Conveying devices used in a semiconductor assembly line

A conveying device for a semiconductor assembly line comprising:

• a pair of parallel workpiece guide rails which guide semiconductor workpieces in one direction from a loader side to an unloader side of said workpiece guide rails, a loader-side magazine stacker installed at one end of said pair of parallel workpiece guide rails and an unloader-side magazine stacker installed at another end of said workpiece guide rails, a pair of magazine guide rails adjacent each end of said pair of workpiece guide rails, said magazine guide rails guiding magazines, a loader side magazine adjacent said loader side magazine stacker for storing said semiconductor workpieces, said loader side magazine stacker feeding semiconductor workpieces from said loader side magazine, an unloader side magazine adjacent said unloader-side magazine stacker for receiving and storing said semiconductor workpieces, connecting means located between said pair of workpiece guide rails and said pair of magazine guide rails at each end of said pair of workpiece guide rails for causing said pair of workpiece guide rails and said pair of magazine guide rails to move together simultaneously in a direction perpendicular to a workpiece feed direction such that a distance between said pair of workpiece guide rails and a distance between said pair of magazine guide rails is maintained to be substantially the same and substantially equal to a width of said semiconductor workpiece guided on said workpiece guide rails.