Patents by Inventor Willi Hafner

Willi Hafner 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).

  • Process and device for the wave or vapor-phase soldering of electronic units
    Patent number: 6116497
    Abstract: A method of and an apparatus for vapor phase/solder wave soldering contacts of electronic components including temperature sensitive portions in wh the components while moving through a soldering chamber are only partially immersed in a saturated vapor whereas the contacts are wholly immersed in the vapor. A solder wave having a crest substantially coinciding with the components to be soldered is provided within the saturated vapor and a layer of an inert gas is provided above the vapor ceiling.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: September 12, 2000
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Wolfgang Scheel, Karl Ring, Willi Hafner, Helmut Leicht