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