System and method for determining positions of structures on...

Optics: measuring and testing – By light interference – For dimensional measurement

Reexamination Certificate

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C340S626000

Reexamination Certificate

active

07978340

ABSTRACT:
A system and a method for determining positions of structures on a substrate are disclosed. The system includes at least one measurement table (20) movable in the X-coordinate direction and in the Y-coordinate direction, a measurement objective (9) and a camera for determining the positions of the structures (3) on the substrate (2). The position of the measurement objective (9) and/or the measurement table (20) may be determined by at least one interferometer (24). The system is surrounded by a housing representing a climatic chamber (50) provided with an active pressure regulation.

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