Werner, to continue on the thread a bit, which is the "best" test
1) HASS type test with temp change >30C/min with vibration (20-30 GRMs) for a
period of 2-4 hours (great for mechanical stressing)
2) ESS slow temp change 5C/min but a longer test time of 72-100 hours this might
allow chemical reactions to happen.

If making PWAs with uBGA, which course of test would best benifit relilability
screening of production.

Thanks for anyones input.

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