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Device and Architecture Outlook for Beyond CMOS Switches

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5 Author(s)
Kerry Bernstein ; IBM T. J. Watson Research Center, Yorktown Heights, NY, USA ; Ralph K. Cavin ; Wolfgang Porod ; Alan Seabaugh
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Sooner or later, fundamental limitations destine complementary metal-oxide-semiconductor (CMOS) scaling to a conclusion. A number of unique switches have been proposed as replacements, many of which do not even use electron charge as the state variable. Instead, these nanoscale structures pass tokens in the spin, excitonic, photonic, magnetic, quantum, or even heat domains. Emergent physical behaviors and idiosyncrasies of these novel switches can complement the execution of specific algorithms or workloads by enabling quite unique architectures. Ultimately, exploiting these unusual responses will extend throughput in high-performance computing. Alternative tokens also require new transport mechanisms to replace the conventional chip wire interconnect schemes of charge-based computing. New intrinsic limits to scaling in post-CMOS technologies are likely to be bounded ultimately by thermodynamic entropy and Shannon noise.

Published in:

Proceedings of the IEEE  (Volume:98 ,  Issue: 12 )