Patents by Inventor Keith H. Armstrong

Keith H. Armstrong 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: 6072163
    Abstract: Systems and methods that make it possible to rapidly cycle a workpiece through a temperature/time profile over a wide temperature range, e.g., 0.degree. C. to 350.degree. C., without having to lift and transfer the workpiece between separate baking and chilling mechanisms. The present invention is based in part upon the concept of using a low thermal mass, thermally conductive heating member to support a workpiece, such as a microelectronic device, during both baking and chilling operations. While supporting the workpiece on one surface, the other surface of the heating member can be brought into and out of thermal contact with a relatively thermally massive chill plate to easily switch between baking and chilling operations. A simple mechanism is all that is required to either physically separate the heating member and chill plate to accomplish the most rapid heating, or the simple mechanism adjoins the heating member and chill plate to accomplish the most rapid chilling.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: June 6, 2000
    Assignee: FSI International Inc.
    Inventors: Keith H. Armstrong, Kevin G. Kemp, Faqiu (Frank) Liang, Natarajan Ramanan