Patents by Inventor Ferdinand C. Duigon

Ferdinand C. Duigon 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).

  • Thin film pattern generation by an inverse self-lifting technique
    Patent number: 4181755
    Abstract: A method of pattern generating a circuit film and adjacent barrier film on a substrate. A continuous layer of circuit film is applied to the substrate surface, and a photoresist pattern is delineated on the circuit film such that the photoresist remains on the circuit film pattern area. The area of circuit film not covered by photoresist is then removed, exposing the substrate surface. While retaining the photoresist which covers the circuit film pattern, the entire substrate surface is coated with the barrier film. The remaining photoresist is then removed, causing the barrier film which covers it to lift off, thereby exposing the circuit film pattern.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: January 1, 1980
    Assignee: RCA Corporation
    Inventors: Shing-Gong Liu, Ferdinand C. Duigon