Patents by Inventor Ronald Allan Powell

Ronald Allan Powell 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: 6616985
    Abstract: An apparatus and method for injecting gas within a plasma reactor and tailoring the distribution of an active species generated by the remote plasma source over the substrate or wafer. The distribution may be uniform, wafer-edge concentrated, or wafer-center concentrated. A contoured plate or profiler modifies the distribution. The profiler is an axially symmetric plate, having a narrow top end and a wider bottom end, shaped to redistribute the gas flow incident upon it. The method for tailoring the distribution of the active species over the substrate includes predetermining the profiler diameter and adjusting the profiler height over the substrate.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: September 9, 2003
    Assignee: Novellus Systems, Inc.
    Inventors: Ronald Allan Powell, Gabriel I. Font-Rodriguez, Simon Selitser, Emerson Derryck Settles
  • Patent number: 6554914
    Abstract: The present invention pertains to systems and methods for passivating the copper seed layer deposited in Damascene integrated circuit manufacturing. More specifically, the invention pertains to systems and methods for depositing the copper seed layer by physical vapor deposition, while passivating the copper during or immediately after the deposition in order to prevent excessive oxidation of the copper. The invention is applicable to dual Damascene processing.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: April 29, 2003
    Assignee: Novellus Systems, Inc.
    Inventors: Robert T. Rozbicki, Ronald Allan Powell, Erich Klawuhn, Michal Danek, Karl B. Levy, Jonathan David Reid, Mukul Khosla, Eliot K. Broadbent
  • Patent number: 6553933
    Abstract: This invention provides an apparatus for injecting gas within a plasma reactor and tailoring the distribution of an active species generated by the remote plasma source over the substrate or wafer. The distribution may be made more or less uniform, wafer-edge concentrated, or wafer-center concentrated. A contoured plate or profiler is provided for modifying the distribution. The profiler is an axially symmetric plate, having a narrow top end and a wider bottom end, shaped to redistribute the gas flow incident upon it. The profiler is situated below an input port within the plasma reactor chamber and above the wafer. The method for tailoring the distribution of the active species over the substrate includes predetermining the profiler diameter and adjusting the profiler height over the substrate.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: April 29, 2003
    Assignee: Novellus Systems, Inc.
    Inventors: Ronald Allan Powell, Gabriel I. Font-Rodriguez, Simon Selitser, Emerson Derryck Settles
  • Patent number: 6287643
    Abstract: An apparatus and method for injecting gas within a plasma reactor and tailoring the distribution of an active species generated by the remote plasma source over the substrate or wafer. The distribution may be uniform, wafer-edge concentrated, or wafer-center concentrated. A contoured plate or profiler modifies the distribution. The profiler is an axially symmetric plate, having a narrow top end and a wider bottom end, shaped to redistribute the gas flow incident upon it. The method for tailoring the distribution of the active species over the substrate includes predetermining the profiler diameter and adjusting the profiler height over the substrate.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: September 11, 2001
    Assignee: Novellus Systems, Inc.
    Inventors: Ronald Allan Powell, Gabriel I. Font-Rodriguez, Simon Selitser, Emerson Derryck Settles
  • Patent number: 5703689
    Abstract: A broadband optical detector is disposed to measure the total intensity I(.lambda., .alpha.) attributed to a portion of the optical spectrum passed by a sharp bandgap optical transmission element as the bandgap is caused to translate over a desired wavelength interval by a band gap control parameter, T. The differential spectrum of the incident optical radiation is recovered by the differentiation of I(.lambda., .alpha.) in respect to the parameter T.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: December 30, 1997
    Assignee: Varian Associates, Inc.
    Inventor: Ronald Allan Powell