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Some manufacturers do X-ray boards. Typically this is done to check that BGA devices (https://en.wikipedia.org/wiki/Ball_grid_array https://en.wikipedia.org/wi
by crispyambulance 8y ago
Some manufacturers do X-ray boards.
Typically this is done to check that BGA devices (https://en.wikipedia.org/wiki/Ball_grid_array https://en.wikipedia.org/wiki/Ball_grid_array) are soldered properly. Usually not done on every board, but only if there's a problem suspected. When it happens they tend to focus only on particular BGA components or suspect copper traces rather than the whole PCB.
- extrapickles 8y agoUsually you scan boards at a percentage determined by statistics (SPC can get complex). However the checks are automated, so you would have to perform the checks in a different trust zone (eg: different country).
- scoggs 8y agoI'm guessing the answer is obviously yes that this type of x-ray would easily be able to discover / distinguish something the size of what's been described? (1mm x 2mm from what I've seen thus far?)
- PeterisP 8y agoThe x-ray picture would contain information sufficient to detect that thing, but it's quite plausible that the process/procedure of analyzing that x-ray would not find it. If they're looking for extra hardware, they're going to detect it, but if they're looking for bad solder joints, they're going to detect bad solder joints but not extra harware.
- scoggs 8y agoRight. It doesn't exactly align with what a normal auditor would be looking out for, I suppose. Thanks, I appreciate it.
- avip 8y agoI've only seen X-ray as a destructive test. AOI is pretty commonplace on a per-unit base, but whether it could or could not detect some modification depends on lots of details we don't have.