Patents by Inventor Alan L. Carpenter

Alan L. Carpenter 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 of making a surface emitting light emitting diode
    Patent number: 4647320
    Abstract: A light-emitting diode and corresponding method for its fabrication, in which a blocking layer is used for current confinement, and a rectangular light emission pattern is employed, to avoid anisotropic effects when material systems such as indium phosphide are used. A critical step in the method of the invention is etching an opening through the blocking layer. The opening has its sides precisely oriented at forty-five degrees with respect to the cleavage planes of the substrate, to avoid exposing any crystal planes that are anisotropic.
    Type: Grant
    Filed: May 22, 1985
    Date of Patent: March 3, 1987
    Assignee: TRW Inc.
    Inventors: Edward A. Rezek, Andre Burghard, Alan L. Carpenter