X-ray is much quicker than cross section to qualify a process.
Suggest enough cross sections to verify what is being measured by x-ray.

As an EMS, one customer had a requirement for 100% x-ray inspection under a
critical component. EMS purchased 5 in line 5DX machines for this 13 years
ago. This was a life critical a sensor.

Again, can you live with the with a 25% hole fill undetected in the
product?  If the process drifts, how big a deal is it to get back on track,
what happens to the previously run product. Many signal pins won't care,
many environments won't care, what about your pins and your environments
and your price of failure? A colleague had to testify at court when an air
bag did not deploy. Not a 1 time occurrence.

The IPC 610 provides a starting point. Part of the job is determining if it
is sufficient for the work at hand.


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