Describe how photolithography is used for production of nanostructures.

Photolithography is a widely used technique in the production of nanostructures, especially in the fabrication of semiconductor devices. It involves the transfer of patterns from a photomask to a substrate, typically a silicon wafer, through a process that uses light. The process begins with the application of a thin layer of photoresist material onto the wafer's surface. This photoresist is __________ _____ ___ _________ ___ __________ ______ ____ ________.
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