De. Greenfield et al., CONTROL OF PRODUCING SUMICRON X-RAY MASKS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 405(2-3), 1998, pp. 514-518
A depth control method in etching metal films for X-ray lithography ma
sks is developed and experimentally confirmed. Possibilities of real-t
ime end-point detection and applicability of this technique for automa
tic process control are demonstrated.