FAILURE RESCUE ANALYSIS METHOD OF MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To speedily perform 100% rescue analysis for redundancy with a limitation in the effective range of a spare rescuing machine. SOLUTION: After a rescue enable judgment treatment, the rescue enable judgment treatment of line failure, and the rescue enable judgment treatment of bit failure are performed, it is judged whether a limbo part is limited or not, the failure address connection of a spare column part is taken out of a buffer memory if it is limited, and rule check of the limbo part and the adjustment of the rescue address are performed for the obtained rescue address.