SEMICONDUCTOR MEMORY AND METHOD OF IMPROVING YIELD THEREOF

摘要

PROBLEM TO BE SOLVED: To increase yield of chips while preventing signal contention of a sense amplifier using a high replacement flexibility redundancy and method. SOLUTION: Redundancy elements are integrated in at least two memory arrays which don't share the sense amplifiers. A defective row/column line in a first array or block is replaced with a redundant row/column line from its own redundancy. A corresponding row/column line whether defective or not is replaced in a second array or block which does not share sense amplifiers with the first block. The corresponding row/column line is replaced to mimic the redundancy replacement of the first block.