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