Patents by Inventor Steven Douglas Germain

Steven Douglas Germain 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: 5793192
    Abstract: A method for clamping a wafer to an electrostatic chuck having a substantially resistive dielectric layer disposed thereon. The method includes the step of providing a build-up voltage having a first polarity to a pole of the electrostatic chuck to cause a potential difference to build up between a first region of the substantially resistive dielectric layer and a second region of the wafer that overlies at least a portion of the first region. This potential difference gives rise to a clamping force to clamp the wafer to the electrostatic chuck. The method further includes the step of terminating the build-up voltage when the clamping force substantially reaches a predefined level. There is further included the step of providing a holding voltage to the pole of the electrostatic chuck to substantially maintain the clamping force at the predefined level. This holding voltage has the first polarity and a magnitude that is lower than a magnitude of the build-up voltage.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: August 11, 1998
    Assignee: Lam Research Corporation
    Inventors: Marc B. Kubly, Neil Martin Paul Benjamin, Steven Douglas Germain