This Field Guide distills the material written by Chris Mack over the past 20 years, including notes from his graduate-level lithography course at the University of Texas at Austin. It details the lithography process, image formation, imaging onto a photoresist, photoresist chemistry, and lithography control and optimization. An introduction to next-generation lithographic technologies is also included, as well as an extensive lithography glossary and a summation of salient equations critical to anyone involved in the lithography industry.