Patents by Inventor Suhas S. Wagal

Suhas S. Wagal 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: 4987007
    Abstract: A method and apparatus is provided which produces a layer of material on a substrate by extracting ions from a laser ablation plume in a vacuum environment. In a basic embodiment, the apparatus includes a vacuum chamber containing a target material and a laser focused on the target to ablate the material and ionize a portion of the ablation plume. An accelerating grid within the vacuum chamber is charged to extract the ions from the plume and direct the ions onto a substrate to grow the layer. The basic embodiment has produced diamond-like carbon films on a clean, unseeded silicon substrate at deposition rates approaching 20 microns per hour. The diamond-like carbon films produced were of exceptional quality: uniform thickness with a surface roughness about 1 Angstrom; uniform index of refraction within the range of 1.5-2.5; resistivity greater than 40 megs ohms per centimeter; and a hard surface resistant to physical abuse.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: January 22, 1991
    Assignee: Board of Regents, The University of Texas System
    Inventors: Suhas S. Wagal, Carl B. Collins