Patents by Inventor David Ely Eichstadt

David Ely Eichstadt 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).

  • Electrochemical etch for high tin solder bumps
    Patent number: 6468413
    Abstract: An aqueous electrochemical etchant for etching metals in the presence of one or more metals not to be etched, the etchant including glycerol in the concentration range of 1.30 to 1.70 M, a sulfate compound having a sulfate ion concentration in the range of 0 to 0.5 M, and a phosphate compound having a phosphate ion concentration in the range of 0.1 to 0.5 M.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: October 22, 2002
    Assignee: International Business Machines Corporation
    Inventors: Lisa A. Fanti, John Michael Cotte, David Ely Eichstadt