1. What is AXI?

AXI is short for automated X-ray inspection, it's one of the most commonly used approaches for defect inspection in PCB Assembly. Not only does AXI check the solder joints under components, but it also reveals many defects in solder joints that may not be visible by the ordinary optical inspection equipment.

2. How Does AXI Work?

In order to effectively inspect the PCB Assembly’s quality, three conditions are required for AXI:

First, X-ray is a must:

Unlike automated optical inspection (AOI), automated X-ray inspection (AXI) uses 

X-rays as its light source, instead of visible light, and utilize its penetrating a

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