Gary, Are you looking for PWB fabrication process points or PWA assembly? Looking at PWA assembly criteria, One thing you need to keep in mind is that, more copper means more heath sinking at soldering so you need to pay attention to the connections and implement proper thermal relief patterns. [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: copper thickness Author: [log in to unmask] at Dell_UNIX Date: 4/30/96 05:50 AM Would like input on the subject of 1 oz. vs. 2 oz copper thickness on inner layers. What types of end products would be affected if 1 oz. were substituted for 2 oz? What design considerations are most critical? Is it safe to say that 1 oz. vs. 2 oz. should no longer be an issue? Thank you for input. Gary Longman Electropac