The square pads will give you better release of the paste, also the square pads will help you see if the bga has reflowed properly when you x-ray them. -----Original Message----- From: Larry Jindra [mailto:[log in to unmask]] Sent: February 2, 2000 10:34 AM To: [log in to unmask] Subject: [TN] MiniBGA pad conflicts I'm a little confused. J-STD-013 recommends 22 mil pads for 1.00mm pitch BGAs, but the guideline for IPC7527 suggests 15 mil round pads with a square paste opening. Is anyone out there having good luck with one or the other? Why the large disparity? Thanks- > Larry Jindra > TRW/Avionics Systems Division > mailto:[log in to unmask] ph (858) 592-3424 fax (858) 592-3606 > ############################################################## 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 ############################################################## ############################################################## 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 ##############################################################