Temperature‐dependent analysis of crosstalk and delay uncertainty in multilayer graphene nanoribbon interconnects

Abstract

SummaryIn this article, we have analyzed delay uncertainty due to crosstalk in multilayer graphene nanoribbon (MLGNR) interconnects. Crosstalk is a challenging problem in deep‐sub‐micron and nanometer designs. In this work, we have analyzed the crosstalk delay with a wide variation in chip operating temperature. The mean free path is modeled as a function of temperature. Furthermore, the resistance of MLGNR interconnect system is modeled. Crosstalk delay analysis is performed for both top‐contact MLGNR and side‐contact MLGNR (SC‐MLGNR) interconnects and compared the results with that of the traditional Cu interconnects. The analysis has been carried out for different interconnect widths 11, 16, and 22 nm and lengths 10, 50, and 100 μm for three different chip operating temperatures 233, 300, and 398K. The decrease in rise/fall delay (speed up) and increase in rise/fall time delay (slow down) are modeled. Finally, the delay uncertainty is modeled for different interconnect systems. The percentage change in delay values for speed up and slow down cases are −23.4%, −29.8% and 114.4%, 161.9%, respectively, for 10μm SC‐MLGNR interconnect. It is shown that the delay uncertainty is significantly less in SC‐MLGNR interconnects and with the advancement of technology the performance is improved as compared with copper interconnects.

An Energy-Efficient Crosstalk Reduction Strategy for On-Chip Buses Using Carbon-Based Transistors and Interconnects

“…6 It is worth mentioning that the T-model can be used in the coupled MWCNT and MLGNR interconnects for investigating the crosstalk effects. 31,41,43,58,59 The general equivalent circuit model for the MWCNT and MLGNR wires is shown in Fig. 3.…”

“…It is worth pointing out that the magnetic inductance and mutual inductance are ignorable as compared to the kinetic inductance for both MWCNT and MLGNR interconnects at the global level. 28,31,41,61 Proposed Approach Using quaternary logic for transmitting signals on global wires can considerably reduce the wiring network overheads and overall power dissipation. Implementation of this strategy in binary integrated circuits can be realized by using a binary-to-quaternary (BQ) converter as driver and a quaternary-to-binary (QB) converter as receiver.…”

“…Furthermore, the required codec and converter modules are designed based on GAA-CNTFETs. The study on MWCNT and MLGNR interconnects is still ongoing in the research phase mostly at 10 nm and even larger technologies 5,34,41,42 and. 43 We chose 10 nm technology node in this paper to be compatible with the flow of the researches.…”