J. Phys. III France
Volume 2, Numéro 8, August 1992
Page(s) 1373 - 1380
DOI: 10.1051/jp3:1992183
J. Phys. III France 2 (1992) 1373-1380

Limitations on AES quantitative analyses of plasma deposited ceramics

B. Cros1, R. Berjoan2, C. Monteil1, E. Gat1, N. Azema1, D. Perarnau2 and J. Durand1

1  Laboratorie de Physicochimie des Matériaux, URA 1312 CNRS, ENSCM, 8 rue de l'Ecole Normale, 34053 Montpellier Cedex 1, France
2  Institut de Science et Génie des Matériaux et Procédés, BP 5, Odeillo, 66120 Font Romeu, France

(Received 1st February, accepted 24 March 1992)

Difficulties encountered in using AES for quantitative measurements have been evaluated with three plasma deposited materials : amorphous hydrogenated silicon carbide a-Si $_{\rm x}$C $_{1-{\rm x}}$:H; amorphous hydrogenated silicon nitride a-SiN $_{\rm x}$:H; crystallized hydrogenated aluminium nitride Al $_{\rm x}$N $_{\rm y}$:H. For a-Si $_{\rm x}$C $_{1-{\rm x}}$:H, the values of composition x calculated from Peak/Background and Area/Background ratios are not very different for materials near to stoichiometry or rich in silicon. A divergence on results is noticed for a-Si $_{\rm x}$C $_{1-{\rm x}}$:H films with carbon-rich contents and for a-SiN $_{\rm x}$:H films. This is attributed to broadening effects seen on the KVV peak of carbon and on both LVV and KLL peaks of silicon. The most important problem in Al $_{\rm x}$N $_{\rm y}$ thin films quantitative Auger analysis is to find suitable reference samples. Available ones are silicon nitride and pure aluminium. The aluminium KLL Auger spectrum is characterized by surface and bulk plasmon loss peaks. Furthermore, the primary electrons efficiency and the emission yield is modified by changes in the solid matrix.

© Les Editions de Physique 1992