BACKUP LINE ASSIGNMENT DEVICE, MEMORY SAVING DEVICE, BACKUP LINE ASSIGNMENT METHOD, MEMORY MANUFACTURING METHOD, AND PROGRAM

摘要

Backup row association determines in the memory with multiple backup rows, the fail bits of failure row towards capable failure row and towards column include which is unsuccessfully gone, backup row is distributed to so that these are unsuccessfully gone, it include: bit calculation unit, for use in eaCH fail bits, it include multiple orthogonal ineffectiveness bits in each out-of-service sequence, it include multiple failure bits in each out-of-service sequence, the direction of each failure bit and each out-of-service sequence, and the quantity of orthogonal ineffectiveness bit, each failure bit, which is linked together, to be weighted; Unit calculates weighting coefficient for each failure series, and the orthogonal failure digit based on fault bit stores the weighting coefficient linked with each failure sequence in each failure sequence; And clamping unit, the calculating of which failed row weighting coefficient of backup row is distributed based on relative number determination, calculated by weight calculation unit.