I would question the quality of the boards you are receiving from the FAB house. A 0.04" feature should never be a problem from an adhesion perspective. Either the FAB is using marginal raw material, or they are over heating the boards during the HASL process. In any case, I would question your supplier's process controls and look deeper into their procedures. Harold Papazian Manufacturing Engineering Manager Littelfuse Des Plaines, IL (847) 391-0788 [log in to unmask] <mailto:[log in to unmask]> -----Original Message----- From: Lefebvre, Scott [SMTP:[log in to unmask]] Sent: Tuesday, July 11, 2000 1:40 PM To: [log in to unmask] Subject: [TN] Missing Fiducials I have a problem with fiducials missing on our FAB's when we receive them from the vendor. It is random and not specific to any one assembly. The boards are being HASL and this is where they are coming off during fabrication. The fiducial size is 0.040" circle ½ oz. Copper. We have other board shops that we use and I haven't had this problem. Getting to the Question: The board shop in question asked if we to increase fiducial size or increase copper around fiducial. I feel that this isn't the source of the problem I don't feel that we are asking anything out of the ordinary using 0.040" fiducial. I would appreciate any suggestions in this matter. Thank you, ADC Scott Lefebvre [log in to unmask] <mailto:[log in to unmask]> ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ############################################################## ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################