Patents by Inventor Eckard Quandt

Eckard Quandt 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).

  • Force sensor array having magnetostrictive magnetoresistive sensors and method for determining a force
    Patent number: 7535217
    Abstract: The invention relates to a force sensor having a layer sequence for determining a force acting on the layer sequence along a predefined force axis. The layer sequence includes, arranged successively in a vertical direction, a first magnetic layer with a first magnetization direction, a separating layer and a second magnetic layer with a second magnetization direction. Here, the first magnetization direction is secured with respect to the layer sequence. The second magnetic layer has a magnetostriction constant that is different from zero and a uniaxial magnetic anisotropy with an anisotropy axis. The uniaxial magnetic anisotropy is generated using shape anisotropy. The second magnetization direction encloses an angle of more than 0° and less than 90° with the force axis in the quiescent state, and the anisotropy axis encloses an angle of more than 0° and less than 90° with the force axis.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: May 19, 2009
    Assignee: Infineon Technologies AG
    Inventors: Eckard Quandt, Manfred Ruehrig, Stephan Schmitt, Bernhard Winkler, Joachim Wecker, Juergen Zimmer
  • Force sensor array having magnetostrictive magnetoresistive sensors and method for determining a force
    Publication number: 20060246271
    Abstract: The invention relates to a force sensor having a layer sequence for determining a force acting on the layer sequence along a predefined force axis. The layer sequence includes, arranged successively in a vertical direction, a first magnetic layer with a first magnetization direction, a separating layer and a second magnetic layer with a second magnetization direction. Here, the first magnetization direction is secured with respect to the layer sequence. The second magnetic layer has a magnetostriction constant that is different from zero and a uniaxial magnetic anisotropy with an anisotropy axis. The uniaxial magnetic anisotropy is generated using shape anisotropy. The second magnetization direction encloses an angle of more than 0° and less than 90° with the force axis in the quiescent state, and the anisotropy axis encloses an angle of more than 0° and less than 90° with the force axis.
    Type: Application
    Filed: March 7, 2006
    Publication date: November 2, 2006
    Inventors: Eckard Quandt, Manfred Ruehrig, Stephan Schmitt, Bernhard Winkler, Joachim Wecker, Juergen Zimmer