Patents by Inventor Hyun Jae JOO

Hyun Jae JOO 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).

  • Publication number: 20230329120
    Abstract: Provided is a piezoelectric single crystal comprising an internal bias electric field, a method of manufacturing the same, and piezoelectric and dielectric application components using the piezoelectric single crystal. The piezoelectric single crystal shows that as a change in each composition of [A] site ions, [B] site ions and [O] site ions from a perovskite type crystal structure ( [A] [B] O3), and oxygen partial-pressure during heat treatment in terms of a manufacturing process are controlled, while maintaining the inherent high dielectric constant and piezoelectric constant, the high internal bias electric field (EI) characteristic essential for the electrical stability of the piezoelectric single crystal is simultaneously satisfied. Therefore, piezoelectric application components and dielectric application components using the piezoelectric single crystal having excellent characteristics can be used in a wide temperature range and operating voltage conditions.
    Type: Application
    Filed: December 8, 2021
    Publication date: October 12, 2023
    Inventors: Ho Yong LEE, Won Sun BAICK, Moon Chan KIM, Hyun Taek OH, Hyun Jae JOO
  • Publication number: 20230247908
    Abstract: Provided is a piezoelectric single crystal-polycrystal ceramic composite, a method of manufacturing the same, and piezoelectric and dielectric application components using the piezoelectric single crystal-polycrystal ceramic composite.
    Type: Application
    Filed: December 8, 2021
    Publication date: August 3, 2023
    Inventors: Ho Yong LEE, Won Sun BAICK, Dong Ho KIM, Hyun Jae JOO