A NOVEL WAFER CAGE FOR BETTER UNIFORMITY OF PHOSPHORUS DOPED SILICON LAYERS : EXPERIMENTAL STUDY AND MODELLING C. AZZARO, P. DUVERNEUIL et J.P. COUDERC J. Phys. IV France, 02 C2 (1991) C2-71-C2-78 DOI: 10.1051/jp4:1991208