Patents by Inventor Otwin Breitenstein

Otwin Breitenstein 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 the production of multi-crystalline semiconductor material
    Patent number: 6506250
    Abstract: A method for producing a multi-crystalline semiconductor material by crystallization from a melt of a base material in which vibration energy in the sonic or ultrasonic range is acoustically coupled by a gaseous transmission medium into the solidifying or cooling material during solidification of the melt and/or during subsequent further cooling. The parameters of this vibration energy are harmonized with the parameters of the melt and the cooling time in such a manner that the dislocation energy in the cooled multi-crystalline material is considerably lower than where there is no vibration energy coupling during the cooling time.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: January 14, 2003
    Assignees: Max-Planck Gesellschaft zur Forderung der Wissenschaften e.V., Access e.V.
    Inventors: Otwin Breitenstein, Dieter Franke
  • Silicon with structured oxygen doping, its production and use
    Patent number: 6294726
    Abstract: The present invention relates to silicon with a high oxygen content and, at the same time, a high density of crystal lattice dislocations, and to its production. This silicon may be used in photovoltaics. Solar cells which are based on the material according to the invention exhibit high levels of efficiency despite the high oxygen content.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: September 25, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Hässler, Hans-Ulrich Höfs, Wolfgang Koch, Siegfried Thurm, Otwin Breitenstein