Patents by Inventor Yeshwanth Srinivasan

Yeshwanth Srinivasan 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: 11036130
    Abstract: Methods and systems for dispensing fluid in imprint lithography, including selecting drop patterns, each associated with different target locations on a substrate and a selected volume for each drop of each drop pattern; selecting a plurality of subsets of nozzles of a dispenser, each subset configured to dispense drops corresponding to each drop pattern; for each drop pattern: dispensing the drops corresponding to the drop pattern from each subset of nozzles; obtaining an image of the drops from each subset of nozzles; and processing the image from each subset of nozzles to determine a positional error of the drops with respect to the target locations and a volumetric error of the drops with respect to the selected volume for each drop; and adjusting, based on the positional error and the volumetric error of the drops from each subset of nozzles for each drop pattern, dispense parameters of the dispenser.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: June 15, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Matthew C. Traub, Tom H. Rafferty, Whitney Longsine, Yeshwanth Srinivasan, Van Nguyen Truskett
  • Patent number: 10493672
    Abstract: The present invention provides an imprint apparatus which forms a pattern of an imprint material onto a substrate by using a mold, the apparatus including a control unit configured to provide a user interface for displaying a first map indicating a supply position of the imprint material to be supplied onto the substrate, an adjustment window for adjusting a value of an apparatus parameter which is set in the imprint apparatus and used to change a supply position of the imprint material, and a second map indicating a supply position of the imprint material after adjustment of the value of the apparatus parameter.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: December 3, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Sentaro Aihara, Yeshwanth Srinivasan, Steven Wayne Burns
  • Patent number: 10416576
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for aligning a template and a substrate, the method including obtaining a moiré image based on an interaction of light between corresponding features of the template and the substrate, the moiré image including a plurality of moiré fringe strips; compressing each moiré fringe strip of the moiré image by an optical lens array based on a pixel height of an acquisition device, the acquisition device including one or more line scan cameras; processing the compressed moiré image by each of the line scan cameras of the acquisition device to determine a misalignment between the template and the substrate; and based on the determined misalignment, adjusting a relative positioning between the template and the substrate.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: September 17, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seth J. Bamesberger, Yeshwanth Srinivasan, Philip D. Schumaker
  • Publication number: 20190121231
    Abstract: Methods and systems for dispensing fluid in imprint lithography, including selecting drop patterns, each associated with different target locations on a substrate and a selected volume for each drop of each drop pattern; selecting a plurality of subsets of nozzles of a dispenser, each subset configured to dispense drops corresponding to each drop pattern; for each drop pattern: dispensing the drops corresponding to the drop pattern from each subset of nozzles; obtaining an image of the drops from each subset of nozzles; and processing the image from each subset of nozzles to determine a positional error of the drops with respect to the target locations and a volumetric error of the drops with respect to the selected volume for each drop; and adjusting, based on the positional error and the volumetric error of the drops from each subset of nozzles for each drop pattern, dispense parameters of the dispenser.
    Type: Application
    Filed: October 19, 2017
    Publication date: April 25, 2019
    Inventors: Matthew C. Traub, Tom H. Rafferty, Whitney Longsine, Yeshwanth Srinivasan, Van Nguyen Truskett
  • Publication number: 20180370091
    Abstract: The present invention provides an imprint apparatus which forms a pattern of an imprint material onto a substrate by using a mold, the apparatus including a control unit configured to provide a user interface for displaying a first map indicating a supply position of the imprint material to be supplied onto the substrate, an adjustment window for adjusting a value of an apparatus parameter which is set in the imprint apparatus and used to change a supply position of the imprint material, and a second map indicating a supply position of the imprint material after adjustment of the value of the apparatus parameter.
    Type: Application
    Filed: June 26, 2017
    Publication date: December 27, 2018
    Inventors: Sentaro Aihara, Yeshwanth Srinivasan, Steven Wayne Burns
  • Patent number: 10120276
    Abstract: The present invention provides an imprint apparatus which forms a pattern on a substrate by molding an imprint material on the substrate using a mold, comprising a supply unit configured to supply droplets of the imprint material onto the substrate; and a processing unit configured to acquire arrangement patterns of the droplets on the substrate, wherein based on the arrangement pattern corresponding to a first portion of the mold and the arrangement pattern corresponding to a second portion of the mold, the processing unit acquires the arrangement pattern corresponding to a boundary portion between the first portion and the second portion.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: November 6, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Philip D. Schumaker, Yeshwanth Srinivasan, Masahiro Tamura, Takuro Yamazaki
  • Patent number: 9971249
    Abstract: Methods, systems, and apparatus for identifying a non-rectangular shape outline of a first field of a substrate, the first field directly adjacent to a second field; adjusting an exposure profile of an ultraviolet light beam based on the non-rectangular shape outline of the first field to provide a non-rectangular exposure profile of the ultraviolet light beam; disposing a polymerizable composition on the first field of the substrate; contacting the polymerizable composition in the first field with an imprint lithography template; and while contacting the polymerizable composition in the first field with the imprint lithography template, directing the ultraviolet light beam having the non-rectangular exposure profile towards the substrate such that the ultraviolet light beam irradiates only the first field of the substrate.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: May 15, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seth J. Bamesberger, Yeshwanth Srinivasan
  • Publication number: 20180074418
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for aligning a template and a substrate, the method including obtaining a moiré image based on an interaction of light between corresponding features of the template and the substrate, the moiré image including a plurality of moiré fringe strips; compressing each moiré fringe strip of the moiré image by an optical lens array based on a pixel height of an acquisition device, the acquisition device including one or more line scan cameras; processing the compressed moiré image by each of the line scan cameras of the acquisition device to determine a misalignment between the template and the substrate; and based on the determined misalignment, adjusting a relative positioning between the template and the substrate.
    Type: Application
    Filed: September 14, 2016
    Publication date: March 15, 2018
    Inventors: Seth J. Bamesberger, Yeshwanth Srinivasan, Philip D. Schumaker
  • Patent number: 9651862
    Abstract: Imprint lithography methods that incorporate depositing droplets of polymerizable material in patterns that improve fill time performance when employing directionally-oriented imprint templates. The patterns are based on grid arrays formed of repeating sets of rows of droplets oriented along fast and slow axes, with droplets of each row offset along the slow axis relative to droplets in adjacent rows.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: May 16, 2017
    Assignee: Canon Nanotechnologies, Inc.
    Inventors: Edward Brian Fletcher, Gerard M. Schmid, Se-Hyuk Im, Niyaz Khusnatdinov, Yeshwanth Srinivasan, Weijun Liu, Frank Y. Xu
  • Publication number: 20160288404
    Abstract: The present invention provides an imprint apparatus which forms a pattern on a substrate by molding an imprint material on the substrate using a mold, comprising a supply unit configured to supply droplets of the imprint material onto the substrate; and a processing unit configured to acquire arrangement patterns of the droplets on the substrate, wherein based on the arrangement pattern corresponding to a first portion of the mold and the arrangement pattern corresponding to a second portion of the mold, the processing unit acquires the arrangement pattern corresponding to a boundary portion between the first portion and the second portion.
    Type: Application
    Filed: March 31, 2015
    Publication date: October 6, 2016
    Inventors: Philip D. Schumaker, Yeshwanth Srinivasan, Masahiro Tamura, Takuro Yamazaki
  • Publication number: 20150017329
    Abstract: Imprint lithography methods that incorporate depositing droplets of polymerizable material in patterns that improve fill time performance when employing directionally-oriented imprint templates. The patterns are based on grid arrays formed of repeating sets of rows of droplets oriented along fast and slow axes, with droplets of each row offset along the slow axis relative to droplets in adjacent rows.
    Type: Application
    Filed: July 11, 2014
    Publication date: January 15, 2015
    Applicants: Toshiba Corporation, Canon Nanotechnologies, Inc.
    Inventors: Edward Brian Fletcher, Gerard M. Schmid, Se-Hyuk Im, Niyaz Khusnatdinov, Yeshwanth Srinivasan, Weijun Liu, Frank Y. Xu