Patent ID: 7674083

Claim:
An opening/closing mechanism arranged in a substrate processing device, which detaches a lid from a main body of a SMIF type clean box including the main body and the lid on which the substrate is loaded, so as to execute the processing on the substrate processing device, and detachably attaches the lid which is located at a bottom portion of the main body, to an opening provided at the bottom portion of the main body, wherein the lid of the clean box includes a cam plate and a latch member that moves to protrude from the lid and to be drawn into the lid, by a rotation of the cam plate, and the main body includes a latch hole for receiving the latch member protruding from the lid so as to lock the lid to the main body, and the opening/closing mechanism includes a port door on which the lid of the clean box is mounted, a raising/lowering device which executes the raising/lowering of the port door and includes a rotating shaft having a latch pin for rotating the cam plate and having a protrusion fittingly inserted into a non-circular shaped receiving hole provided onto the lid, and the latch pin is located at a position displaced from the protrusion and wherein the protrusion at the rotating shaft is inserted into the non-circular shaped receiving hole, the port door and the lid are coupled therewith by rotating the rotating shaft to engage the protrusion with the non-circular shaped receiving hole and thereby the raising/lowering device exerts a down force onto the lid, the lid of the clean box mounted on and coupled with the port door is vertically lowered to be detached from the main body by vertically lowering the port door by the raising/lowering device, and the substrate loaded onto the lid is lowered at a predetermined height to be processed.