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