Patents by Inventor Sriram Madhavan

Sriram Madhavan 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: 10968803
    Abstract: An apparatus includes a stored reductant determination circuit structured to determine an amount of stored reductant in a component of an exhaust aftertreatment system, and a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during an engine idle mode of operation based on the amount of stored reductant.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: April 6, 2021
    Assignee: Cummins Inc.
    Inventors: Minming Zhao, Josh Si Shao, Sriram Madhavan, Matthew John Zanker
  • Publication number: 20190376428
    Abstract: An apparatus includes a stored reductant determination circuit structured to determine an amount of stored reductant in a component of an exhaust aftertreatment system, and a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during an engine idle mode of operation based on the amount of stored reductant.
    Type: Application
    Filed: August 26, 2019
    Publication date: December 12, 2019
    Applicant: Cummins Inc.
    Inventors: Minming Zhao, Josh Si Shao, Sriram Madhavan, Matthew John Zanker
  • Patent number: 10392990
    Abstract: An apparatus includes a stored reductant determination circuit structured to determine an amount of stored reductant in a component of an exhaust aftertreatment system, and a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during an engine idle mode of operation based on the amount of stored reductant.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: August 27, 2019
    Assignee: Cummins Inc.
    Inventors: Minming Zhao, Josh Si Shao, Sriram Madhavan, Matthew John Zanker
  • Patent number: 10372871
    Abstract: An IC design layout is decomposed into multiple masks to produce an initial output. A post-decomposition optimization is performed. The post-decomposition optimization includes identifying hotspots in the multiple masks, clustering features that contribute to the hotspots into clusters, identifying ones of the clusters that can be relocated to a different mask to eliminate the hotspot, without violating design rules, as reversible clusters, ranking movement of the reversible clusters by comparing the reversible clusters, as potentially moved, to known manufacturability metrics, and moving the reversible clusters to different masks according to the priority established by the ranking, to produce a post-decomposition optimized tape-out. The IC devices are manufactured by applying the post-decomposition optimized tape-out to manufacturing equipment.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: August 6, 2019
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Lynn Tao-Ning Wang, Sriram Madhavan
  • Publication number: 20190034577
    Abstract: An IC design layout is decomposed into multiple masks to produce an initial output. A post-decomposition optimization is performed. The post-decomposition optimization includes identifying hotspots in the multiple masks, clustering features that contribute to the hotspots into clusters, identifying ones of the clusters that can be relocated to a different mask to eliminate the hotspot, without violating design rules, as reversible clusters, ranking movement of the reversible clusters by comparing the reversible clusters, as potentially moved, to known manufacturability metrics, and moving the reversible clusters to different masks according to the priority established by the ranking, to produce a post-decomposition optimized tape-out. The IC devices are manufactured by applying the post-decomposition optimized tape-out to manufacturing equipment.
    Type: Application
    Filed: July 28, 2017
    Publication date: January 31, 2019
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Lynn Tao-Ning Wang, Sriram Madhavan
  • Patent number: 10095826
    Abstract: A method and apparatus for selecting Si wafer WP based on individual or multiple DFM decks for Si-feed-forward and Si-feed-back analysis are provided. Embodiments include generating markers for a wafer from an individual DFM deck; generating UCF Indexes; determining whether a representative marker corresponding to a UCF is a candidate for WP prediction; extracting markers corresponding to that UCF-Index (UEF data) from a candidate; performing a UCF-Index-based sampling on the extracted UEF data set if a number of markers in the extracted UEF data set is larger than an inspection requirement; adding a location of each marker or group of markers in the extracted UEF data set to a sitelist after the UCF-Index-based sampling; sending the sitelist to a foundry for metrology analysis on sitelist locations; and adding the sitelist locations and corresponding UCF Index and metrology parameters to a design analysis database for analyzing other wafers/UCF Indexes.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: October 9, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Shikha Somani, Sriram Madhavan, Thomas Herrmann, Stefan Schüler, Uwe Schroeder, Shobhit Malik, Eric Chiu
  • Patent number: 10055535
    Abstract: Disclosed is a method and corresponding system and program product that includes providing integrated circuit design layout(s), deconstructing the integrated circuit design layout(s) into unit-level geometric constructs, identifying anomalies in the unit-level geometric constructs, and storing anomaly data in a database.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: August 21, 2018
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Piyush Pathak, Robert C. Pack, Wei-Long Wang, Karthik Krishnamoorthy, Fadi S. Batarseh, Uwe Paul Schroeder, Sriram Madhavan
  • Publication number: 20180106179
    Abstract: An apparatus includes a stored reductant determination circuit structured to determine an amount of stored reductant in a component of an exhaust aftertreatment system, and a fuel mode economy circuit structured to control an amount of reductant added to the exhaust aftertreatment system during an engine idle mode of operation based on the amount of stored reductant.
    Type: Application
    Filed: October 14, 2016
    Publication date: April 19, 2018
    Applicant: Cummins Inc.
    Inventors: Minming Zhao, Josh Si Shao, Sriram Madhavan, Matthew John Zanker
  • Publication number: 20180089357
    Abstract: Disclosed is a method and corresponding system and program product that includes providing integrated circuit design layout(s), deconstructing the integrated circuit design layout(s) into unit-level geometric constructs, identifying anomalies in the unit-level geometric constructs, and storing anomaly data in a database.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 29, 2018
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Piyush PATHAK, Robert C. PACK, Wei-Long WANG, Karthik KRISHNAMOORTHY, Fadi S. BATARSEH, Uwe Paul SCHROEDER, Sriram MADHAVAN
  • Publication number: 20170364626
    Abstract: A method and apparatus for selecting Si wafer WP based on individual or multiple DFM decks for Si-feed-forward and Si-feed-back analysis are provided. Embodiments include generating markers for a wafer from an individual DFM deck; generating UCF Indexes; determining whether a representative marker corresponding to a UCF is a candidate for WP prediction; extracting markers corresponding to that UCF-Index (UEF data) from a candidate; performing a UCF-Index-based sampling on the extracted UEF data set if a number of markers in the extracted UEF data set is larger than an inspection requirement; adding a location of each marker or group of markers in the extracted UEF data set to a sitelist after the UCF-Index-based sampling; sending the sitelist to a foundry for metrology analysis on sitelist locations; and adding the sitelist locations and corresponding UCF Index and metrology parameters to a design analysis database for analyzing other wafers/UCF Indexes.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 21, 2017
    Inventors: Shikha SOMANI, Sriram MADHAVAN, Thomas HERRMANN, Stefan SCHÜLER, Uwe SCHROEDER, Shobhit MALIK, Eric CHIU
  • Publication number: 20150286763
    Abstract: Methods and apparatuses for pattern-based methodology for CAA and defect limited yield analysis are disclosed. Embodiments may include matching one or more patterns within a layer of an integrated circuit design layout to one or more pre-characterized patterns within a pattern library, determining respective critical areas of the one or more patterns based on respective pre-characterized critical areas of the one or more pre-characterized patterns, and predicting a defect limited yield of the layer based on the respective pre-characterized critical areas.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 8, 2015
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Lynn WANG, Sriram MADHAVAN, Vito DAI, Luigi CAPODIECI
  • Patent number: 8918745
    Abstract: Methodology enabling a reduction in a density difference between two complementary exposure masks and/or windows of a layout and an apparatus for performing the method are disclosed. Embodiments include: determining a layer of an IC design having features to be resolved by first and second masks; determining a difference of density by comparing a first density of a first set of the features with a second density of a second set of the features; determining a region on the layer of a first feature to be resolved by the first mask; and inserting, within the region, a polygon to be resolved by the second mask based on the difference of density.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 23, 2014
    Assignee: GlobalFoundries Inc.
    Inventors: Lynn Wang, Sriram Madhavan, Luigi Capodieci
  • Publication number: 20140282301
    Abstract: Methodology enabling a reduction in a density difference between two complementary exposure masks and/or windows of a layout and an apparatus for performing the method are disclosed. Embodiments include: determining a layer of an IC design having features to be resolved by first and second masks; determining a difference of density by comparing a first density of a first set of the features with a second density of a second set of the features; determining a region on the layer of a first feature to be resolved by the first mask; and inserting, within the region, a polygon to be resolved by the second mask based on the difference of density.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Lynn WANG, Sriram Madhavan, Luigi CAPODIECI
  • Patent number: 8745553
    Abstract: An approach is provided for applying post graphic data system (GDS) stream enhancements back to the design stage. Embodiments include receiving a data stream of an integrated circuit design layout from a design stage, determining one or more design constructs based on an analysis of the data stream, determining one or more instructions to implement the one or more design constructs at the design stage, and sending the instructions to the design stage to implement the one or more design constructs.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: June 3, 2014
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Swamy Muddu, Sriram Madhavan, Shobhit Malik
  • Publication number: 20140059506
    Abstract: An approach is provided for applying post graphic data system (GDS) stream enhancements back to the design stage. Embodiments include receiving a data stream of an integrated circuit design layout from a design stage, determining one or more design constructs based on an analysis of the data stream, determining one or more instructions to implement the one or more design constructs at the design stage, and sending the instructions to the design stage to implement the one or more design constructs.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 27, 2014
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Swamy MUDDU, Sriram MADHAVAN, Shobhit MALIK
  • Patent number: 8656336
    Abstract: A method includes receiving a design layout file for an integrated circuit device in a computing apparatus. The design layout file specifies dimensions of a plurality of features. Outer markers are generated in the computing apparatus for at least a subset of the features based on the proximity of the features to one another and spacing requirements. Features are identified in the computing apparatus where the associated outer marker has at least one dimension greater than the dimensions specified for the feature.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: February 18, 2014
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Piyush Pathak, Shobhit Malik, Sriram Madhavan
  • Publication number: 20130227498
    Abstract: A method includes receiving a design layout file for an integrated circuit device in a computing apparatus. The design layout file specifies dimensions of a plurality of features. Outer markers are generated in the computing apparatus for at least a subset of the features based on the proximity of the features to one another and spacing requirements. Features are identified in the computing apparatus where the associated outer marker has at least one dimension greater than the dimensions specified for the feature.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 29, 2013
    Applicant: Globalfoundries Inc.
    Inventors: Piyush Pathak, Shobhit Malik, Sriram Madhavan
  • Patent number: 8516407
    Abstract: A method for fabricating an integrated circuit is disclosed that includes, in accordance with an embodiment, providing a double patterning technology-compliant logical design for the integrated circuit, the logical design including a plurality of elements; scoring the design of one or more of the plurality of elements to produce a design score; modifying the design based at least in part on the design score; generating a mask set implementing the modified logical design; and employing the mask set to implement the logical design in and on a semiconductor substrate.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: August 20, 2013
    Assignee: GLOBALFOUNDRIES, Inc.
    Inventors: Lynn T. Wang, Sriram Madhavan, Luigi Capodieci
  • Publication number: 20130198696
    Abstract: A method for fabricating an integrated circuit is disclosed that includes, in accordance with an embodiment, providing a double patterning technology-compliant logical design for the integrated circuit, the logical design including a plurality of elements; scoring the design of one or more of the plurality of elements to produce a design score; modifying the design based at least in part on the design score; generating a mask set implementing the modified logical design; and employing the mask set to implement the logical design in and on a semiconductor substrate.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Lynn T. Wang, Sriram Madhavan, Luigi Capodieci
  • Patent number: 8293606
    Abstract: A body tie test structure and methods for its manufacture are provided. The transistor comprises a body-tied semiconductor on insulator (SOI) transistor formed in a layer of semiconductor material, the transistor comprising a cross-shaped gate structure with a substantially constant gate length L. An insulating blocking layer enables formation of a spacer region in the layer of semiconductor material separating the source and drain regions from the body tie region. A conductive channel with substantially the same inversion characteristics as the intrinsic transistor body connects the body tie to the intrinsic transistor body through the spacer region.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: October 23, 2012
    Assignee: GLOBALFOUNDARIES, Inc.
    Inventors: Sriram Madhavan, Qiang Chen, Darin A. Chan, Jung-Suk Goo