Eurotechnique

Gerard S De Ferron

Jean Marie Gaultier

A device for neutralizing the access to an integrated-circuit zone to be protected. A fuse section providing a connection between an access terminal and an integrated circuit zone to be protected is connected by means of the fuse end portion located nearest the zone to be protected to a junction obtained at the intersection of a layer of a conductivity type opposite to the conductivity type in which the substrate of the integrated circuit is formed. This junction is reverse-biased during normal utilization of the circuit and forward-biased only when it is desired to melt the fuse, thus making the zone to be protected irreversibly inaccessible.

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Greasque, France

Gerard S De Ferron