Patents by Inventor Khaled Z. Ahmed

Khaled Z. Ahmed 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: 9441298
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: September 13, 2016
    Assignee: Applied Materials, Inc.
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Patent number: 9373516
    Abstract: Provided are methods and apparatus for functionalizing a substrate surface used as the channel in a gate stack. Silicon, germanium and silicon germanium substrates surfaces are functionalized with one or more of sulfur and selenium by plasma processing.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: June 21, 2016
    Assignee: Applied Materials, Inc.
    Inventors: Khaled Z. Ahmed, Steven Hung, Kaushal K. Singh, Sundar Ramamurthy
  • Publication number: 20160068962
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Application
    Filed: November 12, 2015
    Publication date: March 10, 2016
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Patent number: 9190320
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: November 17, 2015
    Assignee: Applied Materials, Inc.
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Patent number: 9093264
    Abstract: Described are apparatus and methods for forming silicon interfacial layers on germanium or III-V materials. Such silicon layers may be deposited by atomic layer deposition at specific temperatures to avoid interdiffusion of silicon and the germanium or III-V material.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: July 28, 2015
    Assignee: Applied Materials, Inc.
    Inventor: Khaled Z. Ahmed
  • Patent number: 8993058
    Abstract: Described are apparatus and methods for forming tantalum silicate layers on germanium or III-V materials. Such tantalum silicate layers may have Si/(Ta+Si) atomic ratios from about 0.01 to about 0.15. The tantalum silicate layers may be formed by atomic layer deposition of silicon oxide and tantalum oxide, followed by interdiffusion of the silicon oxide and tantalum oxide layers.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: March 31, 2015
    Assignee: Applied Materials, Inc.
    Inventors: Jeffrey W. Anthis, Khaled Z. Ahmed
  • Publication number: 20140065842
    Abstract: Described are apparatus and methods for forming tantalum silicate layers on germanium or III-V materials. Such tantalum silicate layers may have Si/(Ta+Si) atomic ratios from about 0.01 to about 0.15. The tantalum silicate layers may be formed by atomic layer deposition of silicon oxide and tantalum oxide, followed by interdiffusion of the silicon oxide and tantalum oxide layers.
    Type: Application
    Filed: August 27, 2013
    Publication date: March 6, 2014
    Inventors: Jeffrey W. Anthis, Khaled Z. Ahmed
  • Publication number: 20140065798
    Abstract: Provided are methods and apparatus for functionalizing a substrate surface used as the channel in a gate stack. Silicon, germanium and silicon germanium substrates surfaces are functionalized with one or more of sulfur and selenium by plasma processing.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 6, 2014
    Inventors: Khaled Z. Ahmed, Steven Hung, Kaushal K. Singh, Sundar Ramamurthy
  • Publication number: 20130280918
    Abstract: Described are apparatus and methods for forming silicon interfacial layers on germanium or III-V materials. Such silicon layers may be deposited by atomic layer deposition at specific temperatures to avoid interdiffusion of silicon and the germanium or III-V material.
    Type: Application
    Filed: April 18, 2013
    Publication date: October 24, 2013
    Inventor: Khaled Z. AHMED
  • Publication number: 20130200518
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Application
    Filed: January 24, 2013
    Publication date: August 8, 2013
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Patent number: 7902018
    Abstract: Embodiments of the present invention generally provide a method for forming a dielectric material with reduced bonding defects on a substrate. In one embodiment, the method comprises forming a dielectric layer having a desired thickness on a surface of a substrate, exposing the substrate to a low energy plasma comprising a fluorine source gas to form a fluorinated dielectric layer on the substrate without etching the dielectric layer, and forming a gate electrode on the substrate. In certain embodiments, the fluorine source gas is a carbon free gas. In certain embodiments, the method further comprises co-flowing a gas selected from the group consisting of argon, helium, N2, O2, and combinations thereof with the fluorine source gas.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: March 8, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Philip Allan Kraus, Christopher Olsen, Khaled Z. Ahmed
  • Patent number: 7888217
    Abstract: A method for fabricating a gate dielectric of a field effect transistor is disclosed herein. In one embodiment, the method includes the steps of removing a native oxide layer, forming an oxide layer, forming a gate dielectric layer over the oxide layer, oxidizing the gate dielectric layer, and annealing the layers and underlying thermal oxide/silicon interface. Optionally, the oxide layer may be nitridized prior to forming the gate dielectric layer. Optionally, the gate dielectric layer may be nitridized prior to oxidizing the gate dielectric layer. In one embodiment, at least portions of the method are performed using processing reactors arranged on a cluster tool.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: February 15, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Thai Cheng Chua, Cory Czarnik, Christopher Sean Olsen, Khaled Z. Ahmed, Philip Allan Kraus
  • Patent number: 7871942
    Abstract: Processes for making a high K (dielectric constant) film using an ultra-high purity hafnium containing organometallic compound are disclosed. Also described are devices incorporating high K films made with high purity hafnium containing organometallic compounds.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: January 18, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Shreyas S. Kher, Pravin K. Narwankar, Khaled Z. Ahmed, Yi Ma
  • Patent number: 7863193
    Abstract: Post-laser annealing dopant deactivation is minimized by performing certain silicide formation process steps prior to laser annealing. A base metal layer is deposited on the source-drain regions and the gate electrode, followed by deposition of an overlying compression cap layer, to prevent metal agglomeration at the silicon melting temperature. Thereafter, a rapid thermal process is performed to heat the substrate sufficiently to form metal silicide contacts at the top surfaces of the source-drain regions and of the gate electrode. The method further includes removing the remainder of the metal-containing layer and then depositing an optical absorber layer over the substrate prior to laser annealing near the silicon melting temperature.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: January 4, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Yi Ma, Philip Allan Kraus, Christopher Sean Olsen, Khaled Z. Ahmed, Abhilash J. Mayur
  • Patent number: 7737036
    Abstract: Post-laser annealing dopant deactivation is minimized by performing certain low temperature process steps prior to laser annealing.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: June 15, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Yi Ma, Philip Allan Kraus, Christopher Sean Olsen, Khaled Z. Ahmed, Abhilash J. Mayur
  • Patent number: 7727828
    Abstract: A method for fabricating a gate dielectric of a field effect transistor is provided. In one embodiment, the method includes removing a native oxide layer, forming an oxide layer, forming a gate dielectric layer over the oxide layer, forming an oxide layer over the gate dielectric layer, and annealing the layers and underlying thermal oxide/silicon interface. Optionally, the oxide layer may be nitridized prior to forming the gate dielectric layer. In one embodiment, the oxide layer on the substrate is formed by depositing the oxide layer, and the oxide layer on the gate dielectric layer is formed by oxidizing at least a portion of the gate dielectric layer using an oxygen-containing plasma. In another embodiment, the oxide layer on the gate dielectric layer is formed by forming a thermal oxide layer, i.e., depositing the oxide layer on the gate dielectric layer.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: June 1, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Thai Cheng Chua, Cory Czarnik, Andreas G. Hegedus, Christopher Sean Olsen, Khaled Z. Ahmed, Philip Allan Kraus
  • Patent number: 7611976
    Abstract: Embodiments of the invention generally provide a method for forming a doped silicon-containing material on a substrate. In one embodiment, the method provides depositing a polycrystalline layer on a dielectric layer and implanting the polycrystalline layer with a dopant to form a doped polycrystalline layer having a dopant concentration within a range from about 1×1019 atoms/cm3 to about 1×1021 atoms/cm3, wherein the doped polycrystalline layer contains silicon or may contain germanium, carbon, or boron. The substrate may be heated to a temperature of about 800° C. or higher, such as about 1,000° C., during the rapid thermal anneal. Subsequently, the doped polycrystalline layer may be exposed to a laser anneal and heated to a temperature of about 1,000° C. or greater, such within a range from about 1,050° C. to about 1,400° C., for about 500 milliseconds or less, such as about 100 milliseconds or less.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: November 3, 2009
    Assignee: Applied Materials, Inc.
    Inventors: Yi Ma, Khaled Z. Ahmed, Kevin L. Cunningham, Robert C. McIntosh, Abhilash J. Mayur, Haifan Liang, Mark Yam, Toi Yue Becky Leung, Christopher Olsen, Shulin Wang, Majeed Foad, Gary Eugene Miner
  • Publication number: 20090246972
    Abstract: Processes for making a high K (dielectric constant) film using an ultra-high purity hafnium containing organometallic compound are disclosed. Also described are devices incorporating high K films made with high purity hafnium containing organometallic compounds.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 1, 2009
    Inventors: SHREYAS S. KHER, Pravin K. Narwankar, Khaled Z. Ahmed, Yi Ma
  • Publication number: 20090042354
    Abstract: Post-laser annealing dopant deactivation is minimized by performing certain silicide formation process steps prior to laser annealing. A base metal layer is deposited on the source-drain regions and the gate electrode, followed by deposition of an overlying compression cap layer, to prevent metal agglomeration at the silicon melting temperature. Thereafter, a rapid thermal process is performed to heat the substrate sufficiently to form metal silicide contacts at the top surfaces of the source-drain regions and of the gate electrode. The method further includes removing the remainder of the metal-containing layer and then depositing an optical absorber layer over the substrate prior to laser annealing near the silicon melting temperature.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 12, 2009
    Inventors: YI Ma, Philip Allan Kraus, Christopher Sean Olsen, Khaled Z. Ahmed, Abhilash J. Mayur
  • Publication number: 20090042353
    Abstract: Post-laser annealing dopant deactivation is minimized by performing certain silicide formation process steps prior to laser annealing. A base metal layer of nickel is deposited on the source-drain regions and the gate electrode, followed by deposition of an overlying layer of a metal having a higher melting temperature than nickel. Thereafter, a rapid thermal process is performed to heat the substrate sufficiently to form metal silicide contacts at the top surfaces of the source-drain regions and of the gate electrode. The method further includes removing the remainder of the metal-containing layer and then depositing an optical absorber layer over the substrate prior to laser annealing.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 12, 2009
    Inventors: Yi Ma, Philip Allan Kraus, Christopher Sean Olsen, Khaled Z. Ahmed, Abhilash J. Mayur