Patent ID: 7906362

Claim:
An assembly method to enable local electrical connections between zones located on a face of a first substrate and corresponding zones located on a face of a second substrate, the faces being located facing each other, at least the first substrate having a surface topography, the method comprising: forming an intermediate continuous layer comprising at least one burial layer on the face of the first substrate having the surface topography to make the first substrate compatible with molecular bonding with the face of the second substrate; establishing contact between the face of the first substrate with the face of the second substrate so that the zones located on the face of the first substrate and the corresponding zones located on the face of the second substrate face each other; and bonding the face of the first substrate and the face of the second substrate by molecular bonding, resistivity and thickness of the intermediate continuous layer being sufficient to enable formation of local electrical connections between the zones on the face of the first substrate and the zones on the face of the second substrate after the bonding.