Patents by Inventor Qichen Feng

Qichen Feng 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).

  • Method of producing thin film and nanoparticle deposits using charges of alternating polarity
    Patent number: 6060128
    Abstract: A method for producing a thin film or nanoparticle deposit includes the step of providing a working liquid, movement of the working liquid at a liquid surface prevented by surface tension. The method also includes the steps of supplying an electric charge having a first polarity to the working liquid at the liquid surface to overcome surface tension at the liquid surface to produce a first plurality of charged nanodrops and directing the first plurality of charged nanodrops against a substrate surface. The method further includes the steps of supplying an electric charge having a second polarity to the working liquid at the liquid surface, the second polarity being opposite to the first polarity, to overcome surface tension at the liquid surface to produce a second plurality of charged nanodrops, and directing the second plurality of charged nanodrops against the substrate surface.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: May 9, 2000
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Kyekyoon Kim, Qichen Feng
  • Method and apparatus for producing thin film and nanoparticle deposits
    Patent number: 5948483
    Abstract: A method for producing a thin film or nanoparticle deposit includes the step of providing a working liquid, movement of the working liquid at a liquid surface prevented by surface tension. The method also includes the steps of supplying an electric charge having a first polarity to the working liquid at the liquid surface to overcome surface tension at the liquid surface to produce a first plurality of charged nanodrops and directing the first plurality of charged nanodrops against a substrate surface. The method further includes the steps of supplying an electric charge having a second polarity to the working liquid at the liquid surface, the second polarity being opposite to the first polarity, to overcome surface tension at the liquid surface to produce a second plurality of charged nanodrops, and directing the second plurality of charged nanodrops against the substrate surface.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: September 7, 1999
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Kyekyoon Kim, Qichen Feng