Discussion of cost-effective redundancy architectures

To get a reasonable yield, memories incorporate redundancies to substitute for faulty cells. As the performance of repair algorithm reaches some saturation point, recent studies focus on various redundancy architectures for higher repair rate. In this paper, three kinds of spares, i.e., local, common, and global spares, are discussed to analyze the efficiency of redundancy architectures in respect of the repair cost. In order to estimate the impact of each spare, more than a hundred redundancy architectures are simulated with different faulty patterns. This paper performs a data analysis and suggests cost-effective redundancy architectures.