Patents by Inventor Christian Pietzker

Christian Pietzker 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).

  • Method for producing a chalcogenide-semiconductor layer of the ABCtype with optical process monitoring
    Patent number: 7807494
    Abstract: A method of monitoring the chalcogenation process in which the chalcogenide semiconductor layer is produced by initially sequentially depositing the two precursor layers of elements A and B and thereafter carrying out a chalcogenizing process with a simultaneous optical process control in which the layer sequence A B is irradiated by light from at least one coherent light source, the light diffusely scattered at the surface is detected and the scattered light signal measured as a function of time is evaluated such that characteristic changes in the layer developing during the chalcogenation are assigned to four characteristic points of the scattered light signal curve.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: October 5, 2010
    Assignee: Hahn-Meitner-Institut Berlin GmbH
    Inventors: Roland Scheer, Christian Pietzker
  • Method for producing a chalcogenide-semiconductor layer of the abc2 type with optical process monitoring
    Publication number: 20040115938
    Abstract: The object of the invention is to provide a method of monitoring the chalcogenation process and, in doing so, to enable this process to be controlled and to determine its terminal point.
    Type: Application
    Filed: October 8, 2003
    Publication date: June 17, 2004
    Inventors: Roland Scheer, Christian Pietzker