14 June 1999 Image processing for SEMs: is this the way to go for CD metrology?
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Abstract
Image processing (IP) techniques are growing increasingly powerful. IP has been used extensively in the military field and is finding increased use in semiconductor manufacturing, specifically CD SEM metrology. The IP techniques discussed in this paper address methods that tend to sharpen and smooth the image coming from the scanning electron microscope. One such technique involves deconvolving the effect of a non-ideal electron beam spot. As an example, a vendor supplied IP technique is used to define a methodology to judge the merits of such techniques for critical dimension metrology. Many images were analyzed with and without processing to assess the effects on resolution, accuracy and precision.
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Eric P. Solecky and Charles N. Archie "Image processing for SEMs: is this the way to go for CD metrology?", Proc. SPIE 3677, Metrology, Inspection, and Process Control for Microlithography XIII, (14 June 1999); doi: 10.1117/12.350867; https://doi.org/10.1117/12.350867
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