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

Authors

K. Keramatnejad, University of Nebraska-LincolnFollow
Y. S. Zhou, University of Nebraska-LincolnFollow
Y. Gao, University of Nebraska-Lincoln
H. Rabiee Golgir, University of Nebraska-LincolnFollow
M. Wang, University of Nebraska-Lincoln
L. Jiang, Beijing Institute of Technology
J.F. Silvain, Institut de Chimie de la Matiere Condensee de Bordeaux (ICMCB-CNRS) 87, Avenue du Docteur Albert Schweitzer F-33608 Pessac Cedex, France
Yongfeng Lu, University of Nebraska-LincolnFollow

ORCID IDs

H. Rabiee Golgir

Document Type

Article

Date of this Version

2015

Citation

JOURNAL OF APPLIED PHYSICS 118, 154311 (2015)

Comments

Copyright 2015 AIP Publishing LLC

Abstract

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.