Impact of Interconnect Spacing on Crosstalk for Multi-layered Graphene Nanoribbon

Abstract

In the recent research world, the overall system performance primarily depends on interconnect delay instead of the gate delay at the nanoscale regime. The impact of spacing between the lines and shrinking technology are rigorously investigated on peak noise and delay under the crosstalk for rough-edged multi-layered graphene nanoribbon (MLGNR) at global lengths. Using a rough-edged MLGNR, a multi-conductor transmission line (MTL) model is accurately demonstrated by considering the effect of coupling capacitance and inter-layer tunnelling conductance. By incorporating lengths and spacing between the coupled MLGNR interconnect, the equivalent electrical model exhibits an insignificant error of 0.91% only. Moreover, the proposed equivalent model is used to demonstrate the delay under the influence of crosstalk and peak noise for coupled interconnect lines. Using industry standard HSPICE, the overall delay and peak noise under the crosstalk are reduced by 45.1% and 9%, respectively at advanced 14 nm technology in comparison to the 32 nm for a fixed layer of rough-edged MLGNR based global VLSI interconnects.

Keywords:

• Crosstalk induced delay
• Equivalent single-conductor (ESC)
• Multi-conductor transmission line (MTL)
• Multi-layer graphene nanoribbon (MLGNR)
• Peak noise

Additional information

Notes on contributors

Vijay Rao Kumbhare

Vijay Rao Kumbhare received the BTech degree in electronics & telecommunication engineering from National Institute of Technology, Raipur, in 2008, and M.Tech degree from Indian Institute of Technology, Kharagpur, in 2011. He is currently working toward the PhD degree from DSPM IIIT Naya Raipur, India. His current research interest are in the area of graphene nanoribbon and optical based VLSI interconnects, nonlinear photonics crystal logic devices.

Punya Prasanna Paltani

Punya Prasanna Paltani received his PhD from BIT-MERSA, Ranchi, India. Currently, he is an assistant professor of physics in humanities & social science discipline, DSPM IIIT Naya Raipur. He was awarded with CSIR Fellowship for doctoral research and TUBITAK Fellowship for post-doctoral research (by TURKISH Govt.). He has published over 31 journals and conference papers; filed 3 Indian patents, and authored a book on the topic ‘Optical Beam Propagation in Nonlinear Media and All-optical Devices’. His current research interests include the area of nonlinear optics, and photonic crystal. Email: [email protected]

Manoj Kumar Majumder

Manoj Kumar Majumder received his PhD from microelectronics and VLSI group at Indian Institute of Technology, Roorkee, India. Currently, he is working as assistant professor in Department of Electronics and Communication Engineering, DSPM IIIT Naya Raipur. He has authored more than 25 papers in peer-reviewed international journals and more than 40 papers in international conferences. He has co-authored a book titled “Carbon Nanotube Based VLSI Interconnects-Analysis and Design” (New York, NY, USA: Springer, 2014) and also a book-chapter published by CRC Press. His current research interests include the area of graphene based low power VLSI devices and circuits, on-chip VLSI interconnects, emerging devices, 3D ICs and through silicon vias. Email: [email protected]