Effects of Annealing in Air on Structure and Properties of Al Films Prepared by Thermal Evaporation

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Abstract:

Al films were prepared on quartz substrates by thermal evaporation. The effects of annealing in air on structure and optical and electrical properties have been studied. It is found that the annealing in air will affect on structure and morphology of the films, which results in the difference in the optical and electrical properties. The as-deposited film is amorphous, the films annealed at 200 and 400oC are polycrystalline. After annealed at 600oC, the film was oxidized and changed to porous γ-Al2O3. The film annealed at 200 oC has the maximum reflectance and at 400 oC has the minimum resistivity in all samples. While for the film annealed at 600 oC, the resistivity is close to be infinite, the reflectance is the minimum at wavelength ranging from 400 to 800 nm in all the samples.

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Advanced Materials Research (Volumes 634-638)

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2458-2461

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January 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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