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