Has anyone got any information on z-axis expansion comparisons on boards with non-functional pads versus typical boards which do not have non-functional pads. We have a customer who is concerned about removing the pads from their design. Since the board is a high-layer count the pads are causing us much grief at drill by prematurely wearing the drill bits. Results of any tests that have been conducted (preferably with data) would be appreciated. David Arivett Cuplex Inc. *************************************************************************** * 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. * ***************************************************************************