Patents by Inventor Sagar Kekare

Sagar 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).

  • Publication number: 20090297019
    Abstract: Various methods and systems for utilizing design data in combination with inspection data are provided. One computer-implemented method for binning defects detected on a wafer includes comparing portions of design data proximate positions of the defects in design data space. The method also includes determining if the design data in the portions is at least similar based on results of the comparing step. In addition, the method includes binning the defects in groups such that the portions of the design data proximate the positions of the defects in each of the groups are at least similar. The method further includes storing results of the binning step in a storage medium.
    Type: Application
    Filed: August 3, 2009
    Publication date: December 3, 2009
    Applicant: KLA-TENCOR TECHNOLOGIES CORPORATION
    Inventors: Khurram Zafar, Sagar Kekare, Ellis Chang, Allen Park, Peter Rose
  • Patent number: 7570796
    Abstract: Various methods and systems for utilizing design data in combination with inspection data are provided. One computer-implemented method for binning defects detected on a wafer includes comparing portions of design data proximate positions of the defects in design data space. The method also includes determining if the design data in the portions is at least similar based on results of the comparing step. In addition, the method includes binning the defects in groups such that the portions of the design data proximate the positions of the defects in each of the groups are at least similar. The method further includes storing results of the binning step in a storage medium.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: August 4, 2009
    Assignee: KLA-Tencor Technologies Corp.
    Inventors: Khurram Zafar, Sagar Kekare, Ellis Chang, Allen Park, Peter Rose
  • Publication number: 20080081385
    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: November 14, 2007
    Publication date: April 3, 2008
    Inventors: Paul Marella, Sharon McCauley, Ellis Chang, William Volk, James Wiley, Sterling Watson, Sagar Kekare, Carl Hess
  • Publication number: 20070288219
    Abstract: Various methods and systems for utilizing design data in combination with inspection data are provided. One computer-implemented method for binning defects detected on a wafer includes comparing portions of design data proximate positions of the defects in design data space. The method also includes determining if the design data in the portions is at least similar based on results of the comparing step. In addition, the method includes binning the defects in groups such that the portions of the design data proximate the positions of the defects in each of the groups are at least similar. The method further includes storing results of the binning step in a storage medium.
    Type: Application
    Filed: November 20, 2006
    Publication date: December 13, 2007
    Inventors: Khurram Zafar, Sagar Kekare, Ellis Chang, Allen Park, Peter Rose
  • Publication number: 20070035728
    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: Application
    Filed: December 20, 2005
    Publication date: February 15, 2007
    Inventors: Sagar Kekare, Ingrid Peterson, Moshe Preil
  • Publication number: 20050004774
    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: July 1, 2004
    Publication date: January 6, 2005
    Inventors: William Volk, James Wiley, Sterling Watson, Sagar Kekare, Carl Hess, Paul Marella, Sharon McCauley, Ellis Chang