{TAIL ~ A memory cell} of an SRAM has two drive MISFETs and {HEAD ~ two vertical MISFETs} 
{ TAIL ~ A memory cell } of an SRAM has two drive MISFETs and { HEAD ~ two vertical MISFETs }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD