Patents by Inventor Maurice Pierrepont

Maurice Pierrepont 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).

  • Semiconductor device manufacture
    Patent number: 4028140
    Abstract: A method of directly etching an inverted-mesa semiconductor structure, wherein the mesa is first formed by shallow etching from the epitaxial layer surface and then undercut by preferentially etching the substrate more rapidly than the epitaxial layer.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: June 7, 1977
    Assignee: U.S. Philips Corporation
    Inventors: John Gilbert Summers, Maurice Pierrepont