For some embodiments, the tunnel dielectric layer may adjoin {TAIL ~ the substrate} in at least a portion of {HEAD ~ the channel region} 
For some embodiments , the tunnel dielectric layer may adjoin { TAIL ~ the substrate } in at least a portion of { HEAD ~ the channel region }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD