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To: yard_man who wrote (100692)	5/8/2001 6:00:22 PM
From: Jack of All Trades	Read Replies (1) \| Respond to of 436258

with respect to RMBS and printed circuits. They require 28ohm +/-8% impedence values on their boards to due the frequencies they are running. This drives the cost up over tradition memory which run 50ohm +/-10%, also requires a much tigher process which limits who can manufacture. Also, Rambus technology requires a test of the actual PCB, not a process coupon that many use, like your bother at Litton. PCB substrate is far behind silicon, some esitmate 11-13 years we relearn what the semi industry already figured out. In the PCB industry we are seeing more and more high speed requirements. The company I work for make testers specifically to test Rambus impedence specifications, they can also be used for any PCB substrate. Speed costs, at what pt do you see a return???