Patents by Inventor Thomas W. Aswad

Thomas W. Aswad 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: 6578287
    Abstract: A method and apparatus is disclosed for staging or cooling a substrate between high temperature thermal processing steps. In the disclosed embodiment, one or more cooling stations are located off-line within a wafer handling chamber, outside the thermal processing chamber. After thermal processing, a hot wafer can be loaded on to one station, where the wafer is subjected to forced convection cooling. In particular, the wafer is subjected to cooling gas from above and below through perforated upper and lower showerhead assemblies. The wafer can thus be cooled rapidly on a station while other wafers are transferred into and out of the processing chamber. Desirably, the wafer is cooled on the station to a point at which it can be handled by a low temperature wafer handler and stored in a low temperature cassette.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: June 17, 2003
    Assignee: ASM America, Inc.
    Inventor: Thomas W. Aswad
  • Publication number: 20020112368
    Abstract: A method and apparatus is disclosed for staging or cooling a substrate between high temperature thermal processing steps. In the disclosed embodiment, one or more cooling stations are located off-line within a wafer handling chamber, outside the thermal processing chamber. After thermal processing, a hot wafer can be loaded on to one station, where the wafer is subjected to forced convection cooling. In particular, the wafer is subjected to cooling gas from above and below through perforated upper and lower showerhead assemblies. The wafer can thus be cooled rapidly on a station while other wafers are transferred into and out of the processing chamber. Desirably, the wafer is cooled on the station to a point at which it can be handled by a low temperature wafer handler and stored in a low temperature cassette.
    Type: Application
    Filed: April 24, 2002
    Publication date: August 22, 2002
    Inventor: Thomas W. Aswad
  • Patent number: 6408537
    Abstract: A method and apparatus is disclosed for staging or cooling a substrate between high temperature thermal processing steps. In the disclosed embodiment, one or more cooling stations are located off-line within a wafer handling chamber, outside the thermal processing chamber. After thermal processing, a hot wafer can be loaded on to one station, where the wafer is subjected to forced convection cooling. In particular, the wafer is subjected to cooling gas from above and below through perforated upper and lower showerhead assemblies. The wafer can thus be cooled rapidly on a station while other wafers are transferred into and out of the processing chamber, Desirably, the wafer is cooled on the station to a point at which it can be handled by a low temperature wafer handler and stored in a low temperature cassette.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: June 25, 2002
    Assignee: ASM America, Inc.
    Inventor: Thomas W. Aswad
  • Patent number: 6073366
    Abstract: A method and apparatus is disclosed for cooling a substrate between high temperature thermal processing steps. In the disclosed embodiment, one or more cooling stations are located off-line within a wafer handling chamber, just outside the thermal processing chamber. After thermal processing, a hot wafer can be loaded on to the cooling station, where the wafer is subjected to forced convection cooling. In particular, the wafer is subjected to cooling gas from above and below through perforated upper and lower shower head assemblies. The wafer can thus be cooled rapidly on a cooling station while other wafers are transferred into and out of the processing chamber. Desirably, the wafer is cooled on the cooling station to a point at which it can be handled by a low temperature wafer handler and stored in a low temperature cassette.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: June 13, 2000
    Assignee: ASM America, Inc.
    Inventor: Thomas W. Aswad