Patents by Inventor Carl Lewis Paulnack

Carl Lewis Paulnack 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).

  • Formation of epitaxial layers on substrate wafers utilizing an inert heat radiation ring to promote uniform heating
    Patent number: 4113547
    Abstract: A method is described for growing epitaxial layers of material on monocrystalline substrates, chiefly silicon, which are substantially free of slip dislocations. The method involves placing an encircling ring of inert, heat resistant material around the rim of the substrate and over the peripheral surface of the substrate to suppress radiation from the peripheral portion of the wafer. The generation of slip dislocations is inhibited because heat is more uniformly distributed throughout the wafer.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: September 12, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Lewis Emanuel Katz, Carl Lewis Paulnack