Ferroelectric TiN/Hf0.5Zr0.5O2/TiN Capacitors with Low-Voltage Operation and High Reliability for Next-Generation FRAM Applications

In this study, we investigated the ferroelectric properties of Hf0.5Zr0.5O2 (HZO) thin films with different thicknesses (5-20 nm) deposited by atomic layer deposition for the development of future ferroelectric random access memory cells. HZO-based capacitors with a thickness of 5 nm exhibited a switching polarization of ~13 μC/cm2 and a ferroelectric saturation voltage of ~1.0 V as extracted from the pulse write/read measurements. Furthermore, we performed fatigue measurements and we found no degradation up to 1010 switching cycles at 1.2 V.