Semiconductor wafer storage kiosk

A system for storing, retrieving, and transferring semiconductor wafer cassettes comprising;

• a storage enclosure formed of a plurality of identical sections, each section comprised of a vertical wall panel and a roof panel;
• a window in each vertical wall panel providing an input port;
• one or more shelves supporting semiconductor wafer cassettes mounted in said window on the exterior of said vertical wall panels;
• one or more shelves supporting semiconductor wafer cassettes mounted in said window on the interior of said vertical wall panels adjacent said one or more shelves mounted on the exterior of said wall panels;
• a pickup and transfer apparatus for picking up and transferring a semiconductor wafer cassette stored on said one or more interior shelves;
• an automatic drive mechanism on said one or more exterior shelves and one or more adjacent interior shelves for automatically advancing a semiconductor wafer cassette from an exterior shelf to an adjacent interior shelf when said pickup and transfer apparatus removes a semiconductor wafer cassette stored on one of said one or more interior shelves;
• whereby said system can efficiently store and retrieve multiple semiconductor wafer cassettes for transfer to processing stations.