Patent ID: 7579268

Claim:
A method of manufacturing an integrated circuit including a first isolated chip electrically and mechanically connected via wafer bonding to a second isolated chip, wherein active faces of the chips face one another, the method comprising: forming metallic contact zones on active faces of first and second wafers such that, in the event the wafers are arranged one above the other and the active faces of the wafers are facing one another, the contact zones of the first wafer align with the contact zones of the second wafer; positioning and fixing at a first distance the first and second wafers one above the other with the active faces of the wafers facing one another and with the contact zones of the wafers aligned; placing the positioned and fixed first and second wafers into a bath for electrolessly depositing metal onto the contact zones; applying a seed layer on the metallic contact zones prior to placing the positioned and fixed first and second wafers in the electroless deposition bath and subsequent to positioning and fixing the first and second wafers one above the other; removing the positioned and fixed first and second wafers from the bath in the event metal layers growing on the aligned contact zones have grown together, thereby mechanically and electrically connecting at least one pair of chips of the first and second wafers; and isolating the at least one pair of electrically and mechanically connected chips from the wafers.