Patents by Inventor John F. Grant

John F. Grant 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 to operate GEF4 gas in hot cathode discharge ion sources
    Patent number: 6215125
    Abstract: The present invention provides a method of extending, i.e. prolonging, the operating lifetime of hot cathode discharge ion source by utilizing and introducing a nitrogen-containing co-bleed gas into an ion implantation apparatus which contains at least a hot cathode discharge ion source and an ion implantation gas such as GeF4.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: April 10, 2001
    Assignee: International Business Machines Corporation
    Inventors: Jiong Chen, Brian S. Freer, John F. Grant, Lawrence T. Jacobs, Joseph L. Malenfant, Jr.