Patent ID: 7598152

Claim:
A device for bonding first and second wafers ( 22 , 26 ) on corresponding surfaces ( 22 o , 26 o ) of the first and second wafers ( 22 , 26 ), the device having the following features: a. a unit ( 43 ) for applying a layer of bonding agent ( 44 ) to at least one of the corresponding surfaces ( 22 o , 26 o ) of the first and second wafers ( 22 , 26 ), b. a first device ( 20 ) for receiving and possibly aligning the first wafer ( 22 ), c. a second device ( 41 ) for receiving and aligning the second wafer ( 26 ) with respect to the first wafer ( 22 ), and d. a control unit ( 40 ) effecting the following process steps one after the other: i. applying a layer of bonding agent ( 44 ) to at least one of the corresponding surfaces ( 22 o , 26 o ) of the first and second wafers by means of a unit ( 43 ) for applying the bonding agent, ii. contacting the corresponding surfaces ( 22 o , 26 o ) of the first and second wafers ( 22 , 26 ) by means of the first and second devices ( 20 , 41 ), iii. aligning the second wafer ( 26 ) with respect to the first wafer ( 22 ) by aligning means along the corresponding surfaces ( 22 o , 26 o ) of the first and second wafers ( 22 , 26 ) in contact, and iv. bonding the corresponding surfaces ( 22 o , 26 o ) of the first and second wafers by curing the bonding agent ( 44 ).