Patents by Inventor Premkumar Panneerchelvam

Premkumar Panneerchelvam 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: 11966203
    Abstract: A system is disclosed, in accordance with one or more embodiments of the present disclosure. The system includes a metrology tool configured to acquire one or more measurements of a portion of a sample. The system includes a controller including one or more processors configured to execute program instructions causing the one or more processors to: generate a surface kinetics model output based on a surface kinetics model; determine an expected response of the surface kinetics model output to excitation by polarized light; compare the determined expected response to the one or more measurements; generate one or more metrics based on the comparison between the determined expected response and the one or more measurements of the sample; adjust one or more parameters of the surface kinetics model to generate an adjusted surface kinetics model; and apply the adjusted surface kinetics model to simulate on-sample performance during plasma processing.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: April 23, 2024
    Assignee: KLA Corporation
    Inventors: Ankur Agarwal, Chad Huard, Yiting Zhang, Haifeng Pu, Xin Li, Premkumar Panneerchelvam, Fiddle Han, Yeurui Chen
  • Publication number: 20240120186
    Abstract: Plasma parameters at a surface of a wafer are determined with a plasma hypermodel based on plasma processing conditions. A post-processing profile can be predicted for the surface of the wafer with a feature-scale profile model. Correlations in the plasma hypermodel can be recalibrated if the post-processing profile is outside a convergence criterion of an experimental reference.
    Type: Application
    Filed: November 7, 2022
    Publication date: April 11, 2024
    Inventors: Chad HUARD, Premkumar PANNEERCHELVAM, Shuo HUANG, Mark D. SMITH
  • Patent number: 11868689
    Abstract: Systems and methods for setting up a physics-based model are provided. One system includes one or more components that are executed by one or more computer subsystems and that include a physics-based model describing a semiconductor fabrication-related process and a set up component configured for setting up the physics-based model in multiple phases in each of which only a subset of all of the parameters of the physics-based model are set up. A configuration of the set up component is changed between at least two of the multiple phases based on the subset of all of the parameters of the physics-based model set up in the at least two of the multiple phases. The set up component may perform a Bayesian optimization technique for cascaded model set up or calibration using multiple information sources and objective functions.
    Type: Grant
    Filed: October 4, 2022
    Date of Patent: January 9, 2024
    Assignee: KLA Corp.
    Inventors: Chad Huard, Premkumar Panneerchelvam, Guy Parsey, Ankur Agarwal
  • Publication number: 20230112164
    Abstract: Systems and methods for setting up a physics-based model are provided. One system includes one or more components that are executed by one or more computer subsystems and that include a physics-based model describing a semiconductor fabrication-related process and a set up component configured for setting up the physics-based model in multiple phases in each of which only a subset of all of the parameters of the physics-based model are set up. A configuration of the set up component is changed between at least two of the multiple phases based on the subset of all of the parameters of the physics-based model set up in the at least two of the multiple phases. The set up component may perform a Bayesian optimization technique for cascaded model set up or calibration using multiple information sources and objective functions.
    Type: Application
    Filed: October 4, 2022
    Publication date: April 13, 2023
    Inventors: Chad Huard, Premkumar Panneerchelvam, Guy Parsey, Ankur Agarwal
  • Publication number: 20210055699
    Abstract: A system is disclosed, in accordance with one or more embodiments of the present disclosure. The system includes a metrology tool configured to acquire one or more measurements of a portion of a sample. The system includes a controller including one or more processors configured to execute program instructions causing the one or more processors to: generate a surface kinetics model output based on a surface kinetics model; determine an expected response of the surface kinetics model output to excitation by polarized light; compare the determined expected response to the one or more measurements; generate one or more metrics based on the comparison between the determined expected response and the one or more measurements of the sample; adjust one or more parameters of the surface kinetics model to generate an adjusted surface kinetics model; and apply the adjusted surface kinetics model to simulate on-sample performance during plasma processing.
    Type: Application
    Filed: May 12, 2020
    Publication date: February 25, 2021
    Inventors: Ankur A. Agarwal, Chad Huard, Yiting Zhang, Haifeng Pu, Xin Li, Premkumar Panneerchelvam, Fiddle Han, Yeurui Chen