Contact lithography, also known as contact printing, is a form of photolithography whereby the image to be printed is obtained by illumination of a photomask in direct contact with a substrate coated with an imaging photoresist layer.
Read more about Contact Lithography: History, Operating Principle, Types of Contact Masks, Resolution Enhancements, Defect and Contamination Issues
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—Harriot K. Hunt (1805–1875)