Patents by Inventor Easwar Srinivasan

Easwar 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).

  • Publication number: 20250096036
    Abstract: A method for selectively depositing graphene on cobalt caps on copper interconnects for dual damascene structures in a back-end-of-line substrate is provided. The method comprises providing a semiconductor substrate comprising a first dielectric layer, the copper interconnect in the first dielectric layer, and the cobalt cap on the copper interconnect, the cobalt cap having an exposed metal surface, wherein the exposed metal surface comprises cobalt, and selectively depositing carbon layer on the exposed metal surface.
    Type: Application
    Filed: July 19, 2022
    Publication date: March 20, 2025
    Inventors: Asish Parbatani, Bart J. Van Schravendijk, Bhadri N. Varadarajan, Ieva Narkeviciute, Easwar Srinivasan, Kashish Sharma, Randolph Knarr, Stefan Schmitz, Vinayak Ramanan, Takeshi Nogami, Son Van Nguyen, Huai Huang, Hosadurga K. Shobha, Juntao Li, Cornelius Brown Peethela, Daniel C. Edelstein
  • Publication number: 20250069882
    Abstract: Methods and apparatuses for depositing silicon nitride in various applications are provided. Embodiments include depositing silicon nitride directly on silicon or silicon oxide surfaces using modulated dose to conversion time ratios in thermal atomic layer deposition. Embodiments include exposing a silicon oxide surface to a nitrogen-containing plasma treatment prior to depositing any silicon nitride and depositing silicon nitride by thermal atomic layer deposition.
    Type: Application
    Filed: December 30, 2022
    Publication date: February 27, 2025
    Inventors: Awnish Gupta, Bart J. Van Schravendijk, Jon Henri, Oksana Savchak, Fengyan Wei, Easwar Srinivasan
  • Patent number: 12229634
    Abstract: Systems and techniques that facilitate Stark shift cancellation are provided. In various embodiments, a system can comprise a control qubit that is coupled to a target qubit. In various cases, the control qubit can be driven by a first tone that entangles the control qubit with the target qubit. In various aspects, the control qubit can be further driven by a second tone simultaneously with the first tone. In various cases, the second tone can have an opposite detuning sign than the first tone. In various instances, the first tone can cause a Stark shift in an operational frequency of the control qubit, and the second tone can cancel the Stark shift.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: February 18, 2025
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Abhinav Kandala, David C. Mckay, Srikanth Srinivasan, Easwar Magesan, Jay Michael Gambetta
  • Patent number: 12209310
    Abstract: The present disclosure relates, in part, to an apparatus for controlling the concentration of a component within a gas mixture. In particular embodiments, the component is a vaporized liquid component, such as a vaporized stabilizer or a vaporized precursor. Also described are systems thereof and methods for such control.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: January 28, 2025
    Assignee: Lam Research Corporation
    Inventors: Ramesh Chandrasekharan, Easwar Srinivasan, Erica Sakura Strandberg Pohl, Andrew Borth, Aleksey V. Altecor
  • Publication number: 20250014890
    Abstract: The present disclosure relates to methods for providing a silicon nitride film. In particular, the film can be a carbon-doped, silicon nitride film. Methods can include depositing a doped silicon nitride and then plasma treating the doped silicon nitride to provide a conformal film.
    Type: Application
    Filed: November 30, 2022
    Publication date: January 9, 2025
    Inventors: Awnish Gupta, Bart J. Van Schravendijk, Jon Henri, Oksana Savchak, Fengyan Wei, Easwar Srinivasan, Dustin Zachary Austin
  • Publication number: 20240410053
    Abstract: Methods and apparatus for forming silicon oxide using chlorosilane and aminosilane precursors are provided herein.
    Type: Application
    Filed: December 19, 2022
    Publication date: December 12, 2024
    Inventors: Awnish Gupta, Bart J. van Schravendijk, Jon Henri, Fengyan Wei, Oksana Savchak, Easwar Srinivasan
  • Publication number: 20240395569
    Abstract: A method includes configuring N heater zones to heat a component of a substrate processing system, where N is an integer greater than 1, and where each of the N heater zones includes a resistive heater and a temperature sensor to sense a local temperature. The method includes determining an average temperature of each of the N heater zones based on a resistance of the resistive heater in each of the N heater zones. The method includes controlling the resistive heater based on the average temperature and the local temperature in each of the N heater zones.
    Type: Application
    Filed: August 6, 2024
    Publication date: November 28, 2024
    Inventors: Ramesh CHANDRASEKHARAN, Easwar Srinivasan
  • Publication number: 20240387226
    Abstract: A remote plasma processing apparatus with an electrostatic chuck can deposit film on a semiconductor substrate by atomic layer deposition or chemical vapor deposition. The remote plasma processing apparatus can include a remote plasma source and a reaction chamber downstream from the remote plasma source. An RF power source can be configured to apply high RF power to the remote plasma source and heating elements can be configured to apply high temperatures to the electrostatic chuck. The semiconductor substrate can be dechucked from the electrostatic chuck using a declamping routine that alternates reversing polarities and reducing clamping voltages. In some embodiments, silicon nitride film can be conformally deposited by atomic layer deposition using a mixture of nitrogen, ammonia, and hydrogen gases as a source gas for remote plasma generation.
    Type: Application
    Filed: September 15, 2022
    Publication date: November 21, 2024
    Inventors: Aaron Blake MILLER, Aaron DURBIN, Jon HENRI, Easwar SRINIVASAN, Bradley Taylor STRENG, Awnish GUPTA, Bart J. VAN SCHRAVENDIJK, Fengyan WEI, Noah Elliot BAKER
  • Patent number: 12062554
    Abstract: A heater control system for a gas delivery system of a substrate processing system includes an oven, N resistive uninsulated heaters arranged inside of the oven, where N is an integer greater than one, and a controller. The oven encloses one or more components of the substrate processing system and to maintain a predetermined temperature in the oven. Each of the N resistive heaters selectively heats at least a portion of one of the components in the oven. The controller is configured to maintain the predetermined temperature in localized regions in the oven by determining a resistance in each of the N resistive heaters and adjusting power to each of the N resistive heaters based on N-1 resistance ratios of N-1 of the N resistive heaters relative to one of the N resistive heaters.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: August 13, 2024
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Ramesh Chandrasekharan, Easwar Srinivasan
  • Publication number: 20240213159
    Abstract: A method for selectively depositing graphene on a metal surface in a back-end-of-line substrate is provided. The method comprises providing the substrate comprising a first dielectric layer and a copper interconnect in the first dielectric layer, the copper interconnect having an exposed metal surface, wherein the exposed metal surface comprises copper, and selectively deposing a carbon layer on the exposed metal surface.
    Type: Application
    Filed: July 19, 2022
    Publication date: June 27, 2024
    Inventors: Asish Parbatani, Bart J. van Schravendijk, Bhadri N. Varadarajan, Ieva Narkeviciute, Easwar Srinivasan, Kashish Sharma, Randolph Knarr, Stefan Schmitz, Vinayak Ramanan
  • Patent number: 11955366
    Abstract: An assembly used in a process chamber for depositing a film on a wafer. A pedestal assembly includes a pedestal movably mounted to a main frame. A lift pad rests upon the pedestal and moves with the pedestal assembly. A raising mechanism separates the lift pad from the pedestal, and includes a hard stop fixed to the main frame, a roller attached to the pedestal assembly, a slide moveably attached to the pedestal assembly, a lift pad bracket interconnected to the slide and a pad shaft extending from the lift pad, and a lever rotatably attached to the lift pad bracket. The lever rests on the roller when not engaged with the upper hard stop. When the pedestal assembly moves upwards, the lever rotates about a pin when engaging the upper hard stop and roller, and separates the lift pad from the pedestal by a process rotation displacement.
    Type: Grant
    Filed: July 12, 2022
    Date of Patent: April 9, 2024
    Assignee: Lam Research Corporation
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan
  • Publication number: 20230257878
    Abstract: The present disclosure relates, in part, to an apparatus for controlling the concentration of a component within a gas mixture. In particular embodiments, the component is a vaporized liquid component, such as a vaporized stabilizer or a vaporized precursor. Also described are systems thereof and methods for such control.
    Type: Application
    Filed: July 21, 2021
    Publication date: August 17, 2023
    Inventors: Ramesh Chandrasekharan, Easwar Srinivasan, Erica Sakura Strandberg Pohl, Andrew Borth, Aleksey V. Altecor
  • Publication number: 20220352004
    Abstract: An assembly used in a process chamber for depositing a film on a wafer. A pedestal assembly includes a pedestal movably mounted to a main frame. A lift pad rests upon the pedestal and moves with the pedestal assembly. A raising mechanism separates the lift pad from the pedestal, and includes a hard stop fixed to the main frame, a roller attached to the pedestal assembly, a slide moveably attached to the pedestal assembly, a lift pad bracket interconnected to the slide and a pad shaft extending from the lift pad, and a lever rotatably attached to the lift pad bracket. The lever rests on the roller when not engaged with the upper hard stop. When the pedestal assembly moves upwards, the lever rotates about a pin when engaging the upper hard stop and roller, and separates the lift pad from the pedestal by a process rotation displacement.
    Type: Application
    Filed: July 12, 2022
    Publication date: November 3, 2022
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan
  • Patent number: 11387136
    Abstract: An assembly used in a process chamber for depositing a film on a wafer. A pedestal assembly includes a pedestal movably mounted to a main frame. A lift pad rests upon the pedestal and moves with the pedestal assembly. A raising mechanism separates the lift pad from the pedestal, and includes a hard stop fixed to the main frame, a roller attached to the pedestal assembly, a slide moveably attached to the pedestal assembly, a lift pad bracket interconnected to the slide and a pad shaft extending from the lift pad, and a lever rotatably attached to the lift pad bracket. The lever rests on the roller when not engaged with the upper hard stop. When the pedestal assembly moves upwards, the lever rotates about a pin when engaging the upper hard stop and roller, and separates the lift pad from the pedestal by a process rotation displacement.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: July 12, 2022
    Assignee: Lam Research Corporation
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan
  • Patent number: 11183400
    Abstract: A heater control system for heating components of a substrate processing system includes N heater zones, where N is an integer greater than zero. Each of the N heater zones heats a component of the substrate processing system and includes a resistive heater and a temperature sensor to sense a local temperature in a corresponding one of the N heater zones. A controller is configured to determine an average temperature of each of the N heater zones based on a resistance of the resistive heater in each of the N heater zones. The controller controls the resistive heater based on the average temperature and the local temperature in each of the N heater zones.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: November 23, 2021
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Ramesh Chandrasekharan, Easwar Srinivasan
  • Patent number: 11056380
    Abstract: An assembly used in a process chamber for depositing a film on a wafer and including a pedestal extending from a central axis. An actuator is configured for controlling movement of the pedestal. A central shaft extends between the actuator and pedestal, the central shaft configured to move the pedestal along the central axis. A lift pad is configured to rest upon the pedestal and having a pad top surface configured to support a wafer placed thereon. A pad shaft extends between the actuator and the lift pad and controls movement of the lift pad. The pad shaft is positioned within the central shaft and is configured to separate the lift pad from the pedestal top surface by a process rotation displacement when the pedestal is in an upwards position. The pad shaft is configured to rotate relative to the pedestal top surface between first and second angular orientations.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: July 6, 2021
    Assignee: Lam Research Corporation
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan
  • Patent number: 10872747
    Abstract: A showerhead for a plasma chamber comprises a resistive heater configured to receive power to heat the showerhead of the plasma chamber, and a resistive element thermally bonded to the showerhead of the plasma chamber. The resistive element changes resistance in response to a change in temperature of the showerhead. The resistive element is encapsulated in an insulating material to electrically insulate the resistive element from the showerhead. The insulating material is a good conductor of heat. The power to the resistive heater is received based on the resistance of the resistive element.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: December 22, 2020
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Nick Ray Linebarger, Jr., Curtis W. Bailey, Easwar Srinivasan, Devon Pelkey
  • Patent number: 10870922
    Abstract: An assembly used in a process chamber for depositing a film on a wafer including a pedestal assembly having a pedestal movably mounted to a main frame. A lift pad rests upon the pedestal and moves with the pedestal. A raising mechanism separates the pad from the pedestal, and includes a hard stop fixed to the main frame, a roller attached to the pedestal assembly, a slide moveably attached to the pedestal assembly, a lift pad bracket interconnected to the slide and a pad shaft extending from the lift pad, a lever rotatably attached to lift pad bracket, a ferroseal assembly surrounding the pad shaft, and a yoke assembly offsetting a moment to the ferroseal assembly when the lever rotates. When the pedestal assembly moves upwards, the lever rotates when engaging with the upper hard stop and roller, and separates the pad from the pedestal by a process rotation displacement.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: December 22, 2020
    Assignee: Lam Research Corporation
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan
  • Publication number: 20200312703
    Abstract: An assembly used in a process chamber for depositing a film on a wafer and including a pedestal extending from a central axis. An actuator is configured for controlling movement of the pedestal. A central shaft extends between the actuator and pedestal, the central shaft configured to move the pedestal along the central axis. A lift pad is configured to rest upon the pedestal and having a pad top surface configured to support a wafer placed thereon. A pad shaft extends between the actuator and the lift pad and controls movement of the lift pad. The pad shaft is positioned within the central shaft and is configured to separate the lift pad from the pedestal top surface by a process rotation displacement when the pedestal is in an upwards position. The pad shaft is configured to rotate relative to the pedestal top surface between first and second angular orientations.
    Type: Application
    Filed: June 16, 2020
    Publication date: October 1, 2020
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan
  • Patent number: 10699937
    Abstract: An assembly used in a process chamber for depositing a film on a wafer and including a pedestal extending from a central axis. An actuator is configured for controlling movement of the pedestal. A central shaft extends between the actuator and pedestal, the central shaft configured to move the pedestal along the central axis. A lift pad is configured to rest upon the pedestal and having a pad top surface configured to support a wafer placed thereon. A pad shaft extends between the actuator and the lift pad and controls movement of the lift pad. The pad shaft is positioned within the central shaft and is configured to separate the lift pad from the pedestal top surface by a process rotation displacement when the pedestal is in an upwards position. The pad shaft is configured to rotate relative to the pedestal top surface between first and second angular orientations.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: June 30, 2020
    Assignee: Lam Research Corporation
    Inventors: Paul Konkola, Karl F. Leeser, Easwar Srinivasan