Abstract
A technique for achieving tunable threshold voltage ( $\text{V}_{\mathrm{ TH}})$ is investigated in a gate-all-around device, which is a representative floating body structure. For this concept, the in-plane gate is designed to be both a driving gate and a control gate. The control gate governs the potential distribution along the gate electrode, which acts as a built-in voltage divider in the MOSFET. During the $\text{V}_{\mathrm{ TH}}$ tuning by the control gate, there is no electrical performance degradation, and modulation of $\text{V}_{\mathrm{ TH}}$ follows a nearly perfect linear tendency. The results are verified by the electrical measurements of the fabricated device and a multi-physics simulator.
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