Skin effect mitigation in laser processed multi-walled carbon nanotube/copper conductors

Keramatnejad Keramatnejad (1) , Yun Shen Zhou (1) , Yang Gao (1) , Hossein Rabiee Golgir (1) , Mengxiao Wang (1) , Li Jia Jiang (2) , Jean-François Silvain (3) , Yong Feng Lu (1)

1 Department of Electrical Engineering
2 School of Mechanical Engineering
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

In this study, laser-processed multi-walled carbon nanotube (MWCNT)/Cu conductors are introduced as potential passive components to mitigate the skin effect of Cu at high frequencies (0–10 MHz). Suppressed skin effect is observed in the MWCNT/Cu conductors compared to primitive Cu. At an AC frequency of 10 MHz, a maximum AC resistance reduction of 94% was observed in a MWCNT/Cu conductor after being irradiated at a laser power density of 189 W/cm2. The reduced skin effect in the MWCNT/Cu conductors is ascribed to the presence of MWCNT channels which are insensitive to AC frequencies. The laser irradiation process is observed to play a crucial role in reducing contact resistance at the MWCNT-Cu interfaces, removing impurities in MWCNTs, and densifying MWCNT films.

Domaines: Matériaux

Keramatnejad Keramatnejad, Yun Shen Zhou, Yang Gao, Hossein Rabiee Golgir, Mengxiao Wang, et al.. Skin effect mitigation in laser processed multi-walled carbon nanotube/copper conductors. Journal of Applied Physics, 2015, 118 (15), 154311 (5 p.). ⟨10.1063/1.4934255⟩. ⟨hal-01232384⟩