Patents Assigned to TDK Corporation
  • Patent number: 10388448
    Abstract: A multilayer coil component includes an element body including soft magnetic metal powders and a coil disposed in the element body. The coil includes a plurality of internal conductors electrically connected to each other. The plurality of internal conductors are separated from each other in a first direction and are adjacent to each other in the first direction. An average particle diameter of the soft magnetic metal powders located at an inner side of the coil when viewing from the first direction is larger than an average particle diameter of the soft magnetic metal powders located between the internal conductors adjacent to each other in the first direction.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventors: Yuusuke Nagai, Takashi Suzuki, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
  • Patent number: 10389328
    Abstract: Disclosed herein is a differential mode filter that includes first and second terminal electrodes provided on a first flange part of a core, and first and second wires wound around a winding core part of the core in an opposite direction to each other and connected respectively to the first and second terminal electrodes. The first and second wires cross each other on the winding core part to form a plurality of crossing portions that include first, second, and third crossing portions that are first, second, and third occurrences counting from the one end of the first and second wires, respectively. A first crossing angle between the first and second wires at the first crossing portion is larger than at least one of second and third crossing angles between the first and second wires at the second and third portions, respectively.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventors: Tsutomu Kobayashi, Toshio Tomonari, Emi Ito, Yuma Komaya
  • Patent number: 10386170
    Abstract: An angle sensor includes detection units and an angle computation unit. The detection units detect a composite magnetic field of a magnetic field to be detected and a noise magnetic field. Each detection unit generates a first detection signal representing the strength of a component in a first direction of the composite magnetic field, and a second detection signal representing the strength of a component in a second direction of the composite magnetic field. The angle computation unit generates a detected angle value by performing computations using a plurality of pairs of first and second detection signals generated at the detection units wherein an error of the detected angle value resulting from the noise magnetic field is made smaller than in the case of generating the detected angle value on the basis of only a pair of first and second detection signals generated at any one of the detection units.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventors: Kenkichi Anagawa, Shinichirou Mochizuki
  • Patent number: 10388440
    Abstract: An R-T-B based sintered magnet includes R2T14B crystal grains. A grain boundary formed by the two or more adjacent R2T14B crystal grains includes an R—N—O—C concentrated part having higher concentrations of “R”, N, O, and C than those in the R2T14B crystal grains. “R” of the R—N—O—C concentrated part includes Y. A ratio of Y atom to “R” atom in the R—N—O—C concentrated part is 0.65 or more and 1.00 or less. A ratio of O atom to “R” atom in the R—N—O—C concentrated part is more than 0 and 0.20 or less. A ratio of N atom to “R” atom in the R—N—O—C concentrated part is 0.03 or more and 0.15 or less.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventor: Atsushi Tada
  • Patent number: 10386169
    Abstract: A first, a second, and a third computing circuit respectively generate a first post-computation signal with a second harmonic component reduced as compared with first and second signals, a second post-computation signal with the second harmonic component reduced as compared with third and fourth signals, and a third post-computation signal with the second harmonic component reduced as compared with fifth and sixth signals. A fourth and a fifth computing circuit respectively generate a fourth post-computation signal with a third harmonic component reduced as compared with the first and second post-computation signals, and a fifth post-computation signal with the third harmonic component reduced as compared with the second and third post-computation signals. A sixth computing circuit determines a detected angle value based on the fourth and fifth post-computation signals.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventors: Yohei Hirota, Homare Tokida, Hiraku Hirabayashi
  • Patent number: 10388452
    Abstract: Disclosed herein is a coil component that includes a coil conductor part, and first and second high permeability parts provided respectively on both sides of the coil conductor part in a coil axis direction. The second high permeability part has a larger thickness in the coil axis direction than the first high permeability part. A low permeability part that segments at least a part of a magnetic path exists between the first and second high permeability parts in an outer diameter area of the coil conductor part when viewed in the coil axis direction.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventors: Toshio Tomonari, Sachiko Takano, Shigeki Sato
  • Patent number: 10388856
    Abstract: Provided is a magnetoresistance effect element that that generates a high MR ratio at a lower RA than a TMR element using a material of a conventional tunnel barrier layer or MgAl2O4. The magnetoresistance effect element includes a laminate in which an underlayer, a first ferromagnetic metal layer, a tunnel harrier layer, and a second ferromagnetic metal layer are laminated in that order, wherein the underlayer is made of TiN, NbN, TaN, ZrN or mixed crystals thereof, and the tunnel barrier layer is made of a compound that has a spinel structure and expressed by composition formula (1) below: (1) AxIn2Oy, where A is the non-magnetic divalent cation and represents cations of one or more elements selected from the group consisting of magnesium and zinc, x represents a number satisfying 0<x?2, and y represents a number satisfying 0<y?4.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventor: Tomoyuki Sasaki
  • Publication number: 20190252753
    Abstract: A dielectric filter includes a plurality of dielectric resonators. The dielectric filter also includes: a plurality of resonator body portions each formed of a first dielectric and respectively corresponding to the plurality of dielectric resonators, the first dielectric having a first relative permittivity; a peripheral dielectric portion formed of a second dielectric and lying around the plurality of resonator body portions, the second dielectric having a second relative permittivity lower than the first relative permittivity; and a shield portion formed of a conductor. Either one of a temperature coefficient of resonant frequency of the first dielectric at 25° C. to 85° C. and a temperature coefficient of resonant frequency of the second dielectric at 25° C. to 85° C. has a positive value and the other has a negative value.
    Type: Application
    Filed: December 20, 2018
    Publication date: August 15, 2019
    Applicant: TDK CORPORATION
    Inventors: Yuta ASHIDA, Shigemitsu TOMAKI, Yousuke FUTAMATA, Shin TAKANE, Yasuharu MIYAUCHI, Kazunari KIMURA
  • Publication number: 20190252593
    Abstract: A thermoelectric conversion device includes: at least one thermoelectric conversion element which is provided on a specific plane, and a heat transfer part which is thermally connected to the at least one thermoelectric conversion element, wherein the heat transfer part includes a separation portion which is disposed with a gap between the heat transfer part and at least a portion of the at least one thermoelectric conversion element, and a heat transfer portion which protrudes toward a side facing the at least one thermoelectric conversion element in a state where a portion thereof on a side opposite to the side facing the at least one thermoelectric conversion element is recessed, and is thermally connected to the at least one thermoelectric conversion element via the heat transfer portion.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 15, 2019
    Applicant: TDK CORPORATION
    Inventors: Makoto SHIBATA, Takashi ASATANI
  • Publication number: 20190252749
    Abstract: A magnetoresistance effect device includes first and second ports, first and second circuit units, and reference potential and DC applying terminals. The first and second circuit units respectively include first and second magnetoresistance effect elements and first and second conductors. In the second conductor, the positional relationship between first and second end faces respectively on the first and opposite conductor sides in the first magnetoresistance effect element with respect to a flowing direction of a direct current flowing inside the first magnetoresistance effect element and the positional relationship between first and second end faces respectively on the second and opposite conductor sides in the second magnetoresistance effect element with respect to a flowing direction of a direct current flowing in the second magnetoresistance effect element are opposite each other.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 15, 2019
    Applicant: TDK CORPORATION
    Inventors: Tsuyoshi SUZUKI, Shinji HARA
  • Publication number: 20190252130
    Abstract: An electrochemical device excellent in connection reliability is provided. An EDLC 2 includes: an element body 10 in which a pair of inner electrodes 16, 26 are laminated so as to sandwich a separator sheet 11; an exterior sheet 4 covering the element body 10; seal parts 40, 42 sealing peripheral parts of the exterior sheet 4 so that the element body 10 is immersed in an electrolyte; and lead terminals 18, 28 extending outward from the seal parts 40, 42 of the exterior sheet 4. At least one surface of the lead terminals 18, 28 is etched so as to form unevenness 180, 280.
    Type: Application
    Filed: February 1, 2019
    Publication date: August 15, 2019
    Applicant: TDK CORPORATION
    Inventors: Hiroaki HASEGAWA, Hidetake ITOH, Yoshihiko OHASHI, Yuji YOSHINO, Kazunori YOSHIKAWA, Kiyonori HINOKI
  • Publication number: 20190252720
    Abstract: An active material layer containing a compound represented by a general formula (1): LiaVbAlcTidPeO12 (1), where a, b, c, d, and e in the general formula (1) are numbers satisfying 0.5?a?3.0, 1.20<b?2.00, 0.01?c<0.06, 0.01?d<0.60, and 2.80?e?3.20; and a solid electrolyte layer containing a compound represented by a general formula (2): LifVgAlhTiiPjO12 (2), where f, g, h, i, and j in general formula (2) are numbers satisfying 0.5?f?3.0, 0.01?g<1.00, 0.09<h?0.30, 1.40<i?2.00, and 2.80?j?3.20.
    Type: Application
    Filed: September 25, 2017
    Publication date: August 15, 2019
    Applicant: TDK CORPORATION
    Inventors: Hiroshi SATO, Masahiro OISHI, Takeo TSUKADA, Gakuho ISOMICHI, Tetsuya UENO
  • Patent number: 10379321
    Abstract: A lens drive device includes a movable portion, a fixed portion, and a nonmagnetic case. The movable portion includes a double-pole magnet having two pairs of magnetic poles, a first coil opposing to the double-pole magnet in a perpendicular direction to a light axis, and a lens holder being movable to the double-pole magnet in a direction of the light axis. The fixed portion includes a second coil arranged so as to oppose to the double-pole magnet in the direction of the light axis. The nonmagnetic case is attached to the fixed portion so as to cover the movable portion. The double-pole magnet includes a first section and a second section. L1/L2 is 0.9 to 1.1, where L1 and L2 are respectively a length of the first and second sections in the direction of the light axis.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: August 13, 2019
    Assignee: TDK CORPORATION
    Inventor: Shusuke Ichihashi
  • Patent number: 10378929
    Abstract: A movement detection unit includes a movable body, a first sensor, a second sensor, and a signal processor. The movable body performs a movement in a first direction. The first sensor detects a first magnetic field change which is caused by the movement of the movable body and outputs a first signal. The second sensor is provided in the first direction at a location different from a location of the first sensor. The second sensor detects a second magnetic fled change which is caused by the movement of the movable body and outputting a second signal. The signal processor includes a signal generating circuit that generates a third signal and a fourth signal on a basis of the first signal. The third signal and the fourth signal have waveforms different from each other.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: August 13, 2019
    Assignee: TDK CORPORATION
    Inventor: Takakazu Imai
  • Patent number: 10381159
    Abstract: A plurality of dielectric layers containing one of CaZrO3 and SrZrO3 and a plurality of internal electrodes containing Ni are alternately disposed in a second direction. The plurality of internal electrodes includes a plurality of first internal electrodes and a plurality of second internal electrodes. Each of first connecting portions of the first internal electrodes includes a first end portion connected to a first terminal electrode. Each of second connecting portions of the second internal electrodes includes a second end portion connected to a second terminal electrode. The first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction. The second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 13, 2019
    Assignee: TDK CORPORATION
    Inventors: Takuya Imaeda, Toshihiro Iguchi, Satoshi Takahara
  • Patent number: 10381158
    Abstract: An electronic device includes a chip component and a metal terminal. The chip component has an element body where internal electrodes are laminated inside and a terminal electrode formed outside the element body and connected with end parts of the internal electrodes. The metal terminal is connected with the terminal electrode of the chip component. The metal terminal includes an electrode face portion and a mount portion. The electrode face portion is arranged correspondingly with an end surface of the terminal electrode. The mount portion is mounted on a mount surface. The electrode face portion is provided with an opening portion so that a part of the terminal electrode corresponding with at least a part of the internal electrodes is exposed to the outside.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: August 13, 2019
    Assignee: TDK CORPORATION
    Inventors: Norihisa Ando, Sunao Masuda, Masahiro Mori, Kayou Matsunaga, Kosuke Yazawa
  • Patent number: 10381700
    Abstract: A dielectric filter includes: a resonator body formed of dielectric material; surrounding dielectric portion present around the resonator body and formed of dielectric material having a relative permittivity lower than the dielectric material used to form the resonator body; and an input/output conductor portion formed of a conductor and configured to perform at least one supply of an electromagnetic wave to the resonator body and reception of an electromagnetic wave from the resonator body. The resonator body has a first end face and a second end face located at opposite ends in a first direction. The input/output conductor portion is located either at least part of the input/output conductor portion is contained in a space formed by shifting a virtual plane corresponding to the first end face in the first direction away from the second end face, or the input/output conductor portion is in contact with the space.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: August 13, 2019
    Assignee: TDK CORPORATION
    Inventors: Yuta Ashida, Kazunari Kimura, Shigemitsu Tomaki
  • Patent number: 10381939
    Abstract: A switch drive circuit drives a full-bridge output stage connected to a transformer to alternately switch between a first cycle in which a current in a first direction is supplied to the transformer and a second cycle in which a current in a second direction is supplied to the transformer. The switch drive circuit includes a mode in which a dead time of the output stage is set in accordance with a magnitude of a current flown in one of the first and second cycles, the dead time becoming an operation changing factor in the other cycle. Or, the switch drive circuit includes a mode in which the dead time of the output stage is set in accordance with a magnitude of an average current obtained by averaging currents flown in the first and second cycles. Or, the switch drive circuit switches between these modes in accordance with a signal.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: August 13, 2019
    Assignees: Rohm Co., Ltd., TDK Corporation
    Inventors: Yuichi Kokusho, Takuya Sakamoto
  • Patent number: 10381997
    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.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: August 13, 2019
    Assignee: TDK CORPORATION
    Inventors: Tetsuya Shibata, Junichiro Urabe, Atsushi Shimura, Takekazu Yamane
  • Patent number: D857020
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: August 20, 2019
    Assignee: TDK CORPORATION
    Inventors: Yoshiki Ohta, Kazuo Nagata, Shuto Ono, Mio Hamashima