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Title: Improved interfacial and electrical properties of HfLaON gate dielectric Ge MOS capacitor by NbON/Si dual passivation layer and fluorine incorporation
Authors: Huang, Y
Xu, JP
Liu, L
Lai, PT
Tang, WM 
Issue Date: 2016
Publisher: American Institute of Physics
Source: Applied physics letters, 2016, v. 109, no. 19, 193504 How to cite?
Journal: Applied physics letters 
Abstract: Ge metal-oxide-semiconductor (MOS) capacitor with HfLaON/(NbON/Si) stacked gate dielectric and fluorine-plasma treatment is fabricated, and its interfacial and electrical properties are compared with its counterparts without the Si passivation layer or the fluorine-plasma treatment. The experimental results show that the HfLaON/(NbON/Si) Ge MOS device treated by fluorine plasma exhibits excellent performance: low interface-state density (4.3 × 1011 cm-2 eV-1), small flatband voltage (0.22 V), good capacitance-voltage behavior, small frequency dispersion and low gate leakage current (4.18 × 10-5 A/cm2 at Vg = Vfb + 1 V). These should be attributed to the suppressed growth of unstable Ge oxides on the Ge surface during gate-dielectric annealing by the NbON/Si dual interlayer and fluorine incorporation, thus reducing the defective states at/near the NbSiON/Ge interface and improving the electrical properties of the device.
ISSN: 0003-6951
EISSN: 1077-3118
DOI: 10.1063/1.4967186
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