Patents by Inventor Chisato OJIMA

Chisato OJIMA 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 vibrator element, piezoelectric vibrator, oscillator, and method of manufacturing piezoelectric vibrator element
    Patent number: 11831296
    Abstract: There is provided a piezoelectric vibrator element which is excellent in vibration characteristics, high in quality, and capable of suppressing a frequency fluctuation after a frequency adjustment. The piezoelectric vibrator element is provided with a piezoelectric plate having a pair of vibrating arm parts, an electrode film disposed on obverse and reverse surfaces of the piezoelectric plate, and weight metal films for a frequency adjustment disposed on the electrode film at the obverse surface side in the vibrating arm parts. The reverse surface of the vibrating arm part has a reverse side exposure part from which the piezoelectric plate is exposed. The obverse surface of the vibrating arm part has an obverse side exposure part from which the weight metal film and the electrode film are removed, and from which the piezoelectric plate is exposed.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: November 28, 2023
    Assignee: SII CRYSTAL TECHNOLOGY INC.
    Inventors: Takashi Kobayashi, Motoki Shibuya, Chisato Ojima, Tomohiro Momose
  • PIEZOELECTRIC VIBRATOR ELEMENT, PIEZOELECTRIC VIBRATOR, OSCILLATOR, AND METHOD OF MANUFACTURING PIEZOELECTRIC VIBRATOR ELEMENT
    Publication number: 20220173717
    Abstract: There is provided a piezoelectric vibrator element which is excellent in vibration characteristics, high in quality, and capable of suppressing a frequency fluctuation after a frequency adjustment. The piezoelectric vibrator element is provided with a piezoelectric plate having a pair of vibrating arm parts, an electrode film disposed on obverse and reverse surfaces of the piezoelectric plate, and weight metal films for a frequency adjustment disposed on the electrode film at the obverse surface side in the vibrating arm parts. The reverse surface of the vibrating arm part has a reverse side exposure part from which the piezoelectric plate is exposed. The obverse surface of the vibrating arm part has an obverse side exposure part from which the weight metal film and the electrode film are removed, and from which the piezoelectric plate is exposed.
    Type: Application
    Filed: November 24, 2021
    Publication date: June 2, 2022
    Inventors: Takashi KOBAYASHI, Motoki SHIBUYA, Chisato OJIMA, Tomohiro MOMOSE