Graham A suggestion (more from my woodworking experience than cca assembly...). Could your customer do a two pass routing operation? The first pass to take off most of the waste but leave some of the unwanted edge, this would heat up the coating as you have seen, A second pass (after doing other sides and letting the area cool off) would remove much less coating and should be cooler. Hopefully it would remove any stringing that occurred in the first pass. As a long term fix, using connecting tabs and depanalization with a singulation die would avoid this problem and be faster as well. Good luck! Graham Collins Process Engineer Litton Systems Canada (902) 873-2000 extension 215 -----Original Message----- From: Graham Naisbitt [mailto:[log in to unmask]] Sent: Friday, September 11, 1998 12:12 PM To: [log in to unmask] Subject: [TN] Routing conformal coatings Hi TechNetters, I hope you can help. We have a customer who needs to route (de-panellise) his assemblies after Conformal coating. The coating is an acrylic. The problem is that when he does this routing operation, the coating (not surprisingly) goes into a state of partial melt so that the coating is stringing on the underside making a problem for clean-up which is costly. He cannot route from the other side. He has tried chilling the assembly but this is impractical because of the time constraints. He cannot selectively NOT coat the affected area because his selective coating system then takes too long for the operation. Does anyone have any suggestions? Regards, Graham Naisbitt [log in to unmask] Concoat Ltd Phone: +44 1276 691100 Alasan House Fax: +44 1276 691227 Albany Park CAMBERLEY GU15 2PL UK Any opinions expressed are those of this employer. ################################################################ 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 ################################################################