Patents by Inventor John Altieri

John Altieri 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 a lateral bipolar transistor with dual collector, circular symmetry and composite structure
    Patent number: 5387553
    Abstract: A lateral PNP bipolar transistor includes concentric circular emitter and annular base and dual collector regions. The inner collector region is moderately doped to provide good punch-through and Early voltage performance. The outer collector region is highly doped to provide low collector series resistance. A composite transistor made up of any desired number of individual transistors provides a transistor having a desired current capacity. The transistor annular base cross-section permits very accurate base width control during the manufacturing process.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: February 7, 1995
    Assignee: International Business Machines Corporation
    Inventors: Tor W. Moksvold, John Altieri, Ching-Tzuen Tarn, Colleen M. Snavely