Patents by Inventor Wilhelm Schellenberger

Wilhelm Schellenberger 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: 6132811
    Abstract: The invention relates to a procedure applicable for drying substrate surfaces of a large number of materials, such as semiconductors, metals, plastics and, in particular, silicon. The silicon (1) is dipped into a liquid bath (2) and the silicon (1) is separated from the liquid (3), the liquid of the bath (2) consisting of an aqueous HF solution (3) with a concentration between 0.001 and 50%. By removing the silicon from the bath at a speed of between 0.1 cm/sec and 20 cm/sec, the bath liquid drains from the hydrophobic surface to provide a clean, dry substrate.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: October 17, 2000
    Assignee: ICTOP Entwicklungs GmbH
    Inventors: Wilhelm Schellenberger, Dieter Herrmannsdorfer
  • Patent number: 5714203
    Abstract: The invention relates to a procedure applicable for drying substrate surfaces of a large number of materials, such as semiconductors, metals, plastics and, in particular, silicon. The silicon (1) is dipped into a liquid bath (2) and the silicon (1) is separated from the liquid (3), the liquid of the bath (2) consisting of an aqueous HF solution (3) with a concentration between 0.001 and 50%. By adding a gas mixture containing O.sub.2 /O.sub.3 immediately after the drying process is finished, the silicon surface is hydrophilized. By adding a gas mixture containing O.sub.2 /O.sub.3 during the drying process, cleaning takes place as the ozone enters the solution on the liquid surface.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: February 3, 1998
    Assignee: Ictop Entwicklungs GmbH
    Inventors: Wilhelm Schellenberger, Dieter Herrmannsdorfer