Patents by Inventor William Davis Lee

William Davis Lee 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).

  • Publication number: 20110299217
    Abstract: An electrostatic clamp is provided, having a clamping plate, wherein a clamping surface of the clamping plate is configured to contact the workpiece. A voltage applied to one or more electrodes selectively electrostatically attracts the workpiece to the clamping surface. One or more auxiliary clamping members are further provided wherein the one or more auxiliary clamping members are configured to selectively secure at least a portion of the workpiece to the clamping surface. A temperature monitoring device configured to determine a temperature of the workpiece is provided, and a controller is configured to selectively clamp the workpiece to the clamping surface via a control of the voltage to the one or more electrodes and the one or more auxiliary clamping members, based, at least in part, on the temperature of the workpiece.
    Type: Application
    Filed: June 3, 2011
    Publication date: December 8, 2011
    Applicant: Axcelis Technologies, Inc.
    Inventors: Perry J.I. Justesen, Allan D. Weed, William Davis Lee, Ashwin M. Purohit, Robert D. Rathmell, Gary M. Cook
  • Publication number: 20110297845
    Abstract: A method for warming a rotational interface in an ion implantation environment provides a scan arm configured to rotate about a first axis and an end effector coupled to the scan arm via a motor to selectively secure a workpiece. The end effector is configured to rotate about a second axis having a bearing and a seal associated with the second axis and motor. The motor is activated, and the rotation of motor is reversed after a predetermined time or when the motor faults due to a rotation the end effector about the second axis. A determination is made as to whether the rotation of the end effector about the second axis is acceptable, and the scan arm is reciprocated about the first axis when the rotation of the end effector is unacceptable, wherein inertia of the end effector causes a rotation of the end effector about the second axis.
    Type: Application
    Filed: June 1, 2011
    Publication date: December 8, 2011
    Applicant: Axcelis Technologies, Inc.
    Inventors: Kan Ota, William Davis Lee
  • Publication number: 20110299218
    Abstract: A clamping device and method is provided for securing first and second workpieces having different sizes to a clamping device and providing thermal conditioning thereto. An electrostatic clamping plate having a diameter associated with the first workpiece surrounds a central portion of the clamp. A non-electrostatic central portion provides a heater within the annulus, wherein the central portion has a diameter associated with the second workpiece. A workpiece carrier is provided, wherein the workpiece carrier is configured to hold the second workpiece above the heater, and wherein a diameter of the workpiece carrier is associated with the electrostatic clamping plate annulus. The annulus selectively electrostatically clamps the workpiece carrier or a circumferential portion of the first workpiece to its clamping surface, therein selectively maintaining a position of the first or second workpiece with respect to the annulus or non-electrostatic central portion.
    Type: Application
    Filed: June 7, 2011
    Publication date: December 8, 2011
    Applicant: Axcelis Technologies, Inc.
    Inventors: William Davis Lee, Gary M. Cook, Perry J.I. Justesen, Ashwin M. Purohit, Robert D. Rathmell, Allan D. Weed
  • Publication number: 20110260047
    Abstract: Methods for implanting an silaborane molecule or a selected ionized lower mass byproduct into a workpiece generally includes vaporizing and ionizing silaborane molecule in an ion source to create a plasma and produce silaborane molecules and its ionized lower mass byproducts. The ionized silaborane molecules and lower mass byproducts within the plasma are then extracted to form an ion beam. The ion beam is mass analyzed with a mass analyzer magnet to permit selected ionized silaborane molecules or selected ionized lower mass byproducts to pass therethrough and implant into a workpiece.
    Type: Application
    Filed: April 21, 2010
    Publication date: October 27, 2011
    Applicant: AXCELIS TECHNOLOGIES, INC.
    Inventor: William Davis Lee