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What Is a Double Sided Printed Circuit Board? (2023)

Views: 718 Author: Site Editor Publish Time: 2023-05-24 Origin: Site

Double sided PCB is a circuit board with wiring patterns on both sides of the board. Since it is difficult for wiring patterns to intersect each other, wiring patterns are provided on both sides of the board when it is difficult to fit the wiring pattern of the board on one side.

Since both sides cannot be electrically connected as they are, conductors such as copper plating are applied to connection holes called via holes to electrically connect the wiring patterns on both sides.

Application of 2 sided PCB

Various fields such as consumer electronic equipment, industrial equipment, and highly reliable equipment


A substrate with a structure in which conductive circuits are formed on both sides of the base material. It enables higher-density wiring than single-sided printed circuit boards and has developed along with the high integration of components and the sophistication of products.

A printed circuit board is a mechanism that allows parts to be arranged and fixed mechanically and allows wiring to be connected efficiently in terms of space. I have.

In addition, the insulating base material is made of epoxy resin or phenolic resin that does not conduct electricity and the part that conducts electricity uses conductors such as copper foil, and the wiring pattern is written on the board.

Therefore, once a printed circuit board is created, products with the same electronic circuit can be quickly assembled without sacrificing quality.

However, there are many cases where it can be fixed by replacing or repairing the electronic circuit.

If you understand the mechanism of printed circuit boards and the internal structure used in electronic products, you will be able to deepen your knowledge and be able to repair simple things yourself when the product breaks.

Single-sided board

A single-sided board is a board on which wiring patterns are printed and electronic equipment parts and precision equipment parts are mounted only on one side. It is suitable for mass production because it can lower the cost of production.

Double-sided board

A double-sided printed circuit board is a board on which wiring patterns are printed and electronic equipment parts and precision equipment parts are mounted on both sides.


Compared to single-sided boards, production costs are higher, but they are used for equipment with a low manufacturing budget.

Multilayer board

A multi-layer board is a printed board in which a base material on which a wiring pattern is printed and an insulator is alternately layered.

It is used in PCs and small AV equipment, etc., and mainly uses 4 to 8-layer multi-layer boards.

This has the advantage of increasing the mounting area, and multi-layer boards with dozens of layers are used in large personal computers.

How the double sided printed circuit board structure works?

A printed circuit board has a wiring pattern printed on it, but the placement of electronic circuits and electronic components varies depending on the product being manufactured.

However, as a structure of the printed circuit board, the pattern of the printed circuit board without electronic components is fixed.

The purpose of the printed circuit board is to electrically connect the electronic components that make up the actual circuit.

Therefore, various parts can be arranged and fixed mechanically, and wiring can be connected while adjusting the density by lowering or increasing the density in terms of space.

Therefore, there are various roles such as miniaturization of electronic products, productivity improvement, and cost reduction.

Benefits of Double Sided Printed Circuit Board

Printed circuit boards are very useful because once they are made, the same electronic circuit products can be mass-produced while maintaining quality. Today, printed circuit boards have become indispensable parts of various industries.

In the future, the performance of electronic products and electronic equipment will continue to improve with the development of technology.

In the future, AI (artificial intelligence) technology is expected to bring further technological innovation to the world.

If you become interested in the internal structure and mechanism of electronic devices and products and deepen your understanding, you will be able to see products from a different angle.

Is a printed circuit board different from a substrate?

First of all, the foundation refers to the basics and basics of things and organizations.

In addition, a board is a board made of an insulator with conductor wiring mounted on or inside it, or the state before electronic components are attached.

So, the essential meaning of the base and the substrate is completely different.

Probably, if you use a switchboard or a personal computer to enter characters, the kanji that is similar to the board will be converted immediately; so many people are using it with the wrong recognition. There may be.

How double sided printed circuit boards work?

The printed circuit board is designed to mechanically arrange and fix the components, allowing for efficient wiring connection in terms of space.

There are various structures such as multilayer boards, single-sided boards, double-sided boards, etc. By using them, it is possible to play various roles such as downsizing electronic products, increasing productivity, and reducing costs.

Types of printed circuit boards

There are various types of printed circuit boards, depending on the material (composition) and application. Rigid substrates, flexible substrates, and special materials such as metal base substrates are roughly classified into three types.

A common one is a rigid board with an insulating layer made of glass cloth impregnated with epoxy resin. Rigid boards include single-sided boards, double-sided boards, multi-layer penetration boards, build-up boards, and any-layer boards.

Flexible substrates include FPC and flex-rigid substrates. This flexible substrate is thin and bendable, so it is used as an alternative to connectors.

Rigid boards and flexible boards are basically the same board, but they have different properties and uses, so it is better to think of them as completely different parts. Board manufacturers are also divided into those that specialize in rigid boards and those that specialize in flexible boards.

Structure of the double sided printed circuit board

As for the structure of the printed circuit board, there are various types of printed circuit board itself, so the mechanism and structure will change depending on the type.

Roughly speaking, a printed circuit board does not require the wiring of an electronic circuit to be connected one by one.

Therefore, it is possible to reduce the possibility of incorrect wiring, and it is excellent for mass production in a short time.

The structural parts of the basic printed circuit board are insulator base materials made of epoxy resin and phenolic resin that does not conduct electricity, and the conductive parts are copper foil conductors, and the wiring pattern is drawn on the board. It looks like

As the structure of the double sided printed circuit board, it is designed in consideration of the usage and environment of the electronic equipment parts and precision equipment parts to be mounted.

In addition, the hardness and softness of the printed circuit board material also vary depending on the device to be assembled.

For example, there are a wide variety of printed circuit board structures designed, such as products that require flexibility such as foldable mobile phones, and products that require hard and durable printed circuit boards.

Printed circuit board structure

The formal name of the printed circuit board is called "Printed Circuit Board", and it is named "PCB" by taking the initials.

It is used in various electronic devices and precision equipment such as personal computers, televisions, automobiles, ships, IC devices, etc. In modern times, it has become an indispensable precision part of our comfortable and convenient life.

The structures of printed circuit boards include single-sided boards, double-sided boards, multilayer boards, etc., and depending on the product to be produced, which type of printed circuit board is most suitable used?

PCB material

A wide variety of materials are used for printed circuit board substrates, depending on the application and needs of the printed circuit board, such as heat resistance, high-frequency characteristics, and high reliability.

 Paper phenolic substrate

A double sided printed circuit board is made by impregnating paper with phenolic resin. Due to its high water absorption and low insulation resistance, it is not suitable for products that require long-term reliability or high-density mounting.
Due to its low cost, it is used in general home appliances, toys, electronic work, and self-made boards.

 Glass epoxy board

It is a printed circuit board made by impregnating glass fiber into epoxy resin and is sometimes called glass epoxy or FR-4.
It has excellent insulation resistance, heat resistance, and a small coefficient of thermal expansion, so it is widely used as a multilayer substrate that requires reliability and high-density mounting.

Ceramic substrate

This printed circuit board is made of 96% pure alumina. It has excellent heat dissipation and insulation properties, and a small coefficient of thermal expansion.
It is used as a printed circuit board or a highly reliable circuit board that needs to dissipate heat by mounting high-heat-generating components.

However, it is not widely used due to its high manufacturing cost and weak resistance to shock and is used as a printed circuit board for some module products.

 Metal material substrate

It is a printed circuit board in which an insulating layer is formed on a base material such as aluminum, iron, or copper, and a circuit is formed on it.
It has excellent thermal conductivity and can suppress temperature rise due to heat generation of parts, so it is used for power supply substrates and power modules that require heat dissipation.

About The Author

I am the Engineering and Sales supervisor working in Victorypcb from 2015. During the past years, I have been reponsible for all oversea exhibitions like USA(IPC Apex Expo), Europe(Munich Electronica) and Japan(Nepcon) etc. Our factory founded in 2005, now have 1521 clients all over the world and occupied very good reputation among them.


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