子計畫二：鐵電鉿基氧化物之負電容特性研究及相關應用(2/2)

Being the first demonstration of quasi-antiferroelertic Hf1-xZrxO2 (QAFE-HZO, Zr=75%) negative-capacitance (NC) FET with non-hysteretic bi-directional sub-60mV/dec (SSfor=51mV/dec, SSrev=53mV/dec, VT<1mV) for low onset voltage and high speed response, both forward & backward (reverse) sweep exhibit obvious N-DIBL and NDR of QAFE-HZO to confirm NC effect. There is an operation window for steep SS without hysteresis for QAFE-HZO as compared with accompanying a non-negligible hysteresis FE-HZO (Zr=50%). The QAFE-HZO is also serviceable for both n-type and p-type channel FETs. The voltage transient response presents NC time 48%-77% improvement and VFE overlap of negative dQ/dVFE for forward and reverse, indicating non-hysteretic QAFE-HZO.