In message <[log in to unmask]> [log in to unmask] writes: > TechNetters, > My problem starts with scratches on gold fingers, but during the > replating repair procedure some parts (BGAs & or QFPs) are damaged by the > voltage used during the process. Every possible way is being made to isolate > these parts and to prevent them from being damaged, however it is not > entirely effective. What other in-house repair process is there that I can > use that is not destructive to the components already mounted? I would > appreciate any help or information you can give me. > > Thanks... Dale Marcum > > Sr. Quality Engineer > Vitel Technologies, Inc. 1) There are a number of ways of bussing across the gold fingers to "contain" the plating voltage, including temporarily soldering a wire across the extreme inbound edges. I think they are all described in IPC-7721. If you have tried all these, then... 2) You could try replacing the complete finger instead of replating a scratched one. Replacement fingers are available which have a gold finish and are mounted in place with an integral dry film epoxy. Again, it is a standard IPC-7721 process. These parts are available from several vendors - we supply the ones from Circuit Technology in MA, USA. Peter -- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Peter Swanson Oxfordshire, England INTERTRONICS [log in to unmask] http://www.intertronics.co.uk Suppliers of materials and consumables to the electronics & related industries ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ############################################################## 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 ##############################################################