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] | | ********************************************************** | ***************** | * TechNet mail list is provided as a service by IPC using | SmartList v3.05 * | ********************************************************** | ***************** | * To unsubscribe from this list at any time, send a | message to: * | * [log in to unmask] with <subject: unsubscribe> and | no text. * | ********************************************************** | ***************** | * If you are having a problem with the IPC TechNet forum | please contact * | * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at | [log in to unmask] * | ********************************************************** | ***************** | | *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************