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