Patents by Inventor Richard E. Shipley

Richard E. Shipley 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).

  • Aluminum treatment to prevent hillocking
    Patent number: 3986897
    Abstract: A method of surface treating aluminum, particularly aluminum metallization for semiconductors, which includes subjecting the aluminum surface to be treated with fuming nitric acid for one to ten minutes at room temperature. Following cleaning, the surface is subjected to boiling water for 5 to 15 minutes. The foregoing treatment appears to form a boehmite (AlO(OH)) layer on the surface of the aluminum, thereby substantially eliminating hillocking.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: October 19, 1976
    Assignee: Motorola, Inc.
    Inventors: Larry D. McMillan, Richard E. Shipley