Patents by Inventor Jorge L. Tizol

Jorge L. Tizol 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).

  • Method for hydrogen treatment of field effect transistors for use in hermetically sealed packages
    Patent number: 5595917
    Abstract: A method for hydrogen treatment of FETs for use in hermetically sealed packages is disclosed. FETs such as GaInAs HEMTs are treated before hermetic packaging by heating them in a hydrogen atmosphere until their drain currents degrade, and then continuing to heat them until their drain currents are restored. The HEMTs' drain currents are monitored and the process is continued until the currents stabilize. Thereafter the devices' temperature is lowered to the desired operating temperature and their drain currents are measured. If the drain currents after treatment are close enough to the current levels before treatment, the devices are selected; otherwise they are rejected.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: January 21, 1997
    Assignee: Hughes Aircraft Company
    Inventors: Michael J. Delaney, Loi D. Nguyen, Minh V. Le, Jorge L. Tizol, James C. Loh