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Floating gate (FG) devices using barrier-engineered (BE) tunneling dielectric have been studied both theoretically and experimentally. Through WKB modeling the tunneling efficiency of various multi-layer tunneling barriers can be well predicted. Experimental results for FG devices with oxide-nitride-oxide (ONO) U-shaped barrier are examined to validate our model. Furthermore, a large-density array...
SONOS devices using gate injection programming and erasing have better cycling endurance because the gate oxide is not stressed by P/E operations. This work studies the gate injection behavior in detail using the recently developed gate-sensing and channel-sensing (GSCS) technique. GSCS accurately locates the charge centroid during programming/erasing and reliability tests. For the first time, we...
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