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- W1967870557 abstract "Si surface damage induced by H 2 plasmas was studied in detail by optical and electrical analyses. Spectroscopic ellipsometry (SE) revealed a decrease in the pseudo-extinction coefficient <κ> in the region of photon energy higher than ∼3.4 eV upon H 2 -plasma exposure, which is attributed to the disordering of crystalline silicon (c-Si). The increase in <κ> in the lower energy region indicates the presence of trap sites for photogenerated carriers in the energy band gap in the E – k space of Si. The current–voltage ( I – V ) measurement of metal-contacted structures was performed, revealing the following characteristic structures: thinner surface (SiO 2 ) and thicker interface (SiO 2 :c-Si) layers on the Si substrate in the case of H 2 -plasma exposure than those with Ar- and/or O 2 -plasma exposure. The structure assigned on the basis of both SE and I – V was further analyzed by a layer-by-layer wet-etching technique focusing on the removability of SiO 2 and its etch rate. The residual damage-layer thickness for the H 2 -plasma process was thicker (∼10 nm) than those for other plasma processes (<2 nm). Since the interface layer plays an important role in the optical assessment of the plasma-damage layer, the present findings imply that a conventional two-layer (SiO 2 /Si) optical model should be revised for in-line monitoring of H 2 -plasma damage." @default.
- W1967870557 created "2016-06-24" @default.
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- W1967870557 date "2010-08-01" @default.
- W1967870557 modified "2023-09-24" @default.
- W1967870557 title "Optical and Electrical Characterization of Hydrogen-Plasma-Damaged Silicon Surface Structures and Its Impact on In-line Monitoring" @default.
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- W1967870557 doi "https://doi.org/10.1143/jjap.49.08jd02" @default.
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