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58:24 1996 |
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The original spec was put in by the military to eliminate "punch through."
This happens in the Z direction in thin cores and thick (large tooth) copper.
With new copper (low profile) techniques, this should not be a problem. I'd
worry only with very thin core and thick large tooth copper. The cost
advantage is obvious.
J S Sallo Sallo Consulting Services
Phone or fax 619 346 6717
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