Semiconductor devices are electronic components that control the flow of electrical current. They are made from materials, like silicon, that have properties between conductors and insulators. These devices are essential in modern technology, enabling functions in everything from computers to smartphones. Common types of semiconductor devices include diodes, transistors, and integrated circuits. Diodes allow current to flow in one direction, while transistors can amplify signals or act as switches. Integrated circuits combine multiple semiconductor devices into a single chip, making them crucial for compact and efficient electronic systems.