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| From [log in to unmask] Fri Jan 3 08: |
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Todd,
Havce you done cross sections of the soldermask coverage? Perhaps the spray
coater is not depositing a uniform coat and thin areas are being attacked.
[log in to unmask]
"Todd Rogers" <[log in to unmask]> Wrote:
|
| Technetters,
| We have been experiencing some sporadic problems with
| soldermask being
| burned off the edge of the circuits at the hot air level
| process. The
| soldermask on the knee of the trace seems to burn off and
| allows the solder
| to stick to the trace edge. We are using a chemical clean
| process prior to
| soldermask, and are spraying the soldermask on with a
| Teledyne spray
| coater. Has anyone else experienced these problems and
| what did you do to
| fix it?
|
| Todd Rogers
| PC Boards, Inc.
| [log in to unmask]
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