Patents Assigned to TDK Corporation
  • Publication number: 20240068888
    Abstract: A detection device includes a base plate, a piezoelectric element disposed on the base plate with an insulating member therebetween and generating a pressing force corresponding to an electromotive force, an electrostatic capacitance sensor detecting an electrostatic capacitance of the base plate, a wiring member (first wiring member) electrically connected to the piezoelectric element, and a wiring member (second wiring member) electrically connected to the electrostatic capacitance sensor.
    Type: Application
    Filed: July 11, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventor: Takashi KATO
  • Publication number: 20240068897
    Abstract: There is provided a sensor member capable of suitably preventing a problem such as the intrusion of moisture or the like through an interface between an electrode and a protective film. A sensor member includes: a protected portion provided on one surface of a metal base and including a detection portion; a protective film including a first protective film portion having a first thickness and a second protective film portion having a second thickness thicker than the first thickness and formed at an opening peripheral edge of an opening leading to the protected portion, and covering at least a part of the protected portion from above; and an electrode portion including a first electrode portion disposed in the opening and connected to the protected portion, and a second electrode portion connected to the first electrode portion at an outer peripheral edge of the first electrode portion and formed on the second protective film portion.
    Type: Application
    Filed: August 23, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Masanori KOBAYASHI, Ken UNNO, Tetsuya SASAHARA, Tetsuo HATA
  • Publication number: 20240068846
    Abstract: A magnetic sensor includes a bridge circuit including a first arm and a second arm, a first substrate, and a second substrate. The first arm is provided on the first substrate. The second arm is provided on the second substrate. The first arm includes a first resistor and a second resistor connected in series. The second arm includes a third resistor and a fourth resistor connected in series. The second substrate is located at a position away from the first substrate so that a phase of a resistance of the second arm when a target magnetic field changes periodically is different from that of a resistance of the first arm when the target magnetic field change periodically.
    Type: Application
    Filed: August 9, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventor: Yongfu CAI
  • Publication number: 20240071660
    Abstract: A soft magnetic alloy powder comprises a component having a compositional formula ((Fe(1?(?+?))Co?Ni?)(1??)X1?)(1?(a+b+c+d+e))BaPbSicCdCre in atomic ratio. X1 comprises at least one selected from specific elements. Values of a, b, c, d, e, ?, ?, and ? of the compositional formula satisfy specific ranges. The soft magnetic alloy powder comprises soft magnetic alloy particles including soft magnetic alloy particles having a particle size of (0.95×D90) or more and (1.05×D90) or less. An average Wadell's circularity of the soft magnetic alloy particles having the particle size of (0.95×D90) or more and (1.05×D90) or less is 0.75 or more. A variance of Wadell's circularity of the soft magnetic alloy particles having the particle size of (0.95×D90) or more and (1.05×D90) or less is 0.035 or less.
    Type: Application
    Filed: August 30, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Akito HASEGAWA, Yoshiki KAJIURA, Masakazu HOSONO, Kazuhiro YOSHIDOME
  • Publication number: 20240071659
    Abstract: A metal magnetic powder includes: metal nanoparticles having an average particle size (D50) is 1 nm to 100 nm, and a main phase of hcp-Co; and an additive elements ? including at least one of Fe, Ni, and Cu.
    Type: Application
    Filed: August 25, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Isao KANADA, Hiroshi ITO, Kyohei TAKAHASHI
  • Publication number: 20240071655
    Abstract: A transient voltage protection device includes an element body formed with a cavity inside, a pair of internal electrodes, and a discharge assistance portion. The pair of internal electrodes are disposed in the element body and include edges. The edges include parts opposing each other in a first direction in the cavity. The discharge assistance portion is in contact with the parts of the edges. Each of the edges includes a first end exposed on an outer surface of the element body and a second end located opposite the first end and including a corner. The discharge assistance portion includes a pair of edges opposing each other in a second direction intersecting with the first direction and exposed to the cavity. The part included in each of the edges does not include the corner.
    Type: Application
    Filed: August 25, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Shunsuke TAKAHASHI, Masato HAYATSU, Sota HIRABA, Naoyoshi YOSHIDA
  • Publication number: 20240071662
    Abstract: The metal magnetic powder includes Co as a main component, and an average particle size (D50) of 1 nm to 100 nm. An X-ray diffraction chart of the metal magnetic powder has a first peak that appears in a range of a diffraction angle 2? of 41.6±0.3°, and a second peak that appears in a range of a diffraction angle 20? of 47.4±0.3°. When a full width at half maximum of the first peak is set as FW1, and a full width at half maximum of the second peak is set as FW2, a ratio (FW2/FW1) of FW2 to FW1 is 1 to 5.
    Type: Application
    Filed: August 25, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Kyohei TAKAHASHI, Hiroshi ITO, Isao KANADA
  • Publication number: 20240071663
    Abstract: A soft magnetic alloy powder comprises first particles to fifth particles, each having a particle size within a specific range. Among the first particles to the fifth particles, nth particles have an average particle size xn (?m), an average circularity yn, and a variance zn of circularity, where nth is any ordinal number from first to fifth. Points (xn, yn) (n=1 to 5) plotted in an xy plane define an approximate straight line having a slope “my” of ?0.0030 or more. Points (xn, zn) (n=1 to 5) plotted in an xz plane define an approximate straight line having a slope “mz” of 0.00050 or less.
    Type: Application
    Filed: August 30, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Masakazu HOSONO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Yoshiki KAJIURA
  • Publication number: 20240072239
    Abstract: A laminated body contains a first metal layer containing copper and a second metal layer containing nickel and directly laminated on the first metal layer. A full width at half maximum of an X-ray diffraction peak having the maximum intensity among at least one X-ray diffraction peak derived from a nickel-containing crystal in the second metal layer is 0.3° or more and 1.2° or less.
    Type: Application
    Filed: December 13, 2021
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Yuhei HORIKAWA, Makoto ENDO, Takuya KAKIUCHI, Miyuki YANAGIDA, Yuki NAITO, Takahiro TASHIRO
  • Publication number: 20240072754
    Abstract: In a multilayer filter, first and second resonant circuits are arranged in a direction crossing a stacking direction of a plurality of dielectric layers. An 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. The second resonant circuit includes an inductor conductor, a first capacitor conductor, and a second capacitor conductor. 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 dielectric layer has a dielectric constant lower than that of the first dielectric layer. The first and second capacitor conductors are provided in the first dielectric layer. At least a part of the inductor conductor is provided in the second dielectric layer.
    Type: Application
    Filed: August 28, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Masahiro TATEMATSU, Yuta ASHIDA, Shuhei SAWAGUCHI, Keigo SHIBUYA, Tomonori TERUI, Tetsuzo GOTO
  • Publication number: 20240068891
    Abstract: There is provided a sensor member with a small risk of damage. A sensor member includes: a membrane; a protective film covering a part of the membrane; and an electrode portion connected to the membrane. The electrode portion 5 covers at least a part of the protective film.
    Type: Application
    Filed: August 23, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Masanori KOBAYASHI, Ken UNNO, Tetsuya SASAHARA, Tetsuo HATA, Lucie OUEDRAOGO
  • Publication number: 20240071692
    Abstract: A high voltage feed-through capacitor includes an element body, a first electrode, a second electrode and a through-conductor. The element body includes a first main surface and a second main surface facing away from each other. A through-hole is formed in the element body and opens in the first main surface and the second main surface. The first electrode is disposed on the first main surface. The second electrode is disposed on the second main surface. The through-conductor is inserted through the through-hole and electrically connected to the first electrode. An opening area of the through-hole in the second main surface is larger than an opening area of the through-hole in the first main surface.
    Type: Application
    Filed: July 17, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Yuta KAMO, Hisashi TANAKA
  • Publication number: 20240074039
    Abstract: A transient voltage protection device includes an element body formed with a cavity inside, a pair of external electrodes on the element body, and a pair of internal electrodes in the element body. The pair of internal electrodes oppose each other. Each internal electrode is connected to a corresponding external electrode of the pair of external electrodes. The element body includes a first inner surface and a second inner surface. The first and second inner surfaces define the cavity and oppose each other. The pair of internal electrodes are exposed to the cavity and disposed on the first inner surface. In a cross section along a direction in which the first inner surface and the second inner surface oppose each other, the first inner surface includes a contour different from a contour included in the second inner surface.
    Type: Application
    Filed: July 20, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Naoyoshi YOSHIDA, Masato HAYATSU, Shunsuke TAKAHASHI, Sota HIRABA
  • Publication number: 20240071693
    Abstract: A high voltage capacitor includes a pair of capacitors; a common conductor, and a pair of individual conductors. Each of the pair of capacitors includes an element body having a columnar shape with a first direction as an axial direction, and including a first side surface and a second side surface facing away each other in a second direction orthogonal to the first direction, a first electrode disposed on the first side surface and electrically connected to a corresponding individual conductor of the pair of individual conductors; and a second electrode disposed on the second side surface and electrically connected to the common conductor. The pair of capacitors is disposed in such a way that the first electrodes face each other in the second direction. The common conductor surrounds the pair of capacitors and the pair of individual conductors when viewed from the first direction.
    Type: Application
    Filed: July 19, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Yuta KAMO, Hisashi TANAKA
  • Publication number: 20240074326
    Abstract: A magnetoresistance effect element includes a laminated body having a first ferromagnetic layer, a second ferromagnetic layer, and a nonmagnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer, a first wiring connected to the laminated body, a sidewall insulating layer configured to cover at least a part of a side surface of the laminated body, a first electrode connected to a side of the laminated body opposite to the first wiring, and a second electrode and a third electrode provided on both sides of the laminated body with the sidewall insulating layer sandwiched therebetween, sandwiching the laminated body, and connected to the first wiring.
    Type: Application
    Filed: March 12, 2021
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Yugo ISHITANI, Tomoyuki SASAKI
  • Publication number: 20240074325
    Abstract: A magnetic domain wall moving element includes a first ferromagnetic layer, non-magnetic layer, second ferromagnetic layer, first magnetization fixed part, second magnetization fixed part, first surface layer and second surface layer.
    Type: Application
    Filed: August 30, 2022
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Shogo YONEMURA, Tatsuo SHIBATA, Shogo YAMADA
  • Publication number: 20240074320
    Abstract: A piezoelectric element includes a piezoelectric body and first, second, third, and fourth electrode layers disposed in the piezoelectric body. Each of the first, second, third, and fourth electrode layers includes a pair of first electrodes and a pair of second electrodes. The first and second electrodes included in the first electrode layer oppose the second and first electrodes included in the second electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the second electrode layer oppose the first and second electrodes included in the third electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the third electrode layer oppose the second and first electrodes included in the fourth electrode layer, respectively, with a part of the piezoelectric body.
    Type: Application
    Filed: August 23, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Shuto ONO, Satoshi SASAKI, Yasuyuki SATOH, Keiji OGUCHI
  • Publication number: 20240074323
    Abstract: A magnetic array includes: a plurality of magnetoresistance effect elements; and a pulse application device which applies a pulse to each of the plurality of magnetoresistance effect elements, wherein each of the plurality of magnetoresistance effect elements includes domain wall motion layer, ferromagnetic layer, and non-magnetic layer sandwiched between the domain wall motion layer and the ferromagnetic layer, wherein the pulse application device is configured to apply an initialization pulse and an operation pulse to each of the plurality of magnetoresistance effect elements, wherein the initialization pulse has a first pulse that is applied a plurality of times to spread a distribution of resistance values of the plurality of magnetoresistance effect elements from an initial distribution, and wherein a voltage of each first pulse is smaller than that of the operation pulse or each pulse length of the first pulse is shorter than that of the operation pulse.
    Type: Application
    Filed: January 12, 2021
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Shogo YAMADA, Tatsuo SHIBATA
  • Publication number: 20240072676
    Abstract: A power conversion apparatus includes: a first power terminal; a first arm including a first switching device between a first coupling terminal and a first node, a second switching device between the first node and a second node, and a third switching device between the second node and a second coupling terminal; a second arm including a fourth switching device between the first coupling terminal and a third node, a fifth switching device between the third node and a fourth node, and a sixth switching device between the fourth node and the second coupling terminal; a first inductor between the second node and a fifth node; a second inductor between the fourth and fifth nodes: a first capacitor between the fifth node and the second coupling terminal; a first transformer including a first winding and a second winding; a rectifying circuit; a second power terminal; and a control circuit.
    Type: Application
    Filed: March 30, 2021
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventor: Naoyuki ISHIBASHI
  • Patent number: 11915876
    Abstract: 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: Grant
    Filed: July 6, 2022
    Date of Patent: February 27, 2024
    Assignee: TDK CORPORATION
    Inventors: Toshihiro Iguchi, Norihisa Ando, Kenya Tamaki, Hisashi Kobayashi