Patents by Inventor Raghav SREENIVASAN

Raghav SREENIVASAN 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: 11936754
    Abstract: An example method of file transfer between a client and a server includes: initiating, by the client, a front-end control connection between the client and a horizontally scaled proxy service; creating, by a first proxy instance of a plurality of proxy instances of the horizontally scaled proxy service, a back-end control connection between the first proxy instance and the server; returning, to the client from the first proxy instance, a unique client parameter associated with the front-end connection as a destination port for a front-end data connection; initiating, by the client, the front-end data connection between the client and the horizontally scaled proxy service, the front-end data connection using the destination port as returned by the first proxy instance; and creating, by the first proxy instance, a back-end data connection between the first proxy instance and the server.
    Type: Grant
    Filed: March 16, 2023
    Date of Patent: March 19, 2024
    Assignee: VMware LLC
    Inventors: Rajagopal Sreenivasan, Raghav Kempanna, Sudarshana Kandachar Sridhara Rao, Srinivasa Srikanth Podila, Kumara Parameshwaran
  • Patent number: 11908678
    Abstract: Processing methods may be performed to form a filled contact hole in a mirror layer of a semiconductor substrate. The method may include forming a contact hole through a mirror layer of the semiconductor substrate by an etch process. The method may include filling the contact hole with a fill material. A portion of the fill material may overlie the mirror layer. The method may also include removing a portion of the fill material external to the contact hole by chemical mechanical polishing landing on the mirror layer.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: February 20, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan, Joseph Salfelder
  • Patent number: 11880052
    Abstract: Processing methods may be performed to form a grounded mirror structure on a semiconductor substrate. The methods may include revealing a metal layer. The metal layer may underlie a spacer layer. The metal layer may be revealed by a dry etch process. The method may include forming a mirror layer overlying the spacer layer and the metal layer. The mirror layer may contact the metal layer. The method may also include forming an oxide inclusion overlying a portion of the mirror layer. The portion of the mirror layer may be external to the spacer layer.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: January 23, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Patent number: 11881539
    Abstract: Processing methods may be performed to form a pixel material in a semiconductor substrate. The methods may include forming a lithographic mask overlying the semiconductor substrate. The lithographic mask may include a window. The method may include forming a via in the semiconductor substrate by a dry etch process through the window. The method may also include forming the pixel material by depositing a fill material in the via.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: January 23, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Patent number: 11819847
    Abstract: Embodiments of the present disclosure provide nanopore devices, such as nanopore sensors and/or other nanofluidic devices. In one or more embodiments, a nanopore device contains a substrate, an optional lower protective oxide layer disposed on the substrate, a membrane disposed on the lower protective oxide layer, and an optional upper protective oxide layer disposed on the membrane. The membrane has a pore and contains silicon nitride. The silicon nitride has a nitrogen to silicon ratio of about 0.98 to about 1.02 and the membrane has an intrinsic stress value of about ?1,000 MPa to about 1,000 MPa. The nanopore device also contains a channel extending through at least the substrate, the lower protective oxide layer, the membrane, the upper protective oxide layer, and the upper protective silicon nitride layer.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: November 21, 2023
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Ryan Scott Smith, Roger Quon, David Collins, George Odlum, Raghav Sreenivasan, Joseph R. Johnson
  • Publication number: 20230369532
    Abstract: A microLED-quality layer of gallium nitride (GaN) may be formed above a silicon substrate for microLED devices to be formed. Typically, mismatches between the crystal lattice of the GaN and the silicon substrate cause internal stresses that bow the wafer. To relieve these stresses, a pattern of trenches may be etched into the GaN layer between the die or device footprints. These trenches may be etched through the GaN layer, down to the depth of the silicon substrate, or even down into the silicon substrate. Instead of one singular, large wafer with internal stresses, the wafer may thus be divided into multiple small sections with minimal internal stresses. A dielectric gap fill may be applied to fill the trenches, and the resulting wafer may be planarized to expose the surface of the GaN after the gap fill.
    Type: Application
    Filed: May 16, 2022
    Publication date: November 16, 2023
    Applicant: Applied Materials, Inc.
    Inventors: Tyler Sherwood, Raghav Sreenivasan
  • Patent number: 11742363
    Abstract: The present disclosure pertains to a barrier stack for thin film and/or printed electronics on substrates having a diffusible element and/or species, methods of manufacturing the same, and methods of inhibiting or preventing diffusion of a diffusible element or species in a substrate using the same. The barrier stack includes a first barrier layer on the substrate, an insulator layer on the first barrier layer, a second barrier layer on the insulator layer in a first region of the substrate, and a third barrier layer on the insulator layer in a second region of the substrate and on the second barrier layer in the first region. Each of the second and third barrier layers has a thickness less than that of the first barrier layer.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: August 29, 2023
    Assignee: Ensurge Micropower ASA
    Inventors: Raghav Sreenivasan, Aditi Chandra, Yoocharn Jeon
  • Publication number: 20230066610
    Abstract: Methods of semiconductor processing may include contacting a substrate with a first slurry and a first platen. The substrate may include silicon oxide defining one or more features, a liner extending across the silicon oxide and within the one or more features, and a copper-containing layer deposited on the liner and extending within the one or more features. The first slurry and the first platen may remove a first portion of the copper-containing layer. The methods may include contacting the substrate with a second slurry and a second platen, which may remove at least a portion of the liner. The methods may include contacting the substrate with a third slurry and a third platen, which may remove a second portion of the copper-containing layer. The methods may include contacting the substrate with a fourth slurry and a fourth platen, which may remove at least a portion of the silicon oxide.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 2, 2023
    Applicant: Applied Materials, Inc.
    Inventors: Tyler Sherwood, Joseph F. Salfelder, Ki Cheol Ahn, Kai Ma, Raghav Sreenivasan, Jason Appell
  • Patent number: 11586067
    Abstract: Processing methods may be performed to form a pixel material in a semiconductor substrate. The methods may include forming a lithographic mask overlying the semiconductor substrate. The lithographic mask may include a window. The method may include forming a via in the semiconductor substrate by a dry etch process through the window. The method may also include forming the pixel material by depositing a fill material in the via.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: February 21, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Patent number: 11573452
    Abstract: Processing methods may be performed to forming a pixel material in a semiconductor structure. The methods may include forming a sacrificial hardmask overlying an uppermost layer of an optical stack of the semiconductor structure, the uppermost layer having a thickness. The methods may include forming a via through the sacrificial hardmask in the optical stack by a first etch process unselective to a metal layer of the semiconductor structure. The methods may include filling the via with a fill material, wherein a portion of the fill material extends over the sacrificial hardmask and contacts the metal layer. The methods may include removing a portion of the fill material external to the via by a removal process selective to the fill material. The methods may also include removing the sacrificial hardmask by a second etch process selective to the sacrificial hardmask while maintaining the thickness of the uppermost layer.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: February 7, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Patent number: 11536708
    Abstract: Embodiments of the present disclosure provide dual pore sensors and methods for producing these dual pore sensors. The method includes forming a film stack, where the film stack contains two silicon layers and two membrane layers, and then etching the film stack to produce a channel extending therethrough and having two reservoirs and two nanopores. The method also includes depositing a oxide layer on inner surfaces of the reservoirs and nanopores, depositing a dielectric layer on the oxide layer, and forming a metal contact extending through a portion of the stack. The method further includes etching the dielectric layers to form wells, etching the first silicon layer to reveal the protective oxide layer deposited on the inner surfaces of a reservoir, and etching the protective oxide layer deposited on the inner surfaces of the reservoirs and the nanopores.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: December 27, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Mark J. Saly, Keenan Navarre Woods, Joseph R. Johnson, Bhaskar Jyoti Bhuyan, William J. Durand, Michael Chudzik, Raghav Sreenivasan, Roger Quon
  • Publication number: 20220242725
    Abstract: Embodiments of the present disclosure provide methods of forming solid state dual pore sensors which may be used for biopolymer sequencing and dual pore sensors formed therefrom. In one embodiment, a method of forming a dual pore sensor includes providing a pattern in a surface of a substrate. Generally, the pattern features two fluid reservoirs separated by a divider wall. The method further includes depositing a layer of sacrificial material into the two fluid reservoirs, depositing a membrane layer, patterning two nanopores through the membrane layer, removing the sacrificial material from the two fluid reservoirs, and patterning one or more fluid ports and a common chamber.
    Type: Application
    Filed: April 15, 2020
    Publication date: August 4, 2022
    Inventors: Joseph R. JOHNSON, Roger QUON, Archana KUMAR, Ryan Scott SMITH, Jeremiah HEBDING, Raghav SREENIVASAN
  • Publication number: 20220236250
    Abstract: Embodiments of the present disclosure provide methods of forming solid state dual pore sensors which may be used for biopolymer sequencing and dual pore sensors formed therefrom. In one embodiment, a dual pore sensor features a substrate having a patterned surface comprising two recessed regions spaced apart by a divider wall and a membrane layer disposed on the patterned surface. The membrane layer, the divider wall, and one or more surfaces of each of the two recessed regions collectively define a first fluid reservoir and a second fluid reservoir. A first nanopore is disposed through a portion of the membrane layer disposed over the first fluid reservoir and a second nanopore is disposed through a portion of the membrane layer disposed over the second fluid reservoir. Herein, opposing surfaces of the divider wall are sloped to each form an angle of less than 90° with a respective reservoir facing surface of the membrane layer.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 28, 2022
    Inventors: Joseph R. JOHNSON, Roger QUON, Archana KUMAR, Ryan Scott SMITH, Jeremiah HEBDING, Raghav SREENIVASAN
  • Publication number: 20220223402
    Abstract: Processing methods may be performed to form a filled contact hole in a mirror layer of a semiconductor substrate. The method may include forming a contact hole through a mirror layer of the semiconductor substrate by an etch process. The method may include filling the contact hole with a fill material. A portion of the fill material may overlie the mirror layer. The method may also include removing a portion of the fill material external to the contact hole by chemical mechanical polishing landing on the mirror layer.
    Type: Application
    Filed: January 14, 2021
    Publication date: July 14, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan, Joseph Salfelder
  • Publication number: 20220165912
    Abstract: Processing methods may be performed to form a pixel material in a semiconductor substrate. The methods may include forming a lithographic mask overlying the semiconductor substrate. The lithographic mask may include a window. The method may include forming a via in the semiconductor substrate by a dry etch process through the window. The method may also include forming the pixel material by depositing a fill material in the via.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Publication number: 20220163846
    Abstract: Processing methods may be performed to forming a pixel material in a semiconductor structure. The methods may include forming a sacrificial hardmask overlying an uppermost layer of an optical stack of the semiconductor structure, the uppermost layer having a thickness. The methods may include forming a via through the sacrificial hardmask in the optical stack by a first etch process unselective to a metal layer of the semiconductor structure. The methods may include filling the via with a fill material, wherein a portion of the fill material extends over the sacrificial hardmask and contacts the metal layer. The methods may include removing a portion of the fill material external to the via by a removal process selective to the fill material. The methods may also include removing the sacrificial hardmask by a second etch process selective to the sacrificial hardmask while maintaining the thickness of the uppermost layer.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Publication number: 20220163845
    Abstract: Processing methods may be performed to form a pixel material in a semiconductor substrate. The methods may include forming a lithographic mask overlying the semiconductor substrate. The lithographic mask may include a window. The method may include forming a via in the semiconductor substrate by a dry etch process through the window. The method may also include forming the pixel material by depositing a fill material in the via.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Publication number: 20220163707
    Abstract: Processing methods may be performed to form a grounded mirror structure on a semiconductor substrate. The methods may include revealing a metal layer. The metal layer may underlie a spacer layer. The metal layer may be revealed by a dry etch process. The method may include forming a mirror layer overlying the spacer layer and the metal layer. The mirror layer may contact the metal layer. The method may also include forming an oxide inclusion overlying a portion of the mirror layer. The portion of the mirror layer may be external to the spacer layer.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lan Yu, Benjamin D. Briggs, Tyler Sherwood, Raghav Sreenivasan
  • Publication number: 20220016628
    Abstract: Embodiments of the present disclosure provide nanopore devices, such as nanopore sensors and/or other nanofluidic devices. In one or more embodiments, a nanopore device contains a substrate, an optional lower protective oxide layer disposed on the substrate, a membrane disposed on the lower protective oxide layer, and an optional upper protective oxide layer disposed on the membrane. The membrane has a pore and contains silicon nitride. The silicon nitride has a nitrogen to silicon ratio of about 0.98 to about 1.02 and the membrane has an intrinsic stress value of about ?1,000 MPa to about 1,000 MPa. The nanopore device also contains a channel extending through at least the substrate, the lower protective oxide layer, the membrane, the upper protective oxide layer, and the upper protective silicon nitride layer.
    Type: Application
    Filed: July 20, 2020
    Publication date: January 20, 2022
    Inventors: Ryan Scott SMITH, Roger QUON, David COLLINS, George ODLUM, Raghav SREENIVASAN, Joseph R. JOHNSON
  • Publication number: 20210215664
    Abstract: Embodiments of the present disclosure provide dual pore sensors and methods for producing these dual pore sensors. The method includes forming a film stack, where the film stack contains two silicon layers and two membrane layers, and then etching the film stack to produce a channel extending therethrough and having two reservoirs and two nanopores. The method also includes depositing a oxide layer on inner surfaces of the reservoirs and nanopores, depositing a dielectric layer on the oxide layer, and forming a metal contact extending through a portion of the stack. The method further includes etching the dielectric layers to form wells, etching the first silicon layer to reveal the protective oxide layer deposited on the inner surfaces of a reservoir, and etching the protective oxide layer deposited on the inner surfaces of the reservoirs and the nanopores.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 15, 2021
    Inventors: Mark J. SALY, Keenan Navarre WOODS, Joseph R. JOHNSON, Bhaskar Jyoti BHUYAN, William J. DURAND, Michael CHUDZIK, Raghav SREENIVASAN, Roger QUON