Print Email Facebook Twitter Surface effects in simulations of scanning electron microscopy images Title Surface effects in simulations of scanning electron microscopy images Author van Kessel, L.C.P.M. (TU Delft ImPhys/Charged Particle Optics) Hagen, C.W. (TU Delft ImPhys/Charged Particle Optics) Kruit, P. (TU Delft ImPhys/Charged Particle Optics) Date 2019 Abstract Background: Monte Carlo simulations of scanning electron microscopy (SEM) images ignore most surface effects, such as surface plasmons. Previous experiments have shown that surface plasmons play an important role in the emission of secondary electrons (SEs).Aim: We investigate the influence of incorporating surface plasmons into simulations of low-voltage critical dimension SEM (CD-SEM).Approach: We use a modified inelastic scattering model, derived for infinite flat surfaces, and apply it to nonflat, but smooth, geometries. This simplification captures most qualitative effects, including both surface plasmons and a reduced interaction with bulk plasmons near interfaces.Results: We find that the SE signal hardly changes when surface interactions are turned on for a perpendicularly incident beam. When the incident beam is perfectly parallel to a surface, the SE signal does significantly increase. However, the beam must be extremely close to the surface for this effect to be appreciable. An SEM is unable to produce a beam that is both narrow and parallel enough to be noticeably affected.Conclusions: The position of edges may appear shifted under specific circumstances. In realistic situations, it is unlikely to be a large effect. Subject Monte Carlo simulationscanning electron microscopysurface plasmons To reference this document use: http://resolver.tudelft.nl/uuid:86a7d488-3b8e-4506-a91e-c89f129aa471 DOI https://doi.org/10.1117/1.JMM.18.4.044002 ISSN 1932-5150 Source Journal of Micro/Nanolithography, MEMS, and MOEMS, 18 (4) Part of collection Institutional Repository Document type journal article Rights © 2019 L.C.P.M. van Kessel, C.W. Hagen, P. Kruit Files PDF 044002_1.pdf 1.42 MB Close viewer /islandora/object/uuid:86a7d488-3b8e-4506-a91e-c89f129aa471/datastream/OBJ/view