This lecture covers the fundamentals of polymer synthesis, including step polymerization and radical chain polymerization. It discusses important reactions, molecular weight control strategies, and the influence of molecular weight on polymer properties. Various copolymerization methods and crosslinked polymers for microengineering are also explored. The lecture delves into the application of SU-8 photoresist in lithographic fabrication and soft lithography techniques for micro- and nanofabrication.