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An overview is given on advances of science and devices of InGaAs, Ge, and GaN MOS capacitors and inversion-channel and depletion-mode MOSFET’s, with emphasis on the results using ultra-high vacuum (UHV) deposited Ga2O3(Gd2O3) [GGO] and atomic layer deposited (ALD) oxides as high-k dielectrics. Very importantly, no interfacial layers are employed in these MOS devices. Low interfacial densities of...
Ultra-high-vacuum (UHV) deposited Ga2O3(Gd2O3) [GGO] has been employed for passivating InGaAs and Ge, without using any interfacial paissivation layers (IPLs). The GGO/InGaAs and /Ge metal-oxide-semiconductor capacitors (MOSCAPs) have exhibited low capacitance-equivalent-thickness (CET) of less than 1nm in GGO, low interfacial densities of states (Dit's) ~ 1011eV-1cm-2, and thermal stability at high...
In this work, without employing any IPL, excellent electrical performances for the Ge MOS devices, i.e. MOSCAPs and MOSFETs, have been demonstrated using ultra high vacuum (UHV) deposited Ga2O3(Gd2O3) [GGO] directly on Ge (100) with the incorporation of fluorine. The GGO/Ge interface is atomically abrupt with negligible Ge inter-diffusion and highly thermodynamically stable withstanding high temperature...
We have achieved high device performance in self-aligned inversion-channel InGaAs MOSFETs, as well as a CET of <; 1 nm, a Dit ≤ 1011 eV-1cm-2, and high-temperature thermal stability withstanding >850°C RTA in GGO and a CET of <; 1 nm in ALD-HfO2 on InGaAs. Remarkable device performances in self-aligned, inversion-channel Ge MOSFET using GGO without any interfacial passivation layers (IPLs),...
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