Basic Single Side PCB for low‑cost through‑hole assemblies

1. What is a Single Side PCB?

A Single Side PCB  is a type of PCB where the conductive copper traces  are only on one side of an insulating base plate. All electronic components, like resistors or capacitors, are mounted either on the same side as the copper traces or on the opposite side. Unlike more complex PCBs with multiple layers, it has just one conductive layer—making it the most basic form of PCB.

2. Structure of Single Side PCB

Its structure is simple, with three main parts. The chart below shows the layer structure clearly:

◈ Insulating Substrate: The core part, usually made of FR-4 (a common epoxy resin with glass fiber) or low-cost phenolic paper. It’s non-conductive, supports the other layers, and prevents short circuits.
◈ Copper Trace Layer: A thin copper foil on one side of the substrate. It’s etched into specific paths (traces) to connect electronic components.
◈Solder Mask: An optional thin insulating layer (often green) over the copper. It protects copper from oxidation and avoids accidental short circuits during assembly.

3. Key Advantages

Single Side PCB is popular mainly because of these practical advantages:
◈ Low Cost: Simple structure and production process mean lower material and manufacturing costs—ideal for budget-friendly electronics.
◈ Easy to Make: It requires fewer production steps and simpler equipment than multi-layer PCBs, so production is faster.
◈ Simple Assembly: With only one layer of traces, assembling components (soldering) is easier, and it’s simple to check for errors.
◈ Lightweight & Thin: Its single-layer design makes it lighter and thinner, suitable for small devices where space is limited.

4. Common Application Areas

Because of its simplicity and low cost, Single Side PCB is widely used in basic electronic devices we encounter daily. Here are the main application fields:
◈ Consumer Electronics: Toys, TV remote controls, calculators, simple radios, and digital clocks—most of these use Single Side PCB due to low cost.
◈ Power Supplies: Basic phone chargers, small AC-DC adapters, and low-power power supplies rely on it for simple circuit connections.
◈ Automotive Electronics: Basic parts like dashboard warning lights, door lock controls, and windshield wiper switches use it for reliable, low-cost performance.
◈ LED Lighting: Simple LED strips, basic LED bulbs, and small LED lamps—Single Side PCB can handle the low current needed for LEDs.

Summary

Single Side PCB is the simplest, most cost-effective PCB type. With one copper layer, simple structure, and easy production, it’s perfect for basic electronic devices. While it’s not suitable for complex electronics, it’s an indispensable part of our daily life, powering many low-cost, simple electronic products.

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