Hi All, I am just going through one document ,it tells PAD & VIA shadow Technology requirements (Components & Differential vias)to compensate the impedance difference for high speed serial link(PCIe,SAS,SATA). Need more details on this. Thanks, Sarada LSI Corp ------------------------------------------------------------------ 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: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu