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| From [log in to unmask] Thu Dec 12 15: |
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Hi Jim -
I haven't the foggiest idea what your brown residue is but you could
conduct a Fourier Transform Infrared (FTIR) analysis to pinpoint its
identity. FTIR analysis is the organic material analysis counterpart
to Scanning Electron Microscopy (SEM) analysis for elements. With the
FTIR analysis you can compare the residue scan with a phenolic scan, a
solder mask scan, and a lacquer scan to see if any match. Good Luck.
Dave Hillman
Rockwell Collins
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______________________________ Reply Separator _________________________________
Subject: Brown resin like residue in solder bath
Author: [log in to unmask] at ccmgw1
Date: 12/11/96 3:14 AM
We have recently experenced a brown resin like substance in our
solder bath after wave solder of a qty of paper phenolic pcbs.
The boards have a solder resist and laqer finish.
Can anyone tell me what this bown substance is and what is the cause.
Thank you
Jim Hedderick
[log in to unmask]
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