Ideally, you want the pad on your board to match the pad on the device, then you will have a straight column of solder. Not all vendors supply this information in their data sheets, TI has a lot of good info on their site with respect to this. Peter Flextronics Inc. _____ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of sjchar3@xxxxxxxxxxxx Sent: Wednesday, April 26, 2006 7:13 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] bga balls Group: I have a data sheet that says the solderballs are .019 nominal. Is there a rule of thumb for what pads size I should use? TIA Sam _____ Try the New Netscape Mail Today! Virtually Spam-Free | More Storage | Import Your Contact List http://mail.netscape.com