We build boards with PBGA's that see two reflow cycles. No reliability testing was done but we've yet to see a failure due to this. The board is a daughter card in a server so it doesn't see a lot of abuse. > -----Original Message----- > From: [log in to unmask] [SMTP:[log in to unmask]] > Sent: Monday, January 11, 1999 10:59 AM > To: [log in to unmask] > Subject: [TN] BGAs on both sides of a PCB > > > <Original text message attached as document> > << File: ceomail.wrd >> ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################