Hi to all,
Looking for service or friendly (aren't we all) PWB manu. who has the
capability to measure COPPER plating thickness in via holes in FINISHED BRD. i.e.
with HASL in via holes. NON-DESTRUCTIVE TESTING
Description of brd:-
20 layers
~150 mils thick
Via holes are 20-22 mils finished.
Required plating is 0.0015 min.
A few I have learnt about are CMI (probe inside the hole) & UPA (resistance
measurement)
Rush
818-415-0030
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