Patents by Inventor Li J. Song

Li J. Song 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).

  • Patent number: 8312406
    Abstract: A method, system, and computer program product are disclosed for performing RC extraction. The present approach can consider multiple types of manufacturing processes, and allows location-based prediction data to be used in the context of net-based analysis. RC extraction can be more accurately performed based upon net-specific top and bottom adjustments to thickness prediction that are location-based. The net-based prediction data can be used for other purposes as well, such as to perform electrical hotspot analysis, to visually display physical properties of the nets, or allow queries for other data analysis purposes.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: November 13, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Li J. Song, Taber Smith, Hao Jl, Zhan-Zhong Yao
  • Patent number: 8219944
    Abstract: A method, system, and computer program product are disclosed for performing RC extraction from the perspective of the block level. A translation mechanism is employed to convert from a full-chip design domain to a block-level design domain. This allows model-based prediction results to be used in the early design implementation flow when parasitic RC and timing extractions are performed, where the model-based prediction results relate to predictions of manufacturing variations such as thickness and topography.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: July 10, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Li J. Song, Zhan-Zhong Yao, Rachid Salik, Hao Ji, Taber Smith
  • Patent number: 8136068
    Abstract: Disclosed are a method, a system, and a computer program product for implementing compact manufacturing model during various stages of electronic circuit designs. In some embodiments, the method or the system receives or identifies physics based data. In some embodiments, the method or the system receives or identifies the physics based data for the corresponding manufacturing process by using the golden manufacturing process model. In some embodiments, the method or the system uses the physics based data to fine tune, modify, or adjust the golden manufacturing process model. In some embodiments, the method or the system invokes the just-right module. In some embodiments, the method or the system implements the compact manufacturing model and the correct-by-design module and provides guidelines for the various stages of the electronic circuit design.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: March 13, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Li J. Song, Srini Doddi, Emmanuel Drego, Nickhil Jakatdar
  • Publication number: 20100325595
    Abstract: A method, system, and computer program product are disclosed for performing RC extraction. The present approach can consider multiple types of manufacturing processes, and allows location-based prediction data to be used in the context of net-based analysis. RC extraction can be more accurately performed based upon net-specific top and bottom adjustments to thickness prediction that are location-based. The net-based prediction data can be used for other purposes as well, such as to perform electrical hotspot analysis, to visually display physical properties of the nets, or allow queries for other data analysis purposes.
    Type: Application
    Filed: June 22, 2009
    Publication date: December 23, 2010
    Applicant: Cadence Design Systems, Inc.
    Inventors: Li J. SONG, Taber SMITH, Hao JI, Zhan-Zhong YAO
  • Publication number: 20100162188
    Abstract: A method, system, and computer program product are disclosed for performing RC extraction from the perspective of the block level. A translation mechanism is employed to convert from a full-chip design domain to a block-level design domain. This allows model-based prediction results to be used in the early design implementation flow when parasitic RC and timing extractions are performed, where the model-based prediction results relate to predictions of manufacturing variations such as thickness and topography.
    Type: Application
    Filed: June 23, 2009
    Publication date: June 24, 2010
    Applicant: Cadence Design Systems, Inc.
    Inventors: Li J. SONG, Zhan-Zhong Yao, Rachid Salik, Hao Jl, Taber Smith
  • Publication number: 20100083200
    Abstract: Disclosed are a method, a system, and a computer program product for implementing compact manufacturing model during various stages of electronic circuit designs. In some embodiments, the method or the system receives or identifies physics based data. In some embodiments, the method or the system receives or identifies the physics based data for the corresponding manufacturing process by using the golden manufacturing process model. In some embodiments, the method or the system uses the physics based data to fine tune, modify, or adjust the golden manufacturing process model. In some embodiments, the method or the system invokes the just-right module. In some embodiments, the method or the system implements the compact manufacturing model and the correct-by-design module and provides guidelines for the various stages of the electronic circuit design.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: Cadence Design Systems, Inc.
    Inventors: Li J. Song, Srini Doddi, Emmanuel Drege, Nickhil Jakatdar
  • Patent number: 7089516
    Abstract: The present invention relates to techniques for measuring integrated circuit interconnect process parameters. The techniques are applicable to any non-ideally shaped interconnects made from any type of conductive materials. Test structures are fabricated within an integrated circuit. Non-destructive electrical measurements are taken from the test structures to determine coupling capacitances associated with the test structures. A field solver uses the initial process parameters to determine design coupling capacitances. An optimizer then uses the measured coupling capacitances and the design coupling capacitances to determine the interconnect process parameters.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: August 8, 2006
    Assignee: Cadence Design Systems, Inc.
    Inventors: Narain D. Arora, Li J. Song, Aki Fujimura