Types of Printed Circuit Board: The Complete Guide

Printed circuit boards come in many varieties, each suited to different applications. Understanding PCB types helps you choose the right solution for your project.

Classification by Layer Count

Single-Sided PCB

The simplest PCB type with copper on only one side.

Characteristics:

• Components on one side, traces on the other
• Lowest cost to manufacture
• Simple designs only (no crossing traces)

Applications: Simple consumer electronics, LED lighting, calculators.

Double-Sided PCB

Copper on both sides with plated through-holes (PTH) connecting layers.

Characteristics:

• More routing flexibility
• Higher component density
• Most common PCB type

Applications: Industrial controls, power supplies, automotive systems.

Multi-Layer PCB

Three or more copper layers laminated together.

Characteristics:

• Internal power and ground planes
• Complex routing possible
• Better signal integrity

Common Configurations: 4-layer, 6-layer, 8-layer, up to 50+ layers.

Applications: Computers, smartphones, servers, networking equipment.

Classification by Flexibility

Rigid PCB

Traditional PCB on solid FR4 substrate. Cannot flex or bend, excellent mechanical support, most common.

Flexible PCB (Flex)

PCB on flexible polyimide substrate. Can bend and flex, thin and lightweight.

Applications: Wearables, cameras, smartphones, medical devices.

Rigid-Flex PCB

Combines rigid and flexible sections in one board. Eliminates connectors, enables 3D packaging.

Applications: Aerospace, military, medical implants.

Classification by Material

• FR4: Standard fiberglass-epoxy, most common
• High-Frequency: Rogers, PTFE for RF applications
• Metal Core: Aluminum base for thermal management
• Ceramic: For high-temperature applications

Choosing the Right Type

Application	Recommended Type
Simple circuits	Single-sided
General electronics	Double-sided
Complex digital	Multi-layer
Moving parts	Flexible
3D packaging	Rigid-flex
High power	Metal core

French-speaking engineers can access assemblage PCB professionnel for local assembly services, while quick-turn needs are served by PCB prêt-à-l'emploi solutions.

Manufacturing involves substrate creation, copper lamination, trace etching, and insulation. Applications span electronics, computers, medical devices, and more.