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Date: | Mon, 13 Jan 2003 07:55:49 +0800 |
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Visual inspection criteria for are:
- Flat surfaces, top and bottom (especially no convex doming - difficult to
achieve if boards are HASL finished, but not impossible).
- Surfaces flush with the rest of the board.
- Good plating adhesion over the top.
- No apparent shrinkage from the hole sides.
Our boards are subject to vibration testing, so we examine boards for any
cracking of the epoxy-filling.
Peter
Franklin D Asbell <[log in to unmask]> 11/01/2003 12:57 AM
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Asbell
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cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group)
Subject: [TN] Visual inspection criteria from conductive epoxy-filled vias
What specific inspection criteria should be followed for the visual
inspeciton of conductive epoxy-filled vias?
Besides the cross-sectional, thermal-shock, etc etc....what are some other
tests performed on this type feature???
Thanks,
Franklin D Asbell
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