Patent ID: 8367454

Claim:
A method for forming image capture units, comprising the steps of: forming, at a first surface of a first wafer, image sensors taking up active areas separated by separation areas, and forming conductive passages associated with each active area extending down to a given depth under the first surface of the first wafer; forming, at a first surface of a second wafer, blind cavities surrounded with walls corresponding to said separation areas; bonding said first surfaces of the first and second wafers against each other by putting said separation areas in correspondence with said walls; abrading the first wafer from its second surface to reach the conductive passages; abrading, after the bonding, the second wafer from its second surface to open the bottom of the cavities; gluing on the walls a plate comprising lenses having surfaces corresponding to said active areas; and cutting the resulting structure at the level of the walls to isolate image capture units.