It has been proven that double-layer PCBs are one of the best PCBs in the field of electronic products. Although the manufacturing cost of double-sided PCBs is slightly higher than single-sided PCBs, they can provide more compact and dense circuit designs that single-sided PCBs cannot achieve. Here are their main advantages:

Since we can place components on both sides of the PCB, there is enough space available for our purposes, so space availability is an important factor compared to single-sided PCBs

We have two layers for wiring, which is beneficial for critical and high-speed design, providing better signal integrity

This double-sided PCB board provides a more flexible design as components can be easily switched from bottom to top or from top to bottom.

This type of double-layer PCB has a certain degree of complexity in design, but they are more cost-effective than multi-layer PCBs

The circuit complexity of double-sided PCB boards is slightly higher, but they are not suitable for designing high-speed circuits and critical radio frequency (RF) circuits.

Double sided PCBs cannot handle excessive current because their copper wires generate heat, making them unsuitable for high current absorption circuits.

Due to our production of double-sided PCBs, it takes more time to manufacture and produce double-layer PCBs.

If there are more types of signals in the circuit (such as analog signals, digital signals, power signals, and RF signals), wiring on two layers will be more difficult, so we need multi-layer PCBs.

Double sided PCB boards are more commonly used in power supply design for electronic devices, such as SMPS, LED driver circuits, mobile phones, remote controls, printers, etc.

Double layer PCBs are most commonly used in engine management systems and battery management systems. They are also used as control devices for vehicle C-type and D-type management systems

Double sided printed circuit boards are mainly used in the production of most industrial equipment used in the manufacturing process of products.

Double sided PCB is also used for designing network circuits, including routers, communication switches, protocol networks, etc

Double sided PCB manufacturing involves executing various steps in a serial manner to produce high-quality double-sided printed circuit boards:

Double sided PCB manufacturers can use various software to design circuits, which are used to draw schematic and layout designs for PCB boards. In the case of double-sided PCB, circuit design is accomplished by forming copper traces on two layers (top and bottom). The Gerber files for layout design will be generated through PCB software and used to print the required circuits on a double-sided PCB board.

The dielectric material of double-sided printed circuit boards is usually made of FR4 resin. This FR4 resin is composed of a grid of glass frames woven together. This glass structure is combined with resin to form a material called prepreg. FR4 dielectric material and copper foil are attached to both sides of the substrate material through heat treatment and cut into the required blocks for production, typically 18 x 24 inches.

The process of printing the required circuit on copper foil is called photolithography. During this process, a photosensitive material is used to cover the copper foil, and then the required circuit is engraved in the form of a photomask. Using ultraviolet light, it will pass through this photomask layer and project onto the copper foil. Through this process, the desired circuit pattern will be formed on the PCB.

During this process, the exposed copper will be immersed in etching chemicals, and under the action of these chemicals, the photosensitive material will remove all the exposed copper, leaving behind the copper wire required for the circuit.

In order to form mounting holes and vias on the PCB, it is necessary to use a drilling machine to generate holes of various diameters on the PCB. Installation holes are non plated through holes, while vias are plated through holes filled with copper to create electrical connections.

During this process, both sides of the PCB will be coated with a polymer protective layer, usually green. This layer of PCB can prevent copper wire corrosion and also protect the circuit board from environmental factors such as dust, smoke, and moisture. It can also prevent the formation of solder bridges during component installation.

During this process, white ink is used to generate symbols for indicators and components to be soldered onto the PCB. This screen printing process can also be used to print any type of desired logo.

For copper areas not covered by solder mask, we need to cover them with a thick layer of metal to prevent oxidation. In addition, this helps with the soldering of components on the PCB.

After the PCB is completed, thorough testing and inspection are always required, such as open and short circuit testing, AOI inspection, visual inspection, solderability testing, intermediate section and inspection.

If pursuing cost-effective FPC manufacturing services, choosing a Chinese manufacturer is the best choice. As a manufacturing powerhouse, China has abundant resources, cheap labor, and a large number of technical personnel. We recommend Haibo, a Chinese FPC assembly service provider with over 10 years of experience, who has performed outstandingly in various aspects

Efficient and reasonable quotation:There is an efficient quotation process to assist you in making decisions, providing reasonable prices and highly competitive quotes in China.
High quality and reliable products:Produce high standard printed circuit boards, manufacture and test according to specifications, international standards, and internal controls, and conduct pre production inspections to ensure robust processes.
Quick and on-time delivery:The assembly equipment is in good condition, with high productivity, minimal downtime, short delivery time, and also provides urgent services.
Timely and effective response:Always respond to customer needs, provide accurate information, answer questions through multiple channels, and offer one-stop services.
Strong technical strength:China's FPC manufacturing technology is leading, and Haibo has a complete SMT solution that covers assembly, inspection, and other capabilities. It also provides prototype production and customization services.