Raja, Both are low loss material and for Xaui speeds and the proposed length you can use traditional FR-406=20 You don't have to use fancy materials. -Nitin -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of raja s Sent: Monday, February 25, 2008 8:38 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Difference between FR-408 (Isola)and NP 4000-13EP Hi All what is the difference between FR-408 (Isola)and NP 4000-13EP?. For lead-free assembly , signals running speed at 3.12Gbps for 10 inches long which one will be better?.=20 Regards Raja =20 ________________________________________________________________________ ____________ Never miss a thing. Make Yahoo your home page.=20 http://www.yahoo.com/r/hs ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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 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 technical documents are available at: http://www.si-list.net 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