12-06-2012, 03:35 PM
SEMINAR ON DAZZLING TALENTS
[attachment=24214]
second-generation technology has striking attributes.
Firstly, its performance is scalable. There are no known physical barriers to decreasing size by a factor of 10 and thus increasing speed by a factor of 10, using lithography to move from today's 3-μm line width to 0.3 μm. Work is ongoing to explore how far it can get by scaling simple gates to the 0.25-μm line widths of today's semiconductor processes.
Secondly, accuracy at such blinding speeds is another built-in feature of Josephson Junctions. The ac Josephson effect allows the frequency of output bits (fluxons) to be inferred from a simple measurement of voltage, where each microvolt corresponds to a data rate of 483.5 Mb/s.
Thirdly, there's circuit density. Because Josephson devices and their superconducting interconnects dissipate hardly any power, they can be very densely packed without overheating.
More important still
signals propagate virtually without dispersion. This fact, plus the pipelined architecture made possible by superconducting passive and active interconnects, removes a key obstacle to semiconductor circuits increasing clock speeds by scaling: the significant delay associated with on-chip interconnects, as identified in the 2000 Semiconductor Industry Association's International Technology Roadmap for Semiconductors.
[attachment=24214]
second-generation technology has striking attributes.
Firstly, its performance is scalable. There are no known physical barriers to decreasing size by a factor of 10 and thus increasing speed by a factor of 10, using lithography to move from today's 3-μm line width to 0.3 μm. Work is ongoing to explore how far it can get by scaling simple gates to the 0.25-μm line widths of today's semiconductor processes.
Secondly, accuracy at such blinding speeds is another built-in feature of Josephson Junctions. The ac Josephson effect allows the frequency of output bits (fluxons) to be inferred from a simple measurement of voltage, where each microvolt corresponds to a data rate of 483.5 Mb/s.
Thirdly, there's circuit density. Because Josephson devices and their superconducting interconnects dissipate hardly any power, they can be very densely packed without overheating.
More important still
signals propagate virtually without dispersion. This fact, plus the pipelined architecture made possible by superconducting passive and active interconnects, removes a key obstacle to semiconductor circuits increasing clock speeds by scaling: the significant delay associated with on-chip interconnects, as identified in the 2000 Semiconductor Industry Association's International Technology Roadmap for Semiconductors.