Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

G - Physics

11

C

352/82

G11C 17/00 (2006.01) G11C 29/00 (2006.01)

Patent

CA 1214553

A SEMICONDUCTOR MEMORY DEVICE ABSTRACT OF THE DISCLOSURE A semiconductor memory device comprising a plurality of memory cell blocks corresponding to output terminals, respectively, and a redundancy memory cell block replace- able with a faulty memory cell block among the memory cell blocks, the redundancy memory cell block having a first specific area for storing a first predetermined data of electronic signatures, each of the memory cell blocks having a second specific area for storing a second predetermined data equal to a divided one of the first predetermined data in one by one correspondence, and the semiconductor memory device further comprises a means for selectively reading, when one of the memory cell blocks is replaced by the redundancy memory cell block, a divided one of the first predetermined data corresponding to the second predetermined data stored in the memory cell block to be replaced by the redundancy memory cell block, whereby the second predetermined data can be correctly read out even when a faulty memory cell block is replaced with the redundancy memory cell block.

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