In embodiments, an insulating layer is formed at {TAIL ~ a lower portion} of {HEAD ~ a channel area} 
In embodiments , an insulating layer is formed at { TAIL ~ a lower portion } of { HEAD ~ a channel area }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD