Patents by Inventor Ralf Lüdeman

Ralf Lüdeman 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 of producing a semiconductor-metal contact through a dielectric layer
    Patent number: 6982218
    Abstract: A method of electrically contacting a semiconductor layer (13) coated with at least one dielectic layer (12) which is coated with a metal layer the metal layer (11) is applied on the dielectric layer (12) and the metal layer (11) is temporarily locally heated in a line, linear or dotted pattern by means of a source of radiation (9) in a controlled manner in such a way that a local molten mixture, is formed consisting exclusively of the metal layer (11), the dielectric layer (12) and the semiconductor layer (13) are located directly underneath the metal layer (11) and upon solidification, leads to an electrical contact between the semiconductor layer (13) and the metal layer (11).
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: January 3, 2006
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Ralf Preu, Eric Schneiderlöchner, Stefan Glunz, Ralf Lüdeman