Patents by Inventor Joseph I. Mantz

Joseph I. Mantz 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 fabricating index-guided semiconductor laser
    Patent number: 4990466
    Abstract: A method of altering a refractive index, as for an optical waveguide, as in a buried heterostructure laser, by inducing disordering in a region of a semiconducotr body comprises exposing a surface portion of the semiconductor body to plasma etching, coating at least a part of the surface portion with an oxide layer, heat treating the semiconductor body.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: February 5, 1991
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Chan-Long Shieh, Joseph I. Mantz, Reinhard W. H. Engelmann