Patents Assigned to TDK Corporation
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Patent number: 11915876Abstract: A ceramic electronic device comprises an element body including a ceramic layer and an internal electrode layer, and an external electrode electrically connected to at least one end of the internal electrode layer. The element body includes an interface part at least at a part of a boundary between the external electrode and the ceramic layer. The interface part includes an oxide containing aluminium and an oxide containing boron.Type: GrantFiled: July 6, 2022Date of Patent: February 27, 2024Assignee: TDK CORPORATIONInventors: Toshihiro Iguchi, Norihisa Ando, Kenya Tamaki, Hisashi Kobayashi
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Publication number: 20240062777Abstract: A magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer positioned between the first ferromagnetic layer and the second ferromagnetic layer, and at least one of the first ferromagnetic layer and the second ferromagnetic layer is a Heusler alloy represented by the following General Formula (1): Co2Fe?X???(1) (in Formula (1), X represents one or more elements selected from the group consisting of Mn, Cr, Si, Al, Ga and Ge, and ? and ? represent numbers that satisfy 2.3??+?, ?<?, and 0.5??<1.9).Type: ApplicationFiled: August 31, 2023Publication date: February 22, 2024Applicant: TDK CORPORATIONInventors: Kazuumi INUBUSHI, Katsuyuki NAKADA, Tetsuya UEMURA
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Patent number: 11906602Abstract: A magnetic sensor includes a magnetic field converter, a magnetic field detector, and a plurality of shields aligned in a Y direction. The magnetic field converter includes a plurality of yokes. Each yoke has a shape elongated in the Y direction, and is configured to receive an input magnetic field component in a direction parallel to a Z direction and to output an output magnetic field component in a direction parallel to an X direction. The magnetic field detector includes a plurality of trains of elements. Each train of elements includes a plurality of MR elements that are aligned in the Y direction along one yoke and connected in series. Each shield has such a shape that its maximum dimension in the Y direction is smaller than its maximum dimension in the X direction.Type: GrantFiled: February 22, 2023Date of Patent: February 20, 2024Assignee: TDK CORPORATIONInventor: Keisuke Uchida
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Patent number: 11908955Abstract: A Schottky barrier diode 1 includes: a semiconductor substrate made of gallium oxide; a drift layer made of gallium oxide; an anode electrode brought into Schottky contact with an upper surface of the drift layer; and a cathode electrode brought into ohmic contact with a lower surface of the semiconductor substrate. A ring-shaped outer peripheral trench is formed in the upper surface of the drift layer, and the anode electrode is partly filled in the outer peripheral trench. A ring-shaped back surface trench is formed in the lower surface of the semiconductor substrate such that the bottom thereof reaches the drift layer. This limits a current path to the area surrounded by the back surface trench, thereby mitigating electric field concentration in the vicinity of the bottom of the outer peripheral trench.Type: GrantFiled: February 4, 2021Date of Patent: February 20, 2024Assignee: TDK CORPORATIONInventors: Jun Arima, Minoru Fujita, Jun Hirabayashi
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Patent number: 11899079Abstract: An object of the present invention is to provide a magnetic sensor capable of, while suppressing an increase in manufacturing cost, controlling the gap size so as to make the gap between the element formation surface of the sensor chip and the magnetism collecting member as small as possible and to make variations among products fall within a certain range and a manufacturing method for such a magnetic sensor. A magnetic sensor includes a sensor chip 20a mounted on a substrate 2 such that the element formation surface 20a is perpendicular to the substrate 2 and a magnetism collecting member 30 mounted on the substrate 2 such that the surface 31 faces the substrate 2 and the surface 32 faces the element formation surface 20a. The surfaces 31 and 32 of the magnetism collecting member 30 have flatness higher than that of the other surfaces thereof.Type: GrantFiled: February 10, 2020Date of Patent: February 13, 2024Assignee: TDK CORPORATIONInventor: Makoto Kameno
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Patent number: 11898886Abstract: A position detection device includes a magnet that generates a magnetic field to be detected, and a magnetic sensor. The magnetic sensor detects the magnetic field to be detected and generates a detection value corresponding to the position of the magnet. The magnetic field to be detected has a first direction that changes within a first plane, at a reference position in the first plane. The magnetic sensor includes four MR elements. Each of the MR elements includes a first magnetic layer having first magnetization that can change in direction within a second plane corresponding to the each of the MR elements. The first plane and the second plane intersect at a dihedral angle ? other than 90°. A detection value depends on the direction of the first magnetization.Type: GrantFiled: July 15, 2022Date of Patent: February 13, 2024Assignee: TDK CORPORATIONInventors: Keisuke Uchida, Yongfu Cai
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Patent number: 11898979Abstract: A gas sensor with improved sensitivity. The gas sensor comprises an active sensor unit, a reference sensor unit and a temperature control circuit. The active sensor unit has an active detector. The reference sensor unit has a reference detector. The temperature control circuit is provided and configured to keep a detector at a predetermined temperature.Type: GrantFiled: September 24, 2020Date of Patent: February 13, 2024Assignee: TDK CorporationInventor: Matthias König
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Patent number: 11898913Abstract: An electromagnetic wave sensor 1 has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each electromagnetic wave absorber at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each electromagnetic wave absorber is away from the second extending portions with the connection portions as fulcrums.Type: GrantFiled: August 17, 2022Date of Patent: February 13, 2024Assignee: TDK CORPORATIONInventors: Shinji Hara, Naoki Ohta, Kazuya Maekawa, Susumu Aoki, Maiko Shirokawa
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Patent number: 11898884Abstract: A stroke sensor that allows adjustment of the magnetic field distribution without changing the positions of the magnets is provided. Stroke sensor 1 has magnets 2A, 2B, and sensor 3A that detects a magnetic field that is generated by magnets 2A, 2B. Magnets 2A, 2B are movable relative to sensor 3A in first direction X. Magnet 2A has surface 5A that faces sensor 3A in second direction Z, magnet 2B has surface 5B that faces sensor 3A in second direction Z, and surface 5A and surface 5B have different polarities. A position in first direction X at which magnetic field intensity in second direction Z is zero is positioned between reference axis RA and magnet 2B. Reference axis RA is parallel to second direction Z and passes through middle point MP of minimum section S that includes magnets 2A, 2B in first direction X.Type: GrantFiled: July 28, 2022Date of Patent: February 13, 2024Assignee: TDK CorporationInventors: Takahiro Moriya, Toshihiko Oyama, Keiji Suzuki, Toshio Ishikawara
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Patent number: 11898980Abstract: A gas sensor includes a feedback circuit part and a sensor circuit part. The feedback circuit part includes a reference resistor and a first temperature sensing element which are connected in series, a first heater resistor that heats the first temperature sensing element, and a first amplifier circuit that controls the amount of current to flow in the first heater resistor based on an internal potential. The sensor circuit part includes a second temperature sensing element and a second heater resistor that heats the second temperature sensing element. A current according to the output of the first amplifier circuit flows in the second heater resistor. With this configuration, it is possible to automatically change the amount of current to flow in the second heater resistor according to ambient temperature without digital processing to thereby heat the second temperature sensing element to a constant temperature.Type: GrantFiled: September 24, 2019Date of Patent: February 13, 2024Assignee: TDK CorporationInventor: Kei Tanabe
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Patent number: 11897348Abstract: A power transmission device that wirelessly transmits power to a vehicle, the power transmission device including an information emitter that, in a case in which the position of the vehicle acquired by the information acquirer is located in a power transmission range of the power transmission coil and, also, the instruction receiver receives the instruction about power transmission, emits a first type of information that indicates a presence of the foreign object when the detector detects the foreign object, and in a case in which the instruction receiver does not receive the instruction about power transmission even though the position of the vehicle acquired by the position information acquirer is located in the power transmission range of the power transmission coil, does not emit the information that indicates the presence of the foreign object.Type: GrantFiled: July 1, 2021Date of Patent: February 13, 2024Assignee: TDK CORPORATIONInventor: Akira Gotani
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Patent number: 11903327Abstract: This spin element includes: a current-carrying part that extends in a first direction; and an element part that is laminated on one surface of the current-carrying part, wherein the current-carrying part includes a first wiring and a second wiring in order from a side of the element part, and wherein both of the first wiring and the second wiring are metals and temperature dependence of resistivity of the first wiring is larger than temperature dependence of resistivity of the second wiring in at least a temperature range of ?40° C. to 100° C.Type: GrantFiled: November 9, 2022Date of Patent: February 13, 2024Assignee: TDK CORPORATIONInventor: Tomoyuki Sasaki
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Publication number: 20240047136Abstract: A multilayer electronic device includes an element body and a pair of external electrodes. The element body includes an interior region in which inner dielectric layers and internal electrode layers are alternately laminated and an exterior region located outside the interior region in its lamination direction. The pair of external electrodes exists on surfaces of the element body. Main-phase particles in the inner dielectric layers and outer dielectric layers of the exterior region include a main component having a perovskite crystal structure represented by a general formula of ABO3. r1<r2<r1×4.0 is satisfied, in which r1 is an average particle size of the main-phase particles constituting the inner dielectric layers, and r2 is an average particle size of the main-phase particles constituting the outer dielectric layers.Type: ApplicationFiled: July 24, 2023Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Taku MURAKAMI, Nobuto MORIGASAKI, Takuma ARIIZUMI, Yoshitaka NAGASHIMA, Masato KIMURA
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Publication number: 20240047696Abstract: A laminated resin film includes: a resin layer; and a Cu film having on one surface or both surfaces of the resin layer, in which in the Cu film, an orientation index of a plane is 0.15 or more according to a Lotgering method, a half-width of an X-ray diffraction peak obtained by X-ray diffraction measurement of the plane is 0.3° or less, and Expression (1) is satisfied. y>3.75x?0.675 ??Expression (1) (in Expression (1), Y is the orientation index of the plane in the Cu film according to the Lotgering method, and x is the half-width of the X-ray diffraction peak obtained by the X-ray diffraction measurement of the plane in the Cu film.Type: ApplicationFiled: February 18, 2021Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Makoto ENDO, Mingyu CHEN, Yoshihiro KANBAYASHI, Takasi SATOU, Natsumi KOZAI, Yoshihiko TANABE, Syuji TSUKAMOTO, Miyuki YANAGIDA
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Publication number: 20240047109Abstract: Provided is a magnetic core in which metal magnetic particles occupy an area of 75% to 90% on a cross-section. The metal magnetic particles include first large particles having a crystalline metal material and having a Heywood diameter of 3 ?m or more on the cross-section of the magnetic core, and second large particles having a nanocrystal structure or an amorphous structure and having a Heywood diameter of 3 ?m or more, and an insulation coating of the first large particles is thicker than an insulation coating of the second large particles.Type: ApplicationFiled: July 25, 2023Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Kazuhiro YOSHIDOME, Kensuke ARA
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Publication number: 20240048112Abstract: In a multilayer filter, first to fourth resonant circuits are connected to an input/output portion. The input/output portion includes an input/output port group including an unbalanced port and a pair of balanced ports or an input/output port group including two pairs of balanced ports. Each of the first to fourth resonant circuits includes an inductor conductor and first and second capacitor conductors. The inductor conductor includes first and second ends. The first capacitor conductor is connected to the first end. The second capacitor conductor is connected to the second end. The second and third resonant circuits are magnetically coupled to each other. The second and third resonant circuits are arranged between the first resonant circuit and the fourth resonant circuit in a first direction. Each of first and second electrodes of a jump capacitor conductor is connected to the inductor conductors of the first and fourth resonant circuits.Type: ApplicationFiled: July 28, 2023Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Yuta ASHIDA, Shuhei SAWAGUCHI, Masahiro TATEMATSU, Keigo SHIBUYA, Tomonori TERUI, Tetsuzo GOTO
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Publication number: 20240047694Abstract: A laminated body contains a first metal layer containing copper and a second metal layer containing nickel and laminated directly on the first metal layer. A first surface of the second metal layer is a surface in contact with the first metal layer. A second surface of the second metal layer is a reverse surface of the first surface. A thickness direction of the second metal layer is a direction approximately perpendicular to the first surface and oriented from the first surface toward the second surface. A unit of a content of nickel in the second metal layer is % by mass. The content of nickel in the second metal layer increases along the thickness direction.Type: ApplicationFiled: December 16, 2021Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Yuhei HORIKAWA, Makoto ENDO, Takuya KAKIUCHI, Miyuki YANAGIDA, Yuki NAITO, Takahiro TASHIRO
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Publication number: 20240047695Abstract: A laminated body contains a first metal layer containing copper; and a second metal layer containing nickel and laminated directly on the first metal layer. A first surface of the second metal layer is a surface in contact with the first metal layer. A second surface of the second metal layer is a reverse face of the first surface. A thickness direction of the second metal layer is a direction approximately perpendicular to the first surface and oriented from the first surface toward the second surface. A unit of a content of nickel in the second metal layer is % by mass. The content of nickel in the second metal layer 2 decreases along the thickness direction D.Type: ApplicationFiled: December 16, 2021Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Yuhei HORIKAWA, Makoto ENDO, Takuya KAKIUCHI, Miyuki YANAGIDA, Yuki NAITO, Takahiro TASHIRO
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Publication number: 20240047103Abstract: An R-T-B-based permanent magnet including: R (rare earth element); T (Fe and Co); B (boron); and one or more selected from Al, Cu, Ga, and Zr. R includes Ce. The total R content is 31.3-34.0 mass % (inclusive), the Co content is 1.85-3.00 mass % (inclusive), the B content is 0.80-0.90 mass % (inclusive), the Al content is 0.03-0.90 mass % (inclusive), the Cu content is 0-0.25 mass % (inclusive), the Ga content is 0-0.10 mass % (inclusive), the Zr content is 0-0.60 mass % (inclusive), and the Fe content is substantially the remainder. The Ce content relative to R is 15-25 mass % (inclusive).Type: ApplicationFiled: November 10, 2021Publication date: February 8, 2024Applicant: TDK CORPORATIONInventors: Hikaru KUDO, Atsushi KODA, Takahiro SUWA
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Patent number: 11892478Abstract: A magnetic sensor device includes a first detection circuit that generates a first detection signal, a coil through which a feedback current is passed to generate a cancellation magnetic field, a second detection circuit that generates a second detection signal having a correspondence with a value of the feedback current, and a control circuit that controls the feedback current. In a closed-loop operation, the control circuit controls the feedback current so that the first detection signal has a constant value. In an open-loop operation, the control circuit maintains the feedback current at a constant value.Type: GrantFiled: February 17, 2023Date of Patent: February 6, 2024Assignee: TDK CORPORATIONInventors: Yuta Saito, Hiraku Hirabayashi