Hi Technetters, Can anyone help me? We are curently running some BGA'S through reflow, and on inspecting them through our Ersascope BGA inspection system have measured there is a ball drop of around 30% from original ball size. The actual ball formation looks very "border line" as in, has it single or double dropped. Does anyone know the guidlines for such a drop? Is 30% the bottom end tolerance and if so should I be looking at a drop of + 30% to insure a good looking sound joint on the BGA. Many thanks in advance, Adrian Hanks. --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------