Patents by Inventor Alan G. Solheim

Alan G. Solheim 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).

  • Interconnect method for semiconductor devices
    Patent number: 5107321
    Abstract: A BiCMOS device is revealed. The BiCMOS device achieves improved performance through the use of wrap-around silicide contacts, improved MOS gate formation, the use of n- and p-type LDD's, the formation of very shallow base regions in bipolar transistors, and through separate implants for base regions of the bipolar transistors and source/drains of the MOSFETS.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: April 21, 1992
    Assignee: National Semiconductor Corporation
    Inventors: Vida Ilderem, Alan G. Solheim, Rick C. Jerome
  • Self-aligned collector implant for bipolar transistors
    Patent number: 5071778
    Abstract: An improved method of forming bipolar devices and an improved bipolar device. The method provides for formation of an emitter contact on the base of a bipolar transistor followed by a collector implant. The collector implant varies the doping profile of the collector under the emitter contact but not adjacent the emitter contact, providing improved device characteristics. The collector implant penetrates the base of the transistor, preferably having a range deeper than the thickness of the single-poly contact layer.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: December 10, 1991
    Assignee: National Semiconductor Corporation
    Inventor: Alan G. Solheim