FeRAM Recovery up to 200 Periods with Accumulated Endurance 1012 Cycles and an Applicable Array Circuit toward Unlimited eNVM Operations

Asymmetric Field Cycling Recovery (AFCR) with a low E-field is proposed for the first time to extend the endurance cycles of a ferroelectric (FE) capacitor and is experimentally demonstrated for 200 periods and accumulated to 10
¹²
switching cycles. Positive and negative Asymmetric minor loops (AmL) with AFCR achieve the nondegradation and complete restoration of $\triangle 2 \mathrm{P}_{\mathrm{r}}$ toward the prospect of unlimited operation. Furthermore, an FeRAM array circuit with an inverting amplifier is designed to execute the Write/Read and Recovery procedures simultaneously by AFCR scheme.