Quantitative electron-probe microanalysis of light elements: Determination ofa-Si∶C∶N∶O∶H insulating films |
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Authors: | Peter Willich Dieter Obertop |
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Institution: | (1) Philips GmbH Forschungslaboratorium Hamburg, P.O. Box 540840, D-2000 Hamburg 54, Federal Republic of Germany |
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Abstract: | Amorphous Si C N O H films (1–3 m) are studied by EPMA after deposition of gold (1–5 nm) as a conductive coating. Its influence on thek-ratios (X-ray intensity relative to an uncoated standard) of silicon, carbon, nitrogen and oxygen is described as a linear function of the simultaneously determinedk-ratio of gold. Thek-ratios representing the uncoated specimen are obtained by extrapolation and, in combination with the PAP matrix correction model, quantitative EPMA can be performed with an analytical error of 2–5%, as it is demonstrated by samples of SiC, Si3N4 and SiO2. No systematic shift of the concentrations is observed for layers ofa-Si C N O H determined at various electron energies of 5–12.5 keV. Hydrogen is calculated by difference and the concentrations prove to be a useful estimate in agreement with the results of chemical analysis. Si-K /Si-K![beta](/content/k3465821u2l0m643/xxlarge946.gif) spectra recorded on organo-silicon films and binary silicon compounds point out significant differences concerning the formation of Si-C, Si-N and Si-O chemical bonds. |
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Keywords: | electron-probe microanalysis (EPMA) light elements (C N O) thin films organo-silicon polymers hydrogen chemical state |
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