Patents by Inventor Tatsuji Aoyama

Tatsuji Aoyama 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).

  • Publication number: 20220392713
    Abstract: An electrolytic capacitor includes an anode body having a dielectric layer disposed on a surface of the anode body, a solid electrolyte layer that is in contact with the dielectric layer, and an electrolytic solution. The solid electrolyte layer includes a conductive polymer. The electrolytic solution contains a first base component, a first acid component, and a second acid component. The first base component includes an amidine compound. The first acid component includes a composite compound of an inorganic acid and an organic acid. The second acid component includes at least one selected from a group consisting of boric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, and phosphonic acid.
    Type: Application
    Filed: August 9, 2022
    Publication date: December 8, 2022
    Inventors: Yuichiro TSUBAKI, Kazuyo SAITO, Tatsuji AOYAMA
  • Patent number: 11508530
    Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: November 22, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuichiro Tsubaki, Tatsuji Aoyama
  • Publication number: 20220359127
    Abstract: A method for producing an electrolytic capacitor includes: preparing an anode foil, a cathode foil, and a fibrous structure, the anode foil having a porous portion including a dielectric layer; preparing a conductive polymer-containing liquid, the conductive polymer-containing liquid containing a conductive polymer component and a first solvent; forming a separator by removing at least a part of the first solvent after applying the conductive polymer-containing liquid to the fibrous structure; forming a capacitor element from the anode foil, the separator, and the cathode foil; and impregnating the capacitor element with an electrolytic solution. An electrical conductivity of the electrolytic solution at 30° C. is 3.0 mS/cm or more.
    Type: Application
    Filed: July 21, 2022
    Publication date: November 10, 2022
    Inventors: TATSUJI AOYAMA, YUJI OTSUKA, TOMOYUKI TASHIRO, KENTA CHASHIRO, YUICHIRO TSUBAKI
  • Publication number: 20220351913
    Abstract: An electrolytic capacitor includes a capacitor element and a liquid component. The capacitor element includes an anode body that includes a dielectric layer on a surface of the anode body and a conductive polymer that covers a part of the dielectric layer. The liquid component includes a sugar alcohol component and a polyalkylene glycol component. The sugar alcohol component contains at least one selected from the group consisting of a sugar alcohol having four or more hydroxy groups and a derivative of the sugar alcohol.
    Type: Application
    Filed: July 4, 2022
    Publication date: November 3, 2022
    Inventors: KAZUYO SAITO, YUICHIRO TSUBAKI, TATSUJI AOYAMA
  • Patent number: 11482383
    Abstract: Disclosed is an electrolytic capacitor including: a capacitor element including a pair of electrodes; an electrolyte interposed between the pair of electrodes, a pair of leads electrically connected to the pair of electrodes, respectively; a case in which the capacitor element and the electrolyte are accommodated, and that has an opening, a sealing member that seals the opening, and has a pair of insertion holes for leading out the leads; an insulating plate having a pair of through holes for leading out the leads; and a resin member filled between the sealing member and the insulating plate, wherein the insulating plate has a resin bonding surface that abuts against the resin member, and a mounting surface opposed to the resin bonding surface, and includes at least one protrusion or recess on the resin bonding surface.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: October 25, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Miyoko Masuda, Yuichiro Tsubaki, Tatsuji Aoyama, Daisuke Kubo
  • Publication number: 20220336160
    Abstract: An electrolytic capacitor includes a capacitor element and a liquid component. The capacitor element includes an anode body that includes a dielectric layer on a surface of the anode body and a conductive polymer that covers a part of the dielectric layer. The liquid component includes a first solvent and a polyalkylene glycol component. The first solvent contains at least a glycerin component.
    Type: Application
    Filed: July 4, 2022
    Publication date: October 20, 2022
    Inventors: KAZUYO SAITO, YUICHIRO TSUBAKI, TATSUJI AOYAMA
  • Patent number: 11456120
    Abstract: An electrolytic capacitor includes an anode body, a cathode body, and a conductive polymer and a liquid component that are disposed between the anode body and the cathode body. The liquid component contains an acid component, a base component, and an aromatic additive. The acid component includes at least one of an aromatic carboxylic acid and an aromatic carboxylic acid derivative. The at least one of the aromatic carboxylic acid and the aromatic carboxylic acid derivative includes at least two carboxy groups and at least one aromatic ring. A content proportion of the base component in the liquid component is more than or equal to 1% by mass. The aromatic additive includes an electron withdrawing group and an electron donating group. A content ratio of the aromatic additive contained in the liquid component is more than or equal to 50 parts by mass with respect to 100 parts by mass of the conductive polymer.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: September 27, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuichiro Tsubaki, Kazuyo Saito, Tatsuji Aoyama
  • Patent number: 11443901
    Abstract: An electrolytic capacitor includes an anode body having a dielectric layer disposed on a surface of the anode body, a solid electrolyte layer that is in contact with the dielectric layer, and an electrolytic solution. The solid electrolyte layer includes a conductive polymer. The electrolytic solution contains a first base component, a first acid component, and a second acid component. The first base component includes an amidine compound. The first acid component includes a composite compound of an inorganic acid and an organic acid. The second acid component includes at least one selected from a group consisting of boric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, and phosphonic acid.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: September 13, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuichiro Tsubaki, Kazuyo Saito, Tatsuji Aoyama
  • Publication number: 20220262577
    Abstract: A cathode foil for electrolytic capacitors includes a metal porous part, a metal core part that is continuous with the metal porous part, and a coating film covering the metal porous part. Pores in the metal porous part are open at a first main surface of the cathode foil. The coating film is disposed in a region from the first main surface to a depth more than or equal to 10% of a thickness of the metal porous part in a thickness direction of the metal porous part.
    Type: Application
    Filed: May 2, 2022
    Publication date: August 18, 2022
    Inventors: Mitsuhisa YOSHIMURA, Miwa OGAWA, Natsuyo SASADA, Tatsuji AOYAMA
  • Patent number: 11398358
    Abstract: An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode including a dielectric layer thereon and a cathode member including a conductive polymer and in contact with the dielectric layer. The capacitor element is impregnated with a liquid containing at least one of polyalkylene glycol and derivatives of polyalkylene glycol. The liquid further contains an oxidation inhibitor.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: July 26, 2022
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroyuki Matsuura, Shigetaka Furusawa, Hidehiro Sasaki, Tatsuji Aoyama
  • Publication number: 20220189705
    Abstract: An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes: an anode body including a dielectric layer; a cathode body; and a solid electrolyte in contact with the dielectric layer. The electrolytic solution includes a solvent, a solute, and a polymer component. The solvent includes an ethylene glycol compound. The polymer component includes polyalkylene glycol. The polyalkylene glycol includes at least one of (i) a mixture of polyoxyethylene and polyoxypropylene and (ii) an oxyethylene-oxypropylene copolymer. In the polyalkylene glycol, a molar ratio m/n of oxyethylene units to oxypropylene units is greater than 1.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Inventors: Yuichiro TSUBAKI, Tatsuji AOYAMA, Kazuyo SAITO, Yuji OTSUKA
  • Patent number: 11302486
    Abstract: An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes: an anode body including a dielectric layer; a cathode body; and a solid electrolyte in contact with the dielectric layer. The electrolytic solution includes a solvent, a solute, and a polymer component. The solvent includes an ethylene glycol compound. The polymer component includes polyalkylene glycol. The polyalkylene glycol includes at least one of (i) a mixture of polyoxyethylene and polyoxypropylene and (ii) an oxyethylene-oxypropylene copolymer. In the polyalkylene glycol, a molar ratio m/n of oxyethylene units to oxypropylene units is greater than 1.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: April 12, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuichiro Tsubaki, Tatsuji Aoyama, Kazuyo Saito, Yuji Otsuka
  • Publication number: 20220059292
    Abstract: An electrolytic capacitor includes a capacitor element and electrolytic solution. The capacitor element includes an anode body with an oxide film, and a solid electrolyte contacting the oxide film. The electrolytic solution contains a solvent and a solute. The solvent contains at least one selected from the group consisting of a lactone compound, a glycol compound, and a sulfone compound. The solute includes a first acid component and a base component. The first acid component includes at least one of a benzenedicarboxylic acid and a derivative of the benzenedicarboxylic acid. The base component includes at least one of an amine and an amidine. A concentration of the solute in the electrolytic solution ranges from 15% by mass to 40% by mass, inclusive. A ratio (V/Vw) of a formation voltage V of the oxide film to a rated voltage Vw of the electrolytic capacitor is less than or equal to 1.7.
    Type: Application
    Filed: November 4, 2021
    Publication date: February 24, 2022
    Inventors: Kazuyo SAITO, Yuichiro TSUBAKI, Tatsuji AOYAMA
  • Publication number: 20210383979
    Abstract: An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, an electrolyte solution. The capacitor element has an anode foil with a dielectric layer, and a cathode foil. The solid electrolyte layer is provided between the anode foil and the cathode foil. And the capacitor element is impregnated with the electrolyte solution. The cathode foil includes a covering layer that contains at least one metal selected from titanium and nickel or a compound of the at least one metal. And the solid electrolyte layer contains a conductive polymer, a polymer dopant, and a base component.
    Type: Application
    Filed: August 25, 2021
    Publication date: December 9, 2021
    Inventors: Tatsuji AOYAMA, Kazuhiro TAKATANI, Kazunari IMAMOTO, Yoshiaki ISHIMARU
  • Patent number: 11195664
    Abstract: An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes an anode body with an oxide film, and a solid electrolyte in contact with the oxide film. The electrolytic solution contains a solvent and a solute. The solvent contains at least one selected from the group consisting of a lactone compound, a glycol compound, and a sulfone compound. The solute includes a first acid component and a base component. The first acid component includes at least one of a benzenedicarboxylic acid and a derivative of the benzenedicarboxylic acid. The base component includes at least one of an amine and an amidine. A concentration of the solute in the electrolytic solution ranges from 15% by mass to 40% by mass, inclusive. A ratio (V/Vw) of a formation voltage V of the oxide film to a rated voltage Vw of the electrolytic capacitor is less than or equal to 1.7.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: December 7, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuyo Saito, Yuichiro Tsubaki, Tatsuji Aoyama
  • Publication number: 20210343482
    Abstract: An electrolytic capacitor according to the present disclosure includes an anode body, a cathode body, a solid electrolyte, and a liquid component. The anode body has a surface on which a dielectric layer is to be formed. The solid electrolyte is in contact with the dielectric layer and is disposed between the anode body and the cathode body. The liquid component is in contact with the dielectric layer and the solid electrolyte and contains a solvent and an acid component. The acid component includes a composite acid compound of an inorganic acid and an organic acid. The solvent contains a polyol including two or more hydroxyl groups and a polyalkylene glycol having three or more carbon atoms per repeating unit.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 4, 2021
    Inventors: Yuichiro TSUBAKI, Junya KUSHIZAKI, Tatsuji AOYAMA
  • Patent number: 11158463
    Abstract: An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, and a liquid substance. The capacitor element includes an anode foil with a dielectric layer, and a cathode foil. The solid electrolyte layer is provided between the anode foil and the cathode foil. The capacitor element is impregnated with the liquid substance that includes a solvent and a solute. The solute contains one of an acid component, a nitro compound, or a phenol compound. The cathode foil includes a covering layer that contains at least one selected from the group consisting of titanium, nickel, a compound including titanium, and a compound including nickel. And the solid electrolyte layer contains a conductive polymer and a base component. An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, and a liquid substance. The capacitor element includes an anode foil with a dielectric layer, and a cathode foil. The solid electrolyte layer is provided between the anode foil and the cathode foil.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: October 26, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tatsuji Aoyama, Kazuhiro Takatani, Kazunari Imamoto, Yoshiaki Ishimaru
  • Publication number: 20210313119
    Abstract: An electrolytic capacitor includes an anode body including a dielectric layer, a cathode body, and a conductive polymer layer and a liquid component that are disposed between the anode body and the cathode body. The cathode body includes a base material part having an outer surface that is roughened surface and has a pore opened at the outer surface, and an inorganic conductive layer covering at least a part of the outer surface. The base material part includes a first coating layer disposed along at least a part of inner wall of the pore. The first coating layer contains phosphorus.
    Type: Application
    Filed: June 15, 2021
    Publication date: October 7, 2021
    Inventors: Yoshiaki ISHIMARU, Kazunari IMAMOTO, Tatsuji AOYAMA
  • Patent number: 11087928
    Abstract: An electrolytic capacitor includes an anode body including a dielectric layer, a cathode body, and a conductive polymer layer and a liquid component that are disposed between the anode body and the cathode body. The cathode body includes a base material part having an outer surface that is roughened surface and has a pore opened at the outer surface, and an inorganic conductive layer covering at least a part of the outer surface. The base material part includes a first coating layer disposed along at least a part of inner wall of the pore. The first coating layer contains phosphorus.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: August 10, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshiaki Ishimaru, Kazunari Imamoto, Tatsuji Aoyama
  • Patent number: 11081286
    Abstract: A method for manufacturing an electrolytic capacitor includes a first step, a second step, and a third step. In the first step, a capacitor element is formed. The capacitor element includes an anode body, a cathode body, and a separator. The anode body includes a dielectric layer formed on a surface of the anode body. And the separator is disposed between the anode body and the cathode body. In the second step, the capacitor element is impregnated with a treatment solution containing an acid component and a base component. In the third step, the capacitor element is, after the second step, impregnated with a conductive polymer dispersion in a state that a part of the treatment solution remains in the capacitor element. The conductive polymer dispersion is obtained by dispersing, in a solvent, conductive polymer particles each including polyanion. A pH of the treatment solution is higher than a pH of the conductive polymer dispersion.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: August 3, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shumpei Matsushita, Tomoyuki Tashiro, Takayuki Matsumoto, Tatsuji Aoyama