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| From [log in to unmask] Mon Dec 23 12: |
58:28 1996 |
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I have seen variations between 200 and 1200 microinches by XRF.
I also know these ranges were customer driven.
Experimentally, when the XRF read anything other than 60/40, one was
off the pad, and remeasurement was necessary. Otherwise a specific
sample was faken at various locations on both sides the board and marked
as such on the report. For example, Front Left Corner - Fiducial Pad,
and so on.
I'd like to know of any HASL Surface Tolerance specifications also.
[log in to unmask]
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