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