Patents by Inventor Masato Ikuta

Masato Ikuta 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 inspecting piezoelectric ceramic device
    Patent number: 6480010
    Abstract: A piezoelectric ceramic device is heated so that the temperature is increased to a temperature in the vicinity of the maximum temperature at which the device, when the temperature is returned to ordinary temperature, is returned to substantially the same piezoelectric characteristic before heating. In the state that the piezoelectric ceramic device is heated, and the temperature is increased, at least one of the piezoelectric phase characteristic and the impedance characteristic of the piezoelectric ceramic device is measured. The measurement is compared with a standard characteristic, whereby an internal defect of the piezoelectric ceramic device is detected, based on results of the comparison.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: November 12, 2002
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masato Ikuta, Toshinari Tabata, Masao Nishimura
  • Method of inspecting piezoelectric ceramic device
    Publication number: 20020024346
    Abstract: A piezoelectric ceramic device is heated so that the temperature is increased to a temperature in the vicinity of the maximum temperature at which the device, when the temperature is returned to ordinary temperature, is returned to substantially the same piezoelectric characteristic before heating. In the state that the piezoelectric ceramic device is heated, and the temperature is increased, at least one of the piezoelectric phase characteristic and the impedance characteristic of the piezoelectric ceramic device is measured. The measurement is compared with a standard characteristic, whereby an internal defect of the piezoelectric ceramic device is detected, based on results of the comparison.
    Type: Application
    Filed: December 22, 2000
    Publication date: February 28, 2002
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Masato Ikuta, Toshinari Tabata, Masao Nishimura