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- W1971796257 abstract "InP is a commonly used compound semiconductor with wide applications in electronic, optoelectronic, and photonic devices. Compared to GaAs, InP is widely believed to be a more forgiving material with respect to Fermi level pinning and has a higher electron saturation velocity (2.5×10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>7</sup> cm/s) as well. It could be a viable channel material for high-speed logic applications if a high-quality, thermodynamically stable high-k dielectric could be found. [1] It is of great importance for the understanding of high-k/InP interfaces since InP is identified as a transition layer for ALD high-k/InGaAs quantum well transistor in state-of-the-art devices. [2] Motivated by previous work on surface orientation studies of GaAs [3] and InGaAs [4], we have systematically studied NMOSFETs, MOSCAPs, and interfacial chemistry on two different crystalline surfaces: InP (100) and (111)A (In-rich). With ALD Al <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> O <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> in direct contact as gate dielectric, a record high drain current of 600 µA/µm is obtained for an InP inversion-mode MOSFET on the (111)A surface with a gate length of 1µm, which is a factor of 2.6 enhancement compared to the (100) surface at the same V <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>G</inf> -V <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>T</inf> condition. The smoother Al <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> O <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> /(111)A interface and a shift of the charge-neutrality-level (CNL) [5] on InP(111)A toward the conduction band edge is identified as the origin of this drain current enhancement in spite of the extracted interface trap density (D <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>it</inf> ). [6] In this paper, we report on “zero” drain-current drift on InP (111)A MOSFETs which is a major issue to prevent commercializing InP MOSFET technology on (100) surface in 1980s. [7]" @default.
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- W1971796257 date "2011-06-01" @default.
- W1971796257 modified "2023-10-16" @default.
- W1971796257 title "“Zero” drain-current drift of inversion-mode NMOSFET on InP (111)A surface" @default.
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- W1971796257 doi "https://doi.org/10.1109/drc.2011.5994430" @default.
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