Patents by Inventor Mathias Metzner

Mathias Metzner 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).

  • Solder paste for fastening semiconductors onto ceramic bases
    Patent number: 4962066
    Abstract: A solder paste for fastening semiconductors onto ceramic bases in a temperature range below 380.degree. C., consisting essentially of (1) 75 to 90% by weight of a mixture of silver powder and a low-melting glass powder with the weight ratio of silver to glass being between 2:1 and 9:1 and (2) 10 to 25% by weight of an organic solvent which contains 1 to 10% by weight of a thermally readily decomposable resin, the glass powder consisting essentially of 75 to 85% by weight lead oxide, 8 to 15% by weight boron oxide, 0.5 to 10% by weight silver (I) oxide 0.5 to 10% by weight bismuth (III) oxide, 0 to 5% by weight silicon dioxide, 0 to 2% by weight aluminum oxide 0 to 2% by weight tin oxide, 0 to 2% by weight zinc oxide, the glass powder having a glass transition temperature (Tg) of 250.degree. to 300.degree. C.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: October 9, 1990
    Assignee: Degussa Aktiengesellschaft
    Inventors: Karl-Anton Starz, Mathias Metzner, Wolfgang Weber