Surface preparation has a significant impact on Soldermask adhesion.If you are using a microetch pre-clean check your anti-tarnish tank for algae or organic scum sticking to the sides. If so ,try a weekly flush out with bleach and sodium hydroxide. Also, a short vacuum bake after clean and prior to masking may help also. [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Soldermask peeling Author: [log in to unmask] at CCGATE Date: 12/9/96 5:40 AM 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] * ***************************************************************************