Printed Circuit Board (PCB) Design is a specialized skill that involves the design and layout of circuitry on a printed circuit board or PCB. PCBs are used to support and connect electronic components including resistors, capacitors, integrated circuits, and microprocessors, creating a physical connection between electronic components. PCB designers use specialized software to create the layout of the circuitry on the PCB and must understand electronic principles, the mechanics of the PCB manufacturing process, and the environmental constraints of the product in which the PCB will be used. PCB design requires careful attention to detail, and a high degree of knowledge and expertise in order to create a functional and reliable product.