Patents by Inventor Jack R. Franco

Jack R. Franco 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: 4004044
    Abstract: A lift-off method for use in depositing thin films in the fabrication of integrated circuits which avoids edge tearing of the films. The method involves depositing an organic polymeric first masking material on a substrate, and forming on said material a layer of a polydimethylsiloxane resin material. The material, in turn, is covered by a second masking layer, preferably an organic polymeric resist material into which openings are placed in a selected pattern utilizing lithographic techniques. Then, conforming openings are placed in the underlying polydimethylsiloxane resin material and the openings are extended through the underlying resist material by successive reactive sputter etching steps to expose the substrate surface in the aforesaid selected pattern. The thin film to be deposited is then applied over the resulting structure; it is, thereby, deposited on the substrate in said openings.
    Type: Grant
    Filed: May 9, 1975
    Date of Patent: January 18, 1977
    Assignee: International Business Machines Corporation
    Inventors: Jack R. Franco, Janos Havas, Lewis J. Rompala