Patents by Inventor Kouji EITOKU

Kouji EITOKU 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).

  • Piezoelectric substrate, assembly, liquid discharge head, and recording device, each using piezoelectric substrate
    Patent number: 9969160
    Abstract: The present invention aims at providing a piezoelectric substrate with high joining strength between an electrode of the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate-shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes and a second electrode disposed on one main surface of the piezoelectric ceramic layer, a third electrode disposed on the other main surface of the piezoelectric ceramic layer so as to oppose to the first electrodes, and a through-conductor electrically connecting the second electrode and the third electrode. The second electrode includes a connection portion connected to the through-conductor, and a small-width portion having a smaller width than the connection portion when the piezoelectric substrate is viewed from above. The second electrode and the outside are electrically connected to each other at the small-width portion.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: May 15, 2018
    Assignee: KYOCERA CORPORATION
    Inventors: Yoshihiro Yuu, Kouji Eitoku, Kosei Horiuchi
  • PIEZOELECTRIC SUBSTRATE, ASSEMBLY, LIQUID DISCHARGE HEAD, AND RECORDING DEVICE, EACH USING PIEZOELECTRIC SUBSTRATE
    Publication number: 20160332446
    Abstract: The present invention aims at providing a piezoelectric substrate with high joining strength between an electrode of the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate-shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes and a second electrode disposed on one main surface of the piezoelectric ceramic layer, a third electrode disposed on the other main surface of the piezoelectric ceramic layer so as to oppose to the first electrodes, and a through-conductor electrically connecting the second electrode and the third electrode. The second electrode includes a connection portion connected to the through-conductor, and a small-width portion having a smaller width than the connection portion when the piezoelectric substrate is viewed from above. The second electrode and the outside are electrically connected to each other at the small-width portion.
    Type: Application
    Filed: December 25, 2014
    Publication date: November 17, 2016
    Applicant: KYOCERA Corporation
    Inventors: Yoshihiro YUU, Kouji EITOKU, Kosei HORIUCHI