Metrology of bilayer photoresist processes

Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement

Reexamination Certificate

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C430S292000, C430S313000, C430S323000, C382S145000, C382S149000, C382S151000

Reexamination Certificate

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07901852

ABSTRACT:
A method for patterning a substrate is provided, which comprises (a) providing a substrate; (b) applying a first layer comprising a first photo resist to the substrate; (c) applying a second layer comprising a second photo resist over the first layer; (d) patterning the second layer; and (e) inspecting the patterned second layer with an inspection tool; wherein at least one of the first and second layers comprises a contrasting agent which increases the contrast between the first and second layers to the inspection tool.

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