x/y = 10-12 *10^(-6)/K (Klein-Wassik: softsolder in the elektronics, or how it may be called in a non-german edition) Kett-richtung (bended fibers) 12* 10^(-6)/K (privat comunication by an sellman) Schuss-Richtung (straight fibers) 14-15 * 10^(-6)/K (privat comunication by an sellman) z = 50-70 10^(-6)/K (privat comunication by an sellman) Hope it helps Wolfgang Nuechter > ---------- > Von: MARS100[SMTP:[log in to unmask]] > Antwort an: TechNet E-Mail Forum.;MARS100 > Gesendet: Sonntag, 18. Oktober 1998 07:34 > An: [log in to unmask] > Betreff: [TN] FR4 thermal expansion > > Deso anyone has the coefficent of thermal expansion for > FR4 PCB material, in both X-Y and Z directions ? > > Thanks. > > ################################################################ > 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 > ################################################################ > ################################################################ 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 ################################################################