Patent ID: 7864289

Claim:
An apparatus for attaching substrates, comprising: a main frame; an upper chamber mounted on an upper portion of the main frame, wherein the upper chamber is configured to receive and hold an upper substrate; a lower chamber that is movably mounted on the main frame, wherein the lower chamber is configured to receive and hold a lower substrate, and wherein the lower chamber can be brought together with the upper chamber to seal the upper and lower substrates; and a lower substrate receiving stage that is fixed on the main frame, wherein the lower substrate receiving stage includes a substrate support portion and a plurality of support legs, and wherein the lower substrate receiving stage remains stationary while the lower chamber is raised and lowered, wherein when the lower chamber is lowered, the lower substrate receiving stage lifts the lower substrate, and when the lower chamber is raised, the lower substrate receiving stage is recessed into the lower chamber such that the lower chamber receives and holds the lower substrate.