I'm doing some research for an EDN column about the use of surface-mounted backplane connectors as opposed to press-fit types for high-speed serial backplanes (in the GHz+ speed range). Of course the press-fit conectors have the advantage of not requiring soldering on your backplane, which means you can incorporate cheezy plastic parts into the connector shells. The surface-mounted connectors work well with very small blind vias which are good for high-speed signals. Which is best? Where are we going in the future? Any comments you would care to submit to my attention ( howiej@xxxxxxxxxx ) or post here on the si-list would be greatly appreciated. Please include the words: "backplane connector" in the subject line to make sure I see the message. Best regards, Dr. Howard Johnson, Signal Consulting Inc., tel +1 509-997-0505, howiej@xxxxxxxxxx http:\\sigcon.com -- High-Speed Digital Design articles, books, tools, and seminars ------------------------------------------------------------------ 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