Patents by Inventor Debora L. Green

Debora L. Green 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).

  • Structure and method in an HBT for an emitter ballast resistor with improved characteristics
    Patent number: 6768140
    Abstract: According to one exemplary embodiment, a heterojunction bipolar transistor comprises an emitter. The heterojunction bipolar transistor further comprises a first emitter cap comprising a first high-doped layer, a low-doped layer, and a second high-doped layer, where the first high-doped layer is situated on the emitter, the low-doped layer is situated on the first high-doped layer, and the second high-doped layer is situated on the low-doped layer. The first high-doped layer, the low-doped layer, and the second high-doped layer form an emitter ballast resistor. According to this exemplary embodiment, the low-doped layer has a thickness and a dopant concentration level such that the resistance of the low-doped layer is substantially independent of the dopant concentration level, but corresponds to the thickness of the low-doped layer.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: July 27, 2004
    Assignee: Skyworks Solutions, Inc.
    Inventors: Kyushik Hong, Richard S. Burton, Noureddine Matine, Debora L. Green, Charles F. Krumm