[SI-LIST] backplane connector

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

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