Patents by Inventor Victor E. Henrich

Victor E. Henrich 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 of making secondary-electron emitters
    Patent number: 4115228
    Abstract: Thick, finely-grained films of cermets are fabricated using conventional techniques of sputtering the ceramic and the metal onto a substrate. The cermet is then subjected to differential sputtering in which the metal is sputtered away faster than the ceramic to leave a ceramic-rich surface layer having excellent secondary-electron-emission properties for low-energy incident electrons. Typical of such cermets are MgO/Au, MgO/Pt and MgO/Ag. The presence of metallic particles in the bulk of the films and the small size of the ceramic particles greatly reduce surface charging while allowing the emitter film to be made thick enough to have a long operating life under adverse device conditions.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: September 19, 1978
    Assignee: Massachusetts Institute of Technology
    Inventors: Victor E. Henrich, John C. C. Fan
  • Material and method of making secondary-electron emitters
    Patent number: 4038216
    Abstract: Thick, finely-grained films of cermets are fabricated using conventional techniques of sputtering the ceramic and the metal onto a substrate. The cermet is then subjected to differential sputtering in which the metal is sputtered away faster than the ceramic to leave a ceramic-rich surface layer having excellent secondary-electron-emission properties for low-energy incident electrons. Typical of such cermets are MgO/Au, MgO/Pt and MgO/Ag. The presence of metallic particles in the bulk of the films and the small size of the ceramic particles greatly reduce surface charging while allowing the emitter film to be made thick enough to have a long operating life under adverse device conditions.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: July 26, 1977
    Assignee: Massachusetts Institute of Technology
    Inventors: Victor E. Henrich, John C. C. Fan