Patents by Inventor Eric David Perfecto

Eric David Perfecto 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).

  • Dimensionally decoupled ball limiting metalurgy
    Patent number: 8338286
    Abstract: A method for reducing stress on under ball metallurgy (UBM) is disclosed. A collar is disposed around the ball to provide support, and prevent solder interaction in the undercut areas of the UBM. In one embodiment, the collar is comprised of photosensitive polyimide.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: December 25, 2012
    Assignee: International Business Machines Corporation
    Inventors: Eric David Perfecto, Harry David Cox, Timothy Harrison Daubenspeck, David L. Questad, Brian Richard Sundlof