Patents Assigned to TDK Corporation
  • Publication number: 20200335262
    Abstract: Disclosed herein is a coil component that includes a magnetic element body, a coil conductor embedded in the magnetic element body and having an end portion exposed from the magnetic element body, and a terminal electrode connected to the end portion of the coil conductor. The terminal electrode includes a conductive resin contacting the end portion of the coil conductor and containing conductive particles and a resin material, and a metal film covering the conductive resin. The conductive resin including a first conductive resin contacting the end portion of the coil conductor, and a second conductive resin contacting the metal film without contacting the end portion of the coil conductor. A specific surface area of the conductive particles contained in the first conductive resin is larger than that of a conductive particles contained in the second conductive resin.
    Type: Application
    Filed: April 6, 2020
    Publication date: October 22, 2020
    Applicant: TDK CORPORATION
    Inventors: Toru Tonogai, Yuichi Oyanagi, Kyosuke Inui, Maki Mannen
  • Publication number: 20200335691
    Abstract: A spin-orbit-torque magnetization rotational element and a spin-orbit-torque magnetoresistance effect element capable of easily rotating or reversing magnetization of a ferromagnetic layer. The spin-orbit-torque magnetization rotational element includes spin-orbit-torque wiring and a first ferromagnetic layer laminated on the spin-orbit-torque wiring in a first direction, wherein the spin-orbit-torque wiring includes a first region extending in a second direction, a second region extending in a third direction different from the second direction, and an intersection region where the first region and the second region intersect, and wherein the first ferromagnetic layer and the intersection region at least partially overlap in a plan view from the first direction.
    Type: Application
    Filed: March 3, 2020
    Publication date: October 22, 2020
    Applicant: TDK CORPORATION
    Inventors: Tomoyuki SASAKI, Yohei SHIOKAWA, Minoru SANUKI
  • Publication number: 20200334017
    Abstract: A product-sum operation device, a neuromorphic device, and a method for using the product-sum operation device are provided which can, when applied to a neural network, curb the possibility that the performance of the neural network may be greatly impaired. The product-sum operation device includes a product operator and a sum operator. The product operator includes a plurality of product operation elements, each of which is a resistance change element. The sum operator includes an output detector that detects the sum of outputs from the plurality of product operation elements and the resistance change element includes a fuse portion which is disconnected when a malfunction which increases an output current from the resistance change element has occurred in the resistance change element.
    Type: Application
    Filed: December 12, 2018
    Publication date: October 22, 2020
    Applicant: TDK CORPORATION
    Inventor: Tatsuo SHIBATA
  • Publication number: 20200334015
    Abstract: A multiply and accumulate calculation device includes a multiple calculation unit and a accumulate calculation unit. The multiple calculation unit includes a plurality of multiple calculation elements, which are variable resistance elements, and at least one reference element. The accumulate calculation unit includes an output detector configured to detect a total value of at least outputs from the plurality of multiple calculation elements. Each of the plurality of multiple calculation elements is a magnetoresistance effect element including a magnetized free layer having a magnetic domain wall, a magnetization fixed layer in which a magnetization direction is fixed, and a nonmagnetic layer sandwiched between the magnetized free layer and the magnetized fixed layer. The reference element is a reference magnetoresistance effect element having a magnetization free layer that does not have the magnetic domain wall.
    Type: Application
    Filed: February 27, 2019
    Publication date: October 22, 2020
    Applicant: TDK CORPORATION
    Inventors: Tatsuo SHIBATA, Tomoyuki SASAKI
  • Patent number: 10811176
    Abstract: A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe—Si—O based oxide. The insulation film includes a Si—O based oxide.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 20, 2020
    Assignee: TDK CORPORATION
    Inventors: Yousuke Futamata, Ryoma Nakazawa, Takeshi Takahashi, Junichi Shimamura
  • Patent number: 10811591
    Abstract: A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particles include a core and a shell covering the core; the average value of the contents of bismuth in the cores is expressed as CCORE % by mass, the average value of the contents of bismuth in the shells is expressed as CSHELL % by mass, and the CCORE is lower than the CSHELL; and the number of all the particles comprised in the piezoelectric composition is expressed as N, the number of the crystal particles including the core and the shell is expressed as n, and n/N is 0.10 to 1.00.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 20, 2020
    Assignee: TDK CORPORATION
    Inventors: Masashi Kitazaki, Keisuke Teranishi, Makoto Ishizaki
  • Patent number: 10813220
    Abstract: An electronic component embedded substrate includes: a substrate that includes an insulating layer and has a first principal surface and a second principal surface; an electronic component that is embedded in the substrate and has at least one first terminal, at least one second terminal, and a capacity part; at least one via conductor that are formed in the insulating layer and electrically connected to the second terminal; and an adhesion layer that is in contact with the second terminal on an end face of the second terminal which are close to the second principal surface. The electronic component is laminated with the insulating layer, and adhesion strength between the adhesion layer and the insulating layer is higher than that between the second terminal and the insulating layer.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: October 20, 2020
    Assignee: TDK CORPORATION
    Inventors: Mitsuhiro Tomikawa, Koichi Tsunoda, Kazuhiro Yoshikawa, Kenichi Yoshida
  • Patent number: 10811186
    Abstract: Disclosed herein is a magnetic coupling device that includes first and second coil units that transmit power or signals with each other by wireless. Each of the first and second coil units includes a first coil and a second coil. The first coil of the first coil unit and the first coil of the second coil unit are magnetically coupled to each other. The second coil of the first coil unit and the second coil of the second coil unit are magnetically coupled to each other. At least one of the first and second coil units has an electromagnetic shielding member disposed at a position preventing magnetic coupling between the first and second coils.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: October 20, 2020
    Assignee: TDK CORPORATION
    Inventors: Kazuyoshi Hanabusa, Takashi Urano
  • Patent number: 10811191
    Abstract: An element body of a rectangular parallelepiped shape has a length in a height direction larger than a length in a width direction and has a length in a longitudinal direction larger than the length in the height direction. A terminal electrode is disposed at an end of the element body in the width direction and extends in the longitudinal direction. The element body includes a pair of principle surfaces opposing each other in the height direction, a pair of end surfaces opposing each other in the longitudinal direction, and a pair of side surfaces opposing each other in the width direction. The terminal electrode includes a conductor disposed on the side surface. The conductor includes a protrusion having a length in the longitudinal direction larger than a length in the height direction.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: October 20, 2020
    Assignee: TDK CORPORATION
    Inventors: Fumiaki Satoh, Toru Onoue, Takuto Okamoto
  • Publication number: 20200327400
    Abstract: The product-sum operation device includes a product operator and a sum operator. The product operator includes a plurality of product operation elements, and an alternative element that, when any of the plurality of product operation elements has malfunctioned, is used instead of the malfunctioning product operation element. Each of the plurality of product operation elements and the alternative element is a resistance change element. The sum operator includes an output detector which detects a sum of outputs from the plurality of product operation elements when the alternative element is not used.
    Type: Application
    Filed: December 12, 2018
    Publication date: October 15, 2020
    Applicant: TDK CORPORATION
    Inventors: Tatsuo SHIBATA, Tomoyuki SASAKI
  • Publication number: 20200326399
    Abstract: An object is to provide a magnetic sensor module reducing influence of heat generated from a coil on a magnetic sensor. A conventional method requires, on a magnetic sensor chip, multiple temperature measuring circuits corresponding to multiple magnetic sensors, and many pads for connection to an IC chip. Therefore, the problem is increase in size of the sensor chip mounting the sensors and in manufacturing cost. Provided is a magnetic sensor module comprising an IC chip including a first coil, a first pad connected to one end of the coil, and a second pad to the other end; a magnetic sensor chip disposed on the IC chip's surface, including a first magnetic sensor detecting first axial magnetism; a first external output terminal; a first conductive wire for connecting the first pad and terminal; a second external output terminal; and a second conductive wire for connecting the second pad and terminal.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 15, 2020
    Applicants: Asahi Kasei Microdevices Corporation, TDK Corporation, TDK Corporation
    Inventors: Masanori YOSHIDA, Yoshitaka OKUTSU, Kazuhiro ISHIDA, Kazuya WATANABE, Hiraku HIRABAYASHI, Masanori SAKAI
  • Publication number: 20200328021
    Abstract: The present invention is an inductor element having a conductor wound in a coil form, and a core part surrounding the coil and including a magnetic powder and a resin. The core part includes a top board part and a bottom board part respectively covering both ends of the coil, and an outer circumference part positioned at an outer circumference side of the coil, and a resin content of the outer circumference part is larger than a resin content of the top board part and also larger than a resin content of the bottom board part.
    Type: Application
    Filed: April 7, 2020
    Publication date: October 15, 2020
    Applicant: TDK CORPORATION
    Inventors: Yasuhide YAMASHITA, Chiomi SATO
  • Patent number: 10801993
    Abstract: A chemical sensor that enables high detection accuracy that includes a soft-magnetic-material film, a magnetoresistance-effect element, a first film disposed over the soft-magnetic-material film, and a second film disposed over the magnetoresistance-effect element, wherein, when viewed from a direction perpendicular to the film surface of the soft-magnetic-material film, the soft-magnetic-material film is disposed at least partially so as not to overlap the magnetoresistance-effect element; when viewed from the direction perpendicular to the film surface of the soft-magnetic-material film, the magnetoresistance-effect element is disposed at least partially so as not to overlap the soft-magnetic-material film; and the second film has higher solubility in a specific liquid than the first film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Sachio Tsuboike, Susumu Haratani, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Patent number: 10799863
    Abstract: A chemical sensor that enables high detection accuracy. A chemical sensor includes a substrate, a magnetoresistance-effect element disposed over the substrate, a first film disposed over the magnetoresistance-effect element, and a second film disposed in a region in the vicinity of the magnetoresistance-effect element or over a region in the vicinity of the magnetoresistance-effect element, wherein the second film has higher solubility in a specific liquid than the first film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Sachio Tsuboike, Susumu Haratani, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Patent number: 10799864
    Abstract: To provide a chemical sensor that enables high detection accuracy. A chemical sensor includes a substrate, two or more magnetoresistance-effect elements disposed side by side in a substrate in-plane direction over the substrate, a first film disposed over a region between the magnetoresistance-effect elements adjacent to each other, and a second film disposed over the magnetoresistance-effect elements, wherein the second film has higher solubility in a specific liquid than the first film.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Sachio Tsuboike, Susumu Haratani, Sumiko Kitagawa, Takashi Kikukawa, Haruki Yuga
  • Patent number: 10804026
    Abstract: A method of manufacturing an inductor element includes preparing an insert member including a winding portion where a conductor is wound in a coil shape. A plurality of preliminary green compacts is obtained by conducting a preliminary compression molding of a granule containing a magnetic powder and a resin at a pressure of 2.5×102 to 1×103 MPa. The insert member and the plurality of preliminary green compacts are integrated so that a joint interface of the plurality of preliminary green compacts is formed intermittently.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Yasuhide Yamashita, Katsushi Yasuhara, Chiomi Sato
  • Patent number: 10804035
    Abstract: A ceramic electronic device includes multiple chip components and a pair of metal terminal portions. The chip components consist of a pair of chip end surfaces and four chip side surfaces. Terminal electrodes are formed on the pair of chip end surfaces. The pair of metal terminal portions is arranged correspondingly with the pair of chip end surfaces. Each of the pair of metal terminal portions includes an electrode face portion, multiple pairs of engagement arm portions, and a mount portion. The electrode face portion faces the chip end surface. The multiple pairs of engagement arm portions extend from the electrode face portion toward the chip side surface and sandwich and hold the chip components. The mount portion extends from one of terminal second sides toward the chip components and is partially substantially vertical to the electrode face portion.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Norihisa Ando, Katsumi Kobayashi, Sunao Masuda, Masahiro Mori, Kayou Matsunaga, Kosuke Yazawa
  • Patent number: 10804032
    Abstract: A multilayer capacitor includes an element assembly, a first external electrode, a second external electrode, and a plurality of internal electrodes which are disposed at the inside of the element assembly. The plurality of internal electrodes include a first internal electrode that is electrically connected to the first external electrode, a second internal electrode that is electrically connected to the second external electrode, and a plurality of third internal electrodes. The plurality of third internal electrodes are electrically connected to each other by a first connection conductor and a second connection conductor, a first capacitance portion is constituted by the first internal electrode and the third internal electrodes, a second capacitance portion is constituted by the second internal electrode and the third internal electrodes, and the first capacitance portion and the second capacitance portion are electrically connected in series.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Takeru Yoshida, Takuya Imaeda, Shogo Murosawa, Hideki Kamo, Naoto Imaizumi, Keiichi Takizawa
  • Patent number: 10804870
    Abstract: Provided is a magnetoresistance effect device that functions as a high frequency device such as a high frequency filter or the like. The magnetoresistance effect device includes a magnetoresistance effect element having a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, a first signal line configured to generate a high frequency magnetic field as a high frequency current flows, a direct current application terminal to which a power supply is able to be connected to cause a direct current to flow to the magnetoresistance effect element in a lamination direction, and an independent magnetic body configured to receive a high frequency magnetic field generated in the first signal line to oscillate magnetization and apply a magnetic field generated through the magnetization to the magnetoresistance effect element.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventor: Takekazu Yamane
  • Patent number: 10804033
    Abstract: The object of the present invention is to provide a dielectric ceramic composition having good properties, particularly good IR property and high temperature accelerated lifetime. The dielectric ceramic composition of the present invention has a main component made of a perovskite type compound expressed by a compositional formula of (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, m, x, y, and z of the above compositional formula all represent molar ratios, and each satisfies 0.9?m?1.1, 0?x?0.5, 0?y?0.3, 0?(x+y)?0.6, and 0.03?z?0.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 13, 2020
    Assignee: TDK CORPORATION
    Inventors: Dan Sakurai, Toshihiko Kaneko, Nobuto Morigasaki, Toshinari Takahashi, Yasuhiro Ito