Abstract
We report a study of the crystal structure and microstructure of sputtered non-stoichiometric ZnO x thin films for which 0.7 < x < 1. A substrate r.f. discharge was used to control film stoichiometry during deposition. All films had a columnar microstructure, and the film surface progressed from rough to smooth with increased oxidation. X-ray diffraction analysis detected no presence of crystalline zinc in any film. The crystallite size, strain and orientation of ZnO, detected in all films, was dependent on film composition and substrate r.f. discharge power. A model of film structure incorporating the competing effects of ion bombardment (causing amorphization) and increased oxygen content (creating improved crystallinity and orientation) is used to explain the observed variation of ZnO x crystal structure.
Similar content being viewed by others
References
K. L. Chopra, S. Major andD. K. Pandya,Thin Solid Films 102 (1983) 1.
M. J. Brett, R. W. McMahon, J. Affinito andR. R. Parsons,J. Vac. Sci. Technol. Al (1983) 352.
D. J. Leary, J. O. Barnes andA. G. Jordan,J. Electrochem. Soc. 129 (1982) 1382.
T. Mitsuyu, O. Yamazaki, K. Ohji andK. Wash,Ferroelectrics 42 (1982) 233.
M. J. Brett andR. R. Parsons,J. Vac. Sci. Technot. A4 (1986) 423.
Idem, Can. J. Phys. 63 (1985) 819.
S. Maniv, W. Westwood andE. Columbini,J. Vac. Sci. Technol. 20 (1982) 162.
C. Gawlak andC. Aita,ibid. A1 (1983) 415.
E. Kay,ibid. A4 (1986) 462.
F. Sarrot, Z. Iqbal andS. Veprek,Solid State Commun. 42 (1982) 465.
J. Affinito, N. Fortier andR. R. Parsons,J. Vac. Sci. Technol. A2 (1984) 316.
B. Cullity, “Elements of X-ray Diffraction” Addison-Wesley, London, 1959) p. 99.
A. F. Hebard andS. Nakahara,Appl. Phys. Lett. 41 (1982) 1130.
S. Nakahara andA. F. Hebard,Thin Solid Films 102 (1983) 345.
J. A. Thornton,ibid. 40 (1977) 335.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Brett, M.J., Parsons, R.R. Structural properties of non-stoichiometric zinc oxide films. J Mater Sci 22, 3611–3614 (1987). https://doi.org/10.1007/BF01161468
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01161468