Patents by Inventor Ralf Luedemann

Ralf Luedemann 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).

  • Publication number: 20120108003
    Abstract: In various embodiments, a method for producing a solar cell is provided. In accordance with the method, through-holes may be formed in a solar cell substrate having the basic doping of a first conduction type. Furthermore, predetermined surface regions of a first surface of the solar cell substrate which include at least one portion of the through-holes may be highly doped with a second, opposite conduction type; and simultaneously or subsequently other surface regions of the first surface are lightly doped with the second conduction type. Furthermore, first and second metallic contacts may subsequently be formed in such a way that the second metallic contacts are electrically isolated from the first metallic contacts.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 3, 2012
    Applicant: SOLARWORLD INNOVATIONS GMBH
    Inventors: Bernd Bitnar, Lars Oberbeck, Ralf Luedemann