Patents by Inventor Thirumal Thanigaivelan

Thirumal Thanigaivelan 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: 8012843
    Abstract: An improved method of performing pocket or halo implants is disclosed. The amount of damage and defects created by the halo implant degrades the performance of the semiconductor device, by increasing leakage current, decreasing the noise margin and increasing the minimum gate voltage. The halo or packet implant is performed at cold temperature, which decreases the damage caused to the crystalline structure and improves the amorphization of the crystal. The use of cold temperature also allows the use of lighter elements for the halo implant, such as boron or phosphorus.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: September 6, 2011
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Christopher R. Hatem, Benjamin Colombeau, Thirumal Thanigaivelan, Kyu-Ha Shim, Dennis Rodier
  • Publication number: 20110034014
    Abstract: A method of applying a silicide to a substrate while minimizing adverse effects, such as lateral diffusion of metal or “piping” is disclosed. The implantation of the source and drain regions of a semiconductor device are performed at cold temperatures, such as below 0° C. This cold implant reduces the structural damage caused by the impacting ions. Subsequently, a silicide layer is applied, and due to the reduced structural damage, metal diffusion and piping into the substrate is lessened. In some embodiments, an amorphization implant is performed after the implantation of dopants, but prior to the application of the silicide. By performing this pre-silicide implant at cold temperatures, similar results can be obtained.
    Type: Application
    Filed: August 4, 2010
    Publication date: February 10, 2011
    Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.
    Inventors: Christopher R. Hatem, Benjamin Colombeau, Thirumal Thanigaivelan, Kyu-Ha Shim, Jay T. Scheuer
  • Publication number: 20110033998
    Abstract: An improved method of performing pocket or halo implants is disclosed. The amount of damage and defects created by the halo implant degrades the performance of the semiconductor device, by increasing leakage current, decreasing the noise margin and increasing the minimum gate voltage. The halo or packet implant is performed at cold temperature, which decreases the damage caused to the crystalline structure and improves the amorphization of the crystal. The use of cold temperature also allows the use of lighter elements for the halo implant, such as boron or phosphorus.
    Type: Application
    Filed: August 5, 2010
    Publication date: February 10, 2011
    Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.
    Inventors: Christopher R. Hatem, Benjamin Colombeau, Thirumal Thanigaivelan, Kyu-Ha Shim, Dennis Rodier
  • Patent number: 7767583
    Abstract: Embodiments of this method improve the results of a chemical mechanical polishing (CMP) process. A surface is implanted with a species, such as, for example, Si, Ge, As, B, P, H, He, Ne, Ar, Kr, Xe, and C. The implant of this species will at least affect dishing, erosion, and polishing rates of the CMP process. The species may be selected in one embodiment to either accelerate or decelerate the CMP process. The dose of the species may be varied over the surface in one particular embodiment.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: August 3, 2010
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Deepak Ramappa, Thirumal Thanigaivelan
  • Publication number: 20090227087
    Abstract: Embodiments of this method improve the results of a chemical mechanical polishing (CMP) process. A surface is implanted with a species, such as, for example, Si, Ge, As, B, P, H, He, Ne, Ar, Kr, Xe, and C. The implant of this species will at least affect dishing, erosion, and polishing rates of the CMP process. The species may be selected in one embodiment to either accelerate or decelerate the CMP process. The dose of the species may be varied over the surface in one particular embodiment.
    Type: Application
    Filed: December 10, 2008
    Publication date: September 10, 2009
    Applicant: Varian Semiconductor Equipment associates, Inc.
    Inventors: Deepak RAMAPPA, Thirumal Thanigaivelan