

公开(公告)日：2024-02-29

申请号：US18166572

申请日：2023-02-09

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Satoshi SHIROTORI ,  Akira KIKITSU ,  Yoshihiro HIGASHI

IPC: G01R15/20 ,  G01R31/382

CPC classification number: G01R15/20 ,  G01R31/382

Abstract: According to one embodiment, a magnetic sensor includes a first element portion that includes a first magnetic element, a first conductive member, a first magnetic member and a first opposing magnetic member. The first magnetic element includes a first end portion and a first other end portion. A direction from the first end portion to the first other end portion is along a first direction. A second direction from the first conductive member to the first magnetic element crosses the first direction. A third direction from the first magnetic member to the first opposing magnetic member crosses a plane including the first and second directions. At least a part of the first magnetic element is between the first magnetic member and the first opposing magnetic member in position in the third direction. The first magnetic member includes a first other magnetic portion and a first magnetic portion.

公开(公告)号：US20230266411A1

公开(公告)日：2023-08-24

申请号：US17870371

申请日：2022-07-21

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Akira KIKITSU ,  Yoshihiro HIGASHI ,  Satoshi SHIROTORI

IPC: G01R33/09 ,  G01D5/16 ,  H01L43/08

CPC classification number: G01R33/093 ,  G01D5/16 ,  H01L43/08

Abstract: According to one embodiment, a sensor includes an element portion and a controller. The element portion includes a first element. The first element includes a first magnetic element and a first conductive member. The first magnetic element includes a first magnetic layer and a first opposed magnetic layer. The first conductive member includes a first conductive portion and a first other conductive portion. The controller includes a first circuit. The first circuit is connected to the first conductive portion and the first other conductive portion. The first circuit is configured to supply a first current to the first conductive member. The first current includes an alternating current component. A local minimum value of the first current is of a first polarity, and a local maximum value of the first current is of the first polarity.

公开(公告)号：US20210286026A1

公开(公告)日：2021-09-16

申请号：US17019652

申请日：2020-09-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hitoshi IWASAKI ,  Akira KIKITSU ,  Yoshihiro HIGASHI ,  Satoshi SHIROTORI

IPC: G01R33/09

Abstract: According to one embodiment, a magnetic sensor includes a first magnetic part, a first magnetic member, a second magnetic part, a second magnetic member, a first element, a second element, a third element, a fourth element, and a first interconnect. The first magnetic part includes first, second, and third portions. The first portion is between the second and third portions. The second magnetic part includes fourth, fifth, and sixth portions. The fourth portion is between the fifth and sixth portions. The first element includes a first magnetic layer. The second element includes a second magnetic layer. The third element includes a third magnetic layer. The fourth element includes a fourth magnetic layer. The first interconnect includes first and second interconnect portions.

公开(公告)号：US20200069199A1

公开(公告)日：2020-03-05

申请号：US16293689

申请日：2019-03-06

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kazuaki OKAMOTO ,  Yoshihiko FUJI ,  Yoshihiro HIGASHI ,  Shotaro BABA ,  Michiko HARA

IPC: A61B5/021 ,  G01L1/12 ,  H04R19/04 ,  G06F3/041 ,  B81B3/00

Abstract: According to one embodiment, a sensor includes a structure body including a deforming portion, and a first sensing element provided at the deforming portion. The first sensing element includes first to fourth magnetic layers and a first intermediate layer. The first magnetic layer is provided between the second and third magnetic layers. The fourth magnetic layer is provided between the first and third magnetic layers. The first intermediate layer is provided between the second and first magnetic layers. The third magnetic layer includes at least one of a first material or a second material. The first material includes at least one selected from the group consisting of Ir—Mn, Pt—Mn, Pd—Pt—Mn, and Ru—Rh—Mn. The second material includes at least one of CoPt, (CoxPt100-x)100-yCry, or FePt. A crystallinity of at least a portion of the fourth magnetic layer is higher than a crystallinity of the first magnetic layer.

公开(公告)号：US20190086481A1

公开(公告)日：2019-03-21

申请号：US15896123

申请日：2018-02-14

Applicant: Kabushiki Kaisha Toshiba

Inventor： Shotaro BABA ,  Yoshihiko FUJI ,  Akiko YUZAWA ,  Kei MASUNISHI ,  Michiko HARA ,  Shiori KAJI ,  Tomohiko NAGATA ,  Yoshihiro HIGASHI ,  Kazuaki OKAMOTO

IPC: G01R33/00 ,  G01R1/04 ,  G01R33/09 ,  H04R1/02 ,  H04R15/00

Abstract: According to one embodiment, a sensor includes a supporter, a first film portion, a first sensing element, and a first magnetic portion. The first film portion is supported by the supporter, is deformable, and includes a first fixed end extending along a first fixed end direction. A first sensing element is fixed to the first film portion, and includes a first magnetic layer, a first opposing magnetic layer provided between the first magnetic layer and the first film portion, and a first intermediate layer provided between the first magnetic layer and the first opposing magnetic layer. A direction from the first opposing magnetic layer toward the first magnetic layer is aligned with a first element direction. The first magnetic portion includes a first end portion extending along a first end portion direction tilted with respect to the first fixed end direction, and overlaps a portion of the supporter.

公开(公告)号：US20180116535A1

公开(公告)日：2018-05-03

申请号：US15847127

申请日：2017-12-19

Applicant: Kabushiki Kaisha Toshiba

Inventor： Yoshihiko FUJI ,  Hideaki FUKUZAWA ,  Shiori KAJI ,  Akio HORI ,  Tomohiko NAGATA ,  Michiko HARA ,  Yoshihiro HIGASHI ,  Akiko YUZAWA

IPC: A61B5/021 ,  G01L9/16 ,  G01L9/00 ,  G01L1/12 ,  A61B5/00

CPC classification number: A61B5/02141 ,  A61B5/6824 ,  A61B2562/0247 ,  G01L1/125 ,  G01L9/0041 ,  G01L9/16

Abstract: According to one embodiment, a strain sensing element is provided on a film unit configured to be deformed. The strain sensing element includes a functional layer, a first magnetic layer, a second magnetic layer, and a spacer layer. The functional layer includes at least one of an oxide and a nitride. The second magnetic layer is provided between the functional layer and the first magnetic layer. A magnetization of the second magnetic layer is variable in accordance with a deformation of the film unit. The spacer layer is provided between the first magnetic layer and the second magnetic layer. At least a part of the second magnetic layer is amorphous and includes boron.