Patents by Inventor Radu-Christian Ionescu

Radu-Christian Ionescu 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).

  • Optimizing lithography masks for VLSI chip design
    Patent number: 9158876
    Abstract: In one embodiment, a computer-implemented method includes accessing mask input data. The mask input data includes a mathematical representation of a mask in a mask representation space, where the mask is configured to create an integrated circuit microprocessor. A set of values is obtained based on a derivative of the mask input data. The set of values is optimized, by a computer processor, in a derivative domain to obtain optimized mask data. The optimized mask data is transformed into the mask representation space to obtain printable mask output data.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 13, 2015
    Assignee: International Business Machines Corporation
    Inventors: Stefan Apostol, Paul Hurley, Radu-Christian Ionescu
  • OPTIMIZING LITHOGRAPHY MASKS FOR VLSI CHIP DESIGN
    Publication number: 20150149971
    Abstract: In one embodiment, a computer-implemented method includes accessing mask input data. The mask input data includes a mathematical representation of a mask in a mask representation space, where the mask is configured to create an integrated circuit microprocessor. A set of values is obtained based on a derivative of the mask input data. The set of values is optimized, by a computer processor, in a derivative domain to obtain optimized mask data. The optimized mask data is transformed into the mask representation space to obtain printable mask output data.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 28, 2015
    Applicant: International Business Machines Corporation
    Inventors: Stefan Apostol, Paul Hurley, Radu-Christian Ionescu