Patents by Inventor Yuuji Aoki

Yuuji Aoki 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: 6423103
    Abstract: First, an anode lead is led out of an anode member. Next, a dielectric film is formed at a surface of the anode member by anodic oxidation to form a capacitor element. Thereafter, a water-repellent agent is applied on a predetermined position of the anode lead. In succession, the capacitor element is immersed in an oxidant solution of a mixture solvent of alcohol and water, followed by drying. The capacitor element is then immersed in an alcoholic solution of a conductive polymeric monomer to polymerize a conductive polymer electrolyte on a surface of the capacitor element by chemical oxidation.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: July 23, 2002
    Assignee: NEC Tokin Toyama, Ltd.
    Inventors: Kenji Araki, Yuuji Aoki, Daisuke Takada, Kenichi Takahashi
  • Patent number: 6110235
    Abstract: A fabrication method of a solid electrolytic capacitor is provided, which decreases the leakage current of a solid electrolytic capacitor without deterioration of ESR. This method is comprised of the steps (a) to (e). In the step (a), a capacitor body is formed by a valve metal, the body serving as an anode of the capacitor. In the step (b), an oxide layer of the valve metal is formed to cover a surface of the capacitor body by anodic oxidation, the oxide layer serving as a dielectric of the capacitor. In the step (c), a layer of an organic conducting polymer is formed on the oxide layer, the layer of the organic conducting polymer serving as a solid electrolyte of the capacitor. In the step (d), the capacitor body with the oxide layer and the layer of the organic conducting polymer is immersed in a reoxidation solution, the reoxidation solution containing a mixture of water and alcohol or a mixture of water and ketone as a solvent.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 29, 2000
    Assignee: NEC Corporation
    Inventors: Kenji Araki, Satoshi Arai, Yuuji Aoki, Kenichi Takahashi, Takashi Fukaumi
  • Patent number: 5965062
    Abstract: An electrically-conductive polymer having an improved heat resistance is provided. This polymer contains an electrically-conductive polymer matrix, a multivalent proton acid, and an aromatic compound. The cleavage reaction of the main chain of the electrically-conductive polymer matrix is suppressed. As the polymer matrix, a polymer of pyrrole, thiophene, or aniline, or one of derivatives of pyrrole, thiophene, or aniline is preferably used. As the multivalent proton acid, a proton acid having two or more hydrogen atoms such as sulfuric acid, citric acid, salicylic acid, oxalic acid, and phthalic acid in each molecule is preferably used.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: October 12, 1999
    Assignee: NEC Corporation
    Inventors: Koji Sakata, Toshihiko Nishiyama, Yuuji Aoki, Satoshi Arai, Kenji Araki
  • Patent number: 4757444
    Abstract: There is provided a vector processor based on a pipeline control method in which a cyclic operation is divided into a plurality of stages and processed. This processor comprises a vector register controller for dividing an operating process into a plurality of fundamental process units and controlling these units, and a phase generator for allowing the vector register controller to time-sharingly make the vector processor operative. This vector processor reads out data from vector registers in which vector elements are stored, operates this data and writes the result of operation into the vector register. With this vector processor, a cyclic operation can be processed in parallel at a high speed without causing a remarkable increase in hardware.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: July 12, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Tomoo Aoyama, Yuuji Aoki, Hiroshi Murayama