{HEAD ~ A semiconductor layer} with {TAIL ~ a doping} of a second conductivity type is applied at a surface of the semiconductor substrate 
{ HEAD ~ A semiconductor layer } with { TAIL ~ a doping } of a second conductivity type is applied at a surface of the semiconductor substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH