Patent ID: 8529715

Claim:
A method of attaching substrates comprising: providing an apparatus including first and second chambers mounted on a main frame to form a sealed attaching space therebetween, and an alignment control device including a body having a first side thereof facing the first chamber and a second side thereof facing the second chamber, and a fixation device that movably couples the body to the second chamber such that the body is slideable relative to the second chamber while the fixation device remains fixed relative to the second chamber, a main seal provided between the first side of the body and the first chamber, and an auxiliary seal provided between the second side of the body and the second chamber; determining an amount of compression of the main seal at a plurality of locations around a periphery of the first chamber and the second chamber after the first chamber and the second chamber have been brought together to form a sealed attaching space; and adjusting a compression amount of the auxiliary seal to adjust a gap between the first chamber and the second chamber.