Patents by Inventor Yoji Takagi

Yoji Takagi 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: 20080264441
    Abstract: Methods for removing adhesive from a photomask after a pellicle has been removed from the photomask are herein disclosed. In some embodiments, after a pellicle is removed from a photomask, adhesive residue remaining on the photomask is subjected to removal by an energy source, such as an excimer laser. The excimer laser may be in close proximity to a surface of the photomask which contains the adhesive residue. In some embodiments, removal of the photomask may be followed by a physical cleaning process such as megasonic cleaning or jet nozzle cleaning to remove any residual adhesive left behind.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Inventor: YOJI TAKAGI
  • Patent number: 6676759
    Abstract: A wafer support apparatus (14) of the present invention comprises a wafer support body (22) having a support area (26) for supporting a wafer W, in an upper surface thereof; and a plurality of lift members (36), each extending from the outside of the support area to the inside of the support area of the wafer support body, having a slope surface sloping downward toward the inside, in an upper surface, and being vertically movable between a lower position and an upper position with respect to the upper surface of the wafer support body.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: January 13, 2004
    Assignee: Applied Materials, Inc.
    Inventor: Yoji Takagi
  • Publication number: 20030015141
    Abstract: The wafer supporting device of the present invention comprises a wafer support, disposed within a process chamber in a semiconductor manufacturing apparatus having respective heat sources in upper and lower portions thereof; a lift member extending from the outside of the support area of the wafer support to the inside and having an inclined upper surface; an arc-shaped lift ring for supporting the lift member; and a lift pin, adapted to vertically move through a through hole in the wafer support, having an upper end part connected to the lift ring; wherein the through hole is covered and substantially closed with the lift ring when the lift pin descends. This eliminates the unevenness in temperature distribution caused by the through hole.
    Type: Application
    Filed: December 22, 2001
    Publication date: January 23, 2003
    Inventor: Yoji Takagi