Patents by Inventor Helmut Schoech

Helmut Schoech 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).

  • Dielectric interference filter system, LCD-display and CCD-arrangement as well as process for manufacturing a dielectric interference filter system and use of this process
    Patent number: 6342970
    Abstract: A dielectric interference filter system with at least filter elements of different spectral characteristics on the same carrier substrate is provided. The filter elements have the same height and/or adjoin each other without gaps. The system is used for, inter alia, interference color filter systems in the form of an LCD-display or CCD-arrangement. A process for manufacturing the system includes preparing at least one filter element by coating and subsequent etching, and preparing at least one subsequent filter element by coating and subsequent structuring utilizing lift-off in which the etching mask is used as the lift-off mask.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: January 29, 2002
    Assignee: Unaxis Balzers Aktiengesellschaft
    Inventors: Reinhard Sperger, Helmut Rudigier, Peter Wierer, Helmut Schoech