Patents by Inventor Chan Hin Kam

Chan Hin Kam 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).

  • Surface acoustic wave device
    Patent number: 7323802
    Abstract: A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (2). The device is operated in alternate-phase mode by connecting the two electrodes to different ends of an electrical source (22). The device is operated in single-phase mode by connecting the two electrodes to the same end of an electrical source.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: January 29, 2008
    Assignees: Acoustical Technologies Singapore Pte. Ltd., Nanyang Technological University
    Inventors: Chan Hin Kam, Yee Loy Lam, Yan Zhou, Shide Cheng, Woon Siong Gan
  • Surface acoustic wave device
    Publication number: 20040183397
    Abstract: A surface acoustic wave device which can generate surface acoustic waves in at least two directions. The device includes a piezoelectric layer, an elastic substrate and an electrode layer which includes two arrays 23 and 24 of linear electrodes with gap regions 25 located between the electrodes. Alternatively, the electrode layer may be patterned as an array of concentric annular strips for the generation of annular surface acoustic waves.
    Type: Application
    Filed: September 22, 2003
    Publication date: September 23, 2004
    Inventors: Chan Hin Kam, Yee Loy Lam, Yan Zhou, Shide Cheng, Woon Siong Gan
  • Surface acoustic wave device
    Publication number: 20040056561
    Abstract: A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (2). The device is operated in alternate-phase mode by connecting the two electrodes to different ends of an electrical source (22). The device is operated in single-phase mode by connecting the two electrodes to the same end of an electrical source.
    Type: Application
    Filed: September 22, 2003
    Publication date: March 25, 2004
    Inventors: Chan Hin Kam, Yee Loy Lam, Yan Zhou, Shide Cheng, Woon Siong Gan