Wedge voids can be caused by surfactant sipping into interlayer gap when the interlayer adhesion is poor. Associated with wedge voids are usually pink rings. Can somebody tell me if DM can help preventing wedge void (and also pink ring), and if so, why? ______________________________ Reply Separator _________________________________ Subject: Mechanism of Wedge Void Formation Author: [log in to unmask] at corp Date: 7/14/97 3:56 PM What is the mechanism of wedge void formation and how is it to be stopped? We use electroless copper. I heard there was less frequency with direct metallization. Does anyone know? Are there multiple causes and mechanisms? What are the frequencies of appearance? Does anyone know quantifiable kinetics of acid copper plating on different surfaces? [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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 subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * ***************************************************************************