Also, because of the energy difference 413 that exists between the highest filled electron energy state 412 1 and the Fermi level Ef, {TAIL ~ electrons} cannot tunnel from {HEAD ~ the quantum dot} 405 into the control gate 408 
Also , because of the energy difference 413 that exists between the highest filled electron energy state 412 1 and the Fermi level Ef , { TAIL ~ electrons } can not tunnel from { HEAD ~ the quantum dot } 405 into the control gate 408
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH