Good Morning TechNet, We have an order for a 10 layer with 3 oz copper on all layers. How much "fill" against a 3 oz signal layer should I expect? The overall is .125 and the stack up is our option. Any input would be appreciated. Anne Ledger Mfg Eng EMDS, Inc. [log in to unmask] ################################################################ 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 ################################################################