Patents by Inventor Wolfram Wettling

Wolfram Wettling 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).

  • Solar cell having an emitter provided with a surface texture and a process for the fabrication thereof
    Patent number: 6147297
    Abstract: Disclosed is a process for fabricating a solar cell as well as the solar cell itself having a grid-shaped surface texture provided with a n-doped emitter layer provided on a base material.The invention is distinguished by the fact that the base material is first covered full-surface with a n.sup.++ doping layer in the course of diffusion doping followed by a selective etching procedure on the emitter layer using a mask which produces the surface texture in such a manner that a multiplicity of crisscrossing rows of pointed ribs is created whose top section is composed of the n.sup.++ doped doping layer and bottom section of the base material.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: November 14, 2000
    Assignee: Fraunhofer Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Wolfram Wettling, Stefan Glunz