Model-based analysis of the limits of optical metrology with experimental comparisons

R. M. Silver; R. Attota; E. Marx

doi:10.1117/12.726201

18 June 2007 Model-based analysis of the limits of optical metrology with experimental comparisons

R. M. Silver, R. Attota, E. Marx

Proceedings Volume 6617, Modeling Aspects in Optical Metrology; 66170W (2007) https://doi.org/10.1117/12.726201
Event: Optical Metrology, 2007, Munich, Germany

Abstract

This paper presents a summary and analysis of a study on optical modeling for critical dimension metrology. The paper is focused on two primary elements: 1) the comparison, stability, and validity of multiple electromagnetic scattering models and 2) a series of model-to-experiment comparisons. A part of the study will cover improved model-to-theory agreement obtained using our new Scatterfield microscopy technique, which has enabled evaluation of previous unquantified errors. The Scatterfield microscopy technique allows us to step or scan an aperture in a conjugate back focal plane of the objective lens enabling illumination of a narrow cone of incident plane waves at a given primary angle of incidence. A series of angle resolved images or intensity data can be obtained for each angle of illumination.

Citation Download Citation

R. M. Silver, R. Attota, and E. Marx "Model-based analysis of the limits of optical metrology with experimental comparisons", Proc. SPIE 6617, Modeling Aspects in Optical Metrology, 66170W (18 June 2007); https://doi.org/10.1117/12.726201

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