Patents by Inventor Sagar A. Kekare

Sagar A. Kekare 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: 11348222
    Abstract: Methods and systems for inspection of wafers and reticles using designer intent data are provided. One computer-implemented method includes identifying nuisance defects on a wafer based on inspection data produced by inspection of a reticle, which is used to form a pattern on the wafer prior to inspection of the wafer. Another computer-implemented method includes detecting defects on a wafer by analyzing data generated by inspection of the water in combination with data representative of a reticle, which includes designations identifying different types of portions of the reticle. An additional computer-implemented method includes determining a property of a manufacturing process used to process a wafer based on defects that alter a characteristic of a device formed on the wafer. Further computer-implemented methods include altering or simulating one or more characteristics of a design of an integrated circuit based on data generated by inspection of a wafer.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: May 31, 2022
    Assignee: KLA-Tencor Technologies Corp.
    Inventors: Paul Frank Marella, Sharon McCauley, Ellis Chang, William Volk, James Wiley, Sterling Watson, Sagar A. Kekare, Carl Hess
  • Patent number: 10713771
    Abstract: Methods and systems for inspection of wafers and reticles using designer intent data are provided. One computer-implemented method includes identifying nuisance defects on a wafer based on inspection data produced by inspection of a reticle, which is used to form a pattern on the wafer prior to inspection of the wafer. Another computer-implemented method includes detecting defects on a wafer by analyzing data generated by inspection of the wafer in combination with data representative of a reticle, which includes designations identifying different types of portions of the reticle. An additional computer-implemented method includes determining a property of a manufacturing process used to process a wafer based on defects that alter a characteristic of a device formed on the wafer. Further computer-implemented methods include altering or simulating one or more characteristics of a design of an integrated circuit based on data generated by inspection of a wafer.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: July 14, 2020
    Assignee: KLA-Tencor Technologies Corp.
    Inventors: Paul Frank Marella, Sharon McCauley, Ellis Chang, William Volk, James Wiley, Sterling Watson, Sagar A. Kekare, Carl Hess
  • Publication number: 20200074619
    Abstract: Methods and systems for inspection of wafers and reticles using designer intent data are provided. One computer-implemented method includes identifying nuisance defects on a wafer based on inspection data produced by inspection of a reticle, which is used to form a pattern on the wafer prior to inspection of the wafer. Another computer-implemented method includes detecting defects on a wafer by analyzing data generated by inspection of the water in combination with data representative of a reticle, which includes designations identifying different types of portions of the reticle. An additional computer-implemented method includes determining a property of a manufacturing process used to process a wafer based on defects that alter a characteristic of a device formed on the wafer. Further computer-implemented methods include altering or simulating one or more characteristics of a design of an integrated circuit based on data generated by inspection of a wafer.
    Type: Application
    Filed: November 7, 2019
    Publication date: March 5, 2020
    Inventors: Paul Frank Marella, Sharon McCauley, Ellis Chang, William Volk, James Wiley, Sterling Watson, Sagar A. Kekare, Carl Hess
  • Patent number: 10303839
    Abstract: Methods and systems for determining electrically relevant placement of metrology targets using design analysis are disclosed. The method may include: identifying at least one critical design element of an integrated circuit based on a design of the integrated circuit; determining whether the design of the integrated circuit allows for an insertion of a metrology target in a vicinity of the at least one critical design element; and modifying the design of the integrated circuit by inserting a metrology target into the vicinity of the at least one critical design element when the design of the integrated circuit allows for the insertion of the metrology target.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: May 28, 2019
    Assignee: KLA-Tencor Corporation
    Inventor: Sagar A. Kekare
  • Publication number: 20180247403
    Abstract: Methods and systems for inspection of wafers and reticles using designer intent data are provided. One computer-implemented method includes identifying nuisance defects on a wafer based on inspection data produced by inspection of a reticle, which is used to form a pattern on the wafer prior to inspection of the wafer. Another computer-implemented method includes detecting defects on a wafer by analyzing data generated by inspection of the wafer in combination with data representative of a reticle, which includes designations identifying different types of portions of the reticle. An additional computer-implemented method includes determining a property of a manufacturing process used to process a wafer based on defects that alter a characteristic of a device formed on the wafer. Further computer-implemented methods include altering or simulating one or more characteristics of a design of an integrated circuit based on data generated by inspection of a wafer.
    Type: Application
    Filed: April 25, 2018
    Publication date: August 30, 2018
    Inventors: Paul Frank Marella, Sharon McCauley, Ellis Chang, William Volk, James Wiley, Sterling Watson, Sagar A. Kekare, Carl Hess
  • Publication number: 20170351804
    Abstract: Methods and systems for determining electrically relevant placement of metrology targets using design analysis are disclosed. The method may include: identifying at least one critical design element of an integrated circuit based on a design of the integrated circuit; determining whether the design of the integrated circuit allows for an insertion of a metrology target in a vicinity of the at least one critical design element; and modifying the design of the integrated circuit by inserting a metrology target into the vicinity of the at least one critical design element when the design of the integrated circuit allows for the insertion of the metrology target.
    Type: Application
    Filed: December 20, 2016
    Publication date: December 7, 2017
    Inventor: Sagar A. Kekare
  • Patent number: 9689923
    Abstract: A method and a system for determining one or more parameters for electrical testing of a wafer are provided. One method includes determining electrical test paths through a device being formed on a wafer and physical layout components in different layers of the device corresponding to each of the electrical test paths. The method also includes determining one or more parameters of electrical testing for the wafer based on one or more characteristics of the electrical test paths. In addition, the method includes acquiring information for one or more characteristics of a physical version of the wafer. The information is generated by performing an inline process on the physical version of the wafer. The method further includes altering at least one of the one or more parameters of the electrical testing for the wafer based on the acquired information.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: June 27, 2017
    Assignee: KLA-Tencor Corp.
    Inventor: Sagar A. Kekare
  • Patent number: 9400865
    Abstract: Methods and systems for extracting comprehensive design guidance for in-line process control of wafers are provided. One method includes automatically identifying potential marginalities in a design for a device to be formed on a wafer. The method also includes automatically generating information for the potential marginalities. The automatically generated information is used to set up process control for the wafer.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: July 26, 2016
    Assignee: KLA-Tencor Corp.
    Inventors: Sagar A. Kekare, Sergei G. Bakarian
  • Publication number: 20150363537
    Abstract: Methods and systems for extracting comprehensive design guidance for in-line process control of wafers are provided. One method includes automatically identifying potential marginalities in a design for a device to be formed on a wafer. The method also includes automatically generating information for the potential marginalities. The automatically generated information is used to set up process control for the wafer.
    Type: Application
    Filed: June 10, 2015
    Publication date: December 17, 2015
    Inventors: Sagar A. Kekare, Sergei G. Bakarian
  • Publication number: 20150178914
    Abstract: Methods and systems for inspection of wafers and reticles using designer intent data are provided. One computer-implemented method includes identifying nuisance defects on a wafer based on inspection data produced by inspection of a reticle, which is used to form a pattern on the wafer prior to inspection of the wafer. Another computer-implemented method includes detecting defects on a wafer by analyzing data generated by inspection of the wafer in combination with data representative of a reticle, which includes designations identifying different types of portions of the reticle. An additional computer-implemented method includes determining a property of a manufacturing process used to process a wafer based on defects that alter a characteristic of a device formed on the wafer. Further computer-implemented methods include altering or simulating one or more characteristics of a design of an integrated circuit based on data generated by inspection of a wafer.
    Type: Application
    Filed: March 4, 2015
    Publication date: June 25, 2015
    Inventors: Paul Frank Marella, Sharon McCauley, Ellis Chang, William Volk, James Wiley, Sterling Watson, Sagar A. Kekare, Carl Hess
  • Patent number: 9002497
    Abstract: Methods and systems for inspection of wafers and reticles using designer intent data are provided. One computer-implemented method includes identifying nuisance defects on a wafer based on inspection data produced by inspection of a reticle, which is used to form a pattern on the wafer prior to inspection of the wafer. Another computer-implemented method includes detecting defects on a wafer by analyzing data generated by inspection of the wafer in combination with data representative of a reticle, which includes designations identifying different types of portions of the reticle. An additional computer-implemented method includes determining a property of a manufacturing process used to process a wafer based on defects that alter a characteristic of a device formed on the wafer. Further computer-implemented methods include altering or simulating one or more characteristics of a design of an integrated circuit based on data generated by inspection of a wafer.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: April 7, 2015
    Assignee: KLA-Tencor Technologies Corp.
    Inventors: William Volk, James Wiley, Sterling Watson, Sagar A. Kekare, Carl Hess, Paul Frank Marella, Sharon McCauley, Ellis Chang
  • Publication number: 20150039954
    Abstract: Methods and systems for determining one or more parameters for electrical testing of a wafer are provided. One method includes determining electrical test paths through a device being formed on a wafer and physical layout components in different layers of the device corresponding to each of the electrical test paths. The method also includes determining one or more parameters of electrical testing for the wafer based on one or more characteristics of the electrical test paths. In addition, the method includes acquiring information for one or more characteristics of a physical version of the wafer. The information is generated by performing an inline process on the physical version of the wafer. The method further includes altering at least one of the one or more parameters of the electrical testing for the wafer based on the acquired information.
    Type: Application
    Filed: August 1, 2014
    Publication date: February 5, 2015
    Inventor: Sagar A. Kekare
  • Patent number: 7769225
    Abstract: Computer-implemented methods and systems for detecting defects in a reticle design pattern are provided. One computer-implemented method includes acquiring images of a field in the reticle design pattern. The images illustrate how the field will be printed on a wafer at different values of one or more parameters of a wafer printing process. The field includes a first die and a second die. The method also includes detecting defects in the field based on a comparison of two or more of the images corresponding to two or more of the different values. In addition, the method includes determining if individual defects located in the first die have substantially the same within die position as individual defects located in the second die.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: August 3, 2010
    Assignee: KLA-Tencor Technologies Corp.
    Inventors: Sagar A. Kekare, Ingrid B. Peterson, Moshe E. Preil