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