Patents by Inventor Bernhard R. Liegl

Bernhard R. Liegl 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: 9075944
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: July 7, 2015
    Assignee: Mentor Graphics Corporation
    Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
  • Patent number: 8792080
    Abstract: A method and system to predict lithography focus error using chip topography data is disclosed. The chip topography data may be measured or simulated topography data. A plane is best fitted to the topography data, and residuals are computed. The residuals are then used to make a prediction regarding the focus error. The density ratio of metal to dielectric may also be used as a factor in determining the predicted focus error.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: July 29, 2014
    Assignee: International Business Machines Corporation
    Inventors: Brian Christopher Sapp, Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon
  • Publication number: 20140075396
    Abstract: A method and system to predict lithography focus error using chip topography data is disclosed. The chip topography data may be measured or simulated topography data. A plane is best fitted to the topography data, and residuals are computed. The residuals are then used to make a prediction regarding the focus error. The density ratio of metal to dielectric may also be used as a factor in determining the predicted focus error.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Applicant: International Business Machines Corporation
    Inventors: Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon, Brian Christopher Sapp
  • Publication number: 20140075399
    Abstract: A method and system to predict lithography focus error using chip topography data is disclosed. The chip topography data may be measured or simulated topography data. A plane is best fitted to the topography data, and residuals are computed. The residuals are then used to make a prediction regarding the focus error. The density ratio of metal to dielectric may also be used as a factor in determining the predicted focus error.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Inventors: Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon, Brian Christopher Sapp
  • Publication number: 20140071416
    Abstract: A method and system to predict lithography focus error using chip topography data is disclosed. The chip topography data may be measured or simulated topography data. A plane is best fitted to the topography data, and residuals are computed. The residuals are then used to make a prediction regarding the focus error. The density ratio of metal to dielectric may also be used as a factor in determining the predicted focus error.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Inventors: Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon, Brian Christopher Sapp
  • Publication number: 20130286370
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Application
    Filed: June 26, 2013
    Publication date: October 31, 2013
    Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
  • Patent number: 8484586
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: July 9, 2013
    Assignee: Mentor Graphics Corporation
    Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
  • Publication number: 20120254812
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Application
    Filed: June 14, 2012
    Publication date: October 4, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Timothy A. BRUNNER, Stephen E. GRECO, Bernhard R. LIEGL, Hua XIANG
  • Patent number: 8239789
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: August 7, 2012
    Assignee: International Business Machines Corporation
    Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
  • Publication number: 20120194792
    Abstract: A method and system to predict lithography focus error using chip topography data is disclosed. The chip topography data may be measured or simulated topography data. A plane is best fitted to the topography data, and residuals are computed. The residuals are then used to make a prediction regarding the focus error. The density ratio of metal to dielectric may also be used as a factor in determining the predicted focus error.
    Type: Application
    Filed: January 27, 2011
    Publication date: August 2, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brian Christopher Sapp, Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon
  • Patent number: 8227180
    Abstract: An anti-reflective coating material, a microelectronic structure that includes an anti-reflective coating layer formed from the anti-reflective coating material and a related method for exposing a resist layer located over a substrate while using the anti-reflective coating layer provide for attenuation of secondary reflected vertical alignment beam radiation when aligning the substrate including the resist layer located thereover. Such enhanced vertical alignment provides for improved dimensional integrity of a patterned resist layer formed from the resist layer, as well as additional target layers that may be fabricated while using the resist layer as a mask.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: July 24, 2012
    Assignee: International Business Machines Corporation
    Inventors: Timothy Allan Brunner, Sean David Burns, Kuang-Jung Chen, Wu-Song Huang, Kafai Lai, Wai-Kin Li, Bernhard R. Liegl
  • Publication number: 20110256486
    Abstract: An anti-reflective coating material, a microelectronic structure that includes an anti-reflective coating layer formed from the anti-reflective coating material and a related method for exposing a resist layer located over a substrate while using the anti-reflective coating layer provide for attenuation of secondary reflected vertical alignment beam radiation when aligning the substrate including the resist layer located thereover. Such enhanced vertical alignment provides for improved dimensional integrity of a patterned resist layer formed from the resist layer, as well as additional target layers that may be fabricated while using the resist layer as a mask.
    Type: Application
    Filed: June 13, 2011
    Publication date: October 20, 2011
    Applicant: International Business Machines Corporation
    Inventors: Timothy A. Brunner, Sean D. Burns, Kuang-Jung Chen, Wu-Song Huang, Kafai Lai, Wai-Kin Li, Bernhard R. Liegl
  • Patent number: 8001495
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: August 16, 2011
    Assignee: International Business Machines Corporation
    Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
  • Publication number: 20090265679
    Abstract: A system and method is provided which predicts problematic areas for lithography in a circuit design, and more specifically, which uses modeling data from a modeling tool to accurately predict problematic lithographic areas. The method includes identifying surface heights of plurality of tiles of a modeled wafer, and mathematically mimicking a lithographic tool to determine best planes of focus for exposure for the plurality of tiles.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 22, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
  • Publication number: 20090208865
    Abstract: An anti-reflective coating material, a microelectronic structure that includes an anti-reflective coating layer formed from the anti-reflective coating material and a related method for exposing a resist layer located over a substrate while using the anti-reflective coating layer provide for attenuation of secondary reflected vertical alignment beam radiation when aligning the substrate including the resist layer located thereover. Such enhanced vertical alignment provides for improved dimensional integrity of a patterned resist layer formed from the resist layer, as well as additional target layers that may be fabricated while using the resist layer as a mask.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 20, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Timothy A. Brunner, Sean D. Burns, Kuang-Jung Chen, Wu-Song Huang, Kafai Lai, Wai-Kin Li, Bernhard R. Liegl
  • Patent number: 7486097
    Abstract: The invention relates to a method for determining processing image induced defects in the manufacture of semiconductor products such as wafers by analyzing the circuit design of the product mask and modifying a conventional test defect structure to mimic the product mask to incorporate one or more isolated or other features including product mask circuit features likely to cause processing image induced defects into the test defect structure.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: February 3, 2009
    Assignee: International Business Machines Corporation
    Inventor: Bernhard R Liegl
  • Publication number: 20070287072
    Abstract: Methods of forming and using a mask having a mask substrate including a non-planar surface are disclosed. The non-planar surface includes at least one portion having a depth configured to compensate for topography on the surface of a semiconductor wafer.
    Type: Application
    Filed: June 7, 2006
    Publication date: December 13, 2007
    Inventor: Bernhard R. Liegl
  • Patent number: 7239371
    Abstract: A method and apparatus are provided for improving the leveling and, consequently, the focusing of a substrate such as a wafer during the photolithography imaging procedure of a semiconductor manufacturing process. The invention performs a pre-scan of the wafer's topography and assigns importance values to different regions of the wafer surface. Exposure focus instructions are calculated based on the topography and importance values of the different regions and the wafer is then scanned and imaged based on the calculated exposure focus instructions.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: July 3, 2007
    Assignee: International Business Machines Corporation
    Inventors: Bernhard R. Liegl, Colin J. Brodsky, Scott J. Bukofsky, Steven J. Holmes
  • Patent number: 7176675
    Abstract: The invention relates to a method for determining processing image induced defects in the manufacture of semiconductor products such as wafers by analyzing the circuit design of the product mask and modifying a conventional test defect structure to mimic the product mask to incorporate one or more isolated or other features including product mask circuit features likely to cause processing image induced defects into the test defect structure.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: February 13, 2007
    Assignee: International Business Machines Corporation
    Inventor: Bernhard R. Liegl