Patents by Inventor Thomas R. Hebner

Thomas R. Hebner 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: 7090890
    Abstract: The methods of this invention involve modification of the properties of an organic film after it has been deposited by either adding new components into it from its top or bottom surface, or by causing components to leave the film from its top or bottom surface. In the examples of these methods, the emitting color of light-emitting diodes are modified based on doped polymers by locally introducing dopants causing different color emission into the film by local application of a solution containing the desired dopant to the film surface (by ink jet printing, screen printing, local droplet application, etc.). This overcomes difficulties encountered with the direct patterning of three separately formed organic layers (each which uniformly coats an entire surface when formed) into regions for separate R, G, and B devices due to the sensitivities of the organic materials to chemicals typically used with conventional patterning technologies.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: August 15, 2006
    Assignee: The Trustees of Princeton University
    Inventors: James C. Sturm, Thomas R. Hebner, Florian Pschenitzka
  • Patent number: 6087196
    Abstract: A method of fabricating semiconductor devices using ink-jet printing is provided to directly deposit patterned polymer films to create OLED's and other semiconductor devices. The luminescence of poly-vinylcarbazol (PVK) films, with dyes of coumarin 6 (C6), coumarin 47 (C47), and nile red was similar to that of films of the same composition deposited by spin-coating. Light emitting diodes with low turn-on voltages were also fabricated in PVK doped with C6 deposited by ink-jet printing.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: July 11, 2000
    Assignee: The Trustees of Princeton University
    Inventors: James C. Sturm, Chung Chih Wu, Duane Marcy, Thomas R. Hebner