Patents by Inventor Hyeong-su Woo

Hyeong-su Woo 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).

  • Field emission cathode and method for manufacturing a field emission cathode
    Patent number: 5481156
    Abstract: A field emission cathode and a method of manufacturing a field emission cathode, wherein a primitive tip is formed under a first thermal oxide layer, and a nitride layer is formed on the surface of the first thermal oxide layer covering the primitive tip so that only the lower portion of the tip is oxidized without the upper portion of the tip being oxidized by a second thermal oxidation process. The method can attain a constant and controllable tip height.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: January 2, 1996
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Jong-deuk Lee, Hyeong-su Woo, Sun-jeong Choi, Gang-ok Lee