Abstract
Carbonaceous deposits produced on Ru-capped multilayer mirrors under extreme ultra violet irradiation in the presence of adventitious gaseous hydrocarbons are a major obstacle to process implementation of EUV lithography. Here, by means of synchrotron radiation and laboratory measurements we show how carbon contamination occurs as a result of photoelectron-induced surface chemistry. We also demonstrate how a device based on an oxygen ion conducting solid electrolyte can act as a sensitive and reproducible sensor for detection of trace amounts of hydrocarbons in high vacuum environments.
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The authors acknowledge funding from BOC Edwards and the UK Engineering and Physical Sciences Research Council (EPSRC).
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Kyriakou, G., Stevens, A.V., Davis, D.J. et al. Amperometric/potentiometric hydrocarbon sensors: real world solutions for use in ultra high vacuum. J Appl Electrochem 38, 1089–1096 (2008). https://doi.org/10.1007/s10800-008-9568-5
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DOI: https://doi.org/10.1007/s10800-008-9568-5