| 摘要 |
A support structure for positioning an exchangeable object in a lithographic apparatus. The support structure has a chuck to support and clamp the object and an actuating structure. The actuating structure may have a first actuating structure (e.g., spring) and a second actuating structure (e.g., linear actuator). The first actuating structure is moveable relative to the chuck and is configured to move the second actuating structure between a first position in contact with a side of the object and a second position out of contact with the side of the object. The second actuating structure is configured to move at least a portion thereof relative to the first actuating structure between a first position in contact with the side of the object and a second position out of contact with the side of the object and to apply a pushing force to the side of the object.
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