Patent ID: 7637707

Claim:
A system comprising: a first processing station including a first docking station, a first frame, a first plurality of cassette storage shelves, and a first cassette mover mounted on the first frame to carry a cassette between the first plurality of shelves and the first docking station; a second processing station including a second docking station, a second frame, a second plurality of cassette storage shelves, and a second cassette mover mounted on the second frame to carry a cassette between the second plurality of shelves and the second docking station; and an interstation cassette mover adapted to transport a cassette between processing stations, the interstation cassette mover comprising: a first wafer cassette support and transport mechanism adapted to allow wafer cassettes to be delivered to and retrieved from at least the first processing station; a second wafer cassette support and transport mechanism adapted to allow wafer cassettes to be delivered to and retrieved from at least the second processing station; and a rotary handoff mechanism adapted to transfer a wafer cassette between the first and second wafer cassette support and transport mechanisms.