Have you tried asking God? 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Daan Terstegge
Sent: Monday, November 22, 2004 12:31 PM
To: [log in to unmask]
Subject: [TN] Solder resist inspection underneath components

Hi Technet,

I have a problem with  a batch of boards of which I know that an
estimated 50% of them have a problem with the soldermask. The mask
(Dynamask 5040 dry film) is flaking off the board, and we didn't notice
this because the mask is only applied underneath the components (and all
of them have a low standoff, which makes it impossible to inspect).
Now we need to  know which of the boards are affected, but desoldering
some of the parts to take a peek is not an attractive option as these
boards are already parylene coated.

I'm quite convinced that the answer is "no", but still I'd like to give
it a try and ask the following question:
Does there exists ANY technology (non-destructive) that makes it
possible to inspect the quality of the soldermask underneath components?






Best regards,

Daan Terstegge
PCB Assembly Department
Thales Land & Joint Systems

Tel        +31(0)35 524 8297
Fax       +31(0)35 524 8181
[log in to unmask]
Unclassified Email

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