Patents by Inventor Digby F. Williams

Digby F. Williams 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).

  • Method and apparatus for depositing conducting oxide on a substrate
    Patent number: 4428810
    Abstract: There is described a method and an apparatus for depositing oxide, such as zinc oxide, on a substrate by R.F. magnetron sputtering. The oxide deposit is "switched" from a non-conducting to a highly conducting material by a second discharge caused by a voltage applied to a screen grid immediately in front of the substrate, or is rendered conducting by a heating step.
    Type: Grant
    Filed: May 12, 1982
    Date of Patent: January 31, 1984
    Assignee: Canadian Patents and Development Limited
    Inventors: James B. Webb, Digby F. Williams, Margaret A. Buchanan