What is a Printed Circuit Board (PCB)? - Sqpcb
A Printed Circuit Board (PCB) is a foundational component in virtually all modern electronic devices, providing the essential infrastructure for electrical connections among various electronic components. PCBs have revolutionized the electronics industry by enabling the miniaturization, reliability, and mass production of electronic circuits. This article delves into what PCBs are, their structure, types, manufacturing process, and their diverse applications. Structure of a PCB A typical PCB consists of several layers, each serving a specific function: 1. Substrate The substrate, often made from fiberglass-reinforced epoxy resin (FR4), provides the mechanical backbone of the PCB. It ensures structural integrity and support for the entire board. 2. Copper Layer Copper layers are laminated onto the substrate. These layers form the conductive pathways (traces) that connect different components on the PCB. Depending on the complexity of the circuit, a PCB can have one (single-sided), two