Introduction to Photopolymerization and Soft Lithography

Microfabrication and polymer engineering power modern technology, from semiconductor chips to biomedical devices. Understanding how light interacts with polymers to create precise microstructures is a fundamental skill for aspiring chemical engineers, materials scientists, and nanotechnology enthusiasts. This text-based course guides you through the core scientific principles of photopolymerization and soft lithography without requiring prior laboratory access. You will transition from understanding basic molecular reactions to conceptualizing complex micro-scale patterns. By studying the chemical mechanisms, material selection, and processing steps, you will build a strong theoretical foundation in modern polymer patterning techniques. What you'll learn: - Understand the core chemical mechanisms of photopolymerization, including photoinitiators and monomers. - Learn the step-by-step process of photolithography, from substrate preparation to exposure and development. - Master the principles of soft lithography, including elastomeric mold fabrication with PDMS. - Explore material selection criteria for photoresists and polymeric substrates. - Analyze the role of exposure wavelength, light intensity, and curing time on pattern resolution. - Examine modern applications of patterned polymers in microfluidics and flexible electronics. This course begins with essential terminology, chemical structures, and foundational concepts of polymer science. You will then progress through detailed written explanations of lithographic processes, equipment functions, and troubleshooting common fabrication defects. This course is designed for beginners, students, and curious self-learners looking for a comprehensive introduction to polymer engineering and microfabrication. No prior laboratory experience or advanced chemistry background is required. Start reading today to unlock the principles of micro-scale polymer engineering.