Patents by Inventor Yuane Qiu

Yuane Qiu 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).

  • Pattern decomposition method
    Patent number: 8209656
    Abstract: Some embodiments provide a method for decomposing a region of an integrated circuit (“IC”) design layout into multiple mask layouts. The method identifies a number of sets of geometries in the design layout region that must be collectively assigned to the multiple mask layouts. The method assigns the geometries in a first group of collectively-assigned sets to different mask layouts without splitting any of the geometries. The method assigns the geometries in a second group of the collectively-assigned sets to different mask layouts in such a way so as to minimize the number of splits in the geometries of the second group.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: June 26, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Xiaojun Wang, Yuane Qiu, Prasanti Uppaluri, Judy Huckabay, Tianhao Zhang