Ted You will note that in IPC-6012 that the copper purity, tensile strenght, elongation has been moved to the Special Requirements-(when specified) section in Table 4-3. If you specify, it is hoped that you put in you own numbers. The 6% was based on pyro copper and the 36 KSI was based on acid copper. Neither probably have any relevency to good/bad boards. The pyro should have a KSI of about 55 KSI and the acid copper should have a a 15% elongation as a miimum. The task group moved the requirement to the special requirements because it is a internal process control requirement and should not be used as a conformance requirement. Additionally, since ithe test requires a surface plating of 2 mils, it is probably not very representative of the hole plating at 1 mil. I encourage users to apply their own numbers if they want to specify it, and I encourage suppliers to set up there own standards to be used as a an internal process control on their copper bath as we do with Hull Cell, CVS, grain size, Knoop hardness, TOC, copper content, acid content etc. This test belongs in the process control area and not a conformance requirement. Phil Hinton *************************************************************************** * 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] * ***************************************************************************