Patents by Inventor KALYANJIT GHOSH

KALYANJIT GHOSH 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: 12087555
    Abstract: Implementations disclosed herein generally relate to systems and methods of protecting a substrate support in a process chamber from cleaning fluid during a cleaning process. The method of cleaning the process chamber includes positioning in the process chamber a cover substrate above a substrate support and a process kit that separates a purge volume from a process volume. The method of cleaning includes flowing a purge gas in the purge volume to protect the substrate support and flowing a cleaning fluid to a process volume above the cover substrate, flowing the cleaning fluid in the process volume to an outer flow path, and to an exhaust outlet in the chamber body. The purge volume is maintained at a positive pressure with respect to the process volume to block the cleaning fluid from the purge volume.
    Type: Grant
    Filed: December 16, 2022
    Date of Patent: September 10, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Kalyanjit Ghosh, Shailendra Srivastava, Tejas Ulavi, Yusheng Zhou, Amit Kumar Bansal, Sanjeev Baluja
  • Publication number: 20240247371
    Abstract: A processing chamber may include a gas distribution member, a substrate support, and a pumping liner. The gas distribution member and the substrate support may at least in part define a processing volume. The pumping liner may define an internal volume in fluid communication with the processing volume via a plurality of apertures of the pumping liner circumferentially disposed about the processing volume. The processing chamber may further include a flow control mechanism operable to direct fluid flow from the internal volume of the pumping liner into the processing volume via a subset of the plurality of apertures of the pumping liner during fluid distribution into the processing volume from the gas distribution member.
    Type: Application
    Filed: April 3, 2024
    Publication date: July 25, 2024
    Applicant: Applied Materials, Inc.
    Inventors: Nitin Pathak, Yuxing Zhang, Tuan A. Nguyen, Kalyanjit Ghosh, Amit Bansal, Juan Carlos Rocha-Alvarez
  • Patent number: 12044704
    Abstract: A modular probe array for making temporary electrical contact to devices under test is provided. The probe array includes multiple probe heads each having a substrate disposed within a mounting block. Improved thermal cycling performance is obtained by using an O-ring between the substrate and the mounting block. Optionally, set screws can be used in combination with the O-ring to set the position of the substrate in its mounting block.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: July 23, 2024
    Assignee: FormFactor, Inc.
    Inventors: Kalyanjit Ghosh, Douglas Stewart Ondricek, Paul Hsiao
  • Patent number: 11952660
    Abstract: A processing chamber may include a gas distribution member, a substrate support, and a pumping liner. The gas distribution member and the substrate support may at least in part define a processing volume. The pumping liner may define an internal volume in fluid communication with the processing volume via a plurality of apertures of the pumping liner circumferentially disposed about the processing volume. The processing chamber may further include a flow control mechanism operable to direct fluid flow from the internal volume of the pumping liner into the processing volume via a subset of the plurality of apertures of the pumping liner during fluid distribution into the processing volume from the gas distribution member.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: April 9, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Nitin Pathak, Yuxing Zhang, Tuan A. Nguyen, Kalyanjit Ghosh, Amit Bansal, Juan Carlos Rocha-Alvarez
  • Publication number: 20230128297
    Abstract: Implementations disclosed herein generally relate to systems and methods of protecting a substrate support in a process chamber from cleaning fluid during a cleaning process. The method of cleaning the process chamber includes positioning in the process chamber a cover substrate above a substrate support and a process kit that separates a purge volume from a process volume. The method of cleaning includes flowing a purge gas in the purge volume to protect the substrate support and flowing a cleaning fluid to a process volume above the cover substrate, flowing the cleaning fluid in the process volume to an outer flow path, and to an exhaust outlet in the chamber body. The purge volume is maintained at a positive pressure with respect to the process volume to block the cleaning fluid from the purge volume.
    Type: Application
    Filed: December 16, 2022
    Publication date: April 27, 2023
    Inventors: Kalyanjit GHOSH, Shailendra SRIVASTAVA, Tejas ULAVI, Yusheng ZHOU, Amit Kumar BANSAL, Sanjeev BALUJA
  • Patent number: 11532462
    Abstract: Implementations disclosed herein generally relate to systems and methods of protecting a substrate support in a process chamber from cleaning fluid during a cleaning process. The method of cleaning the process chamber includes positioning in the process chamber a cover substrate above a substrate support and a process kit that separates a purge volume from a process volume. The method of cleaning includes flowing a purge gas in the purge volume to protect the substrate support and flowing a cleaning fluid to a process volume above the cover substrate, flowing the cleaning fluid in the process volume to an outer flow path, and to an exhaust outlet in the chamber body. The purge volume is maintained at a positive pressure with respect to the process volume to block the cleaning fluid from the purge volume.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: December 20, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Kalyanjit Ghosh, Shailendra Srivastava, Tejas Ulavi, Yusheng Zhou, Amit Kumar Bansal, Sanjeev Baluja
  • Patent number: 11512391
    Abstract: A processing chamber for processing a substrate is disclosed herein. In one embodiment, the processing chamber includes a liner assembly disposed within an interior volume of the processing chamber, and a C-channel disposed in an interior volume of the chamber, circumscribing the liner assembly. In another embodiment, a process kit disposed in the interior volume of the processing chamber is disclosed herein. The process kit includes a liner assembly, a C-channel, and an isolator disposed in the interior volume. The C-channel and the isolator circumscribe the liner assembly. A method for depositing a silicon based material on a substrate by flowing a precursor gas into a processing chamber is also described herein.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: November 29, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Kalyanjit Ghosh, Mayur G. Kulkarni, Sanjeev Baluja, Kien N. Chuc, Sungjin Kim, Yanjie Wang
  • Patent number: 11508611
    Abstract: Implementations disclosed herein generally provide a lift pin that can improve the deposition rate and uniform film thickness above lift pin areas. In one implementation, the lift pin includes a first end coupling to a shaft, the first end having a pin head, and the pin head having a top surface, wherein the top surface is planar and flat, and a second end coupling to the shaft, the second end having a flared portion, wherein the flared portion has an outer surface extended along a direction that is at an angle of about 110° to about 140° with respect to a longitudinal axis of the lift pin.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: November 22, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Kalyanjit Ghosh, Mayur G. Kulkarni, Sanjeev Baluja, Praket P. Jha, Krishna Nittala
  • Publication number: 20220276281
    Abstract: A modular probe array for making temporary electrical contact to devices under test is provided. The probe array includes multiple probe heads each having a substrate disposed within a mounting block. Improved thermal cycling performance is obtained by using an O-ring between the substrate and the mounting block. Optionally, set screws can be used in combination with the O-ring to set the position of the substrate in its mounting block.
    Type: Application
    Filed: February 28, 2022
    Publication date: September 1, 2022
    Inventors: Kalyanjit Ghosh, Doug Ondricek, Paul Hsiao
  • Patent number: 11078568
    Abstract: The present disclosure relates to pumping devices, components thereof, and methods associated therewith for substrate processing chambers. In one example, a pumping ring for substrate processing chambers includes a body. The body includes an upper wall, a lower wall, an inner radial wall, and an outer radial wall. The pumping ring also includes an annulus defined by the upper wall, the lower wall, the inner radial wall, and the outer radial wall. The pumping ring also includes a first exhaust port in the body that is fluidly coupled to the annulus, and a second exhaust port in the body that is fluidly coupled to the annulus. The pumping ring also includes a first baffle disposed in the annulus adjacent to the first exhaust port, and a second baffle disposed in the annulus adjacent to the second exhaust port.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: August 3, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Kalyanjit Ghosh, David Blahnik, Amit Kumar Bansal, Tuan Anh Nguyen
  • Patent number: 11047043
    Abstract: Embodiments disclosed herein generally relate to a chamber liner for the high temperature processing of substrates in a processing chamber. The processing chamber utilizes an inert bottom purge flow to shield the substrate support from halogen reactants such that the substrate support may be heated to temperatures greater than about 650 degrees Celsius. The chamber liner controls a flow profile such that during deposition the bottom purge flow restricts reactants and by-products from depositing below the substrate support. During a clean process, the bottom purge flow restricts halogen reactants from contacting the substrate support. As such, the chamber liner includes a conical inner surface angled inwardly to direct purge gases around an edge of the substrate support and to reduce deposition under the substrate support and the on the edge.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: June 29, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Sanjeev Baluja, Ren-Guan Duan, Kalyanjit Ghosh
  • Patent number: 11031262
    Abstract: Implementations disclosed herein describe a bevel etch apparatus within a loadlock bevel etch chamber and methods of using the same. The bevel etch apparatus has a mask assembly within the loadlock bevel etch chamber. During an etch process, the mask assembly delivers a gas flow to control bevel etch without the use of a shadow frame. As such, the edge exclusion at the bevel edge can be reduced, thus increasing product yield.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: June 8, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Saptarshi Basu, Jeongmin Lee, Paul Connors, Dale R. Du Bois, Prashant Kumar Kulshreshtha, Karthik Thimmavajjula Narasimha, Brett Berens, Kalyanjit Ghosh, Jianhua Zhou, Ganesh Balasubramanian, Kwangduk Douglas Lee, Juan Carlos Rocha-Alvarez, Hiroyuki Ogiso, Liliya Krivulina, Rick Gilbert, Mohsin Waqar, Venkatanarayana Shankaramurthy, Hari K. Ponnekanti
  • Publication number: 20210032747
    Abstract: A processing chamber may include a gas distribution member, a substrate support, and a pumping liner. The gas distribution member and the substrate support may at least in part define a processing volume. The pumping liner may define an internal volume in fluid communication with the processing volume via a plurality of apertures of the pumping liner circumferentially disposed about the processing volume. The processing chamber may further include a flow control mechanism operable to direct fluid flow from the internal volume of the pumping liner into the processing volume via a subset of the plurality of apertures of the pumping liner during fluid distribution into the processing volume from the gas distribution member.
    Type: Application
    Filed: July 22, 2020
    Publication date: February 4, 2021
    Applicant: Applied Materials, Inc.
    Inventors: Nitin Pathak, Yuxing Zhang, Tuan A. Nguyen, Kalyanjit Ghosh, Amit Bansal, Juan C. Rocha
  • Patent number: 10907252
    Abstract: Embodiments herein relate to gas distribution apparatuses. In one aspect, the disclosure herein relates to a showerhead including a body having an upper surface and a lower surface. A thermal choke is disposed adjacent a perimeter of the body. The thermal choke includes a plurality of interleaved channels. One or more apertures are disposed between the upper surface and the lower surface of the body.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: February 2, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Yuxing Zhang, Daniel Hwung, Ashutosh Agarwal, Kaushik Alayavalli, Kalyanjit Ghosh
  • Patent number: 10889894
    Abstract: A faceplate for a processing chamber is disclosed. The faceplate has a body with a plurality of apertures formed therethrough. A flexure is formed in the body partially circumscribing the plurality of apertures. A cutout is formed through the body on a common radius with the flexure. One or more bores extend from a radially inner surface of the cutout to an outer surface of the body. A heater is disposed between flexure and the plurality of apertures. The flexure and the cutout are thermal chokes which limit heat transfer thereacross from the heater.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: January 12, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Daniel Hwung, Yuxing Zhang, Kalyanjit Ghosh, Kaushik Alayavalli, Amit Kumar Bansal
  • Publication number: 20200325577
    Abstract: A processing chamber for processing a substrate is disclosed herein. In one embodiment, the processing chamber includes a liner assembly disposed within an interior volume of the processing chamber, and a C-channel disposed in an interior volume of the chamber, circumscribing the liner assembly. In another embodiment, a process kit disposed in the interior volume of the processing chamber is disclosed herein. The process kit includes a liner assembly, a C-channel, and an isolator disposed in the interior volume. The C-channel and the isolator circumscribe the liner assembly. A method for depositing a silicon based material on a substrate by flowing a precursor gas into a processing chamber is also described herein.
    Type: Application
    Filed: June 25, 2020
    Publication date: October 15, 2020
    Inventors: Kalyanjit GHOSH, Mayur G. KULKARNI, Sanjeev BALUJA, Kien N. CHUC, Sungjin KIM, Yanjie WANG
  • Publication number: 20200251311
    Abstract: Implementations disclosed herein generally relate to systems and methods of protecting a substrate support in a process chamber from cleaning fluid during a cleaning process. The method of cleaning the process chamber includes positioning in the process chamber a cover substrate above a substrate support and a process kit that separates a purge volume from a process volume. The method of cleaning includes flowing a purge gas in the purge volume to protect the substrate support and flowing a cleaning fluid to a process volume above the cover substrate, flowing the cleaning fluid in the process volume to an outer flow path, and to an exhaust outlet in the chamber body. The purge volume is maintained at a positive pressure with respect to the process volume to block the cleaning fluid from the purge volume.
    Type: Application
    Filed: April 22, 2020
    Publication date: August 6, 2020
    Inventors: Kalyanjit GHOSH, Shailendra SRIVASTAVA, Tejas ULAVI, Yusheng ZHOU, Amit Kumar BANSAL, Sanjeev BALUJA
  • Patent number: 10724138
    Abstract: A processing chamber for processing a substrate is disclosed herein. In one embodiment, the processing chamber includes a liner assembly disposed within an interior volume of the processing chamber, and a C-channel disposed in an interior volume of the chamber, circumscribing the liner assembly. In another embodiment, a process kit disposed in the interior volume of the processing chamber is disclosed herein. The process kit includes a liner assembly, a C-channel, and an isolator disposed in the interior volume. The C-channel and the isolator circumscribe the liner assembly. A method for depositing a silicon based material on a substrate by flowing a precursor gas into a processing chamber is also described herein.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: July 28, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Kalyanjit Ghosh, Mayur G. Kulkarni, Sanjeev Baluja, Kien N. Chuc, Sungjin Kim, Yanjie Wang
  • Publication number: 20200234982
    Abstract: Implementations disclosed herein describe a bevel etch apparatus within a loadlock bevel etch chamber and methods of using the same. The bevel etch apparatus has a mask assembly within the loadlock bevel etch chamber. During an etch process, the mask assembly delivers a gas flow to control bevel etch without the use of a shadow frame. As such, the edge exclusion at the bevel edge can be reduced, thus increasing product yield.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Inventors: Saptarshi BASU, Jeongmin LEE, Paul CONNORS, Dale R. DU BOIS, Prashant Kumar KULSHRESHTHA, Karthik Thimmavajjula NARASIMHA, Brett BERENS, Kalyanjit GHOSH, Jianhua ZHOU, Ganesh BALASUBRAMANIAN, Kwangduk Douglas LEE, Juan Carlos ROCHA-ALVAREZ, Hiroyuki OGISO, Liliya KRIVULINA, Rick GILBERT, Mohsin WAQAR, Venkatanarayana SHANKARAMURTHY, Hari K. PONNEKANTI
  • Publication number: 20200216952
    Abstract: The present disclosure relates to pumping devices, components thereof, and methods associated therewith for substrate processing chambers. In one example, a pumping ring for substrate processing chambers includes a body. The body includes an upper wall, a lower wall, an inner radial wall, and an outer radial wall. The pumping ring also includes an annulus defined by the upper wall, the lower wall, the inner radial wall, and the outer radial wall. The pumping ring also includes a first exhaust port in the body that is fluidly coupled to the annulus, and a second exhaust port in the body that is fluidly coupled to the annulus. The pumping ring also includes a first baffle disposed in the annulus adjacent to the first exhaust port, and a second baffle disposed in the annulus adjacent to the second exhaust port.
    Type: Application
    Filed: November 15, 2019
    Publication date: July 9, 2020
    Inventors: Kalyanjit GHOSH, David BLAHNIK, Amit Kumar BANSAL, Tuan Anh NGUYEN