公开(公告)号：US12272476B2

公开(公告)日：2025-04-08

申请号：US17508570

申请日：2021-10-22

Applicant: TDK CORPORATION

Inventor： Tomohito Mizuno ,  Hideaki Fukuzawa ,  Tetsuya Shibata

IPC: H01F10/32 ,  G01R33/09 ,  G11B5/39 ,  H10N50/10 ,  H10N50/85

Abstract: A photodetection element includes: a first ferromagnetic layer configured to be irradiated with light; a second ferromagnetic layer; and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, wherein the first ferromagnetic layer includes a first region in contact with the spacer layer and a second region disposed in a position farther from the space layer than the first region, the first region is made of CoFeB alloy, and the second region is a magnetic material containing Fe and Gd as major constituent elements.

公开(公告)号：US12152934B2

公开(公告)日：2024-11-26

申请号：US18190336

申请日：2023-03-27

Applicant: TDK CORPORATION

Inventor： Takekazu Yamane ,  Tetsuya Shibata ,  Tomohito Mizuno ,  Hideaki Fukuzawa

IPC: G01J1/42

Abstract: An optical device includes a magnetic element and a light application part, wherein the light application part configured to apply light to the magnetic element, the magnetic element includes a first ferromagnetic layer to which the light is applied, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and magnetization of the first ferromagnetic layer is inclined with respect to both an in-plane direction in which the first ferromagnetic layer extends and a surface-perpendicular direction perpendicular to a surface on which the first ferromagnetic layer extends in a state in which the light is not applied from the light application part to the magnetic element.

公开(公告)号：US12085721B2

公开(公告)日：2024-09-10

申请号：US18373007

申请日：2023-09-26

Applicant: TDK CORPORATION

Inventor： Hideaki Fukuzawa ,  Tomohito Mizuno ,  Tetsuya Shibata ,  Tsuyoshi Komaki

IPC: G02B6/12 ,  G02B6/125 ,  G02B27/00 ,  G02B27/01 ,  H10N50/10

CPC classification number: G02B27/0172 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/125 ,  G02B27/0093 ,  H10N50/10 ,  G02B2006/12104 ,  G02B2027/0178

Abstract: This optical waveguide detection element includes a substrate, an optical waveguide layer formed on the substrate, and a photodetector. The optical waveguide layer includes a first optical waveguide in which visible light having a wavelength of 380 nm to 800 nm propagates, a second optical waveguide in which near-infrared light having a wavelength of 801 nm to 2000 nm propagates, and a third optical waveguide in which light propagates to a light receiving surface of the photodetector. A visible light output port of the first optical waveguide from which the visible light is output, a near-infrared light output port of the second optical waveguide from which the near-infrared light is output, and a reflected light input port of the third optical waveguide to which the near-infrared light is reflected and returned are arranged on one end surface of the optical waveguide layer.

公开(公告)号：US11450965B2

公开(公告)日：2022-09-20

申请号：US16202086

申请日：2018-11-28

Applicant: TDK Corporation

Inventor： Tetsuya Shibata

IPC: H01Q1/48 ,  H01Q19/00 ,  H01Q9/04 ,  H01Q21/06

Abstract: Disclosed herein is a patch antenna that includes a first dielectric layer in which a patch conductor is provided, a second dielectric layer in which a signal line extending in a direction parallel to the patch conductor is provided, a feed conductor provided perpendicularly to the patch conductor so as to connect one end of the signal line and a feed point for the patch conductor, a first ground pattern provided between the patch conductor and the signal line, and a second ground pattern provided on an opposite side to the first ground pattern with respect to the signal line. The first dielectric layer has a dielectric constant lower than that of the second dielectric layer.

公开(公告)号：US09966922B2

公开(公告)日：2018-05-08

申请号：US15600066

申请日：2017-05-19

Applicant: TDK CORPORATION

Inventor： Tetsuya Shibata ,  Junichiro Urabe ,  Takekazu Yamane ,  Tsuyoshi Suzuki

IPC: H03H2/00 ,  H01L43/00 ,  G11B5/39

CPC classification number: H03H2/00 ,  G01R33/00 ,  G01R33/093 ,  G01R33/1284 ,  G11B5/3945 ,  H01L43/00

Abstract: A magnetoresistive effect device includes a magnetoresistive effect element first and second ports, a signal line, an inductor, and a direct current input terminal. The first port, the magnetoresistive effect element, and the second port are connected in series in this order via the signal line. The inductor is connected to one of the signal line between the magnetoresistive effect element and the first port and the signal line between the magnetoresistive effect element and the second port and is capable of being connected to ground. The direct-current input terminal is connected to the other of the above signal lines. A closed circuit including the magnetoresistive effect element, the signal line, the inductor, the ground, and direct-current input terminal is capable of being formed. The magnetoresistive effect element is arranged so that direct current flows in a direction from a magnetization fixed layer to a magnetization free layer.

公开(公告)号：US20250102713A1

公开(公告)日：2025-03-27

申请号：US18891926

申请日：2024-09-20

Applicant: TDK CORPORATION

Inventor： Tomohito MIZUNO ,  Hideaki Fukuzawa ,  Tetsuya Shibata ,  Tsuyoshi Komaki ,  Takeshi Nojiri

IPC: G02B5/08 ,  G02B1/00 ,  G02B26/10 ,  G02B27/01

Abstract: A metasurface reflector includes: a first metal layer and a second metal layer stacked in a first direction; and a dielectric layer provided between the first metal layer and the second metal layer in the first direction. The dielectric layer includes a main surface on which the second metal layer is provided. The metasurface reflector is divided into a plurality of unit regions arranged in a second direction along the main surface and in a third direction along the main surface and intersecting the second direction. The second metal layer includes metal units respectively provided in all or some of the plurality of unit regions. Lengths of metal units, which are arranged in the second direction and set for a same wavelength among the metal units, in the second direction are different from each other.

公开(公告)号：US12218161B2

公开(公告)日：2025-02-04

申请号：US17559135

申请日：2021-12-22

Applicant: TDK CORPORATION

Inventor： Hideaki Fukuzawa ,  Dai Matsuoka ,  Tomohito Mizuno ,  Tetsuya Shibata

IPC: H01L27/146 ,  H10B61/00 ,  H10N50/10 ,  H10N50/80 ,  G11C11/16

Abstract: An optical sensor includes a wavelength filter configured to transmit light in a specific wavelength range and a magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer. The light passing through the wavelength filter is applied to the magnetic element and the light applied to the magnetic element is detected.

公开(公告)号：US12124096B2

公开(公告)日：2024-10-22

申请号：US18411575

申请日：2024-01-12

Applicant: TDK CORPORATION

Inventor： Tetsuya Shibata ,  Hideaki Fukuzawa ,  Tomohito Mizuno ,  Masahiro Shinkai

IPC: G02B6/42 ,  G02B6/43

CPC classification number: G02B6/4296 ,  G02B6/4274 ,  G02B6/43

Abstract: This optical device includes at least one magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, a laser diode, and a waveguide, in which the waveguide includes at least one input waveguide optically connected to the laser diode and an output waveguide connected to the input waveguide, and at least some of light propagating in at least one of the input waveguide and the output waveguide is applied to the magnetic element.

公开(公告)号：US12080957B2

公开(公告)日：2024-09-03

申请号：US18102550

申请日：2023-01-27

Applicant: TDK Corporation

Inventor： Tetsuya Shibata ,  Naoki Sotoma

IPC: H01Q5/307 ,  H01Q9/04

CPC classification number: H01Q5/307 ,  H01Q9/0407

Abstract: Disclosed herein is a dual band patch antenna that includes a first feeding part, first and second radiation conductors, a first feeding conductor having one end connected to the first feeding part and other end connected to the first radiation conductor, a second feeding conductor having one end connected to the first feeding part and other end connected to the second radiation conductor, a first open stub having one end connected to the first feeding conductor and other end opened, and a second open stub having one end connected to the second feeding conductor and other end opened.

公开(公告)号：US11869989B2

公开(公告)日：2024-01-09

申请号：US17509730

申请日：2021-10-25

Applicant: TDK CORPORATION

Inventor： Tomohito Mizuno ,  Takekazu Yamane ,  Hideaki Fukuzawa ,  Tetsuya Shibata

IPC: H01L31/0224 ,  H01L27/146 ,  H04B10/114 ,  H04B10/69 ,  H04B10/50

CPC classification number: H01L31/022466 ,  H01L27/14643 ,  H04B10/1143 ,  H04B10/501 ,  H04B10/691

Abstract: An electrode structure includes: a metal film with an opening formed in a part of the metal film; and a transparent conductive film disposed in the opening, wherein the transparent conductive film is electronically connected to an element and overlaps with the element as viewed in a plan view in a thickness direction of the transparent conductive film.