A semiconductor memory device is provided with a plurality of {TAIL ~ primary memory cell blocks} and a replacement memory cell block identical in size to {HEAD ~ the primary memory cell blocks} 
A semiconductor memory device is provided with a plurality of { TAIL ~ primary memory cell blocks } and a replacement memory cell block identical in size to { HEAD ~ the primary memory cell blocks }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD