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Why Wire Delays Will No Longer Scale for VLSI Chips
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Author(s):
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Neil C. Wilhelm
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Report Number:
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Date Published:
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Available Formats:
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TR-1995-44
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August 1995
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Portable Document Format (PDF)
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| Abstract |
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Past scaling of VLSI circuits has resulted in wire delays that scale as the square of the scale factor. This has occurred because wires have been much wider than they are thick: their aspect ratio has been (much) greater than one. For today's and future VLSI processes, the aspect ratio of wires will be very near to one, and scaling will no longer produce dramatic decreases in wire delays. Long wires will gain the least from future scaling suggesting that, more then ever, high-speed system designs will have to avoid long-distance communications.
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