Patents by Inventor Gerald M. Davidson

Gerald M. Davidson 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: 8302040
    Abstract: A method and computer program product for modeling a semiconductor transistor device structure having an active device area, a gate structure, and including a conductive line feature connected to the gate structure and disposed above the active device area, the conductive line feature including a conductive landing pad feature disposed near an edge of the active device area in a circuit to be modeled. The method includes determining a distance between an edge defined by the landing pad feature to an edge of the active device area, and, from modeling a lithographic rounding effect of the landing pad feature, determining changes in width of the active device area as a function of the distance between an edge defined by the landing pad feature to an edge of the active device area. From these data, an effective change in active device area width (deltaW adder) is related to the determined distance.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: October 30, 2012
    Assignee: International Business Machines Corporation
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha
  • Patent number: 8296691
    Abstract: A system and method for modeling a semiconductor transistor device structure having a conductive line feature of a designed length connected to a gate of a transistor device in a circuit to be modeled, the transistor including an active device (RX) area over which the gate is formed and over which the conductive line feature extends. The method includes providing an analytical model representation including a function for modeling a lithographic flare effect impacting the active device area width; and, from the modeling function, relating an effective change in active device area width (deltaW adder) as a function of a distance from a defined edge of the RX area. Then, transistor model parameter values in a transistor compact model for the device are updated to include deltaW adder values to be added to a built-in deltaW value.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: October 23, 2012
    Assignee: International Business Machines Corporation
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha
  • Publication number: 20110225562
    Abstract: A method and computer program product for modeling a semiconductor transistor device structure having an active device area, a gate structure, and including a conductive line feature connected to the gate structure and disposed above the active device area, the conductive line feature including a conductive landing pad feature disposed near an edge of the active device area in a circuit to be modeled. The method includes determining a distance between an edge defined by the landing pad feature to an edge of the active device area, and, from modeling a lithographic rounding effect of the landing pad feature, determining changes in width of the active device area as a function of the distance between an edge defined by the landing pad feature to an edge of the active device area. From these data, an effective change in active device area width (deltaW adder) is related to the determined distance.
    Type: Application
    Filed: May 4, 2011
    Publication date: September 15, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha
  • Patent number: 7979815
    Abstract: A method and computer program product for modeling a semiconductor transistor device structure having an active device area, a gate structure, and including a conductive line feature connected to the gate structure and disposed above the active device area, the conductive line feature including a conductive landing pad feature disposed near an edge of the active device area in a circuit to be modeled. The method includes determining a distance between an edge defined by the landing pad feature to an edge of the active device area, and, from modeling a lithographic rounding effect of the landing pad feature, determining changes in width of the active device area as a function of the distance between an edge defined by the landing pad feature to an edge of the active device area. From these data, an effective change in active device area width (deltaW adder) is related to the determined distance.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: July 12, 2011
    Assignee: International Business Machines Corporation
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha
  • Patent number: 7818693
    Abstract: A system and method for modeling a semiconductor transistor device structure having a conductive line feature of a designed length connected to a gate of a transistor device in a circuit to be modeled, the transistor including an active device (RX) area over which the gate is formed and over which the conductive line feature extends. The method includes providing an analytical model representation including a function for modeling a lithographic flare effect impacting the active device area width; and, from the modeling function, relating an effective change in active device area width (deltaW adder) as a function of a distance from a defined edge of the RX area. Then, transistor model parameter values in a transistor compact model for the device are updated to include deltaW adder values to be added to a built-in deltaW value.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: October 19, 2010
    Assignee: International Business Machines Corporation
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha
  • Publication number: 20090177448
    Abstract: A method and computer program product for modeling a semiconductor transistor device structure having an active device area, a gate structure, and including a conductive line feature connected to the gate structure and disposed above the active device area, the conductive line feature including a conductive landing pad feature disposed near an edge of the active device area in a circuit to be modeled. The method includes determining a distance between an edge defined by the landing pad feature to an edge of the active device area, and, from modeling a lithographic rounding effect of the landing pad feature, determining changes in width of the active device area as a function of the distance between an edge defined by the landing pad feature to an edge of the active device area. From these data, an effective change in active device area width (deltaW adder) is related to the determined distance.
    Type: Application
    Filed: January 8, 2008
    Publication date: July 9, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha
  • Publication number: 20090178012
    Abstract: A system and method for modeling a semiconductor transistor device structure having a conductive line feature of a designed length connected to a gate of a transistor device in a circuit to be modeled, the transistor including an active device (RX) area over which the gate is formed and over which the conductive line feature extends. The method includes providing an analytical model representation including a function for modeling a lithographic flare effect impacting the active device area width; and, from the modeling function, relating an effective change in active device area width (deltaW adder) as a function of a distance from a defined edge of the RX area. Then, transistor model parameter values in a transistor compact model for the device are updated to include deltaW adder values to be added to a built-in deltaW value.
    Type: Application
    Filed: January 8, 2008
    Publication date: July 9, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Dureseti Chidambarrao, Gerald M. Davidson, Paul A. Hyde, Judith H. McCullen, Shreesh Narasimha