Deactivation of integrated circuits

H - Electricity – 01 – L

Patent

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Details

H01L 23/00 (2006.01) G01V 99/00 (2009.01) G01V 15/00 (2006.01) G11C 16/10 (2006.01) H04B 1/59 (2006.01)

Patent

CA 2745260

Integrated circuits and methods of permanently disabling integrated circuits are disclosed. An integrated circuit having an erasable non-volatile memory adapted to store an activation code and logic to dis-able the integrated circuit when the code in the erasable non- volatile memory has been altered or erased after it has been separated from a sub- strate, is placed into an electromagnetic field of sufficient power to erase or reprogram the erasable non-volatile memory. The entire integrated cir-cuit is permanently disabled by erasing, altering, or reprogramming the erasable non-volatile memory. In preferred embodiments, the integrated circuit comprises a non-erasable non-volatile memory storing the activa-tion code, and circuitry adapted to permanently disable the integrated cir-cuit when the code in the erasable non-volatile memory does not match the activation code in the non-erasable non-volatile memory. Erasing, al- tering, or reprogramming the erasable non-volatile memory results in a mismatch of the non-volatile memories, which permanently deactivates the integrated circuit.

L'invention concerne des circuits intégrés et des procédés pour désactiver de manière permanente des circuits intégrés. Un circuit intégré ayant une mémoire non volatile effaçable conçue pour stocker un code d'activation et une logique pour désactiver le circuit intégré lorsque le code dans la mémoire non volatile effaçable a été modifié ou effacé après avoir été séparé d'un substrat, est placé dans un champ électromagnétique de puissance suffisante pour effacer ou reprogrammer la mémoire non volatile effaçable. Le circuit intégré entier est désactivé de manière permanente par l'effacement, la modification ou la reprogrammation de la mémoire non volatile effaçable. Dans des modes de réalisation préférés, le circuit intégré comprend une mémoire non volatile non effaçable stockant le code d'activation, et une circuiterie conçue pour désactiver de manière permanente le circuit intégré lorsque le code dans la mémoire non volatile effaçable ne correspond pas au code d'activation dans la mémoire non volatile non effaçable. L'effacement, la modification ou la reprogrammation de la mémoire non volatile effaçable aboutit à une incompatibilité des mémoires non volatiles, ce qui désactive de manière permanente le circuit intégré.

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