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RESEARCH PAPERS: Heat Conduction

Thermal Conductivity of Thin Metallic Films

[+] Author and Article Information
Sunil Kumar, George C. Vradis

Department of Mechanical Engineering, Polytechnic University, 333 Jay Street, Brooklyn, NY 11201

J. Heat Transfer 116(1), 28-34 (Feb 01, 1994) (7 pages) doi:10.1115/1.2910879 History: Received September 01, 1992; Revised April 01, 1993; Online May 23, 2008

Abstract

This study examines the effect of transverse thickness on the in-plane thermal conductivity of single crystal, defect-free, thin metallic films. The imposed temperature gradient is along the film and the transport of thermal energy is predominantly due to free electron motion. The small size necessitates an evaluation of the Boltzmann equation of electron transport along with appropriate electron scattering boundary conditions. Simple expressions for the reduction of conductivity due to increased dominance of boundary scattering are presented and the results are compared with other simplified approaches and experimental data from the literature. Grain boundary scattering is also considered via simple arguments.

Copyright © 1994 by The American Society of Mechanical Engineers
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