Patents by Inventor Sergio Pellegrino

Sergio Pellegrino 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).

  • Process to manufacture laser structures with lateral confinement at very low threshold current and relevant laser devices so obtained
    Patent number: 5151914
    Abstract: A process for producing a multilayer device which emits coherent luminous radiation (laser radiation) upon the application of electric power. The device consists of a substrate, a first epitaxial layer, an active layer having a composition which emits luminous radiation of a desired wavelength, an optical and electric confinement layer, a further optical and electric confinement layer and an electric contact layered structure. To concentrate current flow through the active layer, the adjacent layer is implanted with ions of transition elements, preferably Co or Fe, which, when annealed by thermal treatment, have a high resistivity.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: September 29, 1992
    Assignee: Telettra S.p.A.
    Inventors: Fabio Vidimari, Sergio Pellegrino