Patents by Inventor David P. Norwood

David P. Norwood 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).

  • Process for obtaining multiple sheet resistances for thin film hybrid microcircuit resistors
    Patent number: 4801469
    Abstract: A standard thin film circuit containing Ta.sub.2 N (100 ohms/square) resirs is fabricated by depositing on a dielectric substrate successive layers of Ta.sub.2 N, Ti and Pd, with a gold layer to provide conductors. The addition of a few simple photoprocessing steps to the standeard TFN manufacturing process enables the formation of Ta.sub.2 N+Ti (10 ohms/square) and Ta.sub.2 N+Ti+Pd (1 ohm/square) resistors in the same otherwise standard thin film circuit structure.
    Type: Grant
    Filed: August 7, 1986
    Date of Patent: January 31, 1989
    Assignee: The United States of America as represented by the Department of Energy
    Inventor: David P. Norwood