John, In reply to your message attached: Every one of our pwa's are required to have a minimum of 2 fiducials. In addition to those we have 1 fiducial in the center of each fine pitch device. We have had no problem using the fiducial in the center of the fine pitch device as the main mark and the next closest fiducial on the pwa as the sub mark. ( Fuji placement equipment terminology ) Good Luck Dan Shea Sr. Mfg. Eng. Foxboro Co. --- Begin Included Message --- From: [log in to unmask] Date: Mon, 14 Oct 1996 09:11:33 -0500 Subject: ASSY: Fiducials To: [log in to unmask] Address, From past design reviews we have always used 2 fiducials per 15mil and 20mil SMT devices (my opinion, standard). Recently our designers are placing 1 fiducial in the center of the device location. I'm not an agreement with this change due to possible lead skew on pads and similar problems. Has visual P&P equipment changed such, that 2 fiducials are no longer required or none at all. Please advise. John Gulley *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** --- End Included Message --- *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************