Patents by Inventor Brian Anthony Novak

Brian Anthony Novak 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).

  • Heterojunction bipolar transistor with improved current gain
    Patent number: 7397062
    Abstract: One aspect of the present invention is directed to a heterojunction bipolar transistor (HBT) comprising: a substrate; a buffer layer of undoped semiconductor material; a sub-collector layer; a collector layer; a base layer; an emitter layer; a emitter cap layer; and a contact layer; wherein a planar doping sheet is included between the substrate layer and the collector layer; and a collector electrode in electrical connection to said collector layer; a base electrode in electrical connection with said base layer; and an emitter electrode provided in electrical connection to said emitter layer.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: July 8, 2008
    Assignee: Sumika Electronic Materials, Inc.
    Inventors: Kenneth Lee Campman, Brian Anthony Novak