The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 1999
Filed:
Mar. 25, 1997
Kyekyoon Kim, Urbana, IL (US);
Qichen Feng, Champaign, IL (US);
The Board of Trustees of the University of Illinois, Urbana, IL (US);
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. The method additionally includes the step of alternating between supplying the electric charge having the first polarity and supplying the electric charge having the second polarity to the working liquid at the liquid surface. An apparatus for producing a thin film or nanoparticle deposit includes an apparatus for supplying a working liquid, surface tension preventing movement of the working liquid from the apparatus for supplying a working fluid at a liquid surface, an apparatus for supplying an electric charge to the working liquid at the liquid surface to overcome the surface tension to produce a stream of nanodrops, and an apparatus for supplying electric charge of alternating polarity to the apparatus for supplying the electric charge to the working liquid at the liquid surface.