Note: We have a customer who performs a thermal stress on unconditioned (no
pre-bake) coupons and then checks for the % of hole wall pullaway.
1. Do any PWB manufacturers monitor the frequency and % of hole pullaway on
double sided vs multilayer boards.
2. What is an average frequency and %?
3. What is the opinion on the best hole wall prep? Chemical, plasma or a
combination of both?
Thanks for any input and advice,
Scott
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