Patents by Inventor Kirk E. Bracey

Kirk E. Bracey 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 forming collector up heterojunction bipolar transistor having insulative extrinsic emitter
    Patent number: 5631173
    Abstract: A process and structure for an improved collector-up bipolar transistor. The base is formed after the emitter is implanted to eliminate base damage during oxygen implantation typical in prior art collector-up bipolar transistors. In a preferred embodiment, an emitter layer of GaAlAs is implanted with oxygen in the extrinsic emitter region to damage the material and make it insulative. The base is epitaxially grown at low temperature to insure the emitter material remains damaged and insulative.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: May 20, 1997
    Assignee: Texas Instruments Incorporated
    Inventors: Joseph B. Delaney, Kirk E. Bracey