Patents by Inventor Joseph Baxter Delaney

Joseph Baxter Delaney 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).

  • Collector up heterojunction bipolar transistor
    Patent number: 5757039
    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: January 28, 1997
    Date of Patent: May 26, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: Joseph Baxter Delaney, Kirk Edwin Bracey