Cold CMOS as a Power-Performance-Reliability Booster for Advanced FinFETs
Cold CMOS as a Power-Performance-Reliability Booster for Advanced FinFETs
复制标题
冷 CMOS 作为高级 FinFET 的功耗、性能和可靠性增强器
DOI:
10.1109/vlsitechnology18217.2020.9265065
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
J. Cai
中科院分区:
文献类型:
--
作者:
H. Chiang;T. C. Chen;J. F. Wang;S. Mukhopadhyay;W. K. Lee;C. Chen;W. Khwa;B. Pulicherla;P. Liao;K. Su;K. F. Yu;T. Wang;H. P. Wong;C. Diaz;J. Cai
We present advanced FinFET characterization and circuit analysis at reduced temperatures down to 77 K. Steepened subthreshold slope enables threshold voltage $(V_{\mathrm{TH}})$ and supply voltage $(V_{\mathrm{DD}})$ scaling for $\sim 0.27\times$ power reduction without sacrificing logic switching speed. With simultaneous $V_{\mathrm{TH}}$ scaling, SRAM can operate at the same low $V_{\mathrm{DD}}$ of 0 4V. Improved gate dielectric reliability raises maximum $V_{\mathrm{DE}}$ for $gt; 70\%$ speed boost when single thread performance is needed. Taking advantage of lower Cu wire resistance at 77 K, the repeaters for global signal propagation can be redesigned for 80% energy reduction. Increased thermal conductivity of silicon at low temperature reduces self-heating and further improves power efficiency. When refrigeration power is included, net power reduction can be achieved when cooling efficiency exceeds $\sim$ 50% of Carnot limit. We present effective $V_{\mathrm{TH}}$ reduction methods for both nFET and pFET, critical for attaining high performance for cold CMOS.