Patent ID: 8475612

Claim:
A method for bonding a first wafer on a second wafer by molecular adhesion, the wafers having an initial radial misalignment between them, which method comprises: calculating a predefined bonding curvature as a function of the initial radial misalignment; and bringing the two wafers into contact so as to initiate the propagation of a bonding wave between the two wafers, wherein the predefined bonding curvature is imposed on at least one of the two wafers during the contacting step, and wherein calculating the predefined bonding curvature further comprises: measuring the initial radial misalignment between the two wafers to be compensated; measuring the curvature of each wafer before bonding; determining a compensation radial misalignment in dependence at least in part on the initial radial misalignment between the two wafers; calculating a post-bonding curvature capable of generating the determined compensating radial misalignment between the two wafers; and calculating the predefined bonding curvature in dependence at least in part on the calculated post-bonding curvature and the measured curvatures of each wafer.