Hello again! Sorry it took me two days to get back to everyone re the "Solder Flux under LCCs" problem. Just wanted to thank everyone for their help. It was much appreciated. After considerable thought, we have decided to go with the water soluble spacer idea. By the way, to answer some of your questions, the substrate we are using is a ceramic substrate, we are using a water soluble flux, and we use aqueous cleaning. As I mentioned before, this is the first time I have used IPC TechNet Forum, and it is truly a remarkable resource. Thanks again. Best regards, Paul Baine --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------