Patents by Inventor Donald Friedrich

Donald Friedrich 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).

  • Publication number: 20080085089
    Abstract: The invention relates to a wafer scale process for the manufacture of optical waveguide devices, and particularly for the manufacture of ridge waveguide devices, and the improved waveguides made thereby. The present invention has found a process for achieving sub-micron control of an optical waveguiding layer thickness by providing a dimensionally stable wafer assembly into which adhesive can be introduced without altering the planar relationship between a carrier wafer and an optically transmissive wafer in wafer scale manufacture. This process permits wafer scale manufacture of optical waveguide devices including thin optically transmissive layers. A pattern of spacer pedestals is created by a deposition and etch back, or by a surface etch process to precisely reference surface information from a master surface to a carrier wafer to a thin optically transmissive wafer. The tolerance achievable in accordance with this process provides consistent yield across the wafer.
    Type: Application
    Filed: June 27, 2007
    Publication date: April 10, 2008
    Applicant: JDS Uniphase Corporation
    Inventors: Benjamin Catching, Donald Friedrich, Charles Hulse, Marc Von Gunten, Jason Reed, Karl Kissa, Glen Drake, Julia Duncan, William Minford, Hiren Shah, Jerry Zieba, Jason Xu
  • Publication number: 20050217969
    Abstract: An automated verification system for authenticating an object having an optical security feature includes an optical system, a transport staging apparatus, and an analyzing device. The optical system includes one or more light sources that are capable of generating either narrowband or broadband light beams. The transport staging apparatus cooperates with the light sources and is configured to position the object such that one or more of the light beams strike a portion of the object where the security feature should be located. The analyzing device receives the light beams reflected or transmitted from the object and is adapted to analyze the optical characteristics of the light beams at varying angles and/or wavelengths to verify the authenticity of the object.
    Type: Application
    Filed: May 31, 2005
    Publication date: October 6, 2005
    Inventors: Paul Coombs, Donald Friedrich, Ken Cardell, Curtis Hruska, Charles Markantes