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: 20230238267Abstract: 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: ApplicationFiled: January 26, 2022Publication date: July 27, 2023Inventors: Ramesh GOPALAN, Robert Toshiharu HIRAHARA, Stanley WU, Michael Prestoza DECENA, Wendell BOYD, Siamak SALIMIAN, Thomas BREZOCZKY
-
Patent number: 11521839Abstract: 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: GrantFiled: November 27, 2019Date of Patent: December 6, 2022Assignee: Applied Materials, Inc.Inventors: Ramesh Gopalan, Siamak Salimian
-
Publication number: 20220285185Abstract: 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: ApplicationFiled: May 25, 2022Publication date: September 8, 2022Inventor: Ramesh Gopalan
-
Patent number: 11373890Abstract: 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: GrantFiled: December 4, 2019Date of Patent: June 28, 2022Assignee: Applied Materials, Inc.Inventor: Ramesh Gopalan
-
Patent number: 11355325Abstract: 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: GrantFiled: December 17, 2020Date of Patent: June 7, 2022Assignee: APPLIED MATERIALS, INC.Inventors: Ramesh Gopalan, Hemant Mungekar, Guomin Mao, Rongping Wang, Teryl Pratt
-
Publication number: 20210375601Abstract: 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: ApplicationFiled: December 17, 2020Publication date: December 2, 2021Inventors: Ramesh GOPALAN, Hemant MUNGEKAR, Guomin MAO, Rongping WANG, Teryl PRATT
-
Publication number: 20210375701Abstract: 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: ApplicationFiled: May 28, 2020Publication date: December 2, 2021Inventors: Ramesh GOPALAN, Hemant MUNGEKAR, Guomin MAO, Rongping WANG, Teryl PRATT
-
Patent number: 11114326Abstract: 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: GrantFiled: March 5, 2019Date of Patent: September 7, 2021Assignee: Applied Materials, Inc.Inventors: Wendell Glenn Boyd, Jr., Jim Zhongyi He, Ramesh Gopalan, Robert T. Hirahara, Govinda Raj
-
Patent number: 11047035Abstract: 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: GrantFiled: February 12, 2019Date of Patent: June 29, 2021Assignee: Applied Materials, Inc.Inventors: Ramesh Gopalan, Yixing Lin, Tasnuva Tabassum, Siamak Salimian, Yikai Chen, Kevin Papke
-
Publication number: 20210159060Abstract: 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: ApplicationFiled: November 27, 2019Publication date: May 27, 2021Inventors: Ramesh GOPALAN, Siamak SALIMIAN
-
Publication number: 20210138279Abstract: 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: ApplicationFiled: January 13, 2021Publication date: May 13, 2021Inventor: Ramesh Gopalan
-
Publication number: 20210045286Abstract: 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: ApplicationFiled: August 16, 2020Publication date: February 18, 2021Inventor: Ramesh Gopalan
-
Publication number: 20200196937Abstract: 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: ApplicationFiled: December 19, 2019Publication date: June 25, 2020Inventor: Ramesh Gopalan
-
Publication number: 20200194290Abstract: 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: ApplicationFiled: December 4, 2019Publication date: June 18, 2020Inventors: Ramesh Gopalan, Robert Hirahara, Wendell Glenn Boyd, JR., Govinda Raj
-
Patent number: 10685819Abstract: 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: GrantFiled: May 9, 2018Date of Patent: June 16, 2020Assignee: Applied Materials, Inc.Inventors: Ramesh Gopalan, Tom K. Cho, George Alajajian, Michael J. Mark
-
Patent number: 10656100Abstract: 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: GrantFiled: September 10, 2018Date of Patent: May 19, 2020Assignee: Applied Materials, Inc.Inventors: Ramesh Gopalan, Simon Yavelberg, Zubin Huang
-
Patent number: 10513008Abstract: 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: GrantFiled: September 8, 2017Date of Patent: December 24, 2019Assignee: APPLIED MATERIALS, INC.Inventors: Zubin Huang, Stephen A. Wells, Ramesh Gopalan, Gangadhar Sheelavant, Simon Yavelberg
-
Patent number: 10415251Abstract: 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: GrantFiled: May 3, 2019Date of Patent: September 17, 2019Assignee: Ramesh GopalanInventor: Ramesh Gopalan
-
Publication number: 20190264314Abstract: 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: ApplicationFiled: February 12, 2019Publication date: August 29, 2019Inventors: Ramesh Gopalan, Yixing Lin, Tasnuva Tabassum, Siamak Salimian, Yikai Chen, Kevin Papke
-
Publication number: 20190206712Abstract: 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: ApplicationFiled: March 5, 2019Publication date: July 4, 2019Inventors: Wendell Glenn BOYD, JR., Jim Zhongyi HE, Ramesh GOPALAN, Robert T. HIRAHARA, Govinda RAJ