Accelerating the oxidation rate of AlN substrate through the addition of water vapor

To apply a pre-oxidation treatment on aluminum nitride (AlN) substrate is a common practice before its metallization. In the present study, the microstructure of AlN after oxidation either in dry air or in wet air is characterized. The resulting thermal conductivity is measured. With or without the...

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Published in:Journal of Asian Ceramic Societies 2017-12, Vol.5 (4), p.381-384
Main Authors: Yeh, Chun-Ting, Tuan, Wei-Hsing
Format: Article
Language:English
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Aluminum nitride
Microstructure
Oxidation
Thermal conductivity
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description To apply a pre-oxidation treatment on aluminum nitride (AlN) substrate is a common practice before its metallization. In the present study, the microstructure of AlN after oxidation either in dry air or in wet air is characterized. The resulting thermal conductivity is measured. With or without the presence of water vapor, the oxidation of AlN is a reaction-dominating process. The addition of water vapor speeds up the oxidation rate by one order of magnitude. The surface oxide layer is full of nano-sized pores. The presence of surface oxide reduces the thermal conductivity by ∼15% when the thickness of oxide layer is only 3μm.
doi_str_mv 10.1016/j.jascer.2017.08.001
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subjects Aluminum nitride
Microstructure
Oxidation
Thermal conductivity
title Accelerating the oxidation rate of AlN substrate through the addition of water vapor
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