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March 2007

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Subject:
From:
ZLATKO BIJEDIC <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, ZLATKO BIJEDIC <[log in to unmask]>
Date:
Thu, 15 Mar 2007 16:04:31 -0700
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text/plain
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text/plain (57 lines)
Steve:
I would fix this scratch on cowercoat. Here you can find some information regarding "liquid Kapton".
This is from COATES, two components
1.  XV601T-2-ORANGE 1/FLEX RES .67K;  CAWN 1373
2. XV601T-2 CLEAR SCR 1/FLEX HARD .33K;   CAWN 1372



----- Original Message ----
From: Steve Gregory <[log in to unmask]>
To: [log in to unmask]
Sent: Thursday, March 15, 2007 10:35:14 AM
Subject: [TN] Flex Circuit Scratch...


Morning All!

There were a few rigid flex assemblies brought to me this morning with
some scratches in the coverlay of the flex. They are pretty minor, but
they do go down into some traces a bit. I don't think the traces are
really signal traces, but are part shielding pattern on the outside of
the flex. Check-out:
http://stevezeva.homestead.com/files/Flex_Scratch.jpg

My question is; is this a defect that has to be repaired, and if so what
do I use to repair the scratches with? Normally I would use soldermask
on a rigid board if the scratches doesn't reduce the trace cross-section
beyond limits, but these traces aren't signal traces, and this isn't a
rigid board.

I think this happened during the de-masking operation after conformal
coating...

Thanks!

-Steve Gregory-

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