Abstract: A cassette adapter which makes it possible for a second cassette which accommodates a circular wafer of a diameter of 200 mm to be used on a load port ready for a first cassette which accommodates a different circular wafer of another diameter of 300 mm is locked to the load port by an adapter main body locking apparatus. The locking apparatus includes a locking air cylinder serving as a locking member for locking the first cassette to a carrier base of the load port, and a locking target member provided integrally on a rear face of an adapter plate of the cassette adapter for disengageably engaging with a locking pawl at an end of a rod of the air cylinder. A seating sensor mechanism detects that the second cassette is seated at a correct position on the adapter plate.

Abstract: There is provided a device capable of effectively increasing the number of wafers that is conveyed inside a wafer transport chamber and capable of improving the wafer conveyance processing capacity if an EFEM is used, without leading to a marked increase in installation area. A load port includes: a plurality of levels of loading tables are provided in the height direction; and wafers housed inside FOUP on top of each loading table is inserted into and removed from inside wafer transport chambers, in a state wherein each loading table is arranged at a wafer insertion/removal position on the front surface of the wafer transport chambers. The loading tables includes a transport mechanism that moves wafers forward and back in the front/rear direction, between a FOUP passing/receiving position at which the FOUP are handed over to a FOUP transport device and the wafer insertion/removal position.

Abstract: A cassette adapter which makes it possible for a second cassette which accommodates a circular wafer of a diameter of 200 mm to be used on a load port ready for a first cassette which accommodates a different circular wafer of another diameter of 300 mm is locked to the load port by an adapter main body locking apparatus. The locking apparatus includes a locking air cylinder serving as a locking member for locking the first cassette to a carrier base of the load port, and a locking target member provided integrally on a rear face of an adapter plate of the cassette adapter for disengageably engaging with a locking pawl at an end of a rod of the air cylinder. A seating sensor mechanism detects that the second cassette is seated at a correct position on the adapter plate.