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Potential of Ag Interconnect and Contact Metallization for Various Applications via Cu Additions

Published online by Cambridge University Press:  01 February 2011

Hauk Han
Affiliation:
Hauk.Han@asu.edu, Arizona State University, School of Materials, University drive and Mill, Tempe, AZ, 85287, United States, 480-965-5021
Yeongseok Zoo
Affiliation:
zooys@asu.edu, Arizona State University, School of Materials, Tempe, AZ, 85287-8706, United States
James W Mayer
Affiliation:
mayer@asu.edu, Arizona State University, School of Materials, Tempe, AZ, 85287-8706, United States
Terry L Alford
Affiliation:
ta@asu.edu, Arizona State University, School of Materials, Tempe, AZ, 85287-8706, United States
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Abstract

The thermal stability of Ag(Cu) alloy thin films on indium tin oxide (ITO) has been investigated and compared to that of pure Ag thin films on ITO. Atomic force microscopy and X-ray diffraction results of annealed films show differences in the evolution of surface morphology and texture with annealing. The presence of Cu atoms in the silver impacts the surface energy and surface diffusion. This results in Ag and Ag(Cu) alloy having very different surface morphology and crystallographic texture. The enhanced texture and thermal stability of the Ag(Cu) alloy constitute its potential use contact as material for MOSFET and for flip-chip light-emitting diodes.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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