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