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20 April 2024

» arxiv » 1507.2705

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Numerical and experimental studies of the carbon etching in EUV-induced plasma
D.I. Astakhov ; W.J. Goedheer ; C.J. Lee ; V.V. Ivanov ; V.M. Krivtsun ; O. Yakushev ; K.N. Koshelev ; D.V. Lopaev ; F. Bijkerk ;
Date:	9 Jul 2015
Abstract:	We have used a combination of numerical modeling and experiments to study carbon etching in the presence of a hydrogen plasma. We model the evolution of a low density EUV-induced plasma during and after the EUV pulse to obtain the energy resolved ion fluxes from the plasma to the surface. By relating the computed ion fluxes to the experimentally observed etching rate at various pressures and ion energies, we show that at low pressure and energy, carbon etching is due to chemical sputtering, while at high pressure and energy a reactive ion etching process is likely to dominate.
Source:	arXiv, 1507.2705
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