Patents by Inventor Alexander Kahle

Alexander Kahle 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: 4678721
    Abstract: The invention provides a magnetic recording medium comprising a substrate of a nonmagnetic material bearing a thin magnetic layer with perpendicular anistropy. The magnetic thin layer comprises alternate layers of Pd and Co. The signal-to-noise ratio upon reading the stored information is considerably improved in that the thicknesses of the individual layers of Pd are between 0.2 and 2.0 nm and that the individual layers of Co consist of at least one monolayer of Co atoms and have thicknesses which are smaller than 0.3 nm.The thin magnet layer may be manufactured, for example, by electron beam vacuum vapor deposition of the individual layers of Pd and Co.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: July 7, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Friedrich J. A. den Broeder, Henricus J. G. Draaisma, Alexander Kahle