Patents by Inventor Enden David Liu

Enden David Liu 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: 9620332
    Abstract: The present application discloses methods, systems and devices for using charged particle beam tools to inspect and perform lithography on a substrate using a combination of vectoring to move a beam to features to be imaged, and raster scanning to obtain an image of the feature(s). The inventors have discovered that it is highly advantageous to use an extra step, a fast raster scan to image the substrate at a lower resolution, to determine which features receive priority for inspection; this extra step can reduce total inspection time, enhance inspection results, and improve beam alignment and manufacturing yield. Using multiple beam-producing columns, with multiple control computers local to the columns, provides various synergies. Preferably, miniature, non-magnetic, electrostatically-driven columns are used.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: April 11, 2017
    Assignee: Multibeam Corporation
    Inventors: David K. Lam, Kevin M. Monahan, Enden David Liu, Cong Tran, Theodore A. Prescop
  • Patent number: 9466463
    Abstract: The present application discloses methods, systems and devices for using charged particle beam tools to inspect and perform lithography on a substrate using a combination of vectoring to move a beam to features to be imaged, and raster scanning to obtain an image of the feature(s). The inventors have discovered that it is highly advantageous to use an extra step, a fast raster scan to image the substrate at a lower resolution, to determine which features receive priority for inspection; this extra step can reduce total inspection time, enhance inspection results, and improve beam alignment and manufacturing yield. Using multiple beam-producing columns, with multiple control computers local to the columns, provides various synergies. Preferably, miniature, non-magnetic, electrostatically-driven columns are used.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: October 11, 2016
    Assignee: Multibeam Corporation
    Inventors: David K. Lam, Kevin M. Monahan, Enden David Liu, Cong Tran, Theodore A. Prescop