ACCNT—A Metallic-CNT-Tolerant Design Methodology for Carbon-Nanotube VLSI: Concepts and Experimental Demonstration

We demonstrate ACCNT (pronounced as ldquoaccentrdquo), a solution to the metallic-nanotube problem that does not require any metallic-nanotube removal of any kind. ACCNT uses asymmetrically correlated carbon nanotubes to achieve metallic-nanotube tolerance, delivering high on-off ratios (10
⁴
-10
⁶
) while preserving the current drive. In addition, this metallic-nanotube tolerance can be engineered arbitrarily close to 100%. We present the ACCNT concepts in detail, verifying the concepts and underlying assumptions via experimental results. We further demonstrate inverters using ACCNT and ACCNT scalability to a wafer scale. ACCNT marks the first demonstration of a VLSI-compatible metallic-nanotube-tolerant design methodology.