Patent ID: 7845892

Claim:
A substrate-treating apparatus, comprising: a plurality of modules disposed along a first direction, each of the plurality of modules having an inner space for containing a substrate; and a transfer unit for transferring the substrate among the plurality of modules, the transfer unit including first and second tracks disposed along the first direction on a horizontal plane and first and second movable transfer chambers for moving along the first and second tracks, respectively, wherein the first and second movable transfer chambers are atmospherically isolated from an exterior while moving, wherein the first movable transfer chamber is arranged and structured to move under the second movable transfer chamber, wherein the first and second movable transfer chambers overlap with each other in plan view, wherein the first and second movable transfer chambers are adapted to move parallel with the horizontal plane along the first and second tracks, respectively, such that the first and second movable transfer chambers are connected to the plurality of modules without breaking a pressure condition.