{HEAD ~ The shorter channel length}, when combined with the deeper enhancement region, allows for higher lifetime electron irradiation doses or {TAIL ~ heavy metal diffusion temperatures} 
allows for
{ HEAD ~ The shorter channel length } , when combined with the deeper enhancement region , allows for higher lifetime electron irradiation doses or { TAIL ~ heavy metal diffusion temperatures }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL