Automated X-ray inspection (also called AXI) is another important part of PCB assembly process;it is a technology based on the similar principles as automated optical inspection (AOI).

It is to uses X-rays as its source to automatically inspect the defects or features which are typically hidden from the positive view.

In WELLER,all the assembly soldering on BGA component, fine pitch components and QFN components must be done with X ray inspection with the machine equipped at our own house, and all the inspection record is backup in our system available for traceability. Rather than other supplier who do not have x-ray inspection machine and have to subcontracted it to outsource or do not do X-ray inspection at all and pass the defects or failures the customers.