Hi Guys, With the rapidly approaching death of Mil-S-13949 (Nov), it is presumed that IPC-4101 will become the standard for PWB laminate materials. If any laminate suppliers or board fab folks have done a comparitive breakdown of these two documents and slash sheets, it would sure save a lot of peoples a lot of time. If not, maybe this could be an output of Steve's well documented Dallas trip in Sept. Thanx Ralph Vaughan Boeing-Atlanta 770 497-5222 ################################################################ 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 ################################################################