Advantageously, {HEAD ~ the lower polysilicon gate level} has {TAIL ~ both an accurately defined length} to provide the desired channel length and a well controlled doping concentration to provide the desired threshold voltage 
Advantageously , { HEAD ~ the lower polysilicon gate level } has { TAIL ~ both an accurately defined length } to provide the desired channel length and a well controlled doping concentration to provide the desired threshold voltage
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH