14 June 1999 Metrology methods for quantifying edge roughness: II
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Advanced scanning electron and atomic force microscopy technique have been developed to quantify line-edge and sidewall roughness in patterned resist and silicon feature with nanometer scale accuracy. Both techniques are able to follow small changes in the line-edge roughness. The measurement repeatability of the scanning electron and atomic force microscope was characterized and is 0.1 and 0.6 nm, respectively. Any roughness measured in the single layer resist mask transfers to the underlying silicon throughout a range of pattern transfer conditions. Within the measurement precision, silicon pattern transfer does not appear to decrease or increase the sidewall or line-edge roughness. An attempt to quantify the edge-roughness spatial frequency is discussed. The scanning electron microscope is still recommended over the atomic force microscope for line-edge roughness measurements based on sample throughput.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Carla M. Nelson-Thomas, Carla M. Nelson-Thomas, Susan C. Palmateer, Susan C. Palmateer, Anthony R. Forte, Anthony R. Forte, Susan G. Cann, Susan G. Cann, S. Deneault, S. Deneault, Theodore M. Lyszczarz, Theodore M. Lyszczarz, } "Metrology methods for quantifying edge roughness: II", Proc. SPIE 3677, Metrology, Inspection, and Process Control for Microlithography XIII, (14 June 1999); doi: 10.1117/12.350860; https://doi.org/10.1117/12.350860

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