> I remember that the IPC sponsored a study which concluded that breakout > was not a reliability concern, but I never actually saw the report...maybe > you can still get it from them. > > Timothy Reeves > ECD Circuit Board Division > 13626 South Freeman Road > Mulino, OR 97042 > [log in to unmask] > (503) 829-9108 (800) 228-8198 FAX (503) 829-5482 > > > > ---------- > From: Ken Patel > Sent: Tuesday, October 12, 1999 3:50 PM > Subject: Reliability due to misregistration on inner layer > > On one of our product, we have found that one of the inner layer has > misregistration. > > Do you see any quality/ long term reliability problem associated with > inner > layer misregistration? Our requirement was to have a 1 mil minimum annular > ring on all inner layers. What is the risk cum liability of accepting > those > boards knowing that they are misregistered. > > Misregistration occurred at 1mm BGA where the finished hole diameter is 9 > mil on a 20 mil pads. > > re, > ken patel > > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################