Patents by Inventor Neal Mellen

Neal Mellen 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).

  • Modulation doped field effect transistor
    Patent number: 5399887
    Abstract: A modulation doped field effect transistor (10) is formed to have a drain (28, 12, 11) that is vertically displaced from the source (16, 17) and channel (20, 21) regions. The transistor (10) has the source (16, 17), channel (20, 21) and a portion of the drain (28) arranged laterally so that current (27) flows from the source (16, 17) laterally to the drain (28, 12, 11). A heterojunction layer (18) on the channel region (20, 21) facilitates forming a two dimensional electron gas in the channel (20, 21) region which provides the transistor (10) with a high transconductance.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: March 21, 1995
    Assignee: Motorola, Inc.
    Inventors: Charles E. Weitzel, Neal Mellen, Kenneth L. Davis, Paige Holm