Patents by Inventor Yuang-Cheng Wang

Yuang-Cheng Wang 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).

  • Mask compatible with different steppers
    Patent number: 6190807
    Abstract: A mask includes a piece of reticle glass, a chromium thin film, a pre-alignment mark, a first alignment mark, a second alignment mark, a first identification barcode, and a second identification barcode. There is also a pellicle flame formed on the chromium thin film to prevent the patterning defects caused by particles.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: February 20, 2001
    Assignee: United Integrated Circuits Corp.
    Inventors: Yuang-Cheng Wang, Chii-Ming Shiah