Effects of focus lens position on pulsed laser deposition of ZnO films M. Liu, G. Sun, Z. G. Zhang, X. Q. Wei, C. S. Chen, C. S. Xue and B. Y. Man Eur. Phys. J. Appl. Phys., 34 2 (2006) 73-76 Published online: 25 May 2006 DOI: 10.1051/epjap:2006046