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Dispositifs de l'Electronique Intégrée (DEI) RESUME ,
Ainsi, la dégradation et le claquage sous contrainte électrique est devenu l'un des problèmes de fiabilité les plus importants des couches minces d'oxydes. L'utilisation de techniques de caractérisation permettant de mesurer les courants de fuite avec une résolution spatiale nanométrique a montré que le phénomène de claquage des oxydes est un phénomène très localisé. Le diamètre des «points chauds», des endroits où le courant de fuite est très élevé pour une tension appliquée continue, peut-être de quelques nanomètres uniquement. Ceci illustre pourquoi les méthodes de caractérisation avec une résolution spatiale à l'échelle nanométrique peuvent fournir des informations supplémentaires par rapport à la caractérisation classique macroscopique. Il y a deux instruments, dérivés de la microscopie à force atomique (AFM) qui peuvent être utilisés pour faire ce travail, soit le Tunneling Atomic Force Microscope (TUNA) ou le Conductive Atomic Force Microscope (C-AFM). Le mode TUNA qui est utilisé dans notre travail est capable de mesurer des courants très faibles variant entre 60 fA et 100 pA. Notre travail peut être divisé en deux thèmes principaux ,
couches d'oxydes ultra-minces, SiO 2 , LaAlO 3 , Gd 2 O 3 , courant de fuite, courant tunnel, tunnel direct ,
Abdelkader SOUIFI Composition du jury, Jacques COUSTY, Didier GOGUENHEIM ,