Patents by Inventor Abani M. Biswas

Abani M. Biswas 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).

  • Method and apparatus for quickly determining the effect of placing an assist feature at a location in a layout
    Patent number: 7721246
    Abstract: One embodiment of the present invention determines the effect of placing an assist feature at a location in a layout. During operation, the system receives a first value which was pre-computed by convolving a model with a layout at an evaluation point, wherein the model models semiconductor manufacturing processes. Next, the system determines a second value by convolving the model with an assist feature, which is assumed to be located at a first location which is in proximity to the evaluation point. The system then determines the effect of placing an assist feature using the first value and the second value. An embodiment of the present invention can be used to determine a substantially optimal location for placing an assist feature in a layout.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: May 18, 2010
    Assignee: Synopsys, Inc.
    Inventors: Jianliang Li, Qiliang Yan, Lawrence S. Melvin, III, Levi D. Barnes, Abani M. Biswas, Alakananda A. Biswas, legal representative