Patent ID: 7139066

Claim:
A combination container for holding a workpiece associated with a semiconductor fabrication process, the workpiece including an upper surface, a lower surface, and an upper edge, the container comprising: a base and a cover, the cover shaped and dimensioned to be progressively received into an engaged position with the base to define a sealed enclosure for housing the workpiece therein; at least one support structure and at least one positioning member extending from the base, the support structure configured to contact and support the lower surface of the workpiece substantially horizontally relative to the base without contacting any other portion of the workpiece, and the positioning member shaped and positioned to limit lateral displacement of the workpiece from a desired position on the at least one support structure; at least one positioning structure and at least one workpiece restraint affixed to the cover, the at least one positioning structure defining at least one sloping surface and the at least one workpiece restraint including at least one resilient arm, the positioning structure located to enable the sloping surface to correct a deviation of the workpiece from the desired position by engaging in sliding contact with the upper edge of the workpiece and slidingly urging the workpiece on the support structure towards the desired position as the cover is progressively received into the engaged position, the resilient arm arranged to exert a resilient bias on the upper surface to maintain the workpiece in the desired position within the sealed enclosure against movement relative to the at least one support structure.