I had a thought and would like comments. Flame sprayed coatings are an every-day item for industrial use. They are easy to apply and can be used to form thin or thick, adherent films on a variety of substrates. Over-spray can be easily controlled. I have also seen papers describing the very good bond between polyimides and metals when the metal is hot. Putting two and two together it seems to me than a fine flame sprayed solder alloy could be deposited onto polyimide substrate (or other substrates) in a very precise way using a micro-version of the big guns I have seen for industrial applications. It has got to be a lot easier and cleaner than selective plating. I would be a great rework tool. Has anyone out there tried this? Pat Hogue Materials and Processes Engineering (602) 561-3748 Patrick Hogue Materials and Processes Engineering Honeywell Satellite Systems Operation Glendale, AZ (602) 561-3748 [log in to unmask] ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################