Abstract:
A shuttle assembly for controlling automatically a level of a shuttle in a wafer cassette load port of a semiconductor fabrication apparatus and an operating method of the same are provided to control automatically the level of the shuttle by using a digital leveler, a fine driver, and a controller. A wafer cassette is loaded into a shuttle(100). A digital leveler(106) is installed on a surface of the shuttle. A body(108) is coupled with the shuttle and includes a fine driver(110) for performing a horizontal leveling operation of the shuttle and a controller(114) connected with the digital leveler in order to control finely the fine driver. A level of the shuttle is controlled automatically by using the digital leveler, the fine driver, and the controller.