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| From [log in to unmask] Thu Aug 22 06: |
05:23 1996 |
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What is the smallest acceptable plated through hole diameter in a .063"
thick FR4 board without running into barrel-cracking problems?
Our suppliers are saying that a .010" drill dia. is acceptable for vias, but
this exceeds the 3 to 4 aspect ratio (hole diameter to board thickness) that
many books specify. Are our books out of date?
Thanks in advance
Jack Tippit
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