Low-cost Double-sided PCB Board Prototype Production service

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What is Double Sided PCB?

Double Sided PCB Fabrication

Double Sided PCB Definition

A double-sided PCB, which is also known as a double layer PCB, 2 layer PCB, has two conductive layers; one at the top surface and one at the bottom of the PCB. It means the circuit and components can be on two sides.

There are two conductive layers in the double-sided PCBs, so they are used for tasks where single-layer PCBs cannot work. The back of the PCB board is also utilized to implement complex designs and get the most out of the space. Due to two conductive layers, the PCB can have more components in a small area, while a similar single layer PCB can have half of the components. 

These PCBs are more advantageous and are preferred for various applications. Among all types of PCBs (single layer, double layer, and multilayer), double-sided is mostly used and preferred.

Types of double-sided PCB

Double-sided PCBs can be classified into different types. The types are,

What is double-sided PCB?

Everything You Want To Know About Double Sided PCB

Stack-up in Double Sided PCB - Double sided PCB Design

The stack-up of a double-sided PCB is quite simple. You can assume it as two single-layer PCBs joined together.

The top layer of a double-sided PCB is a conductive layer. After that, there is a dielectric layer in the center, which is the base material of the PCB. At the bottom, there is another conductive layer. Simply put, the dielectric/base layer is sandwiched between two conductive layers.

The conductive layer is made of copper, as it has excellent electrical conductivity and is also cost-effective. Gold or Silver can also be used to make a conductive layer or for its plating.

The base/dielectric layer could be made of various materials. It can be FR-4, Polyimide, PTFE, metal (aluminum, copper, or iron), or any other suitable substrate. If the base material is non-conductive, it behaves as an insulator between the two conductive layers. But if the base layer is metal, then a dielectric layer is also used to create insulation between the layers as it is necessary to prevent short circuits between the layers.

Other than the base and conductive layers, there are layers of surface finish, solder mask, and silkscreen. These layers are common in all types of PCBs as they provide extra benefits. The surface finish is for the protection of the copper layer, and it prevents oxidation and corrosion. It increases the life of the conductive layer. The solder mask also prevents the formation of solder bridges and unwanted connections. The silkscreen is used to label the components on the PCB board.

Related Reading: Standard PCB Thickness—All You Need To Know

Construction of double-sided PCB

Construction of double-sided PCB

Double Sided PCB Layers

Double Sided PCB Layers

Double Sided PCB-Top Side and Button Side

Double Sided PCB-Top Side and Button Side

Structure of Double Sided MCPCB

Structure of Double Sided MCPCB

Double-sided Flexible PCB

Double-sided Flexible PCB Circuit Board

Double-Sided Flexible PCB Stack Up

Double-sided Flexible PCB Stack-up

What Are The Design Steps For Double-Sided PCB?

The double-sided PCB design is effortless. First of all, choose EDA software. Here are recommended free PCB design software for download.

Double-sided PCB design steps:

1. Set SCH parameters
2. Draw the schematic
3. Create a new PCB file, Set parameters, and Import component library files
4. Supplement PCB library files
5. Supplementary Schematic Library File
6. Import SCH into PCB file
7. planning circuit board into the network table and components
8. automatic component layout
9. layout adjustment
10. network density analysis
11. wiring rules set
12. automatic routing
13. manually adjust the wiring
14. DRC
15. Export Gerber file

Double Layer PCB Prototype Manufacturer

JHYPCB provides double-layer PCB board prototypes and mass manufacturing services.
PCB Factory

Advantages of Double Sided PCB

Double-sided PCB is a widely used component in various applications because it can achieve greater flexibility in designing more complex circuits. The following are some advantages of double-sided PCB:

High Component Density

Double-Sided PCBs have a high component density as both sides of the PCBs are used. The components are placed on both sides, so there are more components in a small space. In single-layer PCBs, the components are placed at one side only, so the other side is blank. We utilize the other side of the PCB and make it more compact. A small area can have a large number of components.

Space-saving

The most important benefit of double-sided PCB is space-saving. It can save a lot of space as the components can be on both sides. Thus, it is half the size of a single-layer board. Due to high component density, there are more components on the board, and every area is utilized. The final board is compact, which is why it can save space. Due to this advantage, designers try to use double-sided PCBs in their projects as these are less complex than multilayer PCBs and more compact compared to single-layer PCBs. These are mostly preferred where the size of the final product matters.

Cost-effective

A double-sided PCB is the best option to save money. If the circuit can be implemented on a double-sided PCB, then there is no need to spend a magnificent amount on multilayer PCBs. It provides a compact board at a lower price.

Implementation of Complex Designs

You cannot implement a complex design on a single-layer PCB; it is almost impossible. But complex designs can be implemented on double-layer PCBs as they have an extra layer. They provide more functions on a low budget and can implement most of the designs. This is the reason it is widely used in consumer electronics and general appliances.

Double Sided PCB Prototype Fabrication

As we all know, the double-sided circuit board is a very important PCB in the printed circuit board. The market has double-sided metal-based PCB, Hi-Tg heavy copper circuit board, double-sided flexible circuit board, and double-sided high-frequency circuit board.

The most common surface treatment used in manufacturing double-sided PCB board prototypes is OSP, immersion gold, lead-free tin spraying, etc.

The double-sided PCB with a lead-free tin spraying process has the advantages of beautiful appearance, white pads, easy-to-tin pads, ease-to-solder, and low price.

Partial close-up of double-sided circuit board

Double-Sided PCB Applications

Double-sided PCBs are widely used as they are cost-effective and can deal with complex circuitry. These PCBs are used in consumer electronics. You will find such PCBs in appliances used at your home, including juicer machines and LED lighting.

These PCBs are also used for advanced power applications, such as converters, inverters, UPS, and power supplies. The usage of double-sided PCBs has increased after the increase in the demand for renewable energy.

Industrial and commercial ventilation and cooling systems are also equipped with these PCBs. They are used in HVLS fans, evaporative coolers, and HVAC systems.

Industrial instruments and machines also have double-sided PCBs for controlling and performing the job.

You will also find these PCBs in printers, mobile phones, hard drives, remote controllers, sound systems, and other commonly used appliances and devices.

In simple words, double-sided PCBs are used in almost every sector, and if they can perform the desired task, it is better to use them.

  • Industrial controls
  • Power supplies
  • Converters
  • Control relays
  • Instrumentation
  • Regulators
  • UPS systems
  • Power conversion
  • HVAC
  • LED lighting
  • Hard drives
  • Printers
  • Phone systems
  • Power monitoring
  • Automotive dashboards
  • Line reactors
  • Test equipment
  • Amplifiers
  • Traffic systems
  • Vending machines

Double Sided PCB Boards is Different From Single-sided PCB.

Double-Sided vs Single-Sided Perfboard PCB

Double sided PCB Manufacturing Process

How To Make Double-sided PCB?

The PCB manufacturing process is very precise, difficult and complicated.

The rigorous manufacturing process ensures the quality and performance of electronic finished products. Although the circuit board can be divided into single-sided PCB, double-sided PCB, and multilayer PCB according to the number of layers of the conductor pattern, the manufacturing process used is only different after the first layer is produced. Please refer to the double-sided PCB and multilayer PCB manufacturing flow chart on the right for more information.

Double-sided PCB Manufacturing Process:DFM –> Sheeting Cutting –> Drilling –> De-Derurr –> P.T.H –> Panel Plating –> Dry Film –> Exposal / Develop –> Etching –> Stripping –> Midd Check/Test –> Solder Resist –> Precure –> Exposure / Develop –> Silkscreen –> Postcure –> Surface Process –> Profile –> V-cut –> Final Clean –> E-Test –> FQC / FQA –> Packing / Shipping.

Learn more about the double-sided PCB manufacturing process step-by-step guide.

The Double-Sided PCB and Multilayer PCB manufacturing Process Flowchart

The Double Sided PCB and Multilayer PCB manufacturing Process Flowchart

The Double-sided PCB Soldering Process

How to make Double-sided PCB

Double Sided PCB Manufacturing- Etching

Double Sided PCB Assembly Process

SMT, the trendy surface mount technology in PCB assembly at present, is a technology for mounting and soldering surface mount components on a printed circuit board.

Double-sided PCB Assembly Process Step by Step:

Step 1: Solder Paste Printing
Step 2: Checking
Step 3: Pick and Place
Step 4: Sldering
Step 5: Checking Soldering Effect

If you need to place the bottom side, please turn upside down.

Step 6: bottom side printing
Step 7: Checking by eyes
Step 8: pick and place
Step 9: Soldering
Step 10: Checking Soldering Effect

Double-sided PCB Assembly Process

Get Optimal Quality 2 Layer PCB prototype at JHYPCB

JHYPCB is a leading PCB manufacturer and assembler. We have a large facility with 500+ experienced employees. We can handle small to large volume orders, and there is no restriction on the minimum order quantity. You will get solutions to all your PCB problems and queries under one roof. Our facility is equipped with the latest technology, and we have experts that can deal with complex PCBs and assemblies. We are ISO, RoHS, and UL certified.

We can provide high-quality double-sided PCBs that can deliver optimal results. We can offer small to large volume PCBs at a low cost. You can take our services for prototypes and turnkey assembly. Our services are also perfect for startups and new projects as we can even deliver only one PCB or PCBA. For more information and details, feel free to contact us.

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