Patents by Inventor Michael A. Gell

Michael A. Gell 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).

  • Semiconductor heterostructures with SiGe material
    Patent number: 4959694
    Abstract: A semiconductor device comprises a short-period superlattice of alternating monolayers of silicon and germanium grown on a 100 oriented SiGe substrate including 60-95% Ge. The silicon layers are M monolayers thick, and the germanium layers are N monolayers thick, where M=2(2m+1) for m.delta.0, 1 or 2 (preferably 0) and N=2(2n+1), n=1,2,3,4,5,6 etc. "Inhomogeneous" superlattices in which successive Ge layers have thicknesses N1, N2, N3 etc. (selected from the above N values) are disclosed.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: September 25, 1990
    Assignee: British Telecommunications public limited company
    Inventor: Michael A. Gell