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Properties of Al2O3 films prepared by argon ion assisted deposition

Published online by Cambridge University Press:  03 March 2011

Mansour S. Al-Robaee ,
Ghanashyam M. Krishna ,
G.N. Subanna ,
Narasimha K. Rao  and
S. Mohan
Mansour S. Al-Robaee
Affiliation:
Instrumentation and Services Unit, Indian Institute of Science, Bangalore 560 012, India
Ghanashyam M. Krishna
Affiliation:
Instrumentation and Services Unit, Indian Institute of Science, Bangalore 560 012, India
G.N. Subanna
Affiliation:
Materials Research Center, Indian Institute of Science, Bangalore 560 012, India
Narasimha K. Rao
Affiliation:
Instrumentation and Services Unit, Indian Institute of Science, Bangalore 560 012, India
S. Mohan
Affiliation:
Instrumentation and Services Unit, Indian Institute of Science, Bangalore 560 012, India
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Abstract

Aluminum oxide films have been prepared by ion assisted deposition using argon ions with energy in the range 300 to 1000 eV and current density in the range 50 to 220 μA/cm2. The influence of ion energy and current density on the optical and structural properties has been investigated. The refractive index, packing density, and extinction coefficient are found to be very sensitive to the ion beam parameters and substrate temperatures. The as-deposited films were found to be amorphous and could be transformed into crystalline phase on annealing. However, the crystalline phases were different in films prepared at ambient and elevated substrate temperatures.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 10 , October 1994 , pp. 2688 - 2694
Copyright
Copyright © Materials Research Society 1994

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