Patents by Inventor Chiaki Arii

Chiaki Arii 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 ceramics, piezoelectric element, and electronic apparatus
    Patent number: 11647677
    Abstract: Provided is a piezoelectric ceramics including crystal grains each including: a first region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at an asymmetrical position; and a second region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at a symmetrical position, and that is present inside the first region, wherein a ratio of a cross-sectional area of the second region to a cross-sectional area of the piezoelectric ceramics is 0.1% or less.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: May 9, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akira Uebayashi, Kanako Oshima, Makoto Kubota, Tatsuo Furuta, Yasushi Shimizu, Mikio Shimada, Chiaki Arii
  • PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, AND ELECTRONIC APPARATUS
    Publication number: 20190378970
    Abstract: Provided is a piezoelectric ceramics including crystal grains each including: a first region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at an asymmetrical position; and a second region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at a symmetrical position, and that is present inside the first region, wherein a ratio of a cross-sectional area of the second region to a cross-sectional area of the piezoelectric ceramics is 0.1% or less.
    Type: Application
    Filed: May 29, 2019
    Publication date: December 12, 2019
    Inventors: Akira Uebayashi, Kanako Oshima, Makoto Kubota, Tatsuo Furuta, Yasushi Shimizu, Mikio Shimada, Chiaki Arii