Patents by Inventor Sunit Tyagi

Sunit Tyagi 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: 7422950
    Abstract: A MOS device comprises a gate stack comprising a gate electrode disposed on a gate dielectric, a first spacer and a second spacer formed on laterally opposite sides of the gate stack, a source region proximate to the first spacer, a drain region proximate to the second spacer, and a channel region subjacent to the gate stack and disposed between the source region and the drain region. The MOS device of the invention further includes a buried oxide (BOX) region subjacent to the channel region and disposed between the source region and the drain region. The BOX region enables deeper source and drain regions to be formed to reduce transistor resistance and silicide spike defects while preventing gate edge junction parasitic capacitance.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: September 9, 2008
    Assignee: Intel Corporation
    Inventors: Giuseppe Curello, Hemant V. Deshpande, Sunit Tyagi, Mark Bohr
  • Patent number: 7335959
    Abstract: Embodiments of the invention provide a transistor with stepped source and drain regions. The stepped regions may provide significant strain in a channel region while minimizing current leakage. The stepped regions may be formed by forming two recesses in a substrate to result in a stepped recess, and forming the source/drain regions in the recesses.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: February 26, 2008
    Assignee: Intel Corporation
    Inventors: Giuseppe Curello, Bernhard Sell, Sunit Tyagi, Chris Auth
  • Publication number: 20080036005
    Abstract: Complementary metal oxide semiconductor transistors are formed on a silicon substrate. The substrate has a {100} crystallographic orientation. The transistors are formed on the substrate so that current flows in the channels of the transistors are parallel to the <100> direction. Additionally, longitudinal tensile stress is applied to the channels.
    Type: Application
    Filed: October 17, 2007
    Publication date: February 14, 2008
    Inventors: Mark Armstrong, Gerhard Schrom, Sunit Tyagi, Paul Packan, Kelin Kuhn, Scott Thompson
  • Patent number: 7312485
    Abstract: Complementary metal oxide semiconductor transistors are formed on a silicon substrate. The substrate has a {100} crystallographic orientation. The transistors are formed on the substrate so that current flows in the channels of the transistors are parallel to the <100> direction. Additionally, longitudinal tensile stress is applied to the channels.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: December 25, 2007
    Assignee: Intel Corporation
    Inventors: Mark Armstrong, Gerhard Schrom, Sunit Tyagi, Paul A. Packan, Kelin J. Kuhn, Scott Thompson
  • Publication number: 20070145495
    Abstract: A method including forming a transistor structure structure comprising a gate electrode over an active region of a substrate, the active region defined by a trench isolation structure and changing a performance of a narrow width transistor with respect to a wide width transistor by introducing a dopant into the active region adjacent an interface defined by the trench isolation structure and the gate electrode. A structure including a gate electrode formed on a substrate, an active region adjacent an interface defined by a trench isolation structure and a gate electrode and an implant within the active region to change a performance of a transistor.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 28, 2007
    Inventors: Giuseppe Curello, Sivakumar Mudanai, Nick Lindert, Leonard Pipes, M. Shaheed, Sunit Tyagi
  • Publication number: 20070134859
    Abstract: A MOS device comprises a gate stack comprising a gate electrode disposed on a gate dielectric, a first spacer and a second spacer formed on laterally opposite sides of the gate stack, a source region proximate to the first spacer, a drain region proximate to the second spacer, and a channel region subjacent to the gate stack and disposed between the source region and the drain region. The MOS device of the invention further includes a buried oxide (BOX) region subjacent to the channel region and disposed between the source region and the drain region. The BOX region enables deeper source and drain regions to be formed to reduce transistor resistance and silicide spike defects while preventing gate edge junction parasitic capacitance.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 14, 2007
    Inventors: Giuseppe Curello, Hemant Deshpande, Sunit Tyagi, Mark Bohr
  • Publication number: 20070132034
    Abstract: A semiconductor device and method for its fabrication are described. An isolation body may be formed prior to formation of an active region. In one embodiment, the isolation body is void-free.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 14, 2007
    Inventors: Giuseppe Curello, Mark Bohr, Hemant Deshpande, Sunit Tyagi
  • Publication number: 20070132057
    Abstract: A semiconductor device and method for its fabrication are described. An active region spacer may be formed on a top surface of an isolation region and adjacent to a sidewall of an active region. In one embodiment, the active region spacer may suppress the formation of metal pipes in the active region.
    Type: Application
    Filed: December 8, 2005
    Publication date: June 14, 2007
    Inventors: Giuseppe Curello, Ian Post, Chia-Hong Jan, Sunit Tyagi, Mark Bohr
  • Publication number: 20070022360
    Abstract: A method comprising running an error correction code on data and storing the data and the result of the error correction code in memory, running an error correction code on the data when it is read from the memory, comparing the results of the error correction codes on the data from before and after the memory, correcting errors when the comparator determines a difference in the results of the error correction codes and lowering the operating voltage of the memory array while using the error correction.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 25, 2007
    Inventors: Nivruti Rai, Anshumali Kumar, Edward Burton, Sunit Tyagi, Jeffrey Miller
  • Publication number: 20070004114
    Abstract: A process for fabricating an n channel transistor, which results in electron mobility improvement in the channel, is described. Sacrificial capping layers comprising an oxide and nitride layer are conformally formed over a polysilicon gate after source and drain implantation, and remain in place during annealing.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 4, 2007
    Inventors: Seok-Hee Lee, Sanjay Natarajan, Ramune Nagisetty, Sunit Tyagi, Guiseppe Curello
  • Publication number: 20060145273
    Abstract: Embodiments of the invention provide a transistor with stepped source and drain regions. The stepped regions may provide significant strain in a channel region while minimizing current leakage. The stepped regions may be formed by forming two recesses in a substrate to result in a stepped recess, and forming the source/drain regions in the recesses.
    Type: Application
    Filed: January 6, 2005
    Publication date: July 6, 2006
    Inventors: Giuseppe Curello, Bernhard Sell, Sunit Tyagi, Chris Auth
  • Publication number: 20060084216
    Abstract: Various methods for forming a layer of strained silicon in a channel region of a device and devices constructed according to the disclosed methods. In one embodiment, a strain-inducing layer is formed, a relaxed layer is formed on the strain-inducing layer, a portion of the strain-inducing layer is removed, which allows the strain-inducing layer to relax and strain the relaxed layer.
    Type: Application
    Filed: December 1, 2005
    Publication date: April 20, 2006
    Inventors: Stephen Cea, Ravindra Soman, Ramune Nagisetty, Sunit Tyagi, Sanjay Natarajan
  • Publication number: 20060065937
    Abstract: A method of providing a halo implant region in a substrate of a MOS device having a gate electrode thereon and defining source/drain regions, a MOS device fabricated according to the above method, and a system comprising the MOS device. The method comprises: defining undercut recesses in the substrate at the source/drain regions thereof, the undercut recesses extending beneath the gate electrode; creating a halo implant region beneath the gate electrode between the recesses; and providing raised source/drain structures in the undercut recesses after creating the halo implant region.
    Type: Application
    Filed: September 30, 2004
    Publication date: March 30, 2006
    Inventors: Thomas Hoffmann, Sunit Tyagi, Giuseppe Curello, Berhard Sell, Christopher Auth
  • Patent number: 7019326
    Abstract: Various methods for forming a layer of strained silicon in a channel region of a device and devices constructed according to the disclosed methods. In one embodiment, a strain-inducing layer is formed, a relaxed layer is formed on the strain-inducing layer, a portion of the strain-inducing layer is removed, which allows the strain-inducing layer to relax and strain the relaxed layer.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: March 28, 2006
    Assignee: Intel Corporation
    Inventors: Stephen M. Cea, Ravindra Soman, Ramune Nagisetty, Sunit Tyagi, Sanjay Natarajan
  • Publication number: 20050106792
    Abstract: Various methods for forming a layer of strained silicon in a channel region of a device and devices constructed according to the disclosed methods. In one embodiment, a strain-inducing layer is formed, a relaxed layer is formed on the strain-inducing layer, a portion of the strain-inducing layer is removed, which allows the strain-inducing layer to relax and strain the relaxed layer.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 19, 2005
    Inventors: Stephen Cea, Ravindra Soman, Ramune Nagisetty, Sunit Tyagi, Sanjay Natarajan
  • Patent number: 6787440
    Abstract: A method for making a semiconductor device is described. That method comprises forming on a substrate a buffer layer and a high-k gate dielectric layer, oxidizing the surface of the high-k gate dielectric layer, and then forming a gate electrode on the oxidized high-k gate dielectric layer.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: September 7, 2004
    Assignee: Intel Corporation
    Inventors: Christopher G. Parker, Markus Kuhn, Ying Zhou, Scott A. Hareland, Suman Datta, Nick Lindert, Robert S. Chau, Timothy E. Glassman, Matthew V. Metz, Sunit Tyagi
  • Publication number: 20040110361
    Abstract: A method for making a semiconductor device is described. That method comprises forming on a substrate a buffer layer and a high-k gate dielectric layer, oxidizing the surface of the high-k gate dielectric layer, and then forming a gate electrode on the oxidized high-k gate dielectric layer.
    Type: Application
    Filed: December 10, 2002
    Publication date: June 10, 2004
    Inventors: Christopher G. Parker, Markus Kuhn, Ying Zhou, Scott A. Hareland, Suman Datta, Nick Lindert, Robert S. Chau, Timothy E. Glassman, Matthew V. Metz, Sunit Tyagi
  • Publication number: 20040080356
    Abstract: A pair of C-shaped gate electrodes may define a pair of transistors and a pair of diodes for forming an input/output signal driver for electrostatic discharge protection. Because of the compact arrangement, silicon real estate may be conserved in silicon-on-insulator substrates.
    Type: Application
    Filed: October 25, 2002
    Publication date: April 29, 2004
    Inventors: Scott A. Hareland, Sunit Tyagi
  • Patent number: 6458667
    Abstract: An improved MOS transistor and method for making it are described. The MOS transistor's source and drain have a first conductivity type and are separated from each other by a first region having a second conductivity type opposite to the first conductivity type. A second region, also having the second conductivity type, is formed adjacent to the drain and is separated from the first region by the drain.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: October 1, 2002
    Assignee: Intel Corporation
    Inventors: Sunit Tyagi, Shahriar S. Ahmed
  • Publication number: 20020063292
    Abstract: Complementary metal oxide semiconductor transistors are formed on a silicon substrate. The substrate has a {100} crystallographic orientation. The transistors are formed on the substrate so that current flows in the channels of the transistors are parallel to the <100>direction. Additionally, longitudinal tensile stress is applied to the channels.
    Type: Application
    Filed: November 29, 2000
    Publication date: May 30, 2002
    Inventors: Mark Armstrong, Gerhard Schrom, Sunit Tyagi, Paul A. Packan, Kelin J. Kuhn, Scott Thompson