Patents by Inventor Lawrence B. Robinson

Lawrence B. Robinson 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).

  • Method for growing thin epitaxial layers of a non-linear, optically active material
    Patent number: 4001076
    Abstract: Thin film epitaxial layers of mixed oxide compounds, or of solid solutions of two mixed oxides, are deposited on a suitable single crystal substrate. Growth is achieved by introducing the substrate into a crucible containing a saturated solution of the oxide(s) in a molten alkali metal halide having additional undissolved oxide(s) present in the crucible. Evaporation of the alkali metal halide solvent produces and/or maintains the supersaturated condition, which is relieved by epitaxial deposition of the oxide(s) onto the substrate. When two mixed oxides are dissolved in the solvent, the composition of the film is determined and fixed by the temperature of growth. To produce a thin film of a constant composition, growth is conducted isothermally. To produce a thin film with a graded composition throughout its thickness, growth is conducted by slowly cooling the temperature of the solution.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: January 4, 1977
    Assignee: GTE Laboratories Incorporated
    Inventors: Lawrence B. Robinson, William Powazinik