International Business Machines Corporation
Single-sided liner PCM cell for 3D crossbar PCM memory

Abstract:

A cross-point memory array and stacked memory array structure. The memory array includes a plurality of first conductive line structures formed in a dielectric material layer; a plurality of memory elements, each memory element including a fill-in phase change memory (PCM) cell, and an access device enabling read or write access to said memory PCM structure; a plurality of second conductive line structures, the plurality of second conductive structures perpendicularly oriented relative to the plurality of first conductive structures. An individual memory element of the plurality of memory elements is conductively connected at a respective intersection between a first conductive line structure and a second conductive line structure. Each phase change memory (PCM) cell of a memory element at an intersection having a sub-lithographic conductive tuning liner disposed on only one sidewall of the PCM cell. The manufacturing maintains a minimal number of masking and processing steps.