Scanning kelvin-probe characterization of heavy metal contamination in patterned SIMOX wafersS. Nakamura, H. Ikeda, D. Watanabe, M. Suhara and T. OkumuraEur. Phys. J. Appl. Phys., 27 1-3 (2004) 491-493DOI: https://doi.org/10.1051/epjap:2004054