{HEAD ~ The conductivity} of the polysilicon may be increased by increasing {TAIL ~ the concentration} of the conductive impurities 
increased by increasing
{ HEAD ~ The conductivity } of the polysilicon may be increased by increasing { TAIL ~ the concentration } of the conductive impurities
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH