Computer Hardware
PCB
Definition
A Printed Circuit Board (PCB) is a laminated sandwich structure of conductive and insulating layers. PCBs have two complementary functions. The first is to affix electronic components in designated locations on the outer layers by means of soldering. The second is to provide reliable electrical connections between the component's terminals in a controlled manner.
Why It Matters
PCBs are the foundation of virtually all modern electronics. They provide the physical structure and the electrical connections needed to build complex circuits in a compact and reliable way.
Contextual Example
A computer motherboard is a very large and complex PCB. A graphics card, RAM stick, and even your smartphone are all built around PCBs.
Common Misunderstandings
- The green lines you see on a PCB are called "traces," and they are the copper pathways that act as wires.
- PCBs can have multiple layers to accommodate highly complex circuits in a small space.