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- Title
Integrated 2D multi-fin field-effect transistors.
- Authors
Yu, Mengshi; Tan, Congwei; Yin, Yuling; Tang, Junchuan; Gao, Xiaoyin; Liu, Hongtao; Ding, Feng; Peng, Hailin
- Abstract
Vertical semiconducting fins integrated with high-κ oxide dielectrics have been at the centre of the key device architecture that has promoted advanced transistor scaling during the last decades. Single-fin channels based on two-dimensional (2D) semiconductors are expected to offer unique advantages in achieving sub-1 nm fin-width and atomically flat interfaces, resulting in superior performance and potentially high-density integration. However, multi-fin structures integrated with high-κ dielectrics are commonly required to achieve higher electrical performance and integration density. Here we report a ledge-guided epitaxy strategy for growing high-density, mono-oriented 2D Bi2O2Se fin arrays that can be used to fabricate integrated 2D multi-fin field-effect transistors. Aligned substrate steps enabled precise control of both nucleation sites and orientation of 2D fin arrays. Multi-channel 2D fin field-effect transistors based on epitaxially integrated 2D Bi2O2Se/Bi2SeO5 fin-oxide heterostructures were fabricated, exhibiting an on/off current ratio greater than 106, high on-state current, low off-state current, and high durability. 2D multi-fin channel arrays integrated with high-κ oxide dielectrics offer a strategy to improve the device performance and integration density in ultrascaled 2D electronics. Here, the authors report the ledge-guided epitaxial growth of high-density 2D Bi2O2Se fin arrays and their application for the realization of 2D multi-channel fin field-effect transistors, showing improved on-state currents as the number of integrated channels is increased.
- Subjects
FIELD-effect transistors; EPITAXY; METAL oxide semiconductor field-effect transistors; DIELECTRICS; TRANSISTORS; SEMICONDUCTORS
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-47974-2