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System and apparatus for evaluating the effectiveness of wafer drying operations

Image Number 6 for United States Patent #6611326.

Systems and apparatus for evaluating the effectiveness of wafer drying techniques are provided. The systems and apparatus include a laser or any other source configured to apply light radiation to the surface of a substrate that has been rinsed with a solution containing an analytically detectable compound prior to a drying process. Any residue of the analytically detectable compound is excited by the source, and the resulting energy is imaged with a confocal microscope or similar device to identify regions of the surface of the substrate of ineffective drying.

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