A thin film transistor includes a substrate with {HEAD ~ a trench} having {TAIL ~ first and second sides} and a bottom, and a gate electrode at one of the first and second sides of the trench 
A thin film transistor includes a substrate with { HEAD ~ a trench } having { TAIL ~ first and second sides } and a bottom , and a gate electrode at one of the first and second sides of the trench
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH