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[Analysis Case] Analysis of Organic Foreign Substances on Printed Circuit Boards

Reduce the impact of foreign matter surrounding information through appropriate sampling and microscopic measurement.

We will introduce a case study of foreign substance evaluation using micro FT-IR analysis combined with sampling. Foreign substances on electrodes with almost no substrate influence were identified as flux, but no information from the foreign substances on the printed circuit board could be obtained (Figure 1). By performing sampling on inorganic crystals, information about the foreign substances was obtained, and they were identified as flux (Figure 2).