There's also "Vapor Phase Reflow" (vapour for our friends on the other side of the pond) which is - by definition - done in an inert atmosphere. Seems to have fallen out of favor, haven't seen anybody doing it for a while now. -Denny --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .