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