Two questions: 1. How much haloing on board edges and around non-plated holes is normally encountered on polyimide type boards? 2. How much board or non-plated hole edge to conductor spacing is normally required on polyimide boards to ensure that bridging of a halo does not exceed 50% of the distance? Assume 0.062 thick boards for each question. ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################