The control gate electrode 315 may be {TAIL ~ a polysilicon film} doped with {HEAD ~ impurities} 
The control gate electrode 315 may be { TAIL ~ a polysilicon film } doped with { HEAD ~ impurities }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD