Abstract
Carbon-nanotube (CNT) field-effect transistors (CNFETs) are promising extensions to silicon CMOS. Simulations show that CNFET inverters fabricated with a perfect CNFET technology have 13 times better energy delay product compared with 32-nm silicon CMOS inverters. The following two fundamental challenges prevent the fabrication of CNFET circuits with the aforementioned advantages: 1) misaligned and mispositioned CNTs and 2) metallic CNTs. Misaligned and mispositioned CNTs can cause incorrect functionality. This paper presents a technique for designing arbitrary logic functions using CNFET circuits that are guaranteed to implement correct functions even in the presence of a large number of misaligned and mispositioned CNTs. Experimental demonstration of misaligned and mispositioned CNT-immune logic structures is also presented.
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