{HEAD ~ Doping} of {TAIL ~ the evaporated material} is possible by evaporating doped source material such as heavily doped silicon 
of
{ HEAD ~ Doping } of { TAIL ~ the evaporated material } is possible by evaporating doped source material such as heavily doped silicon
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH