Dan, you didn't mention if you bake before use. I suggest you have a sample of each batch baked for at 2-4 hours at 220(F just before wave solder and re-test. You may have a moisture problem. ---------- From: [log in to unmask][SMTP:[log in to unmask]] Sent: Monday, December 09, 1996 7:41 AM To: [log in to unmask] Subject: Soldermask peeling We recently experienced soldermask peeling after wave from three different Fabricators all within 2 weeks. Subsequently we took sample lots of each Fabricator and performed a pre-wave and post-wave tape test. In all lots the boards passed pre-wave tape test but had a 10-25% failure post wave. What can cause this phenomena? Does the weather change have anything to do with soldermask application and durability? Dan Hickey Senior Buyer Vicor [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] * ***************************************************************************