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).
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Publication number: 20210225616Abstract: 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: ApplicationFiled: January 7, 2019Publication date: July 22, 2021Inventors: Gordon Wen-Yin Peng, Ambarish (Rish) Chhatre, Dan Marohl, Tamarak Pandhumsoporn, Ignacio (Nacho) Chazaro
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Patent number: 9947512Abstract: 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: GrantFiled: October 25, 2011Date of Patent: April 17, 2018Assignee: LAM RESEARCH CORPORATIONInventors: Rish Chhatre, David Schaefer
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Patent number: 9583377Abstract: 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: GrantFiled: December 17, 2013Date of Patent: February 28, 2017Assignee: LAM RESEARCH CORPORATIONInventors: Rish Chhatre, David Schaefer
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Patent number: 9355884Abstract: 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: GrantFiled: August 27, 2014Date of Patent: May 31, 2016Assignee: LAM RESEARCH CORPORATIONInventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
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Patent number: 9105676Abstract: 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: GrantFiled: September 21, 2012Date of Patent: August 11, 2015Assignee: Lam Research CorporationInventors: Hong Shih, Tuochuan Huang, Yan Fang, Cliff LaCroix, Neal Newton, Rish Chhatre
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Publication number: 20150170942Abstract: 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: ApplicationFiled: December 17, 2013Publication date: June 18, 2015Applicant: Lam Research CorporationInventors: Rish Chhatre, David Schaefer
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Publication number: 20140366360Abstract: 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: ApplicationFiled: August 27, 2014Publication date: December 18, 2014Inventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
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Patent number: 8844106Abstract: 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: GrantFiled: November 10, 2011Date of Patent: September 30, 2014Assignee: Lam Research CorporationInventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
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Publication number: 20140083461Abstract: 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: ApplicationFiled: September 21, 2012Publication date: March 27, 2014Applicant: LAM RESEARCH CORPORATIONInventors: Hong Shih, Tuochuan Huang, Yan Fang, Cliff LaCroix, Neal Newton, Rish Chhatre
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Publication number: 20130117986Abstract: 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: ApplicationFiled: November 10, 2011Publication date: May 16, 2013Applicant: Lam Research CorporationInventors: Rish Chhatre, David Schaefer, Sung Lee, Dan Haber
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Publication number: 20130098554Abstract: 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: ApplicationFiled: October 25, 2011Publication date: April 25, 2013Applicant: Lam Research CorporationInventors: Rish Chhatre, David Schaefer