We propose a method to determine the indium concentrations x and y in the metamorphic structures. This approach is based on the combination of two experimental techniques: (i) reciprocal space mapping (RSM) to determine the average In composition in the InAlAs layers and (ii) transmission electron microscopy (TEM) using the intensity measurements of the chemically sensitive (002) reflection from dark-field images to determine the composition in the InGaAs quantum well. We apply this method to a metamorphic high electron mobility transistor, with x and y approximately equal to 0.35. Furthermore, we present an original and straightforward way to evaluate experimental errors in the determination of composition and strain with the RSM procedure. The influence of these errors on the TEM results is discussed. For In concentrations in the 30%–40% range, the accuracy of this simple method is about 0.5% on the In composition in the InGaAs quantum well.
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1 April 2003
Research Article|
April 01 2003
Indium content measurements in metamorphic high electron mobility transistor structures by combination of x-ray reciprocal space mapping and transmission electron microscopy
J.-M. Chauveau;
J.-M. Chauveau
Laboratoire de Structure et Propriétés de l’Etat Solide, UMR-CNRS 8008, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq Cedex, France
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Y. Androussi;
Y. Androussi
Laboratoire de Structure et Propriétés de l’Etat Solide, UMR-CNRS 8008, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq Cedex, France
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A. Lefebvre;
A. Lefebvre
Laboratoire de Structure et Propriétés de l’Etat Solide, UMR-CNRS 8008, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq Cedex, France
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J. Di Persio;
J. Di Persio
Laboratoire de Structure et Propriétés de l’Etat Solide, UMR-CNRS 8008, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq Cedex, France
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Y. Cordier
Y. Cordier
Centre de Recherche sur l’Hétéro-Epitaxie et ses Applications, CRHEA-CNRS, Avenue Bernard Gregory, Parc de Sophia Antipolis, 06560 Valbonne, France
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J. Appl. Phys. 93, 4219–4225 (2003)
Article history
Received:
October 04 2002
Accepted:
December 13 2002
Citation
J.-M. Chauveau, Y. Androussi, A. Lefebvre, J. Di Persio, Y. Cordier; Indium content measurements in metamorphic high electron mobility transistor structures by combination of x-ray reciprocal space mapping and transmission electron microscopy. J. Appl. Phys. 1 April 2003; 93 (7): 4219–4225. https://doi.org/10.1063/1.1544074
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