Patent ID: 8186568

Claim:
A process for assembling two parts of an integrated electronic circuit, wherein each circuit part initially includes: an application surface constituted, in at least one zone of said surface, of a material adapted to produce a molecular bond, and at least one electrical connection portion which ends adjacent to the application surface of said circuit part, and is arranged to be facing another connection portion of the other circuit part when the two application surfaces are brought into contact while aligned with each other, wherein said process comprises: /1/ assembling the two circuit parts with each other by molecular bonding of the application surfaces, such that the respective connection portions of the two circuit parts are facing each other; and /2/ heating the assembled circuit parts so as to cause a formation of an electrically conductive alloy from initial materials in the two connection portions, in order to realize an electrical connection between the two assembled circuit parts, wherein: at least one of the two initial materials of the connection portions ends adjacent to the application surface of the corresponding circuit part, with a recess relative to said surface; and the initial materials of the two connection portions are selected such that the conductive alloy formed in /2/ at least partially fills in said recess by a volumetric expansion of said alloy relative to said initial materials, establishing the electrical connection between said connection portions.