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Abstract-The Z 2 -FET operation as capacitor-less DRAM is analyzed using advanced 2D TCAD simulations for IoT applications. The simulated architecture is built based on actual 28 nm FD-SOI devices. It is found that the triggering mechanism is dominated by the front-gate bias and the carrier's diffusion length. As in other FB-DRAMs, the memory window is defined by the ON voltage shift with the stored body charge. However, the Z 2 -FET's memory state is not exclusively defined by the inner charge but also by the reading conditions.

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