Patents by Inventor Donna R. Fitzpatrick

Donna R. Fitzpatrick 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).

  • Selective removal of material by irradiation
    Patent number: 5643472
    Abstract: An apparatus and method for selectively removing undesired material from the surface of a substrate provides a flow of inert gas over the undesired material substrate surface while irradiating the undesired material with energetic photons. The invention enables removal of undesired material without altering the physical properties of the material underlying or adjacent the removed, undesired material. The invention can be applied to produce changes in surface topography (including nano-structuring and surface planarization).
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: July 1, 1997
    Assignee: Cauldron Limited Partnership
    Inventors: Audrey C. Engelsberg, Donna R. Fitzpatrick