Patents by Inventor Keisuke FUKUMURA

Keisuke FUKUMURA 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: 11315736
    Abstract: A multilayer body of a multilayer ceramic capacitor includes first and second side margin portions that each have an average amount of grain boundary segregation of Ni larger than that an average amount of grain boundary segregation of Ni in a plurality of dielectric layers at a portion located in an inner layer portion of the multilayer body.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: April 26, 2022
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yuichiro Yao, Keisuke Fukumura
  • Patent number: 11257625
    Abstract: A multilayer ceramic capacitor includes a multilayer body in which a plurality of internal electrodes including Ni and a plurality of ceramic dielectric layers are alternately stacked, and external electrodes. The ceramic dielectric layer includes an inner dielectric layer located between internal electrodes, and an outer dielectric layer located outside in a stacking direction and including at least NiO. A difference between average grain sizes of dielectric grains of the outer dielectric layers and the inner dielectric layers is about 10% or less. A molar amount of NiO with respect to about 100 moles of Ti is larger by about 0.6 mole or more in the outer dielectric layer than in the inner dielectric layer.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: February 22, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yuichiro Yao, Keisuke Fukumura
  • Patent number: 10950385
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and inner electrode layers, and a pair of outer electrodes on end surfaces of the multilayer body and electrically connected to the inner electrode layers. The outer electrodes each include a base electrode layer, a resin electrode layer on a surface of the base electrode layer and including a thermosetting resin and a metal component, a resin layer not containing an electrically conductive component, and a plating layer on the resin electrode layer. The resin layers cover the base electrode layers in regions located on the second main surface side of the multilayer body, and the resin electrode layers cover the base electrode layers in portions where the resin layers are not located and cover the resin layers.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: March 16, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Keisuke Fukumura
  • Publication number: 20200411246
    Abstract: A multilayer body of a multilayer ceramic capacitor includes first and second side margin portions that each have an average amount of grain boundary segregation of Ni larger than that an average amount of grain boundary segregation of Ni in a plurality of dielectric layers at a portion located in an inner layer portion of the multilayer body.
    Type: Application
    Filed: June 12, 2020
    Publication date: December 31, 2020
    Inventors: Yuichiro YAO, Keisuke FUKUMURA
  • Publication number: 20200126731
    Abstract: A multilayer ceramic capacitor includes a multilayer body in which a plurality of internal electrodes including Ni and a plurality of ceramic dielectric layers are alternately stacked, and external electrodes. The ceramic dielectric layer includes an inner dielectric layer located between internal electrodes, and an outer dielectric layer located outside in a stacking direction and including at least NiO. A difference between average grain sizes of dielectric grains of the outer dielectric layers and the inner dielectric layers is about 10% or less. A molar amount of NiO with respect to about 100 moles of Ti is larger by about 0.6 mole or more in the outer dielectric layer than in the inner dielectric layer.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 23, 2020
    Inventors: Yuichiro YAO, Keisuke FUKUMURA
  • Publication number: 20190131076
    Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and inner electrode layers, and a pair of outer electrodes on end surfaces of the multilayer body and electrically connected to the inner electrode layers. The outer electrodes each include a base electrode layer, a resin electrode layer on a surface of the base electrode layer and including a thermosetting resin and a metal component, a resin layer not containing an electrically conductive component, and a plating layer on the resin electrode layer. The resin layers cover the base electrode layers in regions located on the second main surface side of the multilayer body, and the resin electrode layers cover the base electrode layers in portions where the resin layers are not located and cover the resin layers.
    Type: Application
    Filed: October 26, 2018
    Publication date: May 2, 2019
    Inventor: Keisuke FUKUMURA