Patents by Inventor Beh Chee Yang

Beh Chee Yang 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).

  • Optical memories using electron trapping material
    Patent number: 6118684
    Abstract: A three-dimensional memory based on the electron trapping materials, comprising at least two thin film layers of different or the same electron trapping materials for storing information in the form of the trapped charges and releasing information in the form of light energy, each of the thin film layers of the electron trapping materials being sandwiched between a pair of transparent electrodes. The thin film layer itself is a multiple layer of one or more than two types of electron trapping materials in which the impurity atoms are modulation doped with predetermined modulation profiles. The page-by-page addressing is achieved by applying a suitable voltage to the information to be addressed. Separate control of writing and reading processes is made possible by varying the voltage polarity.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: September 12, 2000
    Inventors: Wu Yihong, Chong Tow Chong, Beh Chee Yang