Patents by Inventor Srinath Ramswamy

Srinath Ramswamy 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).

  • Publication number: 20190019545
    Abstract: Read-only (“RO”) data consisting of a physically unclonable function (“PUF”) pattern is written to a ferroelectric random-access memory (“FRAM”) memory array. The FRAM array is baked to imprint the PUF pattern with a selected average depth of imprint and a corresponding average read reliability. The average depth of imprint and corresponding average read reliability are determined during testing after baking. The PUF pattern as read after baking is compared to the PUF pattern as written prior to baking. Additional PUF pattern writing and baking cycles may be performed until the average depth of imprint and associated read reliability reach a first selected level. Integrated circuits determined to be over-imprinted by exceeding a second selected level may be rejected. The first and second levels of PUF pattern imprint are selected such as to produce FRAM arrays with a unique fingerprint for each individual FRAM array-containing integrated circuit.
    Type: Application
    Filed: August 31, 2018
    Publication date: January 17, 2019
    Inventors: Chiraag Juvekar, Joyce Kwong, Clive Bittlestone, Srinath Ramswamy