Patents by Inventor Ramesh M. Sirsi

Ramesh M. Sirsi 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 of fabricating lateral PNP transistors utilizing selective diffusion and counter doping
    Patent number: 4283236
    Abstract: A lateral PNP transistor is formed by diffusing N type inpurities into an N type layer to form base contact region and base region, diffusing P type impurities into the N base region and N layer to form emitter and collector regions respectively, and counter doping the layer area between the N base region and the collector region. The counter doping is performed through a non-critical mask aperture extending between the emitter and collector regions.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: August 11, 1981
    Assignee: Harris Corporation
    Inventor: Ramesh M. Sirsi