I have a PCB spec which calls out "epoxy glass laminate per MIL-P-13949".. My questions are: 1. Is this a callout for FR-4? 2. What does 13949 cover 3. If 13949 is correct, does it need additional info, such as type, to be correct. Thanks in advance for your help. ################################################################ 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 ################################################################