Patents by Inventor David Tao

David Tao 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: 20050026447
    Abstract: The present invention is directed to a semiconductor thermal processing system and an apparatus for thermally cooling a semiconductor substrate. According to one aspect of the present invention, a semiconductor thermal processing system and associated apparatus and method are disclosed which provides a segmented cold plate situated within a process chamber, wherein a plurality of segments of the cold plate are operable to radially translate between an engaged position and a disengaged position, wherein a substrate holder may pass between the plurality of segments when the segments are in the disengaged position. According to another aspect, an elevator is operable to linearly translate a substrate residing on a substrate holder between a heating position proximate to a heater assembly and a cooling position proximate to the segmented cold plate.
    Type: Application
    Filed: June 29, 2004
    Publication date: February 3, 2005
    Inventors: Ali Shajii, David Tao, Mathias Koch, Douglas Brown, Hossein Zarrin
  • Patent number: 6783630
    Abstract: The present invention is directed to a semiconductor thermal processing system and an apparatus for thermally cooling a semiconductor substrate. According to one aspect of the present invention, a semiconductor thermal processing system and associated apparatus and method are disclosed which provides a segmented cold plate situated within a process chamber, wherein a plurality of segments of the cold plate are operable to radially translate between an engaged position and a disengaged position, wherein a substrate holder may pass between the plurality of segments when the segments are in the disengaged position. According to another aspect, an elevator is operable to linearly translate a substrate residing on a substrate holder between a heating position proximate to a heater assembly and a cooling position proximate to the segmented cold plate.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: August 31, 2004
    Assignee: Axcelis Technologies, Inc.
    Inventors: Ali Shajii, David Tao, Mathias Koch, Douglas Brown, Hossein Zarrin
  • Publication number: 20040053514
    Abstract: The present invention is directed to a semiconductor thermal processing system and an apparatus for thermally cooling a semiconductor substrate. According to one aspect of the present invention, a semiconductor thermal processing system and associated apparatus and method are disclosed which provides a segmented cold plate situated within a process chamber, wherein a plurality of segments of the cold plate are operable to radially translate between an engaged position and a disengaged position, wherein a substrate holder may pass between the plurality of segments when the segments are in the disengaged position. According to another aspect, an elevator is operable to linearly translate a substrate residing on a substrate holder between a heating position proximate to a heater assembly and a cooling position proximate to the segmented cold plate.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 18, 2004
    Inventors: Ali Shajii, David Tao, Mathias Koch, Douglas Brown, Hossein Zarrin
  • Publication number: 20040040508
    Abstract: The present invention is directed to a semiconductor thermal processing system and an apparatus for thermally cooling a semiconductor substrate. According to one aspect of the present invention, a semiconductor thermal processing system and associated apparatus and method are disclosed which provides a segmented cold plate situated within a process chamber, wherein a plurality of segments of the cold plate are operable to radially translate between an engaged position and a disengaged position, wherein a substrate holder may pass between the plurality of segments when the segments are in the disengaged position. According to another aspect, an elevator is operable to linearly translate a substrate residing on a substrate holder between a heating position proximate to a heater assembly and a cooling position proximate to the segmented cold plate.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 4, 2004
    Inventors: Ali Shajii, David Tao, Mathias Koch, Douglas Brown, Hossein Zarrin
  • Publication number: 20040037347
    Abstract: The present invention is directed to a pyrometer system and comprises an elevator tube. The elevator tube comprises an inner tube and an outer tube surrounding the inner tube in telescoping arrangement and extending from a top to a bottom thereof, the arrangement defining a fluid passageway therebetween. The elevator tube further comprises a port associated with the outer tube that is operable to transmit a cooling gas therethrough into the fluid passageway. A pyrometer head is coupled to the bottom of the inner tube and is operable to transmit and receive radiation through the inner tube. The system further comprises a spider collar coupled to at least one of a top of the inner tube or outer tube, and is operable to support a work piece for thermal measurement thereof.
    Type: Application
    Filed: August 22, 2002
    Publication date: February 26, 2004
    Inventors: Douglas Brown, Robert David Meadows, David Tao, Mathias Koch
  • Patent number: 6695886
    Abstract: The present invention is directed to a pyrometer system and comprises an elevator tube. The elevator tube comprises an inner tube and an outer tube surrounding the inner tube in telescoping arrangement and extending from a top to a bottom thereof, the arrangement defining a fluid passageway therebetween. The elevator tube further comprises a port associated with the outer tube that is operable to transmit a cooling gas therethrough into the fluid passageway. A pyrometer head is coupled to the bottom of the inner tube and is operable to transmit and receive radiation through the inner tube. The system further comprises a spider collar coupled to at least one of a top of the inner tube or outer tube, and is operable to support a work piece for thermal measurement thereof.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: February 24, 2004
    Assignee: Axcelis Technologies, Inc.
    Inventors: Douglas Brown, Robert David Meadows, David Tao, Mathias Koch