Barbara, a good practice is to put two diagonally opposed fiducials in two corners of the footprint. But, I never needed local fiducials for the BGAs, they don't need such a perfect alignment. Ioan > -----Original Message----- > From: Barbara Burcham [SMTP:[log in to unmask]] > Sent: Wednesday, April 05, 2000 2:06 PM > To: [log in to unmask] > Subject: [TN] BGA - fiducials? > > I need information on where to put fiducials on a 256 pin, 50mil pitch > BGA, > please. > What does assembly need? > > Barbara Burcham > Fairfield Industries > > ############################################################## > 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 Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################