Hi! We use silicon conformal coating on some boards and some of these show a lack of adhesion of the coating. It peels off very easily with gently scratched. I also heard of some peeling test that could be done, can it be done with any kink of tape? The same coating on the other boards wont peel if I try to scratch it off. Can anyone shed some light on this? I tought that it would be a cleaning problem but the supplier says that they do clean it. Can the board material be the source of that problem? Thank You! JF ############################################################## 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 Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################