Patent ID: 7311795

Claim:
A method for the bonding of disk-shaped substrates, the substrates comprising an essentially plane disk-shaped first substrate with a central opening and with a first bonding surface and a back surface opposite the first bonding surface, and an essentially plane disk-shaped second substrate with a central opening and with a second bonding surface to be bonded to the first bonding surface by a layer of adhesive, the method comprising the following steps: providing the first substrate and the second substrate, applying liquid adhesive to the first bonding surface or the second bonding surface or both, subsequently positioning, in a vacuum chamber, the first substrate and the second substrate with the second bonding surface facing the first bonding surface at a distance, subsequently elastically deforming the first substrate in such a way that the first bonding surface assumes a bent shape, evacuating the vacuum chamber, moving the first substrate and the second substrate towards each other and establishing contact between them at an area of contact adjacent edges of the first bonding surface and the second bonding surface, and upholding said deformation of said first substrate by mechanical means acting thereon while said contact is being established, subsequently releasing the first substrate so as to allow it to assume its essentially plane configuration in such a way that the area of contact spreads essentially to the entire first and second bonding surfaces, and raising the pressure in the vacuum chamber to atmospheric pressure.