Patents by Inventor Rani Narayan

Rani Narayan 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).

  • Publication number: 20140019931
    Abstract: Approaches are provided for fixing pin mismatches from swapping library cells in layout migration. Specifically, a method is provided that includes collecting information about a first technology pin from a library cell in a first technology. The method further includes swapping the library cell in the first technology with a library cell in a second technology. The method further includes collecting information about a second technology pin from the library cell in the second technology. The method further includes building a pin-mapping table that is configured to map the first technology pin to the second technology pin. The method further includes scaling a layout from the first technology to the second technology. The method further includes modifying the layout based on the pin-mapping table to match the at least one first technology pin to the at least one second technology pin while satisfying ground rules of the second technology.
    Type: Application
    Filed: July 11, 2012
    Publication date: January 16, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kevin W. MCCULLEN, Matthew T. GUZOWSKI, Rani NARAYAN, Xiaoping TANG, Xin YUAN
  • Patent number: 8627247
    Abstract: Approaches are provided for fixing pin mismatches from swapping library cells in layout migration. Specifically, a method is provided that includes collecting information about a first technology pin from a library cell in a first technology. The method further includes swapping the library cell in the first technology with a library cell in a second technology. The method further includes collecting information about a second technology pin from the library cell in the second technology. The method further includes building a pin-mapping table that is configured to map the first technology pin to the second technology pin. The method further includes scaling a layout from the first technology to the second technology. The method further includes modifying the layout based on the pin-mapping table to match the at least one first technology pin to the at least one second technology pin while satisfying ground rules of the second technology.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: January 7, 2014
    Assignee: International Business Machines Corporation
    Inventors: Kevin W. McCullen, Matthew T. Guzowski, Rani Narayan, Xiaoping Tang, Xin Yuan
  • Patent number: 8464189
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. The invention implements a minimum layout perturbation approach that addresses the RDR requirements. The invention also solves the problem of inserting dummy shapes where required, and extending the lengths of the critical shapes and/or the dummy shapes to meet ‘edge coverage’ requirements.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: June 11, 2013
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Allen, Cam V. Endicott, Fook-Luen Heng, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Robert F. Walker, Xin Yuan
  • Publication number: 20120233576
    Abstract: Method, system, computer, etc., embodiments receive an original integrated circuit design into a computerized device. The methods herein automatically replace at least some of the original cells within the original integrated circuit design with replacement cells using the computerized device. Each of the replacement cells has an initial cell size that is unassociated with any specific design size. The methods herein automatically change the original design size of the integrated circuit design to a changed design size, and automatically individually change the initial cell size of each of the replacement cells to different sizes. At least two different replacement cells are changed from the initial cell size by different size reduction amounts based on different amounts of space required within the changed design size for each of the replacement cells.
    Type: Application
    Filed: March 9, 2011
    Publication date: September 13, 2012
    Applicant: International Business Machines Corporation
    Inventors: Geoffrey R. Barrows, Derick G. Behrends, William J. Craig, Michael S. Gray, Matthew T. Guzowski, Kevin W. McCullen, Rani Narayan, Robert F. Walker
  • Publication number: 20100185997
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. The invention implements a minimum layout perturbation approach that addresses the RDR requirements. The invention also solves the problem of inserting dummy shapes where required, and extending the lengths of the critical shapes and/or the dummy shapes to meet ‘edge coverage’ requirements.
    Type: Application
    Filed: March 18, 2010
    Publication date: July 22, 2010
    Applicant: International Business Machines Corporation
    Inventors: Robert J. Allen, Cam V. Endicott, Fook-Luen Heng, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Robert F. Walker, Xin Yuan
  • Patent number: 7761821
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. The invention implements a minimum layout perturbation approach that addresses the RDR requirements. The invention also solves the problem of inserting dummy shapes where required, and extending the lengths of the critical shapes and/or the dummy shapes to meet ‘edge coverage’ requirements.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: July 20, 2010
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Allen, Cam V. Endicott, Fook-Luen Heng, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Robert F. Walker, Xin Yuan
  • Patent number: 7610565
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. Also, a method, system and program product for migrating an integrated circuit design from a source technology without RDR to a target technology with RDR in which space may be reserved for late insertion of a feature and in which migration first occurs in a primary compaction direction having less tolerant ground rules.
    Type: Grant
    Filed: April 9, 2007
    Date of Patent: October 27, 2009
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Allen, Cam V. Endicott, Fook-Luen Heng, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Robert F. Walker, Xin Yuan
  • Patent number: 7568173
    Abstract: Methods of independently migrating a hierarchical design are disclosed. A method for migrating a macro in an integrated circuit comprises: determining an interface strategy between a base cell in the macro and the macro, the base cell including an interface element involved in the interface strategy; migrating the base cell independently with respect to the macro based on the interface strategy; initially scaling the macro; swapping the migrated base cell into the macro; and legalizing content of the initially scaled macro.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: July 28, 2009
    Assignee: International Business Machines Corporation
    Inventors: Veit Gernhoefer, Matthew T. Guzowski, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Stephen L. Runyon, Leon J. Sigal, Robert F. Walker, Pieter J. Woeltgens, Xiaoyun K. Wu, Xin Yuan
  • Publication number: 20080313581
    Abstract: Methods of independently migrating a hierarchical design are disclosed. A method for migrating a macro in an integrated circuit comprises: determining an interface strategy between a base cell in the macro and the macro, the base cell including an interface element involved in the interface strategy; migrating the base cell independently with respect to the macro based on the interface strategy; initially scaling the macro; swapping the migrated base cell into the macro; and legalizing content of the initially scaled macro.
    Type: Application
    Filed: June 14, 2007
    Publication date: December 18, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Veit Gernhoefer, Matthew T. Guzowski, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Stephen L. Runyon, Leon J. Sigal, Robert F. Walker, Pieter J. Woeltgens, Xiaoyun K. Wu, Xin Yuan
  • Patent number: 7454721
    Abstract: A method, apparatus, and computer program product for optimizing the layout of an integrated circuit design. Base ground rules and recommended ground rules are prioritized according to the impact they have on the yield of the integrated circuit design. The layout is optimized according to the prioritized base ground rules and recommended ground rules.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: November 18, 2008
    Assignee: International Business Machines Corporation
    Inventors: Jason D. Hibbeler, Rani Narayan, Robert F. Walker
  • Publication number: 20070277129
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. The invention implements a minimum layout perturbation approach that addresses the RDR requirements. The invention also solves the problem of inserting dummy shapes where required, and extending the lengths of the critical shapes and/or the dummy shapes to meet ‘edge coverage’ requirements.
    Type: Application
    Filed: August 13, 2007
    Publication date: November 29, 2007
    Inventors: Robert Allen, Cam Endicott, Fook-Luen Heng, Jason Hibbeler, Kevin McCullen, Rani Narayan, Robert Walker, Xin Yuan
  • Patent number: 7302651
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. The invention implements a minimum layout perturbation approach that addresses the RDR requirements. The invention also solves the problem of inserting dummy shapes where required, and extending the lengths of the critical shapes and/or the dummy shapes to meet ‘edge coverage’ requirements.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: November 27, 2007
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Allen, Cam V. Endicott, Fook-Luen Heng, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Robert F. Walker, Xin Yuan
  • Publication number: 20070245283
    Abstract: A method comprises extracting a hierarchical grid constraint set and modeling one or more critical objects of at least one cell as a variable set. The method further comprises solving a linear programming problem based on the hierarchical grid constraint set with the variable set to provide initial locations of the critical objects of the at least one cell and determining target on-grid locations of the one or more critical objects in the at least one cell using the results of the linear programming solution.
    Type: Application
    Filed: April 14, 2006
    Publication date: October 18, 2007
    Inventors: Robert Allen, Michael Gray, Fuok-Luen Heng, Jason Hibbeler, Kevin McCullen, Rani Narayan, Robert Walker
  • Publication number: 20070198961
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. Also, a method, system and program product for migrating an integrated circuit design from a source technology without RDR to a target technology with RDR in which space may be reserved for late insertion of a feature and in which migration first occurs in a primary compaction direction having less tolerant ground rules.
    Type: Application
    Filed: April 9, 2007
    Publication date: August 23, 2007
    Applicant: International Business Machines Corporation
    Inventors: Robert Allen, Cam Endicott, Fook-Luen Heng, Jason Hibbeler, Kevin McCullen, Rani Narayan, Robert Walker, Xin Yuan
  • Patent number: 7257783
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. Also, a method, system and program product for migrating an integrated circuit design from a source technology without RDR to a target technology with RDR in which space may be reserved for late insertion of a feature and in which migration first occurs in a primary compaction direction having less tolerant ground rules.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: August 14, 2007
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Allen, Cam V. Endicott, Fook-Luen Heng, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan, Robert F. Walker, Xin Yuan
  • Publication number: 20060101356
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. The invention implements a minimum layout perturbation approach that addresses the RDR requirements. The invention also solves the problem of inserting dummy shapes where required, and extending the lengths of the critical shapes and/or the dummy shapes to meet ‘edge coverage’ requirements.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 11, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert Allen, Cam Endicott, Fook-Luen Heng, Jason Hibbeler, Kevin McCullen, Rani Narayan, Robert Walker, Xin Yuan
  • Publication number: 20060101357
    Abstract: A method, system and program product for migrating an integrated circuit (IC) design from a source technology without radical design restrictions (RDR) to a target technology with RDR, are disclosed. Also, a method, system and program product for migrating an integrated circuit design from a source technology without RDR to a target technology with RDR in which space may be reserved for late insertion of a feature and in which migration first occurs in a primary compaction direction having less tolerant ground rules.
    Type: Application
    Filed: December 9, 2004
    Publication date: May 11, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert Allen, Cam Endicott, Fook-Luen Heng, Jason Hibbeler, Kevin McCullen, Rani Narayan, Robert Walker, Xin Yuan
  • Publication number: 20060085768
    Abstract: Methods, systems and program products are disclosed for selectively scaling an integrated circuit (IC) design: by layer, by unit, or by ground rule, or a combination of these. The selective scaling technique can be applied in a feedback loop with the manufacturing system with process and yield feedback, during the life of a design, to increase yield in early processes in such a way that hierarchy is preserved. The invention removes the need to involve designers in improving yield where new technologies such as maskless fabrication are implemented.
    Type: Application
    Filed: October 15, 2004
    Publication date: April 20, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Fook-Luen Heng, Jason Hibbeler, Kevin McCullen, Rani Narayan, Stephen Runyon, Robert Walker
  • Patent number: 6189132
    Abstract: A method of modifying a layout of a plurality of objects in accordance with a plurality of predetermined criteria is presented. An objective function is defined for measuring a location perturbation and a separation perturbation of the objects in the layout. A linear system is defined using linear constraints in terms of design rules and the objective function to describe separations between layout objects. The linear system is solved to simultaneously remove violations of the design rules, and shapes and positions of objects in the layout are modified in accordance with the solution of the linear system such that a total perturbation of the objects in the layout is reduced. A system for implementing the present invention is also presented.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: February 13, 2001
    Assignee: International Business Machines Corporation
    Inventors: Fook-Luen Heng, Zhan Chen, Gustavo E. Tellez, John Cohn, Rani Narayan