Patents by Inventor Kamesh V. Gadepally

Kamesh V. Gadepally 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: 6737343
    Abstract: A method for forming metal salicide regions and metal salicide exclusion regions in an integrated circuit (IC) that requires a minimum number of steps and is compatible with standard MOS processing techniques. An IC structure is first provided, with the IC structure including a plurality of MOS transistor structures with exposed silicon surfaces, such as source regions, drain regions and polysilicon gates. A metal layer (e.g., cobalt, titanium, tantalum, nickel or molybdenum) is then deposited over the IC structure in a controlled manner. A photoresist masking layer is then formed on those MOS transistor structures where metal salicide regions are to be formed. The metal layer from those MOS transistor structures where metal salicide exclusion regions are to be formed is then removed.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: May 18, 2004
    Assignee: National Semiconductor Corporation
    Inventor: Kamesh V. Gadepally
  • Patent number: 6329287
    Abstract: A process for the formation of metal salicide regions and metal salicide exclusion regions in an integrated circuit (IC) that requires a minimum number of steps and is compatible with standard MOS processing techniques. In the process, an IC structure is first provided. The IC structure includes a plurality of MOS transistor structures with exposed silicon surfaces, such as source regions, drain regions and polysilicon gates. A metal layer (e.g., cobalt, titanium, tantalum, nickel or molybdenum) is then deposited over the IC structure, followed by the formation of a photoresist masking layer on those MOS transistor structures where metal salicide regions are to be formed. The metal layer from those MOS transistor structures where metal salicide exclusion regions are to be formed is then removed, followed by stripping of the photoresist masking layer from those MOS transistor structures where metal salicide regions are to be formed.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: December 11, 2001
    Assignee: National Semiconductor Corporation
    Inventor: Kamesh V. Gadepally
  • Patent number: 6225666
    Abstract: A low stress active area silicon island structure with a reduced susceptibility to gate polysilicon layer “wraparound” and stringer formation during subsequent semiconductor manufacturing. The structure includes a semiconductor substrate (e.g. a silicon wafer) with an electrical insulation layer (e.g. a SiO2 layer) thereon. The electrical insulation layer has an active area opening extending from its surface to the surface of the underlying semiconductor substrate. The structure also includes an active area silicon island filling the active area opening. A cross-section of the active area silicon island perpendicular to the surface of the semiconductor substrate has a non-rectangular profile, for example a “wineglass” profile. A process for the formation of a low stress active area silicon island structure includes first providing a semiconductor substrate, followed by forming an electrical insulation layer thereon.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: May 1, 2001
    Assignee: National Semiconductor Corporation
    Inventor: Kamesh V. Gadepally
  • Patent number: 5173121
    Abstract: A novel apparatus for the deposition of silicon and the formation of silicon films. More specifically, the process provides an aerosol generating technique, wherein silicon powder of optimum particle size is aerosolized, charged, and then electrostatically deposited onto high melting point substrates, which may include semiconducting, insulating, and conducting materials such as silicon, sapphire, and molybdenum, respectively. The powder coated substrates are subsequently heat treated at optimum times and temperatures, resulting in the formation of polycrystalline silicon films.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: December 22, 1992
    Assignee: The Board of Trustees of the University of Little Rock
    Inventors: Roger M. Hawk, Kamesh V. Gadepally
  • Patent number: 5075257
    Abstract: A novel method for the deposition of silicon and the formation of silicon films. More specifically, the process provides an aerosol generating technique, wherein silicon powder of optimum particle size is aerosolized, charged, and then electrostatically deposited onto high melting point substrates, which may include semiconducting, insulating, and conducting materials such as silicon, sapphire, and molybdenum, respectively. The powder coated substrates are subsequently heat treated at optimum times and temperatures, resulting in the formation of polycrystalline silicon films.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: December 24, 1991
    Assignee: The Board of Trustees of the University of Arkansas
    Inventors: Roger M. Hawk, Kamesh V. Gadepally