Patents by Inventor Junji Hirohashi

Junji Hirohashi 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).

  • Ferroelectric substrate period polarization structure manufacturing method
    Publication number: 20050084199
    Abstract: A ferroelectric substrate periodically poled structure manufacturing method for periodically reversing the polarization direction by applying an electric field between electrodes on the both surfaces of the ferroelectric substrate. An electric field is applied to a portion between the electrodes in a direction different from the spontaneous direction. Next, a step of applying the electric field in the same direction as the spontaneous polarization is performed at least once. After this, the electric field is applied in the direction different from the spontaneous polarization.
    Type: Application
    Filed: February 21, 2003
    Publication date: April 21, 2005
    Inventors: Junji Hirohashi, Shiro Shichijyo