John Chung yahoo.com> writes: > Yup the paper talks about the right temperature too. If memory serves me correctly it is 375 celcius. But it > really depends on the lead free solder material. 375 degC is about 100 degrees above what any normal component can take. You could spot weld it or ultrasound weld it just as well and likely with less thermal damage. Also rohs alloys are extremely fragile in composition. Just a touch with a soldering iron with another alloy's remains on it is enough to compromise the very delicately tuned "low" melting point of it. --=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 .