Sam, There are many variables associated with picking a material: 1. Dielectric Constant. 2. Frequency. 3. Edge rate. 4. Layer count. 5. Stackup. 6. Copper weight. 7. Impedance. Microstrip or stripline high speed signals. 8. Line width. 9. Rework. 10. Thermal. Do you know some of these? If so, I can suggest materials. Regards, Jerry Schwartz, CID+ IPC Advanced Certified Designer "May The Schwartz Be With You." Designer 3 Harris Corporation GCSD Voice (321)-727-5474 P.O. Box 37, MS 1/3232 Pager (321)-690-9797 Melbourne, FL 32902-0037 mailto:Jerome.Schwartz@xxxxxxxxxx http://www.harris.com -----Original Message----- From: sjcharles@xxxxxxx [mailto:sjcharles@xxxxxxx] Sent: Friday, February 18, 2005 10:42 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] high speed board material. Group: We will be doing a PCI card which will have high speed digital signals. Which type of board material (fr4,rogers...) would be ideal? TIA Sam ----------------------------------------------------------- To subscribe/unsubscribe: Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx with a subject of subscribe or unsubscribe To view the archives of this list please login at //www.freelists.org. Our list name is icu-pcb-forum or go to //www.freelists.org/archives/icu-pcb-forum/ Problems or Questions: Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx Want to post a job listing ? DON'T DO IT HERE! Better yet, join our jobs listing forum. SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx POST: icu-jobs-forum@xxxxxxxxxx ----------------------------------------------------------- ----------------------------------------------------------- To subscribe/unsubscribe: Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx with a subject of subscribe or unsubscribe To view the archives of this list please login at //www.freelists.org. Our list name is icu-pcb-forum or go to //www.freelists.org/archives/icu-pcb-forum/ Problems or Questions: Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx Want to post a job listing ? DON'T DO IT HERE! Better yet, join our jobs listing forum. SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx POST: icu-jobs-forum@xxxxxxxxxx -----------------------------------------------------------