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From: flower@hpcc01.HP.COM (Graham Flower)
Newsgroups: sci.electronics
Subject: Superconducting Interconnects
Message-ID: <4450005@hpcc01.HP.COM>
Date: 19 Feb 91 18:13:30 GMT
Organization: HP Corp Computing & Services
Lines: 26




     Please excuse my ignorance but I'm not sure I understand why supercondu-
     ctor interconnects are such an advantage that they justify the costs.
     A couple of possibilities occur to me:


	 1. Reduced interconnect resistivity reduces IR drops on supply
	    busses and so reduces chip area devoted to Busses.

         2. Reduced interconnect resistivity decreases ground noise.

	 3. Reduced interconnect resistivity increases signal propagation
	    speed considering the interconnect as a stripline transmission
	    line.

     Could somebody please educate me on which of these is most important or
     add the proper considerations to this list? Thanks.


______________________________________________________________________________
Graham Flower ms 90-TT               |  Better to have convictions and act on 
Hewlett-Packard  350 W Trimble Rd    |  them, even if they are wrong, than to  
Microwave Semiconductor Division     |  waffle in indecision endlessly.
San Jose, California, 95131          |