Patents by Inventor Ramesh Gopalan

Ramesh Gopalan 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: 20230238267
    Abstract: Methods and apparatus reduce chucking abnormalities for electrostatic chucks by ensuring proper planarizing of ceramic surfaces of the electrostatic chuck. In some embodiments, a method for planarizing an upper ceramic surface of an electrostatic chuck assembly may comprise placing the electrostatic chuck assembly in a first planarizing apparatus, altering an upper ceramic surface of the electrostatic chuck assembly, and halting the altering of the upper ceramic surface of the electrostatic chuck assembly when an Sa parameter is less than approximately 0.1 microns, an Sdr parameter is less than approximately 2.5 percent, an Sz parameter is less than approximately 10 microns for any given area of approximately 10 mm2 of the upper ceramic surface, or a pit-porosity depth parameter of greater than 1 micron is less than approximately 0.1 percent of area of the upper ceramic surface.
    Type: Application
    Filed: January 26, 2022
    Publication date: July 27, 2023
    Inventors: Ramesh GOPALAN, Robert Toshiharu HIRAHARA, Stanley WU, Michael Prestoza DECENA, Wendell BOYD, Siamak SALIMIAN, Thomas BREZOCZKY
  • Patent number: 11521839
    Abstract: Embodiments of the present invention provide apparatus, systems and methods for measuring dissociation of a process gas generated by a RPS. In one embodiment, a method of measuring dissociation of a process gas includes receiving a process gas from a RPS, the process gas including a polyatomic molecule that dissociates into at least one free radical. The method further includes irradiating the process gas with IR radiation at one or more wavelengths, detecting the IR radiation that passes through the process gas, and determining a degree of dissociation of the polyatomic molecule in the process gas based, at least in part, on the detected IR radiation. In one embodiment, the method further comprises modifying one or more settings of the RPS, based, at least in part, on the determined degree of dissociation.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: December 6, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Ramesh Gopalan, Siamak Salimian
  • Publication number: 20220285185
    Abstract: Embodiments disclosed herein include an apparatus for measuring chucking force and methods of using such apparatuses. In an embodiment, the apparatus for measuring a chucking force comprises a substrate having a chucking surface, where the chucking surface is the surface that is supported by a chuck. In an embodiment, the apparatus further comprises a plurality of sensors over the chucking surface, where the plurality of sensors are thin film sensors with a thickness that is less than a thickness of the substrate. In an embodiment, the apparatus further comprises a wireless communication module electrically coupled to each of the plurality of sensors.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 8, 2022
    Inventor: Ramesh Gopalan
  • Patent number: 11373890
    Abstract: Embodiments disclosed herein include an apparatus for measuring chucking force and methods of using such apparatuses. In an embodiment, the apparatus for measuring a chucking force comprises a substrate having a chucking surface, where the chucking surface is the surface that is supported by a chuck. In an embodiment, the apparatus further comprises a plurality of sensors over the chucking surface, where the plurality of sensors are thin film sensors with a thickness that is less than a thickness of the substrate. In an embodiment, the apparatus further comprises a wireless communication module electrically coupled to each of the plurality of sensors.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: June 28, 2022
    Assignee: Applied Materials, Inc.
    Inventor: Ramesh Gopalan
  • Patent number: 11355325
    Abstract: Methods and apparatus for plasma processing are provided herein. For example, apparatus can include a system for plasma processing including a remote plasma source including a supply terminal configured to connect to a power source and an output configured to deliver RF power to a plasma block of the remote plasma source for creating a plasma and a controller configured to control operation of the remote plasma source based on a measured input power at the supply terminal.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: June 7, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Ramesh Gopalan, Hemant Mungekar, Guomin Mao, Rongping Wang, Teryl Pratt
  • Publication number: 20210375601
    Abstract: Methods and apparatus for plasma processing are provided herein. For example, apparatus can include a system for plasma processing including a remote plasma source including a supply terminal configured to connect to a power source and an output configured to deliver RF power to a plasma block of the remote plasma source for creating a plasma and a controller configured to control operation of the remote plasma source based on a measured input power at the supply terminal.
    Type: Application
    Filed: December 17, 2020
    Publication date: December 2, 2021
    Inventors: Ramesh GOPALAN, Hemant MUNGEKAR, Guomin MAO, Rongping WANG, Teryl PRATT
  • Publication number: 20210375701
    Abstract: Methods and apparatus for processing a substrate are provided herein. For example, apparatus can include a system for processing a substrate, comprising: a remote plasma source including a supply terminal configured to connect to a power source and an output configured to deliver RF power to a plasma block of the remote plasma source for creating a plasma; and a controller connected to the supply terminal of the remote plasma source and configured to determine, based on a predictive model of the remote plasma source, whether a power at the supply terminal is equal to a predetermined threshold during processing of a substrate, wherein the predictive model includes a correlation of remote plasma performance with delivered RF power at the output, and to control the processing of the substrate based on a determination of the predetermined threshold being met to control processing of the substrate.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 2, 2021
    Inventors: Ramesh GOPALAN, Hemant MUNGEKAR, Guomin MAO, Rongping WANG, Teryl PRATT
  • Patent number: 11114326
    Abstract: Methods for chucking and de-chucking a substrate from an electrostatic chucking (ESC) substrate support to reduce scratches of the non-active surface of a substrate include simultaneously increasing a voltage applied to a chucking electrode embedded in the ESC substrate support and a backside gas pressure in a backside volume disposed between the substrate and the substrate support to chuck the substrate and reversing the process to de-chuck the substrate.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: September 7, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Wendell Glenn Boyd, Jr., Jim Zhongyi He, Ramesh Gopalan, Robert T. Hirahara, Govinda Raj
  • Patent number: 11047035
    Abstract: Disclosed herein is a poly-crystalline protective coating on a surface of a chamber component. The poly-crystalline protective coating may be deposited by thermal spraying and may comprise cubic yttria and monoclinic yttria. At least one of: (1) the ratio of the cubic yttria to monoclinic yttria, (2) the crystallite size of at least one of the cubic yttria or the monoclinic yttria, (3) the atomic ratio of oxygen (O) to yttria (Y), and/or (4) the dielectric properties of the poly-crystalline protective coating may be controlled to obtain consistent chamber performance when switching coated chamber components within a chamber of interest.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: June 29, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Ramesh Gopalan, Yixing Lin, Tasnuva Tabassum, Siamak Salimian, Yikai Chen, Kevin Papke
  • Publication number: 20210159060
    Abstract: Embodiments of the present invention provide apparatus, systems and methods for measuring dissociation of a process gas generated by a RPS. In one embodiment, a method of measuring dissociation of a process gas includes receiving a process gas from a RPS, the process gas including a polyatomic molecule that dissociates into at least one free radical. The method further includes irradiating the process gas with IR radiation at one or more wavelengths, detecting the IR radiation that passes through the process gas, and determining a degree of dissociation of the polyatomic molecule in the process gas based, at least in part, on the detected IR radiation. In one embodiment, the method further comprises modifying one or more settings of the RPS, based, at least in part, on the determined degree of dissociation.
    Type: Application
    Filed: November 27, 2019
    Publication date: May 27, 2021
    Inventors: Ramesh GOPALAN, Siamak SALIMIAN
  • Publication number: 20210138279
    Abstract: This invention is to an anti-virus filter which may included in a facemask, personal protective equipment, respirator or ventilator to protect against airborne pathogens including the novel coronavirus. It is comprised of one or more anti-virus layers comprising a superabsorbent polymer which converts to a hydrogel upon addition of a water solution containing soap or detergent. The anti-virus layer is enclosed between an outer layer and an inner layer both of which are permeable to air but impermeable to water.
    Type: Application
    Filed: January 13, 2021
    Publication date: May 13, 2021
    Inventor: Ramesh Gopalan
  • Publication number: 20210045286
    Abstract: A self-regulating irrigation system to provide water and dissolved nutrients to plants through a tubing network is described including a sensor actuator circuit comprising an sensing circuit which senses aspects of soil condition through sensing a voltage between sensing terminals in the soil. Aspects of soil condition include moisture, mineral content and acidity or pH level. The sensed voltage is input to a comparator circuit whose output becomes input to an actuator circuit to activate a valve to supply a corresponding branch of the network with desired water or fluid nutrient.
    Type: Application
    Filed: August 16, 2020
    Publication date: February 18, 2021
    Inventor: Ramesh Gopalan
  • Publication number: 20200196937
    Abstract: A smart applicator for liquid cosmetic to hair, skin or nails is described, comprising a position indicator to measure the relative change of position of the applicator across a nearly flat surface; a sensor array to measure the prior color or cosmetic condition of hair strands or skin condition; an optional comb array to direct hair strands from their roots into a regular linear array; a microcontroller which outputs electrical signals to operate an array of micro-mechanical or inkjet nozzles aligned with the comb array so as to dispense dye or cosmetic droplets to the hair strands or skin surface according to input received from said sensors.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Inventor: Ramesh Gopalan
  • Publication number: 20200194290
    Abstract: Embodiments disclosed herein include an apparatus for measuring chucking force and methods of using such apparatuses. In an embodiment, the apparatus for measuring a chucking force comprises a substrate having a chucking surface, where the chucking surface is the surface that is supported by a chuck. In an embodiment, the apparatus further comprises a plurality of sensors over the chucking surface, where the plurality of sensors are thin film sensors with a thickness that is less than a thickness of the substrate. In an embodiment, the apparatus further comprises a wireless communication module electrically coupled to each of the plurality of sensors.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 18, 2020
    Inventors: Ramesh Gopalan, Robert Hirahara, Wendell Glenn Boyd, JR., Govinda Raj
  • Patent number: 10685819
    Abstract: An apparatus includes a reactive species source, a spectral measurement volume, a light source to emit a light beam into the spectral measurement volume, a spectrometer to receive the light beam from the spectral measurement volume. The apparatus includes an a controller configured to, when a reactive species is present in the spectral measurement volume, control the light source to emit the light beam into the spectral measurement volume and the spectrometer to determine an environment spectrum using the light beam, and when the reactive species is not present in the spectral measurement volume, control the light source to emit the light beam into the spectral measurement volume and the spectrometer to determine a baseline spectrum using the light beam, calculate a net spectrum based on a difference between the environment spectrum and the baseline spectrum, and estimate a concentration of the reactive species based on the net spectrum.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: June 16, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Ramesh Gopalan, Tom K. Cho, George Alajajian, Michael J. Mark
  • Patent number: 10656100
    Abstract: The implementations described herein generally relate to a sensing device for use in the semiconducting industry, which sense process parameters to control semiconductor processes. More specifically, the implementations relate to packaging for a surface acoustic wave (SAW) based devices or wireless or RF-responsive sensors for use in the harsh processing environments of a semiconductor processing chamber such that the neither the sensor and its components nor the chamber components interfere with or contaminate one another. The sensor packaging may include various packaging layers with or without protective coatings and a waveguide. The packaging may have a thickness chosen such that the thickness is less than the electromagnetic wavelength of a SAW sensor radio wave. The sensing devices may be disposed in cavities of the chamber, the processing volume, on chamber components, and/or on the substrate.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: May 19, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Ramesh Gopalan, Simon Yavelberg, Zubin Huang
  • Patent number: 10513008
    Abstract: Embodiments of the present disclosure generally relate to chemical mechanical polishing (CMP) of substrates. In one embodiment, a carrier head for a CMP apparatus is disclosed herein. The carrier head includes a body, a retaining ring, and a sensor assembly. The retaining ring is coupled to the body. The sensor assembly is positioned at least partially in the body. The sensor assembly includes a transmitter, an antenna, and a vibrational sensor. The transmitter has a first end and a second end. The antenna is coupled to the first end of the transmitter. The vibrational sensor is coupled to the second end. The vibrational sensor is configured to detect vibration during chemical mechanical processes with respect to radial, azimuthal, and angular axes of the carrier head.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: December 24, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Zubin Huang, Stephen A. Wells, Ramesh Gopalan, Gangadhar Sheelavant, Simon Yavelberg
  • Patent number: 10415251
    Abstract: A skylight to provide daylighting is described that includes a plurality of compound parabolic diffusers into one or more layers that may be dome or pyramid-shaped to enable more efficient collection of sunlight and its distribution through wider angles resulting in more comfortable illumination with less glare and heat gain—more light less heat—over wider areas of building interiors.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: September 17, 2019
    Assignee: Ramesh Gopalan
    Inventor: Ramesh Gopalan
  • Publication number: 20190264314
    Abstract: Disclosed herein is a poly-crystalline protective coating on a surface of a chamber component. The poly-crystalline protective coating may be deposited by thermal spraying and may comprise cubic yttria and monoclinic yttria. At least one of: (1) the ratio of the cubic yttria to monoclinic yttria, (2) the crystallite size of at least one of the cubic yttria or the monoclinic yttria, (3) the atomic ratio of oxygen (O) to yttria (Y), and/or (4) the dielectric properties of the poly-crystalline protective coating may be controlled to obtain consistent chamber performance when switching coated chamber components within a chamber of interest.
    Type: Application
    Filed: February 12, 2019
    Publication date: August 29, 2019
    Inventors: Ramesh Gopalan, Yixing Lin, Tasnuva Tabassum, Siamak Salimian, Yikai Chen, Kevin Papke
  • Publication number: 20190206712
    Abstract: Methods for chucking and de-chucking a substrate from an electrostatic chucking (ESC) substrate support to reduce scratches of the non-active surface of a substrate include simultaneously increasing a voltage applied to a chucking electrode embedded in the ESC substrate support and a backside gas pressure in a backside volume disposed between the substrate and the substrate support to chuck the substrate and reversing the process to de-chuck the substrate.
    Type: Application
    Filed: March 5, 2019
    Publication date: July 4, 2019
    Inventors: Wendell Glenn BOYD, JR., Jim Zhongyi HE, Ramesh GOPALAN, Robert T. HIRAHARA, Govinda RAJ