University System of Maryland

Other

Agisilaos A Iliadis

Young Wook Kim

William E Bentley

Reza Ghodssi

Mariana Tsacoumis Meyer

A surface acoustic wave (SAW) biofilm sensor includes a transmitting electric to acoustic wave transducer defining an upper surface and a lower surface, a receiving acoustic wave to electric transducer defining an upper surface and a lower surface, a piezoelectric film layer defining an upper surface and a lower surface, and a passivation film layer defining an upper surface and a lower surface. Portions of the lower surface of the piezoelectric film layer are disposed on the upper surface of the transmitting electric to acoustic wave transducer and on the upper surface of the receiving acoustic wave to electric transducer, and the lower surface of the passivation film layer is disposed on the upper surface of the piezoelectric film layer such that the upper surface of the passivation film layer is configured to enable contact with a biofilm.

Atomic layer deposition inverted passivated surface acoustic wave sensor for early detection of biofilm growth

An interference protection system for rejecting microwave or radio frequency interference signals is embedded into a sealed packaged chip at any port susceptible to being coupled to an interference signal such as I/O pins or antenna. The interference protection system includes a sense unit for detecting signals with amplitudes exceeding a predetermined threshold level and a protection unit including a pair of MOSFET switches connected in series and maintained in ON state during normal communication state. The switches are switched OFF once the sense unit detects the interference event. A registry unit is included for registering interference events.

System and method for protecting devices from interference signals

A light emitting field effect transistor is proposed with a new extended drain region. The extension is doped with erbium or other rare-earth atoms. The erbium provides light-emitting centers in the indirect bandgap silicon substrate to enhance the radiative process. When a drain voltage is applied to create a high enough electric, energetic electrons entering this region interact with Er to emit infrared light.

Growing community of inventors

Adelphi, MD, United States of America

Agisilaos A Iliadis