Patents by Inventor Gary J. Plessl

Gary J. Plessl 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: 4604027
    Abstract: Apparatus (11), which includes two adjacent wafer treating facilities (21 and 22), features an overhead positioning mechanism (20), the operation of which is controlled by a control module (48) to handle articles, such as semiconductor wafers (16), in a plurality of sequential plating operations. The vertical movement of a manipulator extension (46) is controlled with a relatively greater degree of precision to protect the wafers from becoming damaged. In the horizontal direction, a traveling frame (106) steadies a lead screw (59) spanning an extended distance between the two facilities (21 and 22) to support a precise movement of the manipulator extension (46) with respect to both of the facilities.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: August 5, 1986
    Assignee: AT&T Technologies, Inc.
    Inventors: Alan R. Becker, Richard A. McCorkle, Robert A. Miller, Gary J. Plessl