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