| 摘要 |
In a first aspect, a shelf module is adapted to store a plurality of substrate carriers. The shelf module includes (1) a plate; and (2) a plurality of shelves attached to the plate at respective elevations, each of the shelves being adapted to store a respective substrate carrier. Also provided are (1) an upper attachment mechanism adapted to attach an upper portion of the plate to a frame of a storage location; and (2) a lower attachment mechanism adapted to attach a lower portion of the plate to the frame of the storage location. At least one of the upper attachment mechanism and the lower attachment mechanism is adjustable so as to allow the plurality of shelves attached to the plate to be aligned to a reference as a unit.
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