Comparison of switching characteristics of HfOx RRAM device with different switching layer thicknesses

Abstract

This paper presents switching characteristics of Ni/HfOx/p(+)-Si with different switching layer thicknesses (5/10 nm) in DC mode. Larger forming voltage and on/off ratio is obtained from the 10 nm HfOx RRAM while step-like reset process is seen from 5 nm HfOx RRAM. From the measurement results, fabricated RRAM device with thicker switching layer is more suitable for nonvolatile memory operation while thinner HfOx layer has potential for application in neuromorphic computing system.