Optics: measuring and testing – By light interference – For dimensional measurement
Reexamination Certificate
2011-07-12
2011-07-12
Lyons, Michael A (Department: 2877)
Optics: measuring and testing
By light interference
For dimensional measurement
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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Boesser Hans-Artur
Fricke Wolfgang
Heiden Michael
Lyons Michael A
Simpson & Simpson PLLC
Vistec Semiconductor Systems GmbH
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