Patents by Inventor David K. Bernhardt

David K. Bernhardt 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: 7924159
    Abstract: The present invention involves a system and method of remotely detecting the presence of a wafer comprising, a passive RFID circuit, wherein the RFID circuit is attached to an end of a transfer arm located inside a vacuum chamber of an ion implantation system, a reader located outside the vacuum chamber, and wherein the RFID tag provides an indication relating to whether or not a wafer is secured by the transfer arm.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: April 12, 2011
    Assignee: Axcelis Technologies Inc.
    Inventors: Kan Ota, Michael Chen, David K. Bernhardt
  • Publication number: 20090189766
    Abstract: The present invention involves a system and method of remotely detecting the presence of a wafer comprising, a passive RFID circuit, wherein the RFID circuit is attached to an end of a transfer arm located inside a vacuum chamber of an ion implantation system, a reader located outside the vacuum chamber, and wherein the RFID tag provides an indication relating to whether or not a wafer is secured by the transfer arm.
    Type: Application
    Filed: January 30, 2008
    Publication date: July 30, 2009
    Applicant: Axcelis Technologies, Inc.
    Inventors: Kan Ota, Michael Chen, David K. Bernhardt
  • Patent number: 7402821
    Abstract: An improved HE LINAC-based ion implantation system is disclosed utilizing direct digital synthesis (DDS) techniques to obtain precise frequency and phase control and automated electrode voltage phase calibration. The DDS controller may be used on a multi-stage linear accelerator based implanter to digitally synchronize the frequency and phase of the electric fields to each electrode within each stage of the accelerator. The DDS controller includes digital phase synthesis (DPS) circuits for modulating the phase of the electric field to the electrodes, and a master oscillator that uses digital frequency synthesis or DFS to digitally synthesize a master frequency and phase applied to each of the DPS circuits. Also disclosed are methods for automatically phase and amplitude calibrating the RF electrode voltages of the stages.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: July 22, 2008
    Assignee: Axcelis Technologies, Inc.
    Inventor: David K. Bernhardt
  • Patent number: 7321299
    Abstract: Method and apparatus for use in setting up workpiece treatment or processing equipment. A disclosed system processes silicon wafers that are treated during processing steps in producing semiconductor integrated circuits. The processing equipment includes a wafer support that supports a wafer in a treatment region during wafer processing. A housing provides a controlled environment within the housing interior for processing the wafer on the wafer support. A mechanical transfer system transports wafers to and from the support. A wafer simulator is used to simulate wafer movement and includes a pressure sensor for monitoring contact between the simulator and the wafer transfer and support equipment. In one illustrated embodiment the wafer simulator is generally circular and includes three equally spaced pressure sensors for monitoring contact with wafer transport and support equipment.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: January 22, 2008
    Assignee: Axcelis Technologies, Inc.
    Inventors: Kevin R. Verrier, David K. Bernhardt, Jerry F. Negrotti, Donald N. Polner