Patents by Inventor Takahisa FUKUDA

Takahisa FUKUDA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11915879
    Abstract: An electronic component includes an element body and at least one external electrode thereon. The element body has a dielectric and inner electrodes. Each external electrode includes a base layer connected to at least one the inner electrode. The base layer is formed on a plurality of surfaces of the element body and contains a metal and a first co-material mixed with the metal. Each external electrode also includes a plating layer formed on at least one face of the base layer. Each external electrode also includes an oxide layer formed on one or more faces of the base layer other than those faces of the base layer on which the plating layer is formed. The oxide layer has a surface layer made from an oxide film of the metal of the base layer and a second co-material.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: February 27, 2024
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Anju Okada, Mina Amano, Kiyoshiro Yatagawa, Takahisa Fukuda
  • Patent number: 11735372
    Abstract: A ceramic electronic device includes: a multilayer chip in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, a main component of the dielectric layers being ceramic, the plurality of internal electrode layers being alternately exposed to a first end face and a second end face of the multilayer chip, the first end face facing with the second end face; a first external electrode provided on the first end face; and a second external electrode provided on the second end face, wherein a silane film is provided on a surface of the ceramic electronic device, and wherein an organic compound is provided on the silane film, and has a siloxane bonding.
    Type: Grant
    Filed: February 10, 2022
    Date of Patent: August 22, 2023
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Kiyoshiro Yatagawa, Satoshi Kobayashi, Takahisa Fukuda
  • Patent number: 11688559
    Abstract: A multilayer ceramic capacitor includes: a multilayer chip in which each of dielectric layers and each of internal electrode layers are stacked, the plurality of internal electrode layers being exposed to at least one of a first end face and a second end face of the multilayer structure, the first end face being opposite to the second end face, a first external electrode provided on the first end face; a second external electrode provided on the second end face; and a fluorine compound that is adhered to at least a part of a region including a surface of the multilayer chip where neither the first external electrode nor the second external electrode is formed and surfaces of the first external electrode and the second external electrode, fluorine compound being released at a temperature of 380 degrees C. or more.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: June 27, 2023
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Kiyoshiro Yatagawa, Satoshi Kobayashi, Takahisa Fukuda
  • Publication number: 20230114467
    Abstract: A multi-layer ceramic electronic component includes: a ceramic body having a substantially rectangular parallelepiped shape; and external electrodes each including a base layer, a conductive resin layer, and first and second conductive layers. A conductive filler includes a core portion and a silver coating film made of silver and covering the core portion. In a cross-section parallel to the first and second axes, when a straight line parallel to the first axis is drawn to pass through a range distant from a base end portion, and when a thickness of the first conductive layer along the line is a conductor thickness, and the sum of lengths of the silver coating film along the line in all the conductive fillers on the line is a total thickness of silver coating, a ratio of the conductor thickness to the total thickness of silver coating is 2 or more and 10 or less.
    Type: Application
    Filed: August 2, 2022
    Publication date: April 13, 2023
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Satoshi KOBAYASHI, Kiyoshiro YATAGAWA, Takahisa FUKUDA
  • Patent number: 11626247
    Abstract: An electronic component includes an element body and external electrodes. The element body includes a dielectric and an internal electrode. Each of the external electrodes includes a base layer formed on multiple surfaces of the element body and an electrically-conducting material layer formed on the base layer, the base layer including a metal and co-material particles dispersed in the metal and being connected to the internal electrode. The co-material particles at an interface surface between the base layer and the electrically-conducting material layer have edges covered with the metal at the interface surface. The electrically-conducting material layer is in contact with the co-material particles at the interface surface and the metal covering the edges of the co-material particles at the interface surface.
    Type: Grant
    Filed: August 26, 2021
    Date of Patent: April 11, 2023
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Junichi Shinozaki, Toshiki Kondo, Ryosuke Hoshino, Takahisa Fukuda
  • Patent number: 11562861
    Abstract: A manufacturing method of a ceramic electronic device includes: preparing a ceramic electronic device having a multilayer chip, a first external electrode, and a second external electrode, and bonding an organic compound having a siloxane bonding to at least a part of a region including a surface of the multilayer chip where neither the first external electrode nor the second external electrode is formed and surfaces of the first external electrode and the second external electrode, by contacting heated silicon rubber to the region.
    Type: Grant
    Filed: February 10, 2022
    Date of Patent: January 24, 2023
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Kiyoshiro Yatagawa, Satoshi Kobayashi, Takahisa Fukuda
  • Patent number: 11557434
    Abstract: A ceramic electronic component includes external electrodes having conductive resin layers thereinside on respective two ends opposed to each other in a rectangular parallelepiped ceramic component body. Each of the external electrodes includes an underlying metal layer, an intermediate metal layer, a conductive resin layer, an external metal layer. A tip angle ? between an outer face of a tip portion of the wraparound portion of the underlying metal layer and a surface of the ceramic component body is 20° or smaller, and a tip angle ? between an outer face of a tip portion of the wraparound portion of the intermediate metal layer and a surface of the ceramic component body is 20° or smaller.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: January 17, 2023
    Assignee: TAIYO YUDEN CO., LTD
    Inventors: Satoshi Kobayashi, Takahisa Fukuda, Tomoaki Nakamura, Mikio Tahara, Naoki Saito, Kiyoshiro Yatagawa
  • Publication number: 20220328251
    Abstract: A ceramic electronic component includes an element body, a first external electrode, and a second external electrode. The element body includes a dielectric, at least one first internal electrode, and at least one second internal electrode laminated over the first internal electrode via the dielectric interposed therebetween. The element body has a top surface, a bottom surface, a pair of side surfaces, a first end surface, and a second end surface, thereby the element body having a generally cuboid shape. The first internal electrode is exposed on the first end surface. The second internal electrode is exposed on the second end surface. The side surfaces of the element body are concavely curved along a longitudinal direction, so that the element body has a longitudinal central part at which a width is less than a width at the end surface. The first external electrode is formed on the first end surface and electrically connected with the first internal electrode.
    Type: Application
    Filed: March 25, 2022
    Publication date: October 13, 2022
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Anju OKADA, Mina AMANO, Takahisa FUKUDA
  • Patent number: 11417468
    Abstract: A ceramic electronic device includes: a multilayer chip in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, the multilayer chip having a rectangular parallelepiped shape, the plurality of internal electrode layers being alternately exposed to a first end face and a second end face of the multilayer chip, the first end face facing with the second end face, a first external electrode provided on the first end face; a second external electrode provided on the second end face; and an organic compound that is adhered to at least a part of a region including a surface of the multilayer chip where neither the first external electrode nor the second external electrode is formed and surfaces of the first external electrode and the second external electrode, and has a siloxane bonding.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: August 16, 2022
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Kiyoshiro Yatagawa, Satoshi Kobayashi, Takahisa Fukuda
  • Publication number: 20220165505
    Abstract: A manufacturing method of a ceramic electronic device includes: preparing a ceramic electronic device having a multilayer chip, a first external electrode, and a second external electrode, and bonding an organic compound having a siloxane bonding to at least a part of a region including a surface of the multilayer chip where neither the first external electrode nor the second external electrode is formed and surfaces of the first external electrode and the second external electrode, by contacting heated silicon rubber to the region.
    Type: Application
    Filed: February 10, 2022
    Publication date: May 26, 2022
    Inventors: Kiyoshiro YATAGAWA, Satoshi KOBAYASHI, Takahisa FUKUDA
  • Publication number: 20220165506
    Abstract: A ceramic electronic device includes: a multilayer chip in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, a main component of the dielectric layers being ceramic, the plurality of internal electrode layers being alternately exposed to a first end face and a second end face of the multilayer chip, the first end face facing with the second end face; a first external electrode provided on the first end face; and a second external electrode provided on the second end face, wherein a silane film is provided on a surface of the ceramic electronic device, and wherein an organic compound is provided on the silane film, and has a siloxane bonding.
    Type: Application
    Filed: February 10, 2022
    Publication date: May 26, 2022
    Inventors: Kiyoshiro YATAGAWA, Satoshi KOBAYASHI, Takahisa FUKUDA
  • Publication number: 20220068564
    Abstract: An electronic component includes an element body and external electrodes. The element body includes a dielectric and an internal electrode. Each of the external electrodes includes a base layer formed on multiple surfaces of the element body and an electrically-conducting material layer formed on the base layer, the base layer including a metal and co-material particles dispersed in the metal and being connected to the internal electrode. The co-material particles at an interface surface between the base layer and the electrically-conducting material layer have edges covered with the metal at the interface surface. The electrically-conducting material layer is in contact with the co-material particles at the interface surface and the metal covering the edges of the co-material particles at the interface surface.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 3, 2022
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Junichi SHINOZAKI, Toshiki KONDO, Ryosuke HOSHINO, Takahisa FUKUDA
  • Publication number: 20210375549
    Abstract: An electronic component includes an element body and at least one external electrode thereon. The element body has a dielectric and inner electrodes. Each external electrode includes a base layer connected to at least one the inner electrode. The base layer is formed on a plurality of surfaces of the element body and contains a metal and a first co-material mixed with the metal. Each external electrode also includes a plating layer formed on at least one face of the base layer. Each external electrode also includes an oxide layer formed on one or more faces of the base layer other than those faces of the base layer on which the plating layer is formed. The oxide layer has a surface layer made from an oxide film of the metal of the base layer and a second co-material.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 2, 2021
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Anju OKADA, Mina AMANO, Kiyoshiro YATAGAWA, Takahisa FUKUDA
  • Publication number: 20210175017
    Abstract: A ceramic electronic component includes external electrodes having conductive resin layers thereinside on respective two ends opposed to each other in a rectangular parallelepiped ceramic component body. Each of the external electrodes includes an underlying metal layer, an intermediate metal layer, a conductive resin layer, an external metal layer. A tip angle ? between an outer face of a tip portion of the wraparound portion of the underlying metal layer and a surface of the ceramic component body is 20° or smaller, and a tip angle ? between an outer face of a tip portion of the wraparound portion of the intermediate metal layer and a surface of the ceramic component body is 20° or smaller.
    Type: Application
    Filed: December 9, 2020
    Publication date: June 10, 2021
    Inventors: SATOSHI KOBAYASHI, TAKAHISA FUKUDA, TOMOAKI NAKAMURA, MIKIO TAHARA, NAOKI SAITO, KIYOSHIRO YATAGAWA
  • Patent number: 10998135
    Abstract: A ceramic electronic component includes external electrodes having conductive resin layers thereinside on respective two ends opposed to each other in a rectangular parallelepiped ceramic component body. Each of the external electrodes includes an underlying metal layer, an intermediate metal layer, a conductive resin layer, an external metal layer. A tip angle ? between an outer face of a tip portion of the wraparound portion of the underlying metal layer and a surface of the ceramic component body is 20° or smaller, and a tip angle ? between an outer face of a tip portion of the wraparound portion of the intermediate metal layer and a surface of the ceramic component body is 20° or smaller.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: May 4, 2021
    Assignee: Taiyo Yuden Co., Ltd
    Inventors: Satoshi Kobayashi, Takahisa Fukuda, Tomoaki Nakamura, Mikio Tahara, Naoki Saito, Kiyoshiro Yatagawa
  • Publication number: 20200312571
    Abstract: A multilayer ceramic capacitor includes: a multilayer chip in which each of dielectric layers and each of internal electrode layers are stacked, the plurality of internal electrode layers being exposed to at least one of a first end face and a second end face of the multilayer structure, the first end face being opposite to the second end face, a first external electrode provided on the first end face; a second external electrode provided on the second end face; and a fluorine compound that is adhered to at least a part of a region including a surface of the multilayer chip where neither the first external electrode nor the second external electrode is formed and surfaces of the first external electrode and the second external electrode, fluorine compound being released at a temperature of 380 degrees C. or more.
    Type: Application
    Filed: March 24, 2020
    Publication date: October 1, 2020
    Inventors: Kiyoshiro YATAGAWA, Satoshi KOBAYASHI, Takahisa FUKUDA
  • Publication number: 20200234885
    Abstract: A ceramic electronic device includes: a multilayer chip in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, the multilayer chip having a rectangular parallelepiped shape, the plurality of internal electrode layers being alternately exposed to a first end face and a second end face of the multilayer chip, the first end face facing with the second end face, a first external electrode provided on the first end face; a second external electrode provided on the second end face; and an organic compound that is adhered to at least a part of a region including a surface of the multilayer chip where neither the first external electrode nor the second external electrode is formed and surfaces of the first external electrode and the second external electrode, and has a siloxane bonding.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 23, 2020
    Inventors: Kiyoshiro YATAGAWA, Satoshi KOBAYASHI, Takahisa FUKUDA
  • Patent number: 10647602
    Abstract: A configuration for water purification undergoes the water supply step of taking in treatment water through a water suction port and pressure-feeding the treatment water, the air supply step of taking in air through an air suction port and supplying the air, the oxygen amount increasing step of pressurizing the air supplied at the air supply step to increase the total amount of oxygen, the ionization step of ionizing the pressurized air subjected to the oxygen amount increasing step, the mixing step of obtaining gas-liquid mixing fluid subjected to first fine air bubble formation by spraying the air into the flow of treatment water, and the accelerated spraying step of performing second fine air bubble formation by accelerating a flow velocity by a narrowed-diameter portion provided at a spray nozzle when the gas-liquid mixing fluid obtained through the mixing step is sprayed into the treatment water.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: May 12, 2020
    Assignees: Kunio FUKUDA, Takahisa FUKUDA
    Inventors: Kunio Fukuda, Takahisa Fukuda
  • Patent number: 10622151
    Abstract: In an exemplary embodiment, a multilayer ceramic capacitor has, at two opposing respective end parts of a capacitor body 11 of roughly rectangular solid shape, external electrodes 12 that each have a conductive resin layer F3 inside. Each of the external electrodes 12 continuously has an end face part 12a corresponding to one face, and a wraparound part 12b corresponding to four faces surrounding the one face, of the capacitor body 11. Also, the end face part 12a of each of the external electrodes 12 has a bulging part 12a1 on the outer face of the end face part 12a. An electronic component using the multilayer ceramic capacitor can maximally prevent the Manhattan phenomenon that may otherwise occur when the electronic component is mounted on a circuit board, even though its external electrodes have the conductive resin layer inside.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: April 14, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Satoshi Kobayashi, Takahisa Fukuda, Tomoaki Nakamura, Mikio Tahara
  • Publication number: 20190362895
    Abstract: A ceramic electronic component includes external electrodes having conductive resin layers thereinside on respective two ends opposed to each other in a rectangular parallelepiped ceramic component body. Each of the external electrodes includes an underlying metal layer, an intermediate metal layer, a conductive resin layer, an external metal layer. A tip angle ? between an outer face of a tip portion of the wraparound portion of the underlying metal layer and a surface of the ceramic component body is 20° or smaller, and a tip angle ? between an outer face of a tip portion of the wraparound portion of the intermediate metal layer and a surface of the ceramic component body is 20° or smaller.
    Type: Application
    Filed: May 17, 2019
    Publication date: November 28, 2019
    Inventors: SATOSHI KOBAYASHI, TAKAHISA FUKUDA, TOMOAKI NAKAMURA, MIKIO TAHARA, NAOKI SAITO, KIYOSHIRO YATAGAWA