I currently fab 6" round probe cards using 12 ly cynate ester and 1 oz copper. I need to minimize my deflection to withstand 25 lb force exerted from 800+ pins. What laminate material and copper wt would be recommended to reinforce my .125" thick PC cards? Must be mid-range cost. , Mike Guenther [log in to unmask] Stafford, Texas ################################################################ 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 ################################################################