HI all I am a student at the state university of new york doing my masters in electrical engineering. i had a course in signal transmission in electronics packaging. i found this mail group while trying to find some answers to signal integrity problems. one thing i found that due to the transmission of signals through vias, resonant waves are set up in the package which can interfere with other vias causing degenerate signals. one of the papers i read, written by virendra adsure suggested that applying an absorbing material to theedge of the board can bring doing the reflections. i ws wondering if there is another way around the problem. would changing the profile of the edge of the board help in a ny way. if we try and increase the resonance frequency beyond the range of considerations would it help? any suggestion would be very helpful. raseel _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. ------------------------------------------------------------------ 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 archives are viewable at: //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