Patents by Inventor Dana L. Andrews

Dana L. Andrews 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: 5226632
    Abstract: A slit valve apparatus associated with an aperture in a chamber wall through which a semiconductor wafer may be passed along a transfer plane. The apparatus is characterized by a valve seat which is angled relative to the transfer plane and a door which moves linearly along an axis substantially perpendicular to the valve seat. All frictionally engaged parts of the slit valve assembly are isolated from the interior of the chamber by a bellow sleeve to reduce the formation of particles. The method is characterized by the steps of surrounding the aperture with a first seating surface defining a sealing plane which is angularly disposed with respect to the transfer plane and engaging or disengaging a second seating surface with the first seating surface by linearly moving the second seating surface in a direction perpendicular to the sealing plane.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: July 13, 1993
    Assignee: Applied Materials, Inc.
    Inventors: Avi Tepman, Dana L. Andrews
  • Patent number: 5215619
    Abstract: A magnetic field enhanced single wafer plasma etch reactor is disclosed. The features of the reactor include an electrically-controlled stepped magnetic field for providing high rate uniform etching at high pressures; temperature controlled reactor surfaces including heated anode surfaces (walls and gas manifold) and a cooled wafer supporting cathode; and a unitary wafer exchange mechanism comprising wafer lift pins which extend through the pedestal and a wafer clamp ring. The lift pins and clamp ring are moved vertically by a one-axis lift mechanism to accept the wafer from a cooperating external robot blade, clamp the wafer to the pedestal and return the wafer to the blade. The electrode cooling combines water cooling for the body of the electrode and a thermal conductivity-enhancing gas parallel-bowed interface between the wafer and electrode for keeping the wafer surface cooled despite the high power densities applied to the electrode.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: June 1, 1993
    Assignee: Applied Materials, Inc.
    Inventors: David Cheng, Dan Maydan, Sasson Somekh, Kenneth R. Stalder, Dana L. Andrews, Mei Chang, John M. White, Jerry Y. K. Wong, Vladimir J. Zeitlin, David N. Wang
  • Patent number: 4842683
    Abstract: A magnetic field enhanced single wafer plasma etch reactor is disclosed. The features of the reactor include an electrically-controlled stepped magnetic field for providing high rate uniform etching at high pressures; temperature controlled reactor surfaces including heated anode surfaces (walls and gas manifold) and a cooled wafer supporting cathode; and a unitary wafer exchange mechanism comprising wafer lift pins which extend through the pedestal and a wafer clamp ring. The lift pins and clamp ring are moved vertically by a one-axis lift mechanism to accept the wafer from a cooperating external robot blade, clamp the wafer to the pedestal and return the wafer to the blade. The electrode cooling combines water cooling for the body of the electrode and a thermal conductivity-enhancing gas parallel-bowed interface between the wafer and electrode for keeping the wafer surface cooled despite the high power densities applied to the electrode.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: June 27, 1989
    Assignee: Applied Materials, Inc.
    Inventors: David Cheng, Dan Maydan, Sasson Somekh, Kenneth R. Stalder, Dana L. Andrews, Mei Chang, John M. White, Jerry Y. K. Wong, Vladimir J. Zeitlin, David N. Wang