Please bear with me on this one...... I have a 12 layer PWB(Backplane) with 8 ground planes(all 2 oz.). Each connector on this assembly has several pins that connect to all 8 ground planes. Each connection is thermally relieved by 4 separate .010" traces(spoked). Each trace is .035" in length. The connectors that are on the top layer have been successfully flowsoldered, but I have several on the rear layer that require handsoldering. I am concerned for the handsoldered connections and any repair required to the top connectors following flowsolder. Does anyone have experience with this type of design and/or are there any guidelines that might help me in reevaluating this design. Thanks in advance. Harlan [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. * ***************************************************************************