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- W4280495565 abstract "In this work, we demonstrate vertically stacked multilayer sub-1-nm In 2 O 3 field-effect transistors (FETs) with surrounding gate in a back-end-of-line (BEOL) compatible low-temperature fabrication process. A typical bottom-gated single layer In 2 O 3 FET with maximum on-state current (I ON ) of 890 μA/ μm at V DS = 0.8 V and an on/off ratio over 10 6 is achieved with a channel length (L ch ) of 100 nm. The effects of HfO 2 capping and O 2 annealing are systematically studied, which is critical to realizing the multilayer FETs. Each atomically thin In 2 O 3 channel layer with a thickness (T IO ) of 0.9 nm is realized by atomic layer deposition (ALD) at 225 °C. Multilayer FETs with a number of In 2 O 3 layers up to 4 and 1.2 nm-thick HfO 2 between each individual layer are fabricated. An enhancement of on-state current (I ON ) from 183 μA in a single layer In 2 O 3 FET to 339 μA in a 4 layer device with an on/off ratio of 3.4 × 10 4 is achieved, demonstrating the key advantage of the multilayer FETs to improve the current. Several critical features, such as large-area growth, high uniformity, high reproducibility, ultrathin body, flexibility, and BEOL compatibility, have turned ALD In 2 O 3 into a noteworthy candidate for next-generation oxide semiconductor channel materials." @default.
- W4280495565 created "2022-05-22" @default.
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- W4280495565 date "2022-05-16" @default.
- W4280495565 modified "2023-10-14" @default.
- W4280495565 title "Vertically stacked multilayer atomic-layer-deposited sub-1-nm In<sub>2</sub>O<sub>3</sub> field-effect transistors with back-end-of-line compatibility" @default.
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- W4280495565 doi "https://doi.org/10.1063/5.0092936" @default.
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