Patents by Inventor Richard P. Notley

Richard P. Notley 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).

  • Power semiconductor device having over voltage protection
    Patent number: 5324971
    Abstract: A semiconductor body (2) has adjacent a first major surface (3) a first region (5) of one conductivity type part of which defines an active device area (6) of a power semiconductor device (7) having at least two electrodes (8 and 9 or 8 and 10) and active device regions (11) each forming with the first region (5) a pn junction (11a) extending to the first major surface (3). A protection device (12) formed by a series-connected array of semiconductor rectifying elements (13) is provided on an insulating layer (14) on the first major surface (3). The protection device (12) is connected between at least two electrodes (8 and 9 or 10) of the power semiconductor device (7) so as to break down to cause conduction between the two electrodes when the voltage across the protection device (12) exceeds a predetermined limit.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: June 28, 1994
    Assignee: U.S. Philips Corporation
    Inventor: Richard P. Notley