Patents by Inventor Rish Chhatre

Rish Chhatre 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: 20210225616
    Abstract: Components and processes are disclosed herein for managing non-volatile and/or low-volatility byproduct materials that are generated within a plasma processing region of a plasma processing chamber during performance of various plasma-based processes on a substrate. The components include a top window structure, a liner structure, an edge ring structure, a focus ring structure, a ground ring structure, a substrate access port shield, an insert liner for a port opening in a chamber wall, and an exhaust baffle assembly for positioning within an exhaust channel connected to the chamber. One or more process-exposed surface(s) of the various components are subjected to a surface roughening/texturizing process to impart a surface roughness and/or engineered topography to the process-exposed surface that promotes adhesion and retention of plasma process byproduct materials.
    Type: Application
    Filed: January 7, 2019
    Publication date: July 22, 2021
    Inventors: Gordon Wen-Yin Peng, Ambarish (Rish) Chhatre, Dan Marohl, Tamarak Pandhumsoporn, Ignacio (Nacho) Chazaro
  • Patent number: 9947512
    Abstract: An improved gas injection assembly for mounting in a central bore of a dielectric window of an inductively coupled plasma chamber includes a window having a central bore and cylindrical recess configured to receive an annular insert having a bayonet opening. The gas injector assembly includes a gas injector, an RF shield surrounding the gas injector, and a faceplate surrounding the RF shield, the faceplate including projections at the bottom thereof for engaging the bayonet opening in the annular insert. The window and gas injection assembly are designed to avoid chipping of the window which is typically made of quartz and in prior mounting arrangements the window has a bayonet opening machined therein. Due to the brittle nature of the quartz material, the machined bayonet opening was subject to chipping when the gas injector assembly was inserted into the bayonet opening.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: April 17, 2018
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Rish Chhatre, David Schaefer
  • Patent number: 9583377
    Abstract: An installation fixture adapted to mount an elastomer band in a mounting groove around a semiconductor substrate support used for supporting a semiconductor substrate in a plasma processing chamber is disclosed, which includes an annular ring having a vertically extending portion on an outer edge of the ring and adapted to receive the elastomer band, and a base plate configured to be attached to the annular ring, the base plate having a plurality of radially extending portions adapted to receive a plurality of mechanical fasteners at locations corresponding to mounting holes in the semiconductor substrate support.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: February 28, 2017
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Rish Chhatre, David Schaefer
  • Patent number: 9355884
    Abstract: A kit comprising an installation fixture, a plurality of mechanical fasteners and an embedding tool is provided which allows for an elastomer band to be disposed in a mounting groove around a semiconductor substrate support in a manner that relieves the internal stresses of the elastomer band, leading to an elastomer band with a longer operational lifetime. The installation fixture is secured to a substrate support with mechanical fasteners. An elastomer band is placed around an outer circumference of the installation fixture and rotated back and forth to relieve internal stresses of the elastomer band. The fixture is inverted and the elastomer band is slid vertically off the fixture and into the mounting groove. An embedding tool can be used to completely insert the elastomer band into the mounting groove.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: May 31, 2016
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
  • Patent number: 9105676
    Abstract: A method of removing an epoxy band from an electrostatic chuck includes securing the electrostatic chuck in a servicing fixture, applying a thermal source to the epoxy band to breakdown a plurality of adhesive bonds securing the epoxy band to the electrostatic chuck, forming a hole in the epoxy band and pulling the epoxy band from the electrostatic chuck. A system for removing an epoxy band from an electrostatic chuck is also described.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: August 11, 2015
    Assignee: Lam Research Corporation
    Inventors: Hong Shih, Tuochuan Huang, Yan Fang, Cliff LaCroix, Neal Newton, Rish Chhatre
  • Publication number: 20150170942
    Abstract: An installation fixture adapted to mount an elastomer band in a mounting groove around a semiconductor substrate support used for supporting a semiconductor substrate in a plasma processing chamber is disclosed, which includes an annular ring having a vertically extending portion on an outer edge of the ring and adapted to receive the elastomer band, and a base plate configured to be attached to the annular ring, the base plate having a plurality of radially extending portions adapted to receive a plurality of mechanical fasteners at locations corresponding to mounting holes in the semiconductor substrate support.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 18, 2015
    Applicant: Lam Research Corporation
    Inventors: Rish Chhatre, David Schaefer
  • Publication number: 20140366360
    Abstract: A kit comprising an installation fixture, a plurality of mechanical fasteners and an embedding tool is provided which allows for an elastomer band to be disposed in a mounting groove around a semiconductor substrate support in a manner that relieves the internal stresses of the elastomer band, leading to an elastomer band with a longer operational lifetime. The installation fixture is secured to a substrate support with mechanical fasteners. An elastomer band is placed around an outer circumference of the installation fixture and rotated back and forth to relieve internal stresses of the elastomer band. The fixture is inverted and the elastomer band is slid vertically off the fixture and into the mounting groove. An embedding tool can be used to completely insert the elastomer band into the mounting groove.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 18, 2014
    Inventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
  • Patent number: 8844106
    Abstract: A kit comprising an installation fixture, a plurality of mechanical fasteners and an embedding tool is provided which allows for an elastomer band to be disposed in a mounting groove around a semiconductor substrate support in a manner that relieves the internal stresses of the elastomer band, leading to an elastomer band with a longer operational lifetime. The installation fixture is secured to a substrate support with mechanical fasteners. An elastomer band is placed around an outer circumference of the installation fixture and rotated back and forth to relieve internal stresses of the elastomer band. The fixture is inverted and the elastomer band is slid vertically off the fixture and into the mounting groove. An embedding tool can be used to completely insert the elastomer band into the mounting groove.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: September 30, 2014
    Assignee: Lam Research Corporation
    Inventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
  • Publication number: 20140083461
    Abstract: A method of removing an epoxy band from an electrostatic chuck includes securing the electrostatic chuck in a servicing fixture, applying a thermal source to the epoxy band to breakdown a plurality of adhesive bonds securing the epoxy band to the electrostatic chuck, forming a hole in the epoxy band and pulling the epoxy band from the electrostatic chuck. A system for removing an epoxy band from an electrostatic chuck is also described.
    Type: Application
    Filed: September 21, 2012
    Publication date: March 27, 2014
    Applicant: LAM RESEARCH CORPORATION
    Inventors: Hong Shih, Tuochuan Huang, Yan Fang, Cliff LaCroix, Neal Newton, Rish Chhatre
  • Publication number: 20130117986
    Abstract: A kit comprising an installation fixture, a plurality of mechanical fasteners and an embedding tool is provided which allows for an elastomer band to be disposed in a mounting groove around a semiconductor substrate support in a manner that relieves the internal stresses of the elastomer band, leading to an elastomer band with a longer operational lifetime. The installation fixture is secured to a substrate support with mechanical fasteners. An elastomer band is placed around an outer circumference of the installation fixture and rotated back and forth to relieve internal stresses of the elastomer band. The fixture is inverted and the elastomer band is slid vertically off the fixture and into the mounting groove. An embedding tool can be used to completely insert the elastomer band into the mounting groove.
    Type: Application
    Filed: November 10, 2011
    Publication date: May 16, 2013
    Applicant: Lam Research Corporation
    Inventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
  • Publication number: 20130098554
    Abstract: An improved gas injection assembly for mounting in a central bore of a dielectric window of an inductively coupled plasma chamber includes a window having a central bore and cylindrical recess configured to receive an annular insert having a bayonet opening. The gas injector assembly includes a gas injector, an RF shield surrounding the gas injector, and a faceplate surrounding the RF shield, the faceplate including projections at the bottom thereof for engaging the bayonet opening in the annular insert. The window and gas injection assembly are designed to avoid chipping of the window which is typically made of quartz and in prior mounting arrangements the window has a bayonet opening machined therein. Due to the brittle nature of the quartz material, the machined bayonet opening was subject to chipping when the gas injector assembly was inserted into the bayonet opening.
    Type: Application
    Filed: October 25, 2011
    Publication date: April 25, 2013
    Applicant: Lam Research Corporation
    Inventors: Rish Chhatre, David Schaefer