Patents by Inventor James T. C. Yeh

James T. C. Yeh 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: 5302266
    Abstract: An electron cyclotron resonance plasma heating apparatus system and process in which microwave energy is transmitted directly in an axial direction through an evacuated chamber to generate energetic electrons. These energetic electrons spiral around the magnetic field lines formed by the solenoid and spiral substantially parallel to the axis. A metal atom vapor source transmits the metal atom vapor into the chamber through a housing port in the chamber wall. The metal atom vapor source in the housing is out of the line of sight of the substrate. The metal atoms are ionized by the energized electrons, and these ionized metal atoms are confined to the plasma column substantially free of neutral atoms as such ionized metal approaches and contacts the substrate in said evacuated chamber. In this way, the ionized metal atoms substantially avoid contact with the wall of chamber. A sputter target of a second metal may be placed in the plane of the substrate and a bias voltage applied to the target.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: April 12, 1994
    Assignee: International Business Machines Corporation
    Inventors: Henry J. Grabarz, Alfred Grill, William M. Holber, Joseph S. Logan, James T. C. Yeh
  • Patent number: 4744833
    Abstract: An apparatus and method for electrostatic removal of micron and sub-micron sized contaminant particles is disclosed herein. The apparatus and method comprise creating a potential difference with a megavolt/cm electrostatic field between two conducting bases in a predetermined geometrical relation to each other. An insulator (e.g. a dielectric film) is maintained at or near contact between one of the bases and the surface to be cleaned to electrostatically remove particles from said surface. The bases can be made to move relative to each other and the surface to be cleaned.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: May 17, 1988
    Assignee: International Business Machines Corporation
    Inventors: Douglas W. Cooper, Henry L. Wolfe, James T. C. Yeh