Jason,

Ask your wife/girlfriend/significant other (or all 3 :')) for a bottle
of fingernail polish.
you may want to get a bottle of fingernail polish remover too (or
Acetone) to thin it out 
some if necessary, and for cleanup.  It works very well.


Jim
 

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of Jason Harper
Sent: Monday, August 25, 2008 10:20 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Solder mask touch-up?

On a recent batch of PCBs I had made, a slight misalignment of the
solder mask resulted in a few boards having an exposed trace - right
underneath an 0603x4 resistor network, where it's quite likely to result
in an invisible short.  Is there something that I could perhaps paint
over the trace, that would insulate it (only needs to withstand 12V),
and would survive the heat of soldering?

I'm aware that there are some commercial touch-up paints, however the
smallest bottles they appear to be sold in are far more than I'd ever
need, at a price that would make it more economical for me to simply
discard the boards.  I'm hoping that there is something more readily
available (White-Out?  Nail polish?) that is adequate for the job.
      Jason Harper
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