NEW MESSAGE: Hi folks, Sorry, I wasn't feeling well yesterday and did not explan myself at all - the reason I asked about baking is that we reflowed one side of a surface mount board (gold on nickel); we then stored it in a 45'C oven as we were expecting the remaining parts to arrive for this very urgent job. They unexpectedly took a week. They even more unexpectedly didn't want to reflow properly when we tried reflowing. I suggested "passivation" as something for the person who brought me the problem to think about, though I must confess that being an industrial placement student, I am not best equiped to make that kind of judgement. As I try to follow many of your TN discussions, and occasionally add when I feel able, I was sure you'd be able to give better reasons as to the cause and suggestions for either prevention or cure. Thanks and Regards, Richard Tilbrook PREVIOUS MESSAGE: Hi technetters, I'm hoping to find out a bit more about the effect of baking (at 45 deg. C) on boards with gold on nickel. I would be grateful for any info on the sibject, including times, temperatures and effects, such as passivation. Thanks, Richard TIlbrook ############################################################## 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 ##############################################################