I have a question that you can hopefully help me with. Recently, our manufacturing plant reviewed one of our designs and identified several areas that contained acid trap situations. Can you give me a good definition as to what an acid trap is and what damage it could cause to a board? After I reviewed the design, I did notice quite a few areas that might be a problem. Before I fixed anything, I sent the files to the board fabricator that does our production work. They performed their normal checks and found no problems. They then reduced the criteria that they search on and again, found no problems. I need to respond to not only our manufacturing people but also to the engineers involved with this design as well as management. Any help would be appreciated. Thanks... Lou Takach Union Switch & Signal 1000 Technology Drive Pittsburgh, PA 15219 412-688-2574 [log in to unmask] ############################################################## 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 ##############################################################