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Multi-Level Operation of Ferroelectric FET Memory Arrays for Compute-In-Memory Applications
Conference paper

Multi-Level Operation of Ferroelectric FET Memory Arrays for Compute-In-Memory Applications

Franz Muller, Sourav De, Maximilian Lederer, Raik Hoffmann, Ricardo Olivo, Thomas Kampfe, Konrad Seidel, Tarek Ali, Halid Mulaosmanovic, Stefan Dunkel, …
2023 IEEE International Memory Workshop, IMW 2023 - Proceedings
2023
DOI: https://doi.org/10.1109/IMW56887.2023.10145940

Abstract

array FeFET ferroelectric memory multilevel neural network Hardware and Architecture Electrical and Electronic Engineering Safety Risk Reliability and Quality Electronic Optical and Magnetic Materials
We report on the multi-level-cell (MLC) operation of AND-connected ferroelectric FET (FeFET) arrays and their suitability for Compute-in-Memory (CiM) applications. The switching behavior and device variation of FeFETs in a passive AND array test-structure configuration is investigated. From this, we derive suitable write schemes and inhibit schemes capable of protecting any FeFET state. This enables the MLC operation of the AND arrays, yielding a performance suitable for CiM applications. We investigate the impact of the obtained bit-error-rate (BER) of 4% in inference-only operation, which shows only a 1% degradation from the floating-point (FP) accuracy for CIFAR-10 datasets with LeNET.

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