Nanoscale Measurements with a Through-Focus Scanning-Optical-Microscope
Ravikiran Attota, Richard M. Silver, Thomas A. Germer
We present a novel optical technique that produces nanometer dimensional measurement sensitivity using a conventional optical microscope, by analyzing through-focus scanning-optical-microscope (TSOM) images obtained at different focus positions. In principle, this technique can be used to identify which dimension is changing between two nanosized targets and to determine the dimension using a library-matching method. This methodology has potential utility for a wide range of target geometries and application areas, including, nanometrology, nanomanufacturing, defect analysis, semiconductor process control, and biotechnology.
, Silver, R.
and Germer, T.
Nanoscale Measurements with a Through-Focus Scanning-Optical-Microscope, Future Fab International, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902707
(Accessed December 10, 2023)