Patents by Inventor Philippe Bouard

Philippe Bouard 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).

  • Emitter finger structure in a switching transistor
    Patent number: 4609414
    Abstract: A particular emitter finger structure in an NPN type switching transistor. The emitter zone is divided into two lateral N type strips. In the central part are provided, on the one hand, a diffusion of N type dopants whose junction depth is small and, on the other hand, a gold diffusion substantially of the same depth as that of the junction depth of said lateral zones. Thus, any possibility of injection at the center of the emitter finger is removed, which allows higher speed transistors to be obtained.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: September 2, 1986
    Assignee: Thomson-CSF
    Inventor: Philippe Bouard