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).
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Patent number: 9075944Abstract: 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: GrantFiled: June 26, 2013Date of Patent: July 7, 2015Assignee: Mentor Graphics CorporationInventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
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Patent number: 8792080Abstract: 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: GrantFiled: January 27, 2011Date of Patent: July 29, 2014Assignee: International Business Machines CorporationInventors: Brian Christopher Sapp, Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon
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Publication number: 20140071416Abstract: 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: ApplicationFiled: November 15, 2013Publication date: March 13, 2014Inventors: Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon, Brian Christopher Sapp
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Publication number: 20140075396Abstract: 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: ApplicationFiled: November 15, 2013Publication date: March 13, 2014Applicant: International Business Machines CorporationInventors: Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon, Brian Christopher Sapp
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Publication number: 20140075399Abstract: 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: ApplicationFiled: November 15, 2013Publication date: March 13, 2014Inventors: Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon, Brian Christopher Sapp
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Publication number: 20130286370Abstract: 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: ApplicationFiled: June 26, 2013Publication date: October 31, 2013Inventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
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Patent number: 8484586Abstract: 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: GrantFiled: June 14, 2012Date of Patent: July 9, 2013Assignee: Mentor Graphics CorporationInventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
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Publication number: 20120254812Abstract: 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: ApplicationFiled: June 14, 2012Publication date: October 4, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Timothy A. BRUNNER, Stephen E. GRECO, Bernhard R. LIEGL, Hua XIANG
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Patent number: 8239789Abstract: 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: GrantFiled: April 5, 2011Date of Patent: August 7, 2012Assignee: International Business Machines CorporationInventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
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Publication number: 20120194792Abstract: 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: ApplicationFiled: January 27, 2011Publication date: August 2, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Brian Christopher Sapp, Choongyeun Cho, Lawrence A. Clevenger, Laertis Economikos, Bernhard R. Liegl, Kevin S. Petrarca, Roger Allan Quon
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Patent number: 8227180Abstract: 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: GrantFiled: June 13, 2011Date of Patent: July 24, 2012Assignee: International Business Machines CorporationInventors: Timothy Allan Brunner, Sean David Burns, Kuang-Jung Chen, Wu-Song Huang, Kafai Lai, Wai-Kin Li, Bernhard R. Liegl
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Publication number: 20110256486Abstract: 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: ApplicationFiled: June 13, 2011Publication date: October 20, 2011Applicant: International Business Machines CorporationInventors: Timothy A. Brunner, Sean D. Burns, Kuang-Jung Chen, Wu-Song Huang, Kafai Lai, Wai-Kin Li, Bernhard R. Liegl
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Patent number: 8001495Abstract: 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: GrantFiled: April 17, 2008Date of Patent: August 16, 2011Assignee: International Business Machines CorporationInventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
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Publication number: 20090265679Abstract: 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: ApplicationFiled: April 17, 2008Publication date: October 22, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Timothy A. Brunner, Stephen E. Greco, Bernhard R. Liegl, Hua Xiang
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Publication number: 20090208865Abstract: 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: ApplicationFiled: February 19, 2008Publication date: August 20, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Timothy A. Brunner, Sean D. Burns, Kuang-Jung Chen, Wu-Song Huang, Kafai Lai, Wai-Kin Li, Bernhard R. Liegl
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Patent number: 7486097Abstract: 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: GrantFiled: November 29, 2006Date of Patent: February 3, 2009Assignee: International Business Machines CorporationInventor: Bernhard R Liegl
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Publication number: 20070287072Abstract: 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: ApplicationFiled: June 7, 2006Publication date: December 13, 2007Inventor: Bernhard R. Liegl
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Patent number: 7239371Abstract: 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: GrantFiled: October 18, 2005Date of Patent: July 3, 2007Assignee: International Business Machines CorporationInventors: Bernhard R. Liegl, Colin J. Brodsky, Scott J. Bukofsky, Steven J. Holmes
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Patent number: 7176675Abstract: 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: GrantFiled: November 29, 2005Date of Patent: February 13, 2007Assignee: International Business Machines CorporationInventor: Bernhard R. Liegl