PCB (Printed Circuit Board) Overview

Computer circuit boards, commonly referred to as Printed Circuit Boards or PCBs, are rigid structures that contain embedded metal traces and larger metal areas called planes, forming the electrical circuitry. Components are soldered onto metal pads on the board, which establish connections to the circuitry.

Electric circuits comprise wires and diverse components like light bulbs, transistors, computer chips, and motors. These circuits utilize conductive materials for the wires, with copper and aluminum being the most commonly used conductors. Gold is occasionally used to attach wires to small electronic chips due to its exceptional resistance to corrosion.

Paul Eisler invented the PCB in 1936 while working on a radio. PCBs are constructed using plastic or fiberglass and serve as a foundation for ICs and other components. Before the advent of circuit boards, electronic components were much bulkier, and connections were made through point-to-point wire connections, resulting in a system that was not compact, highly fragile, and costly to produce.

A prominent example of a PCB found in all modern computers is the motherboard, which is typically green due to the solder mask, but it can be found in various colors like red, blue, or black.

In desktop computers, the motherboard acts as the largest circuit board and serves as the central hub connecting and facilitating communication with all other boards and devices.

Typically, PCBs are made using non-substrate materials with multiple layers of copper circuitry. However, different types of PCBs can vary significantly in their construction. For instance, some printed circuit boards consist of only a single layer of copper circuitry, while more advanced PCBs may have 50 or more layers.

Various types of PCBs include:

~Single-sided PCBs
~Double-sided PCBs
~Multi-Layer PCBs
~Rigid PCBs
~Flex Circuits
~Rigid-Flex PCBs
~High-Frequency PCBs
~Aluminum PCBs
PCB (Printed Circuit Board) Overview