Patents by Inventor Annamalai Lakshmanan

Annamalai Lakshmanan 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: 20180277428
    Abstract: Described are methods for controlling the doping of metal nitride films such as TaN, TiN and MnN. The temperature during deposition of the metal nitride film may be controlled to provide a film density that permits a desired amount of doping. Dopants may include Ru, Cu, Co, Mn, Mo, Al, Mg, Cr, Nb, Ta, Ti and V. The metal nitride film may optionally be exposed to plasma treatment after doping.
    Type: Application
    Filed: May 25, 2018
    Publication date: September 27, 2018
    Inventors: Annamalai Lakshmanan, Ben-Li Sheu, Guodan Wei, Nicole Lundy, Paul F. Ma
  • Patent number: 10008412
    Abstract: Described are methods for controlling the doping of metal nitride films such as TaN, TiN and MnN. The temperature during deposition of the metal nitride film may be controlled to provide a film density that permits a desired amount of doping. Dopants may include Ru, Cu, Co, Mn, Mo, Al, Mg, Cr, Nb, Ta, Ti and V. The metal nitride film may optionally be exposed to plasma treatment after doping.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: June 26, 2018
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Annamalai Lakshmanan, Ben-Li Sheu, Guodan Wei, Nicole Lundy, Paul F. Ma
  • Publication number: 20170256448
    Abstract: Described are methods for controlling the doping of metal nitride films such as TaN, TiN and MnN. The temperature during deposition of the metal nitride film may be controlled to provide a film density that permits a desired amount of doping. Dopants may include Ru, Cu, Co, Mn, Mo, Al, Mg, Cr, Nb, Ta, Ti and V. The metal nitride film may optionally be exposed to plasma treatment after doping.
    Type: Application
    Filed: May 22, 2017
    Publication date: September 7, 2017
    Inventors: Annamalai Lakshmanan, Ben-Li Sheu, Guodan Wei, Nicole Lundy, Paul F. Ma
  • Patent number: 9659814
    Abstract: Described are methods for controlling the doping of metal nitride films such as TaN, TiN and MnN. The temperature during deposition of the metal nitride film may be controlled to provide a film density that permits a desired amount of doping. Dopants may include Ru, Cu, Co, Mn, Mo, Al, Mg, Cr, Nb, Ta, Ti and V. The metal nitride film may optionally be exposed to plasma treatment after doping.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: May 23, 2017
    Assignee: Applied Materials, Inc.
    Inventors: Annamalai Lakshmanan, Ben-Li Sheu, Guodan Wei, Nicole Lundy, Paul F. Ma
  • Patent number: 9613859
    Abstract: Methods for direct deposition of a metal silicide nanowire for back-end interconnection structures for semiconductor applications are provided. In one embodiment, the method includes positioning a substrate in a processing region of a process chamber, the substrate having a first surface comprising a non-dielectric material; and a dielectric layer formed on the first surface. An opening is formed in the dielectric layer, the opening exposing at least a portion of the first surface, the opening having sidewalls. A metal silicide seed is deposited in the opening using a PVD process, wherein the PVD process is performed with either no bias or a bias which creates deposition on the sidewall which is less than 1% of the deposition on the first surface. A metal silicide layer is then selectively deposited on the metal silicide seed using a metal-silicon organic precursor, creating the metal silicide nanowire.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: April 4, 2017
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Annamalai Lakshmanan, Bencherki Mebarki, Kaushal K. Singh, Paul F. Ma, Mehul B. Naik, Andrew Cockburn, Ludovic Godet
  • Patent number: 9466524
    Abstract: Methods for depositing metal layers, and more specifically TaN layers, using CVD and ALD techniques are provided. In one or more embodiments, the method includes sequentially exposing a substrate to a metal precursor, or more specifically a tantalum precursor, followed by a high frequency plasma.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: October 11, 2016
    Assignee: Applied Materials, Inc.
    Inventors: Paul F. Ma, Guojun Liu, Annamalai Lakshmanan, Dien-Yeh Wu, Anantha K. Subramani
  • Publication number: 20160204029
    Abstract: Methods and apparatus for forming a metal silicide as nanowires for back-end interconnection structures for semiconductor applications are provided. In one embodiment, the method includes forming a metal silicide stack comprising as plurality of metal silicide layers on a substrate by a chemical vapor deposition process or a physical vapor deposition process, thermal treating the metal silicide stack in a processing chamber, applying a microwave power in the processing chamber while thermal treating the metal silicide layer; and maintaining a substrate temperature less than 400 degrees Celsius while thermal treating the metal silicide layer.
    Type: Application
    Filed: December 18, 2015
    Publication date: July 14, 2016
    Inventors: Bencherki MEBARKI, Annamalai LAKSHMANAN, Kaushal K. SINGH, Paul F. MA, Mehul B. NAIK, Andrew COCKBURN, Ludovic GODET
  • Publication number: 20160204027
    Abstract: Methods for direct deposition of a metal silicide nanowire for back-end interconnection structures for semiconductor applications are provided. In one embodiment, the method includes positioning a substrate in a processing region of a process chamber, the substrate having a first surface comprising a non-dielectric material; and a dielectric layer formed on the first surface. An opening is formed in the dielectric layer, the opening exposing at least a portion of the first surface, the opening having sidewalls. A metal silicide seed is deposited in the opening using a PVD process, wherein the PVD process is performed with either no bias or a bias which creates deposition on the sidewall which is less than 1% of the deposition on the first surface. A metal silicide layer is then selectively deposited on the metal silicide seed using a metal-silicon organic precursor, creating the metal silicide nanowire.
    Type: Application
    Filed: December 18, 2015
    Publication date: July 14, 2016
    Inventors: Annamalai LAKSHMANAN, Bencherki MEBARKI, Kaushal K. SINGH, Paul F. MA, Mehul B. NAIK, Andrew COCKBURN, Ludovic GODET
  • Publication number: 20160118260
    Abstract: Methods and apparatus for forming a metal silicide as nanowires for back-end interconnection structures for semiconductor applications are provided. In one embodiment, the method includes forming a metal silicide layer on a substrate by a chemical vapor deposition process or a physical vapor deposition process, thermal treating the metal silicide layer in a processing chamber, applying a microwave power in the processing chamber while thermal treating the metal silicide layer; and maintaining a substrate temperature less than 400 degrees Celsius while thermal treating the metal silicide layer. In another embodiment, a method includes supplying a deposition gas mixture including at least a metal containing precursor and a reacting gas on a surface of a substrate, forming a plasma in the presence of the deposition gas mixture by exposure to microwave power, exposing the plasma to light radiation, and forming a metal silicide layer on the substrate from the deposition gas.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 28, 2016
    Inventors: Bencherki MEBARKI, Annamalai LAKSHMANAN, Kaushal K. SINGH, Andrew COCKBURN, Ludovic GODET, Paul F. MA, Mehul NAIK
  • Publication number: 20160032455
    Abstract: Methods of depositing a metal layer utilizing organometallic compounds. A substrate surface is exposed to a gaseous organometallic metal precursor and an organometallic metal reactant to form a metal layer (e.g., a copper layer) on the substrate.
    Type: Application
    Filed: July 31, 2015
    Publication date: February 4, 2016
    Inventors: Feng Q. Liu, Ben-Li Sheu, David Thompson, Mei Chang, Paul F. Ma, David Knapp, Jeffrey W. Anthis, Annamalai Lakshmanan
  • Patent number: 9157151
    Abstract: The present invention generally provides an apparatus and method for eliminating the “first wafer effect” for plasma enhanced chemical vapor deposition (PECVD). One embodiment of the present invention provides a method for preparing a chamber after the chamber being idle for a period of time. The method comprises a cleaning step followed by a season step and a heating step adapted to the length of the idle time.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: October 13, 2015
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Annamalai Lakshmanan, Ganesh Balasubramanian, Francimar Schmitt, Bok Hoen Kim
  • Publication number: 20150278733
    Abstract: A system for reviewing, surveying, and maintaining a facility or other area may include one or more mobile devices and a central computer processing unit. A computer software program may be operating on the one or more mobile devices. Using the software and the one or more mobile devices, one or more users may collect data and observations about events occurring at the facility, such as unsafe conditions of the facility or nearly catastrophic events. Maintenance may be scheduled, and reports may be generated, using the event data collected.
    Type: Application
    Filed: March 31, 2015
    Publication date: October 1, 2015
    Inventors: Annamalai Lakshmanan, Carlos Sua, Kevin M. O'Donnell, Anthony DiRocco, Roemer Ricardo, Juan Henry
  • Patent number: 9076661
    Abstract: Described are methods of forming a semiconductor device. Certain methods comprises depositing a film comprising manganese nitride over a dielectric; depositing a copper seed layer over the film; and depositing a copper fill layer over the copper seed layer. Also described are semiconductor devices. Certain semiconductor devices comprise a low-k dielectric layer; a manganese nitride layer overlying the low-k dielectric layer; a seed layer selected from a copper seed layer or electrochemical deposition seed layer overlying the manganese nitride layer; a copper layer overlying the copper seed layer.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: July 7, 2015
    Assignee: Applied Materials, Inc.
    Inventors: Paul F. Ma, Jennifer Meng Tseng, Mei Chang, Annamalai Lakshmanan, Jing Tang
  • Publication number: 20140220772
    Abstract: Described are methods for controlling the doping of metal nitride films such as TaN, TiN and MnN. The temperature during deposition of the metal nitride film may be controlled to provide a film density that permits a desired amount of doping. Dopants may include Ru, Cu, Co, Mn, Mo, Al, Mg, Cr, Nb, Ta, Ti and V. The metal nitride film may optionally be exposed to plasma treatment after doping.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 7, 2014
    Inventors: Annamalai Lakshmanan, Ben-Li Sheu, Guodan Wei, Nicole Lundy, Paul F. Ma
  • Patent number: 8642376
    Abstract: Methods for depositing a material atop a substrate are provided herein. In some embodiments, a method of depositing a material atop a substrate may include exposing a substrate to a silicon containing gas and a reducing gas; increasing a flow rate of the silicon containing gas while decreasing a flow rate of the reducing gas to form a first layer; and depositing a second layer atop the first layer.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: February 4, 2014
    Assignee: Applied Materials, Inc.
    Inventors: Sukti Chatterjee, Annamalai Lakshmanan, Joe Griffith Cruz, Pravin K. Narwankar
  • Publication number: 20130292806
    Abstract: Described are methods of forming a semiconductor device. Certain methods comprises depositing a film comprising manganese nitride over a dielectric; depositing a copper seed layer over the film; and depositing a copper fill layer over the copper seed layer. Also described are semiconductor devices. Certain semiconductor devices comprise a low-k dielectric layer; a manganese nitride layer overlying the low-k dielectric layer; a seed layer selected from a copper seed layer or electrochemical deposition seed layer overlying the manganese nitride layer; a copper layer overlying the copper seed layer.
    Type: Application
    Filed: May 30, 2013
    Publication date: November 7, 2013
    Inventors: Paul F. Ma, Jennifer Meng Tseng, Mei Chang, Annamalai Lakshmanan, Jing Tang
  • Publication number: 20130230986
    Abstract: Methods are provided for processing a substrate for depositing an adhesion layer between a conductive material and a dielectric layer. In one aspect, the invention provides a method for processing a substrate including positioning a substrate having a conductive material disposed thereon, introducing a reducing compound or a silicon based compound, exposing the conductive material to the reducing compound or the silicon based compound, and depositing a silicon carbide layer without breaking vacuum.
    Type: Application
    Filed: February 15, 2013
    Publication date: September 5, 2013
    Applicant: Applied Materials, Inc.
    Inventors: NAGARAJAN RAJAGOPALAN, Mei-yee Shek, Albert Lee, Annamalai Lakshmanan, Li-Qun Xia, Zhenjiang Cui
  • Publication number: 20130196507
    Abstract: Methods for depositing metal layers, and more specifically TaN layers, using CVD and ALD techniques are provided. In one or more embodiments, the method includes sequentially exposing a substrate to a metal precursor, or more specifically a tantalum precursor, followed by a high frequency plasma.
    Type: Application
    Filed: January 16, 2013
    Publication date: August 1, 2013
    Inventors: Paul F. Ma, Guojun Liu, Annamalai Lakshmanan, Dien-Yeh Wu, Anantha K. Subramani
  • Publication number: 20130140698
    Abstract: Described are doped TaN films, as well as methods for providing the doped TaN films. Doping TaN films with Ru, Cu, Co, Mn, Al, Mg, Cr, Nb, Ti and/or V allows for enhanced copper barrier properties of the TaN films. Also described are methods of providing films with a first layer comprising doped TaN and a second layer comprising one or more of Ru and Co, with optional doping of the second layer.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 6, 2013
    Inventors: Annamalai Lakshmanan, Paul F. Ma, Mei Chang, Jennifer Shan
  • Publication number: 20130012030
    Abstract: An apparatus and methods for depositing amorphous and microcrystalline silicon films during the formation of solar cells are provided. In one embodiment, a method and apparatus is provided for generating and introducing hydrogen radicals directly into a processing region of a processing chamber for reaction with a silicon-containing precursor for film deposition on a substrate. In one embodiment, the hydrogen radicals are generated by a remote plasma source and directly introduced into the processing region via a line of sight path to minimize the loss of energy by the hydrogen radicals prior to reaching the processing region.
    Type: Application
    Filed: March 17, 2010
    Publication date: January 10, 2013
    Applicant: Applied Materials, Inc.
    Inventors: Annamalai Lakshmanan, Jianshe Tang, Dustin W. Ho, Francimar C. Schmitt, Alan Tso, Tom K. Cho, Brian Sy-Yuan Shieh, Hari K. Ponnekanti, Chris Eberspacher, Zheng Yuan