What are the process characteristics of large-size PCB? What are the application areas?

Large-size PCB, with their large size, high line complexity, and long manufacturing process, make them present some unique process characteristics in the manufacturing process.

Substrate Material

Substrate material is the basis of large-size PCB manufacturing, generally FR4, CEM-1, aluminum substrate, ceramic substrate, etc. Considering the load-bearing and electrical performance of large-size PCB, usually choose high Tg substrate material.

Shape Processing

The profile processing of large-size PCB is an important part of the manufacturing process to ensure the precision and flatness of PCB through the design and control of the profile. In order to achieve this goal, CNC milling machine, laser cutting, V-cut and other equipment are usually used for processing.

Line Production

Due to the high line complexity of large-size PCB, line fabrication becomes a key part of the manufacturing process. High-precision internal and external laminate alignment exposure machines are generally used for line fabrication. Meanwhile, high-quality electrolytic copper and light agents are used in the plating process to ensure the precision and solderability of the lines.


The assembly of large-size PCB is a complex process involving multiple steps such as mounting, press-fit, and board-splicing. In order to ensure the quality and precision of assembly, high-precision mounting and press-fit machines are usually used for the operation. Meanwhile, high-strength and high-precision splicing adhesive is used in the splicing process to ensure the stability and precision of splicing boards.


Inspection link is the last gate of large-size PCB manufacturing, through the appearance of the test, function test, characteristics of the test and other testing means to ensure that the quality and performance of PCB meet the requirements. In order to achieve this goal, advanced testing equipment such as AOI, X-ray, ICT, etc. are usually used for testing.

To summarize, the manufacturing process of large-size PCB is complex, with a long manufacturing cycle, requiring the use of advanced equipment and technology. In order to ensure manufacturing quality and performance, manufacturers need to strictly control each manufacturing process to ensure the stability and reliability of large-size PCB.

Application areas of large-size PCB

Large-size PCB (printed circuit boards) have a wide range of applications in many fields, mainly including the following:


In the aerospace field, large format PCB are used in various electronic devices and control systems. For example, large format PCB for airplanes can be used for flight control, communication, navigation, radar and entertainment systems. These PCB carry a large number of electronic components to realize various functions and play a vital role in the safety and performance of the aircraft.

Automotive Manufacturing

In automotive manufacturing, large-size PCB are used for various electronic control systems, such as engine control, brake systems, airbags, and so on. These PCB not only need to carry a large number of electronic components, but also need to have characteristics such as high-temperature resistance and corrosion resistance to ensure the safety and performance of the automobile.

Industrial Control

Large-size PCB also have a wide range of applications in the field of industrial control. For example, large industrial machines, production line control systems, power equipment, etc. need to use large-size PCB, which carry a large number of electronic components to achieve a variety of control functions, for the stability and efficiency of industrial production has an important impact.

Medical Equipment

In the field of medical equipment, large-size PCB are used in a variety of electronic devices, such as medical imaging equipment, therapeutic equipment, testing equipment and so on. These PCB need to have characteristics such as high precision and high stability to ensure the accuracy and safety of medical equipment.

In short, large-size PCB have a wide range of applications in various fields and have become an indispensable part of the modern electronics industry. With the continuous progress of science and technology, the application areas of large-size PCB will also continue to expand.

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