Hi Rich! Absolutely! Is the soldermask a gloss, or matte finish? -Steve Gregory- << Good afternoon everyone.... We have been experiencing small solder balls after our wave soldering process on assemblies with bottom side SMT components. The solder balls typically accumulate between the lead of the surface mount IC's (glued SMT components and then wave soldered). The flux coverage and top side board temperature of these assemblies are within the recommend manufacturer's range. Any other parameters that would be causing solder balls on bottom side SMT assemblies? Could the pcb material finish be causing a problem? Please advise. Rich >> --------------------------------------------------------------------------------- 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 the following message: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------