Patents by Inventor Bijoy RAJASEKHARAN

Bijoy RAJASEKHARAN 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: 11669017
    Abstract: A method for determining a plurality of corrections for control of at least one manufacturing apparatus used in a manufacturing process for providing product structures to a substrate in a plurality of layers, the method including: determining the plurality of corrections including a correction for each layer, based on an actuation potential of the applicable manufacturing apparatus used in the formation of each layer, wherein the determining includes determining corrections for each layer simultaneously in terms of a matching parameter.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: June 6, 2023
    Assignee: ASML NETHERLANDS B.V.
    Inventors: Roy Werkman, Bijoy Rajasekharan, Lydia Marianna Vergaij-Huizer, Jochem Sebastiaan Wildenberg, Ronald Van Ittersum, Pieter Gerardus Jacobus Smorenberg, Robertus Wilhelmus Van Der Heijden, Xiuhong Wei, Hadi Yagubizade
  • Patent number: 11442367
    Abstract: A method for optimizing a sequence of processes for manufacturing of product units, includes: associating measurement results of performance parameters (e.g., fingerprints) with the recorded process characteristics (e.g., context); obtaining a characteristic (e.g., context) of a previous process (e.g. deposition) in the sequence already performed on a product unit; obtaining a characteristic (e.g., context) of a subsequent process (e.g., exposure) in the sequence to be performed on the product unit; determining a predicted performance parameter (e.g., fingerprint) of the product unit associated with the sequence of previous and subsequent processes by using the obtained characteristics to retrieve measurement results of the performance parameters (e.g., fingerprints) corresponding to the recorded characteristics; and determining corrections to be applied to future processes (e.g. exposure, etch) in the sequence to be performed on the product unit, based on the determined predicted performance parameter.
    Type: Grant
    Filed: August 25, 2021
    Date of Patent: September 13, 2022
    Assignee: ASML Netherlands B.V.
    Inventors: Jochem Sebastiaan Wildenberg, Marinus Jochemsen, Erik Jensen, Erik Johannes Maria Wallerbos, Cornelis Johannes Rijnierse, Bijoy Rajasekharan, Roy Werkman, Jurgen Johannes Henderikus Maria Schoonus
  • Patent number: 11300887
    Abstract: A method to change an etch parameter of a substrate etching process, the method including: making a first measurement of a first metric associated with a structure on a substrate before being etched; making a second measurement of a second metric associated with a structure on a substrate after being etched; and changing the etch parameter based on a difference between the first measurement and the second measurement.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: April 12, 2022
    Assignee: ASML Netherlands B.V.
    Inventors: Richard Johannes Franciscus Van Haren, Victor Emanuel Calado, Leon Paul Van Dijk, Roy Werkman, Everhardus Cornelis Mos, Jochem Sebastiaan Wildenberg, Marinus Jochemsen, Bijoy Rajasekharan, Erik Jensen, Adam Jan Urbanczyk
  • Publication number: 20220091514
    Abstract: A method of determining a control parameter for a lithographic process is disclosed, the method includes: defining a substrate model for representing a process parameter fingerprint across a substrate, the substrate model being defined as a combination of basis functions including at least one basis function suitable for representing variation of the process parameter fingerprint between substrates and/or batches of substrates; receiving measurements of the process parameter across at least one substrate; calculating substrate model parameters using the measurements and the basis functions; and determining the control parameter based on the substrate model parameters and the similarity of the at least one basis function to a process parameter fingerprint variation between substrates and/or batches of substrates.
    Type: Application
    Filed: December 18, 2019
    Publication date: March 24, 2022
    Applicant: ASML NETHERLANDS B.V.
    Inventors: Roy WERKMAN, David Frans Simon DECKERS, Bijoy RAJASEKHARAN, Ignacio Salvador VAZQUEZ RODARTE, Sarathi ROY
  • Publication number: 20210389684
    Abstract: A method for optimizing a sequence of processes for manufacturing of product units, includes: associating measurement results of performance parameters (e.g., fingerprints) with the recorded process characteristics (e.g., context); obtaining a characteristic (e.g., context) of a previous process (e.g. deposition) in the sequence already performed on a product unit; obtaining a characteristic (e.g., context) of a subsequent process (e.g., exposure) in the sequence to be performed on the product unit; determining a predicted performance parameter (e.g., fingerprint) of the product unit associated with the sequence of previous and subsequent processes by using the obtained characteristics to retrieve measurement results of the performance parameters (e.g., fingerprints) corresponding to the recorded characteristics; and determining corrections to be applied to future processes (e.g. exposure, etch) in the sequence to be performed on the product unit, based on the determined predicted performance parameter.
    Type: Application
    Filed: August 25, 2021
    Publication date: December 16, 2021
    Applicant: ASML NETHERLANDS B.V.
    Inventors: Jochem Sebastiaan Wildenberg, Marinus Jochemsen, Erik Jensen, Erik Johannes Maria Wallerbos, Cornelis Johannes Rijnierse, Bijoy Rajasekharan, Roy Werkman, Jurgen Johannes Henderikus Maria Schoonus
  • Patent number: 11106141
    Abstract: A method for optimizing a sequence of processes for manufacturing of product units, includes: associating measurement results of performance parameters (e.g., fingerprints) with the recorded process characteristics (e.g., context); obtaining a characteristic (e.g., context) of a previous process (e.g. deposition) in the sequence already performed on a product unit; obtaining a characteristic (e.g., context) of a subsequent process (e.g., exposure) in the sequence to be performed on the product unit; determining a predicted performance parameter (e.g., fingerprint) of the product unit associated with the sequence of previous and subsequent processes by using the obtained characteristics to retrieve measurement results of the performance parameters (e.g., fingerprints) corresponding to the recorded characteristics; and determining corrections to be applied to future processes (e.g. exposure, etch) in the sequence to be performed on the product unit, based on the determined predicted performance parameter.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: August 31, 2021
    Assignee: ASML Netherlands B.V.
    Inventors: Jochem Sebastiaan Wildenberg, Marinus Jochemsen, Erik Jensen, Erik Johannes Maria Wallerbos, Cornelis Johannes Rijnierse, Bijoy Rajasekharan, Roy Werkman, Jurgen Johannes Henderikus Maria Schoonus
  • Publication number: 20200278614
    Abstract: A method for determining a plurality of corrections for control of at least one manufacturing apparatus used in a manufacturing process for providing product structures to a substrate in a plurality of layers, the method including: determining the plurality of corrections including a correction for each layer, based on an actuation potential of the applicable manufacturing apparatus used in the formation of each layer, wherein the determining includes determining corrections for each layer simultaneously in terms of a matching parameter.
    Type: Application
    Filed: November 9, 2018
    Publication date: September 3, 2020
    Applicant: ASML NETHERLANDS B.V.
    Inventors: Roy WERKMAN, Bijoy RAJASEKHARAN, Lydia Marianna VERGAIJ-HUIZER, Jochem Sebastiaan WILDENBERG, Ronald VAN ITTERSUM, Pieter Gerardus Jacobus SMORENBERG, Robertus Wilhelmus VAN DER HEIJDEN, Xiuhong WEI, Hadi YAGUBIZADE
  • Publication number: 20200026200
    Abstract: A method for optimizing a sequence of processes for manufacturing of product units, includes: associating measurement results of performance parameters (e.g., fingerprints) with the recorded process characteristics (e.g., context); obtaining a characteristic (e.g., context) of a previous process (e.g. deposition) in the sequence already performed on a product unit; obtaining a characteristic (e.g., context) of a subsequent process (e.g., exposure) in the sequence to be performed on the product unit; determining a predicted performance parameter (e.g., fingerprint) of the product unit associated with the sequence of previous and subsequent processes by using the obtained characteristics to retrieve measurement results of the performance parameters (e.g., fingerprints) corresponding to the recorded characteristics; and determining corrections to be applied to future processes (e.g. exposure, etch) in the sequence to be performed on the product unit, based on the determined predicted performance parameter.
    Type: Application
    Filed: March 28, 2018
    Publication date: January 23, 2020
    Applicant: ASML NETHERLANDS B.V.
    Inventors: Jochem Sebastiaan WILDENBERG, Marinus JOCHEMSEN, Erik JENSEN, Erik Johannes Maria WALLERBOS, Cornelis Johannes RIJNIERSE, Bijoy RAJASEKHARAN, Roy WERKMAN, Jurgen Johannes Henerikus Maria SCHOONUS
  • Publication number: 20190285992
    Abstract: A method to change an etch parameter of a substrate etching process, the method including: making a first measurement of a first metric associated with a structure on a substrate before being etched; making a second measurement of a second metric associated with a structure on a substrate after being etched; and changing the etch parameter based on a difference between the first measurement and the second measurement.
    Type: Application
    Filed: November 6, 2017
    Publication date: September 19, 2019
    Applicant: ASML NETHERLANDS B.V.
    Inventors: Richard Johannes Franciscus VAN HAREN, Victor Emanuel CALADO, Leon Paul VAN DIJK, Roy WERKMAN, Everhardus Cornelis MOS, Jochem Sebastiaan WILDENBERG, Marinus JOCHEMSEN, Bijoy RAJASEKHARAN, Erik JENSEN, Adam Jan URBANCZYK