Patents by Inventor Sean Zumwalt

Sean Zumwalt 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: 9869696
    Abstract: Using a local-potential-driving probe drives a conductor to a known potential while adjacent lines are grounded through the sample body reduces electrostatic scanning microscope signal from adjacent lines, allows imaging of metal lines deeper in the sample. Providing different potentials locally on different conductive lines using multiple local-potential-driving probes allows different conductors to be highlighted in the same image, for example, by changing the phase of the signal being applied to the different local-potential-driving probes.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: January 16, 2018
    Assignee: FEI EFA, INC.
    Inventors: Andrew Norman Erickson, Stephen Bradley Ippolito, Sean Zumwalt
  • Publication number: 20170003336
    Abstract: Milling using a scanning probe microscope with a diamond tip removes a layer of material and produces a surface that is sufficiently smooth that it can be probed using a nanoprober to provide site-specific sample preparation and delayering. Diamond milling provides in situ, localized, precision delayering inside of a nanoprobing tool, thereby decreasing the turnaround time for integrated circuit analysis. Furthermore, unlike focused ion beam delayering, the diamond tip should not alter the electrical characteristics of the integrated circuit.
    Type: Application
    Filed: June 14, 2016
    Publication date: January 5, 2017
    Applicant: DCG Systems, Inc.
    Inventors: Stephen Ippolito, Sean Zumwalt, Andrew Norman Erickson
  • Publication number: 20160231353
    Abstract: Using a local-potential-driving probe drives a conductor to a known potential while adjacent lines are grounded through the sample body reduces electrostatic scanning microscope signal from adjacent lines, allows imaging of metal lines deeper in the sample. Providing different potentials locally on different conductive lines using multiple local-potential-driving probes allows different conductors to be highlighted in the same image, for example, by changing the phase of the signal being applied to the different local-potential-driving probes.
    Type: Application
    Filed: February 3, 2016
    Publication date: August 11, 2016
    Applicant: DCG Systems, Inc.
    Inventors: Andrew Norman Erickson, Stephen Bradley Ippolito, Sean Zumwalt