Patents Assigned to TDK Corporation
  • Publication number: 20190279796
    Abstract: Soft magnetic alloy powder includes plurality of soft magnetic alloy particles of soft magnetic alloy represented by composition formula (Fe(1?(?+?))X1?X2?)(1?(a+b+c++e+f+g))MaBbPcSidCeSfTig, wherein X1 represents Co and/or Ni; X2 represents at least one selected from group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from group consisting of Nb, Hf, Zr, Ta, Mo, W, and V; 0.020?a?0.14, 0.020<b?0.20, 0<c?0.15, 0?d?0.060, 0?e?0.040, 0?f?0.010, 0?g?0.0010, ??0, ??0, and 0??+??0.50 are satisfied, wherein at least one of f and g is more than 0; and wherein soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance; and surface of each of the soft magnetic alloy particles is covered with a coating portion including a compound of at least one element selected from group consisting of P, Si, Bi, and Zn.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Masakazu HOSONO, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Isao NAKAHATA, Akito HASEGAWA, Hajime AMANO
  • Publication number: 20190279801
    Abstract: A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the second coating part includes oxides of Fe as a main component, and the third coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIDOME, Hiroyuki MATSUMOTO, Kenji HORINO, Satoko MORI, Takuma NAKANO, Seigo TOKORO, Shota OTSUKA, Toru UJIIE, Kentaro MORI
  • Publication number: 20190280667
    Abstract: A multilayer LC filter array includes an element body of a rectangular parallelepiped shape, a first filter including a first inductor and a first capacitor that are disposed in the element body, a second filter including a second inductor and a second capacitor that are disposed in the element body, a first input terminal electrode and a first output terminal electrode that are connected to the first inductor, a second input terminal electrode and a second output terminal electrode that are connected to the second inductor, and a ground terminal electrode that is connected to the first capacitor and the second capacitor. The element body includes first and second principal surfaces opposing each other. The ground terminal electrode is disposed at a center of the first principal surface.
    Type: Application
    Filed: August 21, 2017
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Akihiko OIDE, Naoki UCHIDA, Yoji TOZAWA, Makoto YOSHINO, Seiichi NAKAGAWA, Shinichi SATO, Hiroshi ONO, Takashi ENDO
  • Publication number: 20190279818
    Abstract: A composite structure including a conductor region that is configured from a first oxide, and an insulator region that is configured from a second oxide and that surrounds the conductor region, wherein the first oxide and the second oxide are in hetero structure with each other. A powder and a fired body each having such a composite structure are also preferable.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Shirou OOTSUKI, Masahito FURUKAWA, Satoshi WADA, Shintaro UENO, Yuya HATTORI
  • Publication number: 20190279823
    Abstract: Provided is a manufacturing method of a thin film capacitor comprising a capacitance portion in which at least one dielectric layer is sandwiched between a pair of electrode layers included in a plurality of electrode layers, the manufacturing method including a lamination process of alternately laminating the plurality of electrode layers and a dielectric film and forming a laminated body which will be the capacitance portion, a first etching process of forming an opening extending in a laminating direction with respect to the laminated body and exposing the dielectric film laminated directly on one of the plurality of electrode layers on a bottom surface of the opening, and a second etching process of exposing the one electrode layer at the bottom surface of the opening. In the second etching process, an etching rate of the one electrode layer is lower than an etching rate of the dielectric film.
    Type: Application
    Filed: March 6, 2019
    Publication date: September 12, 2019
    Applicant: TDK Corporation
    Inventors: Michihiro KUMAGAE, Kazuhiro YOSHIKAWA, Kenichi YOSHIDA, Junki NAKAMOTO, Norihiko MATSUZAKA
  • Publication number: 20190279808
    Abstract: A surface mounting coil device includes a bobbin including a hollow tube-shaped hollow tube portion and a terminal block portion connected to the hollow tube portion and provided with a terminal installed on a mounting substrate during mounting, a wire member including a winding portion wound around the hollow tube portion, both ends of the wire member being electrically connected to the terminal, a core including a middle leg portion passing through the hollow tube portion and attached to the bobbin, and a shield member including a shielding portion positioned in an outer diameter direction of the winding portion, an engagement portion engaged so as to be relatively movable along a mounting direction with respect to the bobbin, and an installation portion connected directly or via the shielding portion with respect to the engagement portion and installed on the mounting substrate during mounting.
    Type: Application
    Filed: March 1, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventor: Masatoshi YASUDA
  • Publication number: 20190280327
    Abstract: An all-solid lithium ion secondary battery has a pair of electrode layers and a solid electrolyte layer between the pair of electrode layers. In the all-solid lithium ion secondary battery, at least one electrode of the pair of electrodes has an active material layer and an intermediate layer on the surface of the active material layer on the side of the solid electrolyte layer, and each of the solid electrolyte layer, the intermediate layer, and the active material layer includes a compound containing Li and two or more shared types of metal elements other than Li, the two or more shared types of metal elements in the solid electrolyte layer, the intermediate layer, and the active material layer are identical between the solid electrolyte layer, the intermediate layer, and the active material layer.
    Type: Application
    Filed: September 25, 2017
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Hiroshi SATO, Masahiro OISHI, Takeo TSUKADA, Gakuho ISOMICHI, Tetsuya UENO
  • Publication number: 20190279802
    Abstract: A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicant: TDK Corporation
    Inventors: Kazuhiro YOSHIDOME, Hiroyuki Matsumoto, Kenji Horino, Satoko Mori, Takuma Nakano, Seigo Tokoro, Shota Otsuka, Toru Ujiie, Kentaro Mori
  • Publication number: 20190279794
    Abstract: A rare earth permanent magnet that is high in residual magnetization and coercivity is obtained and includes R and T. A main phase of crystal grains having an Nd5Fe17 type crystal structure is included. In an X-ray diffraction profile drawn by performing an XRD measurement for a rare earth permanent magnet, peaks of detected intensity are present in specific ranges. In which the detected intensity of the peak with the highest detected intensity in the range of 41.60°<2?(°)<42.80° is set as ?, the detected intensity of the peak with the highest detected intensity in the range of 34.38°<2?(°)<34.64° is set as ?, and the detected intensity of the peak with the highest detected intensity in the range of 38.70°<2?(°)<41.20° is set as ?, 0.38<?/?<0.70 and 0.45<?/?<0.70 are established. The peak with the highest detected intensity in the range of 34.38°<2?(°)<34.64° is a peak derived from the Nd5Fe17 type crystal structure.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Masashi ITO, Eiichiro FUKUCHI
  • Publication number: 20190280295
    Abstract: A positive electrode includes a positive electrode current collector, and a positive electrode active material layer that is provided on the positive electrode current collector and that includes a positive electrode active material, a conductive auxiliary agent, and a binder. A surface of the positive electrode active material layer has a reflectance Rc in a range of 2.0?Rc?12.0% at a wavelength of 550 nm. A lithium ion secondary battery includes: the positive electrode; a negative electrode including a negative electrode current collector and a negative electrode active material layer that is provided on the negative electrode current collector and that includes a negative electrode active material; a separator; and a nonaqueous electrolyte solution. A surface of the negative electrode active material layer has a reflectance Ra in a range of 7.5?Ra?16.0% at a wavelength of 550 nm.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Keitaro OTSUKI, Tetsu SATO, Masahiro SAEGUSA
  • Publication number: 20190279797
    Abstract: Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Takuma NAKANO, Kazuhiro YOSHIDOME, Hiroyuki MATSUMOTO, Satoko MORI, Seigo TOKORO, Kenji HORINO
  • Publication number: 20190279799
    Abstract: A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe(1?(?+?))X1?X2?)(1?(a+b+c+d+e))MaBbPcSidCe, wherein X represents Co and/or Ni; X2 represents at least one selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from the group consisting of Nb, Hf, Zr, Zr, Ta, Mo, W, and V; 0.020?a?0.14, 0.020<b?0.20, 0<c?0.15, 0?d?0.060, 0?e?0.040, ??0, ??0, and 0??+??0.50 are satisfied, and wherein the soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance; and the surface of each of the soft magnetic alloy particles is covered with a coating portion including a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicant: TDK CORPORATION
    Inventors: Masakazu HOSONO, Kenji HORINO, Hiroyuki MATSUMOTO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Isao NAKAHATA
  • Publication number: 20190280568
    Abstract: A magnet structure is a magnet structure for a TMR element which is an MR element. The magnet structure includes a bonded magnet compact that has a first main surface facing the TMR element, and a second main surface on a side opposite to the first main surface; and a tubular member that supports the bonded magnet compact. The bonded magnet compact has a gate portion which is provided on the second main surface and includes a gate mark formed by performing injection molding. The gate portion is provided at a position overlapping a center on the second main surface when seen from the second main surface side.
    Type: Application
    Filed: November 9, 2018
    Publication date: September 12, 2019
    Applicant: TDK Corporation
    Inventors: Naoki MORI, Yoshiaki OKADA
  • Patent number: 10409029
    Abstract: A lens driving device includes a base member, a movable element movable with respect to the base member, a piezoelectric actuator configured to move the movable element, a base-member-side urging part, and a movable-element-side urging part. The base-member-side urging part urges the movable element toward the base member side. The movable-element-side urging part urges the piezoelectric actuator toward the movable element side.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: September 10, 2019
    Assignee: TDK CORPORATION
    Inventors: Masahiro Hosokawa, Naoki Yusa
  • Patent number: 10412486
    Abstract: The electronic circuit having an input stage for pre-amplifying an electrical input signal of the electronic circuit provided by a transducer. The electronic circuit has an output stage for providing a microphone output signal by processing an output signal of the input stage. The electronic circuit has an adjustable output load arranged and configured for setting a current draw of the output stage. Additionally, the electronic circuit has a measurement circuit configured to capture the output signal of the input stage and an automatic control circuit configured to adjust the adjustable output load dependent on the captured output signal of the input stage.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: September 10, 2019
    Assignee: TDK Corporation
    Inventor: Gino Rocca
  • Patent number: 10409085
    Abstract: An X-axis movable object holding portion to hold an X-axis movable object is provided at a position facing an X-axis actuator in a base member. A Y-axis movable object holding portion to hold a Y-axis movable object is provided at a position facing a Y-axis actuator in the X-axis movable object. An X-axis stopper mechanism for restricting a movement range of the X-axis movable object is provided in the base member. A Y-axis stopper mechanism for restricting a movement range of the Y-axis movable object is provided in the X-axis movable object.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: September 10, 2019
    Assignee: TDK CORPORATION
    Inventors: Masahiro Hosokawa, Takuto Horii, Naoki Yusa
  • Patent number: 10410777
    Abstract: An R-T-B based sintered magnet has excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains R2T14B grains, wherein, an R—Cu-M-C concentrated part is existed in a grain boundary formed between or among two or more adjacent R2T14B grains, and the concentrations of R (R is at least one from Sc, Y and the lanthanoide element), Cu, M (M is at least one from Ga, Si, Sn, Ge and Bi) and C in the R—Cu-M-C concentrated part are higher than those in the R2T14B grains respectively.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: September 10, 2019
    Assignee: TDK CORPORATION
    Inventors: Isao Kanada, Masashi Miwa, Haruna Nakajima, Eiji Kato
  • Patent number: 10412848
    Abstract: A power supply device 1 includes a main circuit board 20, a power component 22 connected to the main circuit board 20, a filter component 24 connected to the main circuit board 20, and a casing 10 which houses the main circuit board 20, the power component 22, and the filter component 24. The casing 10 includes a base plate 11 which includes a flat surface 11a in which a fin 14 for heat dissipation is provided on a bottom-surface side, and a protruding part 15 which protrudes from the flat surface toward the fin. The power component 22 and the main circuit board 20 are placed on the flat surface, and the filter component 24 is housed in the protruding part 15.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: September 10, 2019
    Assignee: TDK CORPORATION
    Inventors: Kengo Tsujimoto, Kouji Utsui, Akira Ikezawa
  • Publication number: 20190271897
    Abstract: Disclosed herein is an optical waveguide element that includes a substrate and a waveguide layer formed on the substrate and comprising lithium niobate. The waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part. The maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the ridge part.
    Type: Application
    Filed: May 13, 2019
    Publication date: September 5, 2019
    Applicant: TDK Corporation
    Inventors: Shinji IWATSUKA, Kenji SASAKI, Satoshi SHIRAI
  • Publication number: 20190272944
    Abstract: A coil device comprising; a winding coil including Cu and having a winding part and an extension line part which is pulled out from said winding part, a pair of electrodes made of a conductive material having, a connecting wire part having a connecting wire face connected with the extension line part and a protective face sandwiching said extension line part with said connecting wire face, and a base part provided with a mounting base face at one of the faces of the base and connected to said connecting wire part, a magnetic part including a magnetic material and covering at least said winding part and said connecting wire part.
    Type: Application
    Filed: April 30, 2019
    Publication date: September 5, 2019
    Applicant: TDK CORPORATION
    Inventors: Nobuo TAKAGI, Kazuteru KAKIZAKI, Setu TSUCHIDA