Semiconductors: The Brains of Modern Electronics. When we click, swipe, type or speak to an electronic device, we expect an instant response correct to our instructions. But what is searching, quantifying, optimizing and delivering our desired results? In most cases, it's a semiconductor. The term "semiconductor" refers to a critical component of millions of electronic devices used in education, research, communications, healthcare, transportation, energy and other industries. ASML is one of the world's most important companies in semiconductor manufacturing, building the lithography machines used by all leading-edge manufacturers.