Comparing the switching characteristics of two resistive RAM technologies: Cu-SiO2 conductive-bridging-RAMs and HfO2 Oxide-RAMs

We compare the switching behavior of two classes of resistive RAMs (RRAMs), namely Cu-SiO
₂
based conductive-bridging-RAMS (CBRAMs) and HfO
₂
based Oxide-RRAMs (OxRRAMs). In both devices the ON/OFF ratios are high, the set voltage is reproducible from cycle to cycle, and the reset voltage displays large dispersion. No forming stage is required in the investigated OxRRAMs. CBRAMs offer much lower programming voltage and current. The switching kinetics is limited by oxygen vacancy diffusion in OxRRAMs and by copper nucleation in CBRAMs.