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Printed Circuit Boards: The “Nervous System” Of Electronic Devices

WsxMall 2026-04-16 14:14:52 2 Related Key Words: Printed circuit boards: the “nervous system” of electronic devices

Printed Circuit Boards: The Nervous System of Electronic Devices

PCB is called the **nervous system** of electronic equipment. It is responsible for component fixation and signal transmission. It is an indispensable basic carrier for all electronic products.

1. Definition

Printed Circuit Board (PCB)

Form a conductive pattern on the insulating substrate to realize the connection between componentsElectrical connections and mechanical supports, is the core basic component of the modern electronics industry.

2. Structure and classification

core structure

substrate: Insulating support body (fiberglass, polyimide, ceramic, etc.)
Wire / copper foil：Signal transmission path
Components: Chips, resistors, capacitors, connectors, etc.

Classified by layer number

single panel: Only one side is wired, for simple circuits
double panel:Double-sided wiring + via hole connection, universal mainstream
multilayer board: 4 layers to 30 layers or more, high integration, high speed, high frequency scenarios

Classified by material and properties

Rigid board: High strength, not easy to deform, mainstream in mobile phones/computers/industrial control
Flexible PCB (FPC): Flexible, foldable screens, wearables, automotive wiring harnesses
Rigid-flexible board: Taking into account both rigid support and flexible connection, dedicated to high-end equipment

3. Core functions

mechanical support: Stably fixing chips, passive components, etc.
electrical interconnection:Transmit signals and power to realize circuit functions
Standardized assembly: Simplify production, welding and maintenance processes
Improve stability: Regular wiring, reducing interference and improving reliability

4. Industry trends

towardsNumber of layers, thin line width, high frequency and high speed, high reliabilitydevelop
HDI, Any-layer, IC carrier boardBecome the mainstream of high-end PCB
Broad support: automotive electronics, servers, AI equipment, consumer electronics, industrial control and communication equipment