said {HEAD ~ sidewall surface} of said {TAIL ~ main part} including a sharply pointed tip end part defined by two crystal surfaces and located at a lower side of an interface between said gate insulation film and said silicon substrate 
of
said { HEAD ~ sidewall surface } of said { TAIL ~ main part } including a sharply pointed tip end part defined by two crystal surfaces and located at a lower side of an interface between said gate insulation film and said silicon substrate
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH