Patents by Inventor William John Patrick

William John Patrick 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).

  • Control of oxygen in silicon crystals
    Patent number: 4040895
    Abstract: The seed to tail oxygen concentration gradient in silicon crystals, which are drawn from a silicon melt contained in a silica vessel according to the Czochralski process, is controlled by a process employing stop-go crucible rotation to provide fluid shearing at the melt-crucible interface.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: August 9, 1977
    Assignee: International Business Machines Corporation
    Inventors: William John Patrick, Wolfgang Alfred Westdorp
  • Controlling the oxygen content of Czochralski process of silicon crystals by sandblasting silica vessel
    Patent number: 4010064
    Abstract: The oxygen content of silicon crystals, which are drawn from a silicon melt contained in a silica vessel according to the Czochralski process, is controlled by changing the surface characteristics of the portion of the silica vessel which is in contact with the melt so as to provide an increased oxygen concentration in the melt during the crystal drawing process.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: March 1, 1977
    Assignee: International Business Machines Corporation
    Inventors: William John Patrick, Salvatore James Scilla, Wolfgang Alfred Westdorp