Good morning David, I don't know the answer to your question but I did post it on the trainer net. Good luck and have a save and happy holiday. Nancy T >>> [log in to unmask] 05/25/00 04:56PM >>> I was hoping to get some help from you IPC standards experts out there. I was looking for the IPC standard that is violated when copper is exposed on a gold finger card edge connector. The copper that I am seeing is a result of a chamfer that cuts an internal layer of the PCB. The spec is for .035 material removed along gold finger and .020 removed in the PCB's thickness. I expect analysis will prove that this spec is being violated. I know that exposed copper is a violation but I cannot find a standard that proves this in this scenario. On a similar note, when ordinary gold fingers are made correctly and have a chamfer, copper is exposed when the chamfer cuts into the gold finger plating. If this is a correct statement, why is this not a violation due to corrosion of the exposed copper? Thanks in advance David Romero ############################################################## 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 ############################################################## ############################################################## 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 ##############################################################