Abstract
Closed-form expressions for the optimized number and size of repeaters in multi-walled carbon nanotube (MWCNT) interconnects are presented. The contact resistance and inductive effects are taken into account. It is found that the propagation delay of MWCNT interconnects can be reduced effectively by inserting repeaters. However, the contact resistance has a significant influence on the optimized number and size of repeaters. Moreover, it is found that both the optimal number of repeaters and the minimum propagation delay are kept almost unchanged with the variation of carbon nanotube (CNT) kinetic inductance. The optimal number of repeaters in the MWCNT interconnect is much smaller than that in its Cu counterpart, thus saving chip area and power consumption.
Highlights
As the feature size of complementary metal-oxide semiconductor (CMOS)-integrated circuits continues to shrink, the interconnect dimensions are scaled down, which increases the electron scatterings at the surface and grain boundaries
The total propagation delay of the multi-walled carbon nanotube (MWCNT) interconnects can be written as Ttotal = kTf · F
A contact resistance Rc of 10 kΩ is considered in the case of MWCNT 2
Summary
As the feature size of complementary metal-oxide semiconductor (CMOS)-integrated circuits continues to shrink, the interconnect dimensions are scaled down, which increases the electron scatterings at the surface and grain boundaries. The impact of contact resistance on optimal repeater insertion was studied for overestimated electrical performance. The impact of contact resistance on optimal repeater insertion a was monolayer an SWCNT bundle, and MWCNT [23]. It was in demonstrated studied SWCNT, for a monolayer. Closed-form expressions for the optimized repeater size and number size and number are desirable for MWCNT with the considerations of inductive contact are desirable for MWCNT interconnects with theinterconnects considerations of contact resistance and resistance andisinductive effects,behind which this is the motivation behind this study. Based the resistance-inductance-capacitance model, this study focusesand on the impacts of of contacton resistance on the optimal repeater size (RLC). Based on the proposed closed-form expressions, repeater insertion in MWCNT interconnects is investigated in expressions, Section 4.
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