Even with hidden solder joints on conventional leaded components it is required to x-ray for process qualification and testing.
By analysis of PCBAs, which were produced in companys without x-ray capabilities, we know, that high risks of reliability exist in electronics industry, without the producers are really concious about it.
At TAUBE ELECTRONIC all hidden solder joints are checked by x-ray, if the boards are manufactured according to IPC-A-610 class 3. In class 2 for every batch process control and sampling inspection is done, thus PCBAs can be shipped with checked quality to our customers.