INTEGRATED CIRCUIT WITH COMPLETE PROTECTION AGAINST ULTRAVIOLET RAYS

摘要

A circuit according to the invention has an interior region 1 protected from ultraviolet rays by a metal mask covering the whole of this interior region, and by metal droppages originating from this metal mask and becoming anchored on a continuous ring of an Ad diffusion, these droppages forming an Am metal ring between the plane of the substrate and the plane of the metal mask. The interior region 1 includes at least one memory cell C1, each of the control signals of which is connected to the exterior of the interior region 1 by a buried connection, by conduction in a compartment, of opposite doping to the diffusion of the Ad ring, this latter diffusion being carried out inside the compartment. ……