Patents Assigned to Roth-Technik GmbH & Co. Forschung Fur Automobil-Und Umwelttechnik
  • Oxygen sensors made of alkaline-earth-doped lanthanum ferrites
    Patent number: 5843858
    Abstract: An oxygen sensor made of alkaline-earth-doped perovskitic lanthanum ferrites with the general formula:La.sub.1-x Me.sub.x FeO.sub.3-.delta.where Me is one of the alkaline earth metals, Mg, Ca, Sr, and Ba and x is the degree of doping, and the oxygen deficit of anion .delta.=0 to 0.25. The degree of doping of the lanthanum ferrites is x=0.1 to 0.3 and resistance is measured in the lanthanum ferrites as a function of oxygen partial pressure.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: December 1, 1998
    Assignee: Roth-Technik GmbH & Co. Forschung Fur-Automobil-Und Umwelttechnik
    Inventors: Karl-Heinz Hardtl, Ulrich Schonauer, Andreas Krug
  • Electrically conducting connection
    Patent number: 5730543
    Abstract: An electrically conductive connection is made between a metal connector and a metal layer applied and bonded by sintering to a ceramic substrate comprising glass and/or vitreous ceramic in small quantities. An adhesion-promoting layer having a glass and/or vitreous ceramic and metal particles is applied and bonded by fusion to the ceramic substrate. The metal layer with the sintered bond is then applied to the ceramic substrate and the connector is welded to the metal layer by laser welding.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: March 24, 1998
    Assignee: Roth-Technik GmbH & Co. Forschung Fur Automobil-Und Umwelttechnik
    Inventors: Ulrich Schonauer, Michael Tafferner, Hagen Fischer