Hi Ofer, Without knowing which LF-solder you talk about, no specific advise can be given. Coatings themselves are not a real problem. However, when LF-solders will be used and most LF-solders in the running require 35 to 40°C higher refllow temperatures--or reductions in belt speeds; thus, yes you need to think about process changes. Workmanship is about the same/ reliability effects have not fully determined--and will not be for some time to come. You may be interested in the upcoming conference IPC/Soldertec Global Conference on Lead Free Electronics in Brussels on June 10 and my workshop Reliability Issues for Lead-Free Soldering. Regards, Werner Engelmaier --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 -----------------------------------------------------