Patents by Inventor James Harry Freeman

James Harry Freeman 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).

  • Generator of ribbon-shaped ion beam
    Patent number: 5959303
    Abstract: A mass-analysed ion beam generator in which the ion beam is in the form of a thin flat ribbon with its major transverse dimension aligned parallel with the direction of the mass-analysing magnetic field.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: September 28, 1999
    Inventor: James Harry Freeman
  • Generator of ribbon-shaped ion beam
    Patent number: 5866909
    Abstract: A mass-analysed ion beam generator in which the ion beam is in the form of a thin flat ribbon with its major transverse dimension aligned parallel with the direction of the mass-analysing magnetic field.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: February 2, 1999
    Assignee: AEA Technology plc
    Inventor: James Harry Freeman
  • Ion beam separators
    Patent number: 4017403
    Abstract: In an ion beam separator for use in ion implantation, the ion beam is scanned in both X and Y directions over a target. `Y` scan is achieved by electrostatic beam deflection located close to the region where the ion beam exits from the influence of the deflecting magnet. `X` scan is preferably provided by rectilinear target movement. Beam width or intensity control is achieved using a rotatable slit. Targets are transferred sequentially across the beam from a pack on one side and are re-stacked on the other side of the beam after exposure.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: April 12, 1977
    Assignee: United Kingdom Atomic Energy Authority
    Inventor: James Harry Freeman