Patents by Inventor Kulwant Egan

Kulwant Egan 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).

  • Fabrication process employing special masks for the manufacture of high speed bipolar analog integrated circuits
    Patent number: 4648909
    Abstract: A fabrication process for integrated circuits having linear bipolar transistors and other circuit elements. The process defines collector contact 32, base 34, and isolation 36 regions in one masking operation. Subsequent masking layers of photoresist 40, 42, 46 are used to shield selected regions during implantation of exposed regions. Circuit density is improved through the use of aluminum doped isolation regions 36. The base region is doped in a single ion implantation step, which is followed by low temperature deposition of a covering oxide layer 48.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: March 10, 1987
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Surinder Krishna, Kulwant Egan