Overcoming PSL Bead Agglomeration: Proper Sonication and Redispersal in Metrology
Monodisperse Polystyrene Latex (PSL) microspheres serve as the primary benchmark for calibrating optical particle counters and semiconductor wafer inspection systems. During storage, natural settling causes these beads to cluster into doublets and triplets that skew sensor calibration curves and fail ISO compliance audits. Attempting to disperse these aggregates through vigorous shaking or harsh immersion probe […]
