Patents by Inventor Ankush Oberai

Ankush Oberai 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: 9471745
    Abstract: A defective integrated circuit (IC) is analyzed to identify a portion of the integrated circuit possibly containing an electrical defect. A computer is used to process the design information of the integrated circuit and to navigate to the physical portion of the integrated circuit where the potential electrical defect might be found. The design information includes information on the layout and the technology used to fabricate the integrated circuit. A three-dimensional view of the portion of the design of the integrated circuit where the electrical defect might be found is rendered, based on the design information for the integrated circuit.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: October 18, 2016
    Assignee: Synopsys, Inc.
    Inventors: Xi-Wei Lin, Ankush Oberai
  • Patent number: 9454635
    Abstract: A layout design for a semiconductor chip includes two or more layers, each including a set of shapes, which are used for various fabrication processes during the manufacture of a physical semiconductor chip. Some manufacturing processes create physical features on the semiconductor chip that do not directly correspond to shapes in the layout design. To facilitate design analysis of such semiconductor chips, shapes from the layout design are selected and manipulated by performing one or more operations, such as Boolean operations, on the shapes to generate new shapes. The new shapes, which can represent physical features of the manufactured semiconductor chip, are then displayed, along with an image of the corresponding section of the physical semiconductor chip, to facilitate design analysis, such as failure analysis.
    Type: Grant
    Filed: January 24, 2015
    Date of Patent: September 27, 2016
    Assignee: Synopsys, Inc.
    Inventor: Ankush Oberai
  • Patent number: 9430606
    Abstract: Defect characterization and failure analysis are useful tools for analyzing and improving fabrication for semiconductor chips. By using a layout and a netlist in combination with images of semiconductors, defects can be identified and analyzed. Electrical simulation can be performed on the netlist, based on the presence of the defect that was detected. Layout geometries where the defect was detected can be binned, and a search can be performed of the remainder of the layout for similar groupings of layout geometries. Various representations of the semiconductor can be cross-mapped, including layout, schematic, and netlist. The presence of certain defects can be correlated to yield, to performance, and to other characteristics.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: August 30, 2016
    Assignee: Synopsys, Inc.
    Inventor: Ankush Oberai
  • Publication number: 20160019331
    Abstract: A defective integrated circuit (IC) is analyzed to identify a portion of the integrated circuit possibly containing an electrical defect. A computer is used to process the design information of the integrated circuit and to navigate to the physical portion of the integrated circuit where the potential electrical defect might be found. The design information includes information on the layout and the technology used to fabricate the integrated circuit. A three-dimensional view of the portion of the design of the integrated circuit where the electrical defect might be found is rendered, based on the design information for the integrated circuit.
    Type: Application
    Filed: September 28, 2015
    Publication date: January 21, 2016
    Inventors: Xi-Wei Lin, Ankush Oberai
  • Patent number: 9147027
    Abstract: A defective integrated circuit (IC) is analyzed to identify a portion of the integrated circuit possibly containing an electrical defect. A computer is used to process the design information of the integrated circuit and to navigate to the physical portion of the integrated circuit where potential electrical defect might be found. The design information includes information on the layout and the technology used to fabricate the integrated circuit. A three-dimensional view of the portion of the design of integrated circuit where the electrical defect might be found is rendered, based on the design information for the integrated circuit.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: September 29, 2015
    Assignee: Synopsys, Inc.
    Inventors: Xi-Wei Lin, Ankush Oberai
  • Publication number: 20150213189
    Abstract: A layout design for a semiconductor chip includes two or more layers, each including a set of shapes, which are used for various fabrication processes during the manufacture of a physical semiconductor chip. Some manufacturing processes create physical features on the semiconductor chip that do not directly correspond to shapes in the layout design. To facilitate design analysis of such semiconductor chips, shapes from the layout design are selected and manipulated by performing one or more operations, such as Boolean operations, on the shapes to generate new shapes. The new shapes, which can represent physical features of the manufactured semiconductor chip, are then displayed, along with an image of the corresponding section of the physical semiconductor chip, to facilitate design analysis, such as failure analysis.
    Type: Application
    Filed: January 24, 2015
    Publication date: July 30, 2015
    Inventor: Ankush Oberai
  • Publication number: 20150007121
    Abstract: A defective integrated circuit (IC) is analyzed to identify a portion of the integrated circuit possibly containing an electrical defect. A computer is used to process the design information of the integrated circuit and to navigate to the physical portion of the integrated circuit where potential electrical defect might be found. The design information includes information on the layout and the technology used to fabricate the integrated circuit. A three-dimensional view of the portion of the design of integrated circuit where the electrical defect might be found is rendered, based on the design information for the integrated circuit.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 1, 2015
    Inventors: Xi-Wei Lin, Ankush Oberai
  • Publication number: 20140310670
    Abstract: Defect characterization and failure analysis are useful tools for analyzing and improving fabrication for semiconductor chips. By using a layout and a netlist in combination with images of semiconductors, defects can be identified and analyzed. Electrical simulation can be performed on the netlist, based on the presence of the defect that was detected. Layout geometries where the defect was detected can be binned, and a search can be performed of the remainder of the layout for similar groupings of layout geometries. Various representations of the semiconductor can be cross-mapped, including layout, schematic, and netlist. The presence of certain defects can be correlated to yield, to performance, and to other characteristics.
    Type: Application
    Filed: July 7, 2014
    Publication date: October 16, 2014
    Inventor: Ankush Oberai
  • Patent number: 8826209
    Abstract: Defect characterization is a useful tool for analyzing and improving fabrication for semiconductor chips. By using layout and netlist in combination with images of semiconductors, defects can be identified and analyzed. Electrical simulation can be performed on the netlist, based on the presence of the defect that was detected. Layout geometries where the defect was detected can be binned and a search can be performed of the remainder of the layout for similar groupings of layout geometries. Various representations of the semiconductor can be cross mapped, including layout, schematic, and netlist. The presence of certain defects can be correlated to yield, performance, and other characteristics.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: September 2, 2014
    Assignee: Synopsys, Inc.
    Inventors: James Robert Kramer, Ankush Oberai
  • Patent number: 8775979
    Abstract: The use of design rule checks for failure analysis of semiconductor chips is described. The smaller geometries of recent semiconductor devices lead to a much higher level of sensitivity of devices to photolithography related systematic problems. Failure analysis to date has focused on physical, randomly distributed defects of devices rather than systematic problems caused by the mask manufacturing or mask application process. Methods and systems are described which allow for online searches of a layout database for geometric features defined by a set of rules. The rules may be defined as two-dimensional Boolean operations including shape or distance based as well as any kind of combination. The result is graphically and interactively presented.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: July 8, 2014
    Assignee: Synopsys. Inc.
    Inventor: Ankush Oberai
  • Publication number: 20130007684
    Abstract: Defect characterization is a useful tool for analyzing and improving fabrication for semiconductor chips. By using layout and netlist in combination with images of semiconductors, defects can be identified and analyzed. Electrical simulation can be performed on the netlist, based on the presence of the defect that was detected. Layout geometries where the defect was detected can be binned and a search can be performed of the remainder of the layout for similar groupings of layout geometries. Various representations of the semiconductor can be cross mapped, including layout, schematic, and netlist. The presence of certain defects can be correlated to yield, performance, and other characteristics.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Inventors: James Robert Kramer, Ankush Oberai
  • Patent number: 8255865
    Abstract: Signal tracing across boards and chips can be used to greatly enhance failure analysis of the boards and chips. Concepts are disclosed for tracing one or more signal lines across a board, across a chip boundary, and across a chip. Signals may be traced through active circuitry on a chip along with paths through various logic cones. The result can be graphically and interactively presented.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: August 28, 2012
    Assignee: Synopsys, Inc.
    Inventors: Ankush Oberai, Scott Shen
  • Publication number: 20110191742
    Abstract: Signal tracing across boards and chips can be used to greatly enhance failure analysis of the boards and chips. Concepts are disclosed for tracing one or more signal lines across a board, across a chip boundary, and across a chip. Signals may be traced through active circuitry on a chip along with paths through various logic cones. The result can be graphically and interactively presented.
    Type: Application
    Filed: January 28, 2011
    Publication date: August 4, 2011
    Inventors: Ankush Oberai, Scott Shen
  • Publication number: 20110191725
    Abstract: The use of design rule checks for failure analysis of semiconductor chips is described. The smaller geometries of recent semiconductor devices lead to a much higher level of sensitivity of devices to photolithography related systematic problems. Failure analysis to date has focused on physical, randomly distributed defects of devices rather than systematic problems caused by the mask manufacturing or mask application process. Methods and systems are described which allow for online searches of a layout database for geometric features defined by a set of rules. The rules may be defined as two-dimensional Boolean operations including shape or distance based as well as any kind of combination. The result is graphically and interactively presented.
    Type: Application
    Filed: January 6, 2011
    Publication date: August 4, 2011
    Inventor: Ankush Oberai