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公开(公告)号：US20240219642A1
公开(公告)日：2024-07-04
申请号：US18539873
申请日：2023-12-14
Applicant: TDK CORPORATION
Inventor： Yasuhiro TAKAGI , Hiroki Hara , Atsushi Shimura , Hajime Utsunomiya , Jiro Yoshinari
IPC: G02B6/293
CPC classification number: G02B6/29344
Abstract: An optical coupler includes: light input ports on a first side surface; monitoring light output ports on a second side surface; one light output port on a third side surface; and multimode-interference-type optical coupling parts, a first multimode-interference coupling part is connected to a first light-input-side waveguide on the input side, and to a first monitoring-light-output-side waveguide and a first connecting waveguide on the output side, the second multimode-interference coupling part is connected to a second light-input-side waveguide and the first connecting waveguide on the input side, and to a second monitoring-light-output-side waveguide and a second connecting waveguide on the output side, and the third multimode-interference coupling part is connected to a third light-input-side waveguide and the second connecting waveguide on the input side, and connected to a third monitoring-light-output-side waveguide and a light-output-port-connected waveguide on the output side, and the monitoring-light-output-side waveguides are free of an intersection.
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公开(公告)号：US10074688B2
公开(公告)日：2018-09-11
申请号：US15662697
申请日：2017-07-28
Applicant: TDK CORPORATION
Inventor： Tetsuya Shibata , Tsuyoshi Suzuki , Junichiro Urabe , Takekazu Yamane , Atsushi Shimura
CPC classification number: H01L27/22 , G11B5/3903 , G11B5/3945 , H01L43/02 , H01L43/08 , H03H1/0007 , H03H2/00 , H03H7/0153
Abstract: A magnetoresistive effect device includes a first magnetoresistive effect element, a second magnetoresistive effect element, a first port, a second port, a signal line, and a direct-current input terminal. The first port, the first magnetoresistive effect element, and the second port are connected in series to each other in this order via the signal line. The second magnetoresistive effect element is connected to the signal line in parallel with the second port. The first magnetoresistive effect element and the second magnetoresistive effect element are formed so that the relationship between the direction of direct current that is input from the direct-current input terminal and that flows through the first magnetoresistive effect element and the order of arrangement of a magnetization fixed layer, a spacer layer, and a magnetization free layer in the first magnetoresistive effect element is opposite to the above relationship in the second magnetoresistive effect element.
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公开(公告)号：US09906199B2
公开(公告)日：2018-02-27
申请号：US15066350
申请日：2016-03-10
Applicant: TDK CORPORATION
Inventor： Tetsuya Shibata , Junichiro Urabe , Atsushi Shimura , Takekazu Yamane
CPC classification number: H03H1/0007 , H01L43/00 , H01L43/08 , H03H2/00 , H03H2001/0057 , H03H2001/0085
Abstract: A magnetoresistive effect device includes a magnetoresistive effect element including a magnetization fixed layer, a spacer layer, and a magnetization free layer; a first port; a second port; a signal line; an impedance element; 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 impedance element is connected to ground and to the signal line between the magnetoresistive effect element and the first port or the second port. The direct-current input terminal is connected to the signal line at the opposite side to the impedance element with the magnetoresistive effect element in between the direct-current input terminal and the impedance element. A closed circuit including the magnetoresistive effect element, the signal line, the impedance element, the ground, and the direct-current input terminal is to be formed.
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公开(公告)号：US20250138348A1
公开(公告)日：2025-05-01
申请号：US18882916
申请日：2024-09-12
Applicant: TDK Corporation
Inventor： Yasuhiro TAKAGI , Hiroki Hara , Atsushi Shimura , Jiro Yoshinari
Abstract: In a first region of a first conversion portion, a length of an upper tapered portion in a third direction continuously increases from a first length at a first end to a second length toward an intermediate position, and a length of a lower tapered portion in the third direction continuously increases from the first length at the first end to a third length, which is longer than the second length, toward the intermediate position. In a second region of the first conversion portion, a length of the upper tapered portion in the third direction continuously increases from the second length at the intermediate position to a fourth length, which is shorter than the third length, toward a second end, and a length of the lower tapered portion in the third direction continuously decreases from the third length at the intermediate position to the fourth length toward the second end.
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公开(公告)号：US12282191B2
公开(公告)日：2025-04-22
申请号：US17924522
申请日：2021-08-19
Applicant: TDK CORPORATION
Inventor： Hiroki Hara , Takashi Kikukawa , Atsushi Shimura
Abstract: An optical circuit element capable of preventing stray light propagated through a part including a substrate of the optical circuit element from being emitted to the outside is provided. The optical circuit element has a substrate, an optical waveguide layer that is formed on one surface of the substrate, and a protective layer that is overlaid on the optical waveguide layer. The optical waveguide layer has an optical waveguide configured for light to be propagated therethrough. A groove portion, which reaches to a position deeper than the one surface from a surface of the protective layer toward the substrate, is formed. The optical circuit element further includes a light absorption layer that covers at least a bottom surface and a side surface of the groove portion.
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Patent Agency Ranking
公开(公告)号：US10957962B2
公开(公告)日：2021-03-23
申请号：US16340471
申请日：2017-10-23
Applicant: TDK CORPORATION
Inventor： Takekazu Yamane , Tetsuya Shibata , Tsuyoshi Suzuki , Junichiro Urabe , Atsushi Shimura
Abstract: A magnetoresistive effect device includes an input port, an input-side signal line, an MR unit including a magnetoresistive effect element and a magnetic-field generating signal line, and an output unit including a magnetoresistive effect element, an output-side signal line, and an output port. The magnetoresistive effect device further includes a DC application terminal. The magnetoresistive effect element is connected to the output port via the output-side signal line in the output unit. The input-side signal line is arranged so that a high frequency magnetic field generated from the input-side signal line is applied to the magnetoresistive effect element in the MR unit. In the MR unit, the magnetoresistive effect element is connected to the magnetic-field generating signal line. The magnetic-field generating signal line is arranged so that a high-frequency magnetic field generated from magnetic-field generating signal line is applied to the magnetoresistive effect element in the output unit.
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公开(公告)号：US10608309B2
公开(公告)日：2020-03-31
申请号：US15962587
申请日：2018-04-25
Applicant: TDK CORPORATION
Inventor： Takekazu Yamane , Junichiro Urabe , Tsuyoshi Suzuki , Atsushi Shimura
Abstract: A magnetoresistance effect device includes a first port, a second port, a magnetoresistance effect element, a first signal line that is connected to the first port and applies a high-frequency magnetic field to the magnetoresistance effect element, a second signal line that connects the second port to the magnetoresistance effect element, and a direct current application terminal that is connected to a power source configured to apply a direct current or a direct voltage in a lamination direction of the magnetoresistance effect element. The first signal line includes a plurality of high-frequency magnetic field application areas capable of applying a high-frequency magnetic field to the magnetoresistance effect element, and the plurality of high-frequency magnetic field application areas in the first signal line are disposed at positions at which high-frequency magnetic fields generated in the high-frequency magnetic field application areas reinforce each other in the magnetoresistance effect element.
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公开(公告)号：US10381997B2
公开(公告)日：2019-08-13
申请号：US15870243
申请日：2018-01-12
Applicant: TDK CORPORATION
Inventor： Tetsuya Shibata , Junichiro Urabe , Atsushi Shimura , Takekazu Yamane
Abstract: A high-frequency filter includes at least one magnetoresistive effect element; a first port through which a high-frequency signal is input; a second port through which a high-frequency signal is output; and a signal line.
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公开(公告)号：US09948267B2
公开(公告)日：2018-04-17
申请号：US15439640
申请日：2017-02-22
Applicant: TDK CORPORATION
Inventor： Takekazu Yamane , Tetsuya Shibata , Junichiro Urabe , Atsushi Shimura
Abstract: A magnetoresistive effect device includes at least one magnetoresistive effect element including a magnetization fixed layer, a spacer layer, and a magnetization free layer, a first port, a second port, a first signal line which is connected to the first port and through which high-frequency current corresponding to a high-frequency signal input into the first port flows, a second signal line, and a direct-current input terminal. The magnetoresistive effect element is arranged so that a high-frequency magnetic field occurring from the first signal line is applied to the magnetization free layer. The magnetoresistive effect element is connected to the second port via the second signal line. The direct-current input terminal is connected to the magnetoresistive effect element.
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公开(公告)号：US12292627B2
公开(公告)日：2025-05-06
申请号：US17707675
申请日：2022-03-29
Applicant: TDK CORPORATION
Inventor： Hiroshi Take , Kenji Nagase , Anthony Reymund Melad Binarao , Cheng Bu Heng , Atsushi Shimura
Abstract: The optical device includes a substrate and an optical waveguide formed on the substrate, a protrusion portion is formed on the substrate adjacent to the optical waveguide. Accordingly, an optical device which can achieve further suppression of the light propagation loss and higher reliability is provided.
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