Patents by Inventor Hong Yu Chu

Hong Yu Chu 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 for preparing a periodically poled structure
    Patent number: 7486432
    Abstract: A method for preparing a periodically poled structure according to this aspect of the present invention comprises the steps of providing a ferroelectric substrate and performing a poling process by applying a poling current to at least one portion of the ferroelectric substrate according to a current waveform. The current waveform include a major phase and a tailed phase accompanying the major phase; the major phase has at least one peak current (Ip) and terminates when the current drops substantially equal to Ip/e, and the charge delivered to the portion of the ferroelectric substrate during the major phase is larger than that delivered during the tailed phase. The nucleation phase is configured to generate nucleation sites in the portion of the ferroelectric substrate and the spreading phase is configured to increase the size of the nucleation sites.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: February 3, 2009
    Assignee: HC Photonics Corp.
    Inventors: Hong Yu Chu, Joseph Lung Chang Ho, Tze Chia Lin, Ming Hsien Chou
  • Method For Preparing A Periodically Poled Structure
    Publication number: 20080218846
    Abstract: A method for preparing a periodically poled structure according to this aspect of the present invention comprises the steps of providing a ferroelectric substrate and performing a poling process by applying a poling current to at least one portion of the ferroelectric substrate according to a current waveform. The current waveform include a major phase and a tailed phase accompanying the major phase; the major phase has at least one peak current (Ip) and terminates when the current drops substantially equal to Ip/e, and the charge delivered to the portion of the ferroelectric substrate during the major phase is larger than that delivered during the tailed phase. The nucleation phase is configured to generate nucleation sites in the portion of the ferroelectric substrate and the spreading phase is configured to increase the size of the nucleation sites.
    Type: Application
    Filed: March 8, 2007
    Publication date: September 11, 2008
    Applicant: HC Photonics Corp.
    Inventors: Hong Yu Chu, Joseph Lung Chang Ho, Tze Chia Lin, Ming Hsien Chou