Patent ID: 8890276

Claim:
A three-dimensional integrated structure, comprising: a first integrated circuit including a plurality of first bump contacts formed in an insulating region of the first integrated circuit flush with a first face of the insulating region of the first integrated circuit, a second integrated circuit including a plurality of second bump contacts formed in an insulating region of the second integrated circuit, a first one of the second bump contacts flush with a first face of the insulating region of the second integrated circuit and a second one of the second bump contacts not flush with the first face of the insulating region of the second integrated circuit, wherein the two integrated circuits are mutually attached by the two first faces so that each first bump contact faces a second bump contact, said second one of the second bump contacts forming a first element and the facing first bump contact forming a second element, the first and second elements separated by a cavity, wherein the first and second elements respectively comprise two different electrically conductive materials, and a contact detection circuit configured to detect an electrical contact between the first and second elements upon a temperature rise.