An unbalanced stack-up is not a great start but there’s more.
In this video, we’re on the manufacturing floor with Billy looking at how we check a PCB for warpage, what can cause a board to bow or twist, and what we can sometimes do to bring a warped board back within tolerance.
We cover everything from uneven copper distribution and asymmetric dielectric thicknesses to prepreg selection, lamination cooling, routing, and single-sided constructions.
One of the biggest takeaways: some warpage issues originate in fabrication, but others can be inherent to the PCB design or stack-up, which is why catching them before manufacturing starts matters.
What’s the most common cause of warpage you’ve encountered?