In failure analysis reports for PCB assembly defects, we often use EDX or call EDS (Energy-Dispersive X-ray spectroscopy) for chemical elemental analysis. However, many people don’t fully understand how EDX works, and they have only a vague idea of how to interpret an EDS elemental analysis report. In most cases, after running an EDX scan and obtaining an elemental analysis, they get stuck—unsure of what to do next. The real question is: What useful information can EDX actually provide?
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