Patents by Inventor Wilhelm Seifert

Wilhelm Seifert 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).

  • Patent number: 4118257
    Abstract: A process for producing a semiconductor arrangement having elemental semiconductor units or devices monolithically integrated in a semiconductor body with the units having one or a plurality of common zones of one conductivity type with locally reduced thickness and pn-junctions between zones of different conductivity types. A groove is formed, by etching, in one major surface of the semiconductor body in the portion thereof above the region corresponding to the device which is to have the zone of reduced thickness with the depth of the groove being determined by the intended reduction in thickness of the common zone of the completed arrangement.
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: October 3, 1978
    Assignee: LICENTIA Patent-Verwaltungs-GmbH
    Inventors: Theodor Oberreuter, Rigobert Schimmer, Wilhelm Seifert