纳米尺度相变存储器小型化研究进展
Micronanoelectronic Technology(2015)
Abstract
相变存储器(PCRAM)因其具有非挥发性、循环寿命长、结构简单、与现有CMOS工艺相匹配等优点,在存储技术领域受到了广泛重视.综述了相变存储器器件小型化的研究现状,介绍了相变存储器的基本原理和特性.概述了目前相变存储器器件小型化的方法,主要包括器件结构优化和材料优化.器件结构优化的主要目的是减小有效相变体积以降低单元尺寸.材料优化主要是针对电极材料,选用性能优异的新材料替代传统金属材料作电极材料以实现器件小型化.对不同方法制作的各种器件结构所涉及的工艺特点进行了分析,并且比较了不同的器件结构对操作电流的影响,为相变存储器器件小型化的进一步发展提供了参考.
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