{HEAD ~ Trenches} separated by portions of the body are then formed in {TAIL ~ the active areas} in which transistors are to be formed 
are formed in
{ HEAD ~ Trenches } separated by portions of the body are then formed in { TAIL ~ the active areas } in which transistors are to be formed
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH