Typically, we use the pitch as a reference. 0.8mm pitch = 16 mil pad 1mm pitch = 18 mil pad 1.27 mm pitch = 22 mil pad ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of sjchar3@xxxxxxxxxxxx Sent: Wednesday, April 26, 2006 10:13 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