Cp. Volk et al., SEM calibration in the micrometer and submicrometer ranges by means of a periodic linear measure, MEAS TECH R, 43(4), 2000, pp. 346-352
A periodic linear measure is described for use in scanning electron microsc
opes, which has eight values for line width in the micrometer and submicrom
eter ranges. Methods have been developed for calibrating the SEM with such
a measure, which are not sensitive to errors in beam focusing.