Patents by Inventor Sirish Reddy

Sirish Reddy 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: 9520295
    Abstract: Systems and methods for depositing a metal-doped amorphous carbon hardmask film or a metal-doped amorphous silicon hardmask film includes arranging a substrate in a processing chamber; supplying a carrier gas to the processing chamber; supplying a hydrocarbon precursor gas or a silicon precursor gas to the processing chamber, respectively; supplying a metal-based precursor gas to the processing chamber; one of creating or supplying plasma in the processing chamber; and depositing a metal-doped amorphous carbon hardmask film or a metal-doped amorphous silicon hardmask film on the substrate, respectively.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: December 13, 2016
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Fayaz Shaikh, Sirish Reddy, Alice Hollister
  • Publication number: 20160284541
    Abstract: A system and method for depositing a metal dielectric film includes arranging a substrate in a plasma enhanced chemical vapor deposition (PECVD) processing chamber; supplying a carrier gas to the PECVD processing chamber; supplying a dielectric precursor gas to the PECVD processing chamber; supplying a metal precursor gas to the PECVD processing chamber; creating plasma in the PECVD processing chamber; and depositing a metal dielectric film on the substrate at a process temperature that is less than 500° C.
    Type: Application
    Filed: March 24, 2015
    Publication date: September 29, 2016
    Inventors: Fayaz Shaikh, Sirish Reddy
  • Publication number: 20160225632
    Abstract: Systems and methods for depositing a metal-doped amorphous carbon hardmask film or a metal-doped amorphous silicon hardmask film includes arranging a substrate in a processing chamber; supplying a carrier gas to the processing chamber; supplying a hydrocarbon precursor gas or a silicon precursor gas to the processing chamber, respectively; supplying a metal-based precursor gas to the processing chamber; one of creating or supplying plasma in the processing chamber; and depositing a metal-doped amorphous carbon hardmask film or a metal-doped amorphous silicon hardmask film on the substrate, respectively.
    Type: Application
    Filed: February 3, 2015
    Publication date: August 4, 2016
    Inventors: Fayaz Shaikh, Sirish Reddy, Alice Hollister
  • Publication number: 20160225588
    Abstract: Systems and methods for depositing an amorphous carbon hardmask film include arranging a substrate in a processing chamber; supplying a carrier gas to the processing chamber; supplying a hydrocarbon precursor to the processing chamber; supplying fluorine precursor from a group consisting of WFa, NFb, SFc, and F2 to the processing chamber, wherein a, b and c are integers greater than zero; one of supplying plasma to the processing chamber or creating plasma in the processing chamber, wherein fluorine from the fluorine precursor combines with hydrogen from the hydrocarbon precursor in gas phase reactions; and depositing an amorphous carbon hardmask film on the substrate.
    Type: Application
    Filed: February 3, 2015
    Publication date: August 4, 2016
    Inventors: Fayaz Shaikh, Sirish Reddy
  • Publication number: 20160172165
    Abstract: A carrier ring for use in a chamber implemented for depositing films and chambers that use the carrier ring are provided. The carrier ring has an annular disk shape with an outer edge side and a wafer edge side. The carrier ring has a top carrier ring surface that extends between the outer edge side to the wafer edge side. The wafer edge side includes a lower carrier ring surface that is lower than the top carrier ring surface. The wafer edge side also includes a plurality of contact support structures. Each contact support structure is located at an edge of the lower carrier ring surface and has a height that is between the lower carrier ring surface and the top carrier ring surface, and the contact support structure has tapered edges and corners. A step is defined between the top carrier ring surface and the lower carrier ring surface, such that a top facing edge is disposed at a top of the step and a lower inner edge is disposed at the bottom of the step.
    Type: Application
    Filed: December 12, 2014
    Publication date: June 16, 2016
    Inventors: Eli Jeon, Nick Ray Linebarger, JR., Sirish Reddy, Alice Hollister, Rungthiwa Methaapanon
  • Patent number: 9362133
    Abstract: Methods and apparatuses for multiple patterning using image reversal are provided. The methods may include depositing gap-fill ashable hardmasks using a deposition-etch-ash method to fill gaps in a pattern of a semiconductor substrate and eliminating spacer etching steps using a single-etch planarization method. Such methods may be performed for double patterning, multiple patterning, and two dimensional patterning techniques in semiconductor fabrication.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: June 7, 2016
    Assignee: Lam Research Corporation
    Inventors: Nader Shamma, Bart van Schravendijk, Sirish Reddy, Chunhai Ji
  • Patent number: 9337068
    Abstract: A method of forming an oxygen-containing ceramic hard mask film on a semiconductor substrate involves receiving a semiconductor substrate in a plasma-enhanced chemical vapor deposition (PECVD) process chamber and depositing forming by PEVCD on the substrate an oxygen-containing ceramic hard mask film, the film being etch selective to low-k dielectric and copper, resistant to plasma dry-etch and removable by wet-etch. The method may further involve removing the oxygen-containing ceramic hard mask film from the substrate with a wet etch. Corresponding films and apparatus are also provided.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: May 10, 2016
    Assignee: Lam Research Corporation
    Inventors: George Andrew Antonelli, Alice Hollister, Sirish Reddy
  • Patent number: 9117668
    Abstract: Smooth silicon films having low compressive stress and smooth tensile silicon films are deposited by plasma enhanced chemical vapor deposition (PECVD) using a process gas comprising a silicon-containing precursor (e.g., silane), argon, and a second gas, such as helium, hydrogen, or a combination of helium and hydrogen. Doped smooth silicon films and smooth silicon germanium films can be obtained by adding a source of dopant or a germanium-containing precursor to the process gas. In some embodiments dual frequency plasma comprising high frequency (HF) and low frequency (LF) components is used during deposition, resulting in improved film roughness. The films are characterized by roughness (Ra) of less than about 7 ?, such as less than about 5 ? as measured by atomic force microscopy (AFM), and a compressive stress of less than about 500 MPa in absolute value. In some embodiments smooth tensile silicon films are obtained.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: August 25, 2015
    Assignee: Novellus Systems, Inc.
    Inventors: Alice Hollister, Sirish Reddy, Keith Fox, Mandyam Sriram, Joe Womack
  • Patent number: 9023731
    Abstract: Techniques, systems, and apparatuses for performing carbon gap-fill in semiconductor wafers are provided. The techniques may include performing deposition-etching operations in a cyclic fashion to fill a gap feature with carbon. A plurality of such deposition-etching cycles may be performed, resulting in a localized build-up of carbon film on the top surface of the semiconductor wafer near the gap feature. An ashing operation may then be performed to preferentially remove the built-up material from the top surface of the semiconductor wafer. Further groups of deposition-etching cycles may then be performed, interspersed with further ashing cycles.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: May 5, 2015
    Assignee: Novellus Systems, Inc.
    Inventors: Chunhai Ji, Sirish Reddy, Tuo Wang, Mandyam Sriram
  • Publication number: 20140175617
    Abstract: A method of forming an oxygen-containing ceramic hard mask film on a semiconductor substrate involves receiving a semiconductor substrate in a plasma-enhanced chemical vapor deposition (PECVD) process chamber and depositing forming by PEVCD on the substrate an oxygen-containing ceramic hard mask film, the film being etch selective to low-k dielectric and copper, resistant to plasma dry-etch and removable by wet-etch. The method may further involve removing the oxygen-containing ceramic hard mask film from the substrate with a wet etch. Corresponding films and apparatus are also provided.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 26, 2014
    Applicant: Lam Research Corporation
    Inventors: George Andrew Antonelli, Alice Hollister, Sirish Reddy
  • Publication number: 20140170853
    Abstract: Methods and apparatuses for multiple patterning using image reversal are provided. The methods may include depositing gap-fill ashable hardmasks using a deposition-etch-ash method to fill gaps in a pattern of a semiconductor substrate and eliminating spacer etching steps using a single-etch planarization method. Such methods may be performed for double patterning, multiple patterning, and two dimensional patterning techniques in semiconductor fabrication.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 19, 2014
    Inventors: Nader Shamma, Bart van Schravendijk, Sirish Reddy, Chunhai Ji
  • Publication number: 20140096834
    Abstract: A method for supplying vapor to a chamber includes providing a first diverter valve that, when open, diverts vapor away from the chamber, and a second diverter valve that, when open, supplies the vapor to the chamber; supplying a carrier gas to the chamber; after supplying the carrier gas, creating plasma in the chamber while a substrate is in the chamber; opening the first diverter valve and closing the second diverter valve; supplying the vapor by vaporizing at least one liquid precursor in a carrier gas; after a first predetermined period sufficient for the vapor to reach steady-state flow, closing the first diverter valve and opening the second diverter valve to supply the vapor to the chamber; and after a second predetermined period following the first predetermined period, opening the first diverter valve and closing the second diverter valve to stop supplying the vapor to the chamber.
    Type: Application
    Filed: December 4, 2013
    Publication date: April 10, 2014
    Applicant: Lam Research Corporation
    Inventors: Damien Slevin, Brad Laird, Curtis Bailey, Ming Li, Sirish Reddy, James Sims, Mohamed Sabri, Saangrut Sangplug
  • Publication number: 20140094035
    Abstract: Techniques, systems, and apparatuses for performing carbon gap-fill in semiconductor wafers are provided. The techniques may include performing deposition-etching operations in a cyclic fashion to fill a gap feature with carbon. A plurality of such deposition-etching cycles may be performed, resulting in a localized build-up of carbon film on the top surface of the semiconductor wafer near the gap feature. An ashing operation may then be performed to preferentially remove the built-up material from the top surface of the semiconductor wafer. Further groups of deposition-etching cycles may then be performed, interspersed with further ashing cycles.
    Type: Application
    Filed: May 17, 2013
    Publication date: April 3, 2014
    Applicant: Novellus Systems, Inc.
    Inventors: Chunhai Ji, Sirish Reddy, Tuo Wang, Mandyam Sriram
  • Patent number: 8628618
    Abstract: A vapor delivery system for supplying vapor to a chamber in a plasma-enhanced chemical vapor deposition (PECVD) system includes a vapor supply that supplies vapor by vaporizing at least one liquid precursor in a carrier gas. A first path includes a first filter that filters the vapor flowing from the vapor supply to the chamber. At least one second path is parallel to the first path and includes a second filter that filters vapor flowing from the vapor supply to the chamber. A plurality of valves are configured to switch delivery of the vapor to the chamber between the first path and the second path.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: January 14, 2014
    Assignee: Novellus Systems Inc.
    Inventors: Damien Slevin, Brad Laird, Curtis Bailey, Ming Li, Sirish Reddy, James Sims, Mohamed Sabri, Saangrut Sangplug
  • Publication number: 20130316518
    Abstract: Smooth silicon films having low compressive stress and smooth tensile silicon films are deposited by plasma enhanced chemical vapor deposition (PECVD) using a process gas comprising a silicon-containing precursor (e.g., silane), argon, and a second gas, such as helium, hydrogen, or a combination of helium and hydrogen. Doped smooth silicon films and smooth silicon germanium films can be obtained by adding a source of dopant or a germanium-containing precursor to the process gas. In some embodiments dual frequency plasma comprising high frequency (HF) and low frequency (LF) components is used during deposition, resulting in improved film roughness. The films are characterized by roughness (Ra) of less than about 7 ?, such as less than about 5 ? as measured by atomic force microscopy (AFM), and a compressive stress of less than about 500 MPa in absolute value. In some embodiments smooth tensile silicon films are obtained.
    Type: Application
    Filed: May 23, 2012
    Publication date: November 28, 2013
    Inventors: Alice HOLLISTER, Sirish REDDY, Keith FOX, Mandyam SRIRAM, Joe WOMACK
  • Patent number: 8362571
    Abstract: Transistor architectures and fabrication processes generate channel strain without adversely impacting the efficiency of the transistor fabrication process while preserving the material quality and enhancing the performance of the resulting transistor. Transistor strain is generated is PMOS devices using a highly compressive post-salicide amorphous carbon capping layer applied as a blanket over on at least the source and drain regions. The stress from this capping layer is uniaxially transferred to the PMOS channel through the source-drain regions to create compressive strain in PMOS channel.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: January 29, 2013
    Assignee: Novellus Systems, Inc.
    Inventors: Qingguo Wu, James S. Sims, Mandyam Sriram, Seshasayee Varadarajan, Haiying Fu, Pramod Subramonium, Jon Henri, Sirish Reddy
  • Publication number: 20120258261
    Abstract: A method for depositing a film includes arranging a substrate in a plasma enhanced chemical vapor deposition chamber. A first ashable hardmask (AHM) layer that is carbon-based is deposited on the substrate. During the depositing of the first AHM layer, doping is performed with at least one dopant selected from a group consisting of silicon, silane, boron, nitrogen, germanium, carbon, ammonia, and carbon dioxide. An atomic percentage of the at least one dopant is greater than or equal to 5% of the first AHM layer.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 11, 2012
    Applicant: Novellus Systems, Inc.
    Inventors: Sirish Reddy, Alice Hollister, Pramod Subramonium, Jon Henri, Chunhai Ji, Zhi Yuan Fang
  • Publication number: 20110111136
    Abstract: A vapor delivery system for supplying vapor to a chamber in a plasma-enhanced chemical vapor deposition (PECVD) system includes a vapor supply that supplies vapor by vaporizing at least one liquid precursor in a carrier gas. A first path includes a first filter that filters the vapor flowing from the vapor supply to the chamber. At least one second path is parallel to the first path and includes a second filter that filters vapor flowing from the vapor supply to the chamber. A plurality of valves are configured to switch delivery of the vapor to the chamber between the first path and the second path.
    Type: Application
    Filed: September 28, 2010
    Publication date: May 12, 2011
    Applicant: Novellus Systems Inc.
    Inventors: Damien Slevin, Brad Laird, Curtis Bailey, Ming Li, Sirish Reddy, James Sims, Mohamed Sabri, Saangrut Sangplug
  • Patent number: 7906817
    Abstract: Transistor architectures and fabrication processes generate channel strain without adversely impacting the efficiency of the transistor fabrication process while preserving the material quality and enhancing the performance of the resulting transistor. Transistor strain is generated is PMOS devices using a highly compressive post-salicide amorphous carbon capping layer applied as a blanket over on at least the source and drain regions. The stress from this capping layer is uniaxially transferred to the PMOS channel through the source-drain regions to create compressive strain in PMOS channel.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: March 15, 2011
    Assignee: Novellus Systems, Inc.
    Inventors: Qingguo Wu, James S. Sims, Mandyam Sriram, Seshasayee Varadarajan, Haiying Fu, Pramod Subramonium, Jon Henri, Sirish Reddy
  • Publication number: 20080274335
    Abstract: The present invention provides a method for modifying a surface of a polymer derived from a mixture comprising a thiol monomer and an olefinic monomer. The method comprises exposing at least a portion of the polymer surface to electromagnetic radiation of sufficient energy to modify the polymer surface. The present invention also provides a polymer derived from polymerizing a mixture of monomers comprising a thiol monomer, an olefinic monomer, and an iniferter.
    Type: Application
    Filed: December 16, 2005
    Publication date: November 6, 2008
    Applicant: REGENTS OF THE UNIVERSITY OF COLORADO
    Inventors: Christopher N. Bowman, Sirish Reddy, Neil Cramer, Robert P. Sebra, Hui Lu