Patents by Inventor Subbalakshmi Sreekala

Subbalakshmi Sreekala 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: 9490116
    Abstract: Embodiments of the disclosure provide methods and system for manufacturing film layers with minimum lithographic overlay errors on a semiconductor substrate. In one embodiment, a method for forming a film layer on a substrate includes supplying a deposition gas mixture including a silicon containing gas and a reacting gas onto a substrate disposed on a substrate support in a processing chamber, forming a plasma in the presence of the depositing gas mixture in the processing chamber, applying current to a plasma profile modulator disposed in the processing chamber while supplying the depositing gas mixture into the processing chamber, and rotating the substrate while depositing a film layer on the substrate.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: November 8, 2016
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Michael Tsiang, Praket P. Jha, Xinhai Han, Nagarajan Rajagopalan, Bok Hoen Kim, Tsutomu Kiyohara, Subbalakshmi Sreekala
  • Publication number: 20160260602
    Abstract: Embodiments generally relate to methods of controlling hydrogen content in a silicon oxide/amorphous silicon stack. By precleaning the substrate of residues, controlling the delivery of hydrogen during the stack deposition and preventing outgassing of hydrogen from deposited layers during subsequent layer deposition and processing, the effects of delamination can be avoided in the formation of devices, such as 3D NAND devices.
    Type: Application
    Filed: October 15, 2014
    Publication date: September 8, 2016
    Inventors: Subbalakshmi SREEKALA, Nagarajan RAJAGOPALAN, Bok Hoen KIM
  • Publication number: 20160203971
    Abstract: Embodiments of the disclosure provide methods and system for manufacturing film layers with minimum lithographic overlay errors on a semiconductor substrate. In one embodiment, a method for forming a film layer on a substrate includes supplying a deposition gas mixture including a silicon containing gas and a reacting gas onto a substrate disposed on a substrate support in a processing chamber, forming a plasma in the presence of the depositing gas mixture in the processing chamber, applying current to a plasma profile modulator disposed in the processing chamber while supplying the depositing gas mixture into the processing chamber, and rotating the substrate while depositing a film layer on the substrate.
    Type: Application
    Filed: October 8, 2015
    Publication date: July 14, 2016
    Inventors: Michael TSIANG, Praket P. JHA, Xinhai HAN, Nagarajan RAJAGOPALAN, Bok Hoen KIM, Tsutomu KIYOHARA, Subbalakshmi SREEKALA
  • Patent number: 9305838
    Abstract: An integrated circuit with BEOL interconnects may comprise: a substrate including a semiconductor device; a first layer of dielectric over the surface of the substrate, the first layer of dielectric including a filled via for making electrical contact to the semiconductor device; and a second layer of dielectric on the first layer of dielectric, the second layer of dielectric including a trench running perpendicular to the longitudinal axis of the filled via, the trench being filled with an interconnect line, the interconnect line comprising cross-linked carbon nanotubes and being physically and electrically connected to the filled via. Cross-linked CNTs are grown on catalyst particles on the bottom of the trench using growth conditions including a partial pressure of precursor gas greater than the transition partial pressure at which carbon nanotube growth transitions from a parallel carbon nanotube growth mode to a cross-linked carbon nanotube growth mode.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: April 5, 2016
    Assignee: Applied Materials, Inc.
    Inventors: Pravin K. Narwankar, Joe Griffith Cruz, Arvind Sundarrajan, Murali Narasimhan, Subbalakshmi Sreekala, Victor Pushparaj
  • Publication number: 20140272184
    Abstract: Methods for maintaining clean etch rate and reducing particulate contamination with PECVD of amorphous silicon films are provided. The method comprises cleaning a processing chamber with a plasma comprising a cleaning gas, exposing at least a portion of the interior surfaces and components of the processing chamber to an oxidation gas and a nitration gas in the presence of a plasma and depositing a bi-layer seasoning layer on the interior surfaces and components of the processing chamber.
    Type: Application
    Filed: February 12, 2014
    Publication date: September 18, 2014
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Subbalakshmi SREEKALA, Xinhai HAN, Nagarajan RAJAGOPALAN, Bok Hoen KIM, Yoichi SUZUKI, Tsutomu KIYOHARA
  • Publication number: 20130228933
    Abstract: An integrated circuit with BEOL interconnects may comprise: a substrate including a semiconductor device; a first layer of dielectric over the surface of the substrate, the first layer of dielectric including a filled via for making electrical contact to the semiconductor device; and a second layer of dielectric on the first layer of dielectric, the second layer of dielectric including a trench running perpendicular to the longitudinal axis of the filled via, the trench being filled with an interconnect line, the interconnect line comprising cross-linked carbon nanotubes and being physically and electrically connected to the filled via. Cross-linked CNTs are grown on catalyst particles on the bottom of the trench using growth conditions including a partial pressure of precursor gas greater than the transition partial pressure at which carbon nanotube growth transitions from a parallel carbon nanotube growth mode to a cross-linked carbon nanotube growth mode.
    Type: Application
    Filed: August 31, 2012
    Publication date: September 5, 2013
    Applicant: Applied Materials, Inc.
    Inventors: Pravin K. Narwankar, Joe Griffith Cruz, Arvind Sundarrajan, Murali Narasimhan, Subbalakshmi Sreekala, Victor Pushparaj