Patents by Inventor Yuki Iitsuka

Yuki Iitsuka 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).

  • Method of manufacturing piezoelectric element, method of manufacturing oscillatory wave motor, method of manufacturing optical apparatus, and method of manufacturing electronic apparatus
    Patent number: 11450801
    Abstract: Provided is a method of manufacturing a piezoelectric element in which, at a time when the piezoelectric element is manufactured, a piezoelectric material is prevented from being exposed to a temperature higher than a Curie temperature thereof to be depolarized, to thereby significantly decrease piezoelectric properties. The method of manufacturing a piezoelectric element includes a first step of arranging a plurality of electrodes on a piezoelectric material, electrically short-circuiting two or more electrodes of the plurality of electrodes, and subjecting the piezoelectric material to heat treatment, and a second step of, after the first step, electrically opening the short circuit of the two or more electrodes at a time when a temperature of the piezoelectric material decreases to less than a temperature of the piezoelectric material at a time of the heat treatment.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: September 20, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akira Uebayashi, Tatsuo Furuta, Kanako Oshima, Takayuki Watanabe, Jumpei Hayashi, Satoshi Fujita, Yuki Iitsuka
  • METHOD OF MANUFACTURING PIEZOELECTRIC ELEMENT, METHOD OF MANUFACTURING OSCILLATORY WAVE MOTOR, METHOD OF MANUFACTURING OPTICAL APPARATUS, AND METHOD OF MANUFACTURING ELECTRONIC APPARATUS
    Publication number: 20200119257
    Abstract: Provided is a method of manufacturing a piezoelectric element in which, at a time when the piezoelectric element is manufactured, a piezoelectric material is prevented from being exposed to a temperature higher than a Curie temperature thereof to be depolarized, to thereby significantly decrease piezoelectric properties. The method of manufacturing a piezoelectric element includes a first step of arranging a plurality of electrodes on a piezoelectric material, electrically short-circuiting two or more electrodes of the plurality of electrodes, and subjecting the piezoelectric material to heat treatment, and a second step of, after the first step, electrically opening the short circuit of the two or more electrodes at a time when a temperature of the piezoelectric material decreases to less than a temperature of the piezoelectric material at a time of the heat treatment.
    Type: Application
    Filed: March 1, 2018
    Publication date: April 16, 2020
    Inventors: Akira Uebayashi, Tatsuo Furuta, Kanako Oshima, Takayuki Watanabe, Jumpei Hayashi, Satoshi Fujita, Yuki Iitsuka