Patents by Inventor Yung-Chang Zhang

Yung-Chang Zhang 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 fabricating two-dimensional ferroelectric nonlinear crystals with periodically inverted domains
    Patent number: 6926770
    Abstract: The present invention relates to a method to control the nucleation and transverse motion of 180° inverted domains in ferroelectric nonlinear crystals. It includes a process composing of a high temperature oxidation of the first metal layer and a pulsed field poling of the second electrodes. The main object of present invention is to provide domain inversion of ferroelectric nonlinear crystals with field control the nucleation and transverse motion of inverted domains and two-dimension nonlinear photonic crystals for time-domain multiple-wave simultaneous lasers and space filter function. Another object of present invention is to provide space-charge effect for screened edge field beneath the metal electrode, The other object of present invention is to provide the constraint of inverted domain nucleation in the oxidized electrode for arbitrarily geometrical form of 2D ferroelectric lattice structure.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: August 9, 2005
    Assignee: National Taiwan University
    Inventors: Lung-Han Peng, Way-Seen Wang, Shu-Mei Tsan, Yi-Chun Shih, Yung-Chang Zhang, Chao-Ching Hsu
  • Method of fabricating two-dimensional ferroelectric nonlinear crystals with periodically inverted domains
    Publication number: 20040192040
    Abstract: The present invention relates to a method to control the nucleation and transverse motion of 180° inverted domains in ferroelectric nonlinear crystals. It includes a process composing of a high temperature oxidation of the first metal layer and a pulsed field poling of the second electrodes. The main object of present invention is to provide domain inversion of ferroelectric nonlinear crystals with field control the nucleation and transverse motion of inverted domains and two-dimension nonlinear photonic crystals for time-domain multiple-wave simultaneous lasers and space filter function. Another object of present invention is to provide space-charge effect for screened edge field beneath the metal electrode, The other object of present invention is to provide the constraint of inverted domain nucleation in the oxidized electrode for arbitrarily geometrical form of 2D ferroelectric lattice structure.
    Type: Application
    Filed: May 9, 2003
    Publication date: September 30, 2004
    Applicant: NATIONAL TAIWAN UNIVERSITY
    Inventors: Lung-Han Peng, Way-Seen Wang, Shu-Mei Tsan, Yi-Chun Shih, Yung-Chang Zhang, Chao-Ching Hsu