Wouldn't this be based on epsilonr? This would change based on the = distance to neighboring traces, trace height, width, et al. yes/no? Shane San Miguel=20 Product Engineer=20 Platform Memory Operations=20 Intel Corporation=20 916-356-3211 =20 =20 -----Original Message----- From: Suresh.K [mailto:sureshk@xxxxxxxxxxxxxx] Sent: Wednesday, March 26, 2003 3:10 AM To: si-list@xxxxxxxxxxxxx Subject: (no subject) Hi experts, I would like to know , Is there any calculator avilable for=20 calculation of the signal time delay percentage for different=20 pcb dielectric materials based on frequency. Thanks in advance ...... Regards, Suresh.K C-DOT,B'lore-52. ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: =20 http://www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages=20 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =20 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: http://www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu