{HEAD ~ Boron} doped {TAIL ~ silicon} thin films can be formed on the substrate in this manner 
doped
{ HEAD ~ Boron } doped { TAIL ~ silicon } thin films can be formed on the substrate in this manner
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH