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Browse Journals & Magazines > Applied Physics Letters ...> Volume:93 Issue:5 Help

Epitaxial growth of aluminum nitride on AlGaN by reactive sputtering at low temperature

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8 Author(s)
Duquenne, C. ; Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France ; Djouadi, M.A. ; Tessier, P.Y. ; Jouan, P.Y.
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We report the synthesis of 1 μm thick single crystalline aluminum nitride films by dc magnetron sputtering on AlGaN/GaN layer grown on sapphire substrate at low temperature (substrate temperature ≪250 °C). The microstructure of c-axis oriented AlN films deposited on Si (100) and AlGaN <0001> substrates was studied by x-ray diffraction, selected area electron diffraction, and transmission electron microscopy. The optimization of process parameters, involving low energetic ion bombardment on film surface (20–30 eV) during the growth, leads to an increase in the surface mobility and thus promotes AlN epitaxial growth on AlGaN substrate at 250 °C.

Published in:
Applied Physics Letters  (Volume:93 ,  Issue: 5 )

Date of Publication: Aug 2008

Page(s):
052905 - 052905-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.2967816
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Aug 2008

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