Patents by Inventor Ulrich Schwabe, deceased

Ulrich Schwabe, deceased 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: 4740479
    Abstract: Cross-couplings between n-channel and p-channel CMOS field effect transistors of static write-read memories (SRAMs) with buried contacts to the n.sup.+ and p.sup.+ regions in the substrate are obtained in accordance with known method steps and with a high packing density. A gate level thereof formed of a polycide double layer is used as an additional wiring level for the cross-coupling. The formation of the gate level occurs after the opening of regions for the buried contacts. A doping occurs simultaneously with the generation of source/drain regions of the n-channel and p-channel transistors by masked ion implantation and a subsequent high-temperature treatment. Accordingly, simple, mask-non-intensive method steps result which are especially useful in the manufacture of 6-transistor SRAMs.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: April 26, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz Neppl, Konrad Hieber, Ulrich Schwabe, deceased