Patents by Inventor Thomas G. Jewell

Thomas G. Jewell 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: 11028482
    Abstract: A method for controlling temperature of a substrate support includes receiving first and second currents corresponding to first and second heater elements, respectively, of a substrate support, receiving first and second voltages corresponding to the first and second heater elements, respectively, calculating a first resistance of the first heater element based on the first voltage and the first current, calculating a second resistance of the second heater element based on the second voltage and the second current, calculating a first temperature of a first zone of the substrate support based on the first resistance and stored data correlating resistances to temperatures, calculating a second temperature of a second zone of the substrate support based on the second resistance and the stored data, and selectively adjusting the stored data based on a comparison between a sensed temperature and at least one of the calculated first temperature and second temperature.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: June 8, 2021
    Assignee: Lam Research Corporation
    Inventors: Aaron Durbin, Ramesh Chandrasekharan, Dirk Rudolph, Thomas G. Jewell
  • Publication number: 20200255945
    Abstract: A method for controlling temperature of a substrate support includes receiving first and second currents corresponding to first and second heater elements, respectively, of a substrate support, receiving first and second voltages corresponding to the first and second heater elements, respectively, calculating a first resistance of the first heater element based on the first voltage and the first current, calculating a second resistance of the second heater element based on the second voltage and the second current, calculating a first temperature of a first zone of the substrate support based on the first resistance and stored data correlating resistances to temperatures, calculating a second temperature of a second zone of the substrate support based on the second resistance and the stored data, and selectively adjusting the stored data based on a comparison between a sensed temperature and at least one of the calculated first temperature and second temperature.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 13, 2020
    Inventors: Aaron DURBIN, Ramesh Chandrasekharan, Dirk Rudolph, Thomas G. Jewell
  • Patent number: 10633742
    Abstract: A controller for a substrate processing system includes a resistance calculation module configured to receive a first current and a second current corresponding to a first heater element and a second heater element, respectively, of a substrate support, receive a first voltage and a second voltage corresponding to the first heater element and the second heater element, respectively, calculate a first resistance of the first heater element based on the first voltage and the first current, and calculate a second resistance of the second heater element based on the second voltage and the second current. A temperature control module is configured to separately control power provided to the first heater element and the second heater element based on the first resistance and the second resistance, respectively, and respective relationships between the first and second resistances and first and second temperatures of the substrate support.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: April 28, 2020
    Assignee: LAM RESEARCH FOUNDATION
    Inventors: Aaron Durbin, Ramesh Chandrasekharan, Dirk Rudolph, Thomas G. Jewell
  • Publication number: 20190338422
    Abstract: A controller for a substrate processing system includes a resistance calculation module configured to receive a first current and a second current corresponding to a first heater element and a second heater element, respectively, of a substrate support, receive a first voltage and a second voltage corresponding to the first heater element and the second heater element, respectively, calculate a first resistance of the first heater element based on the first voltage and the first current, and calculate a second resistance of the second heater element based on the second voltage and the second current. A temperature control module is configured to separately control power provided to the first heater element and the second heater element based on the first resistance and the second resistance, respectively, and respective relationships between the first and second resistances and first and second temperatures of the substrate support.
    Type: Application
    Filed: May 7, 2018
    Publication date: November 7, 2019
    Inventors: Aaron DURBIN, Ramesh CHANDRASEKHARAN, Dirk RUDOLPH, Thomas G. JEWELL
  • Patent number: 8985152
    Abstract: A point-of-use valve (POU valve) manifold is provided that allows for multiple precursors to be delivered to a semiconductor processing chamber through a common outlet. The manifold may have a plurality of precursor inlets and a purge gas inlet. The manifold may be configured such that there are zero dead legs in the manifold when the purge gas is routed through the manifold, and may provide mounting location for the POU valves that alternate sides. One or more internal flow path volumes may include elbow features.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: March 24, 2015
    Assignee: Novellus Systems, Inc.
    Inventors: Ramesh Chandrasekharan, Chunguang Xia, Karl F. Leeser, Damien Slevin, Thomas G. Jewell
  • Publication number: 20130333768
    Abstract: A point-of-use valve (POU valve) manifold is provided that allows for multiple precursors to be delivered to a semiconductor processing chamber through a common outlet. The manifold may have a plurality of precursor inlets and a purge gas inlet. The manifold may be configured such that there are zero dead legs in the manifold when the purge gas is routed through the manifold, and may provide mounting location for the POU valves that alternate sides. One or more internal flow path volumes may include elbow features.
    Type: Application
    Filed: September 25, 2012
    Publication date: December 19, 2013
    Inventors: Ramesh Chandrasekharan, Chunguang Xia, Karl F. Leeser, Damien Slevin, Thomas G. Jewell