{TAIL ~ The doped regions} can be formed by implanting {HEAD ~ first type dopants} into the substrate 
{ TAIL ~ The doped regions } can be formed by implanting { HEAD ~ first type dopants } into the substrate
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH