REDUNDANCY SYSTEM FOR SEMICONDUCTOR DEVICE

摘要

PURPOSE:To make the distance between a fault bit and normal bit larger by relieving the adjacent bit line pairs of the bit line pair in which the faulty bit occurs. CONSTITUTION:When a faulty point A occurs in a bit line pair B and the inverse of B connected with a sense amplifier, the adjacent bit line pairs B and the inverse of B on both sides of the faulty bit line pairs B and the inverse of B in which the faulty point A occurs are relived together with the faulty bit line pairs B and the inverse of B. Therefore, the distances between the faulty bit line B and the inverse of B and normal bit line pairs B and the inverse of B become larger and adverse influences from the faulty bit line pair B and the inverse of B to the normal bit line pairs B and the inverse of B can be reduced.